Page 1 ROOFTOP DEDICATED OUTDOOR AIR SYSTEM (DOAS) VX MODELS INSTALLATION AND OPERATION MANUAL Base Rooftop DOAS 800 to 5750 CFM Energy Recovery Wheel Rooftop DOAS 900 to 9550 CFM...
Page 2 4. For more technical materials such as submittals, catalogs, engineering manuals, and forms, visit www.lghvac.com. For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc.
Page 3: Table Of Contents
Reference - Venting Connection Locations ........62 AHRI Rating Conditions ..............63 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 4: Safety Precautions
Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 5 DOAS fan assembly. Doing so may cause product malfunction. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 6 Failure to carefully read and follow all instructions in this manual can result in equipment malfunction or property damage. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 7 Do not allow water, dirt, or animals to enter the unit. There is risk of unit failure. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 8: Unit Nomenclature
17 = 17.5 Tons Series A = First Series Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 9: General Data
(40 CFR Part 82, Subpart F) under section 608 of CAA. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 10 (40 CFR Part 82, Subpart F) under section 608 of CAA. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 11: Energy Recovery Wheel Rooftop Doas
(40 CFR Part 82, Subpart F) under section 608 of CAA. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 12 (40 CFR Part 82, Subpart F) under section 608 of CAA. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 13: Refrigerant Safety
Verify the maximum refrigerant concentration level for spaces served by DOAS meets the concentration limit for the application. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 14: Receiving Guidelines
Do not cover parts with plastic ﬁlm or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 15: Inspection And Maintenance
Failure to follow proper instructions could result in property damage. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 16 5 to 15 tons AR-DE22-XX 15 to 30 tons Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 17: Subassemblies
Some units may be ordered with a factory- assembled vestibule that is to be ﬁeld-attached to the side of the unit. See lifting instructions. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 18 Figure 1: DOAS AR-DE Model Open View Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 19: Installation
+Only available with barometric relief. ‡ Length with side return. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 20 All dimensions are shown in inches. *No condensing section or piping vestibule, or unit has top condensing section. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 21 ﬂoor, see Alternate Supply Entry Locations in this manual. If unit is to be installed on a roof, cut access openings in the roof deck as needed. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 22 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 23 Figure 8: Downblast Discharge Ductwork Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 24 Damage to the wiring could cause severe bodily harm or death. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 25: Outdoor Air Hood Assembly
• Phillips power bit # 2 • Sheet metal bending hand tool Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 26 • The outdoor air hood on all VPRC/P units is located at the bottom of the unit. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 27 Step 5: Location of lug channel screws to remove. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 28 Step 10: Fasten the left and right triangles to the top. BEND TAB 90° Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 29 This is item #13B on the 310 casing only. OA Hood assembly with filters is complete. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 30 The outdoor air hood on all VPRC/P units is located at the bottom of the unit. • Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 31 Step 3: Install perimeter screws at 12″ centers. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 32: Piping Installation
5. For chilled water coils, the condensate drain pipe should be sized adequately to ensure the condensate drains properly. Refer to Drain Trap section. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 33: Condensate Drain Trap
ﬁeld monitoring of condensate levels. All monitoring and control shall be provided by others. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 34: Electrical Information
When providing or replacing fuses in a fusible disconnect, use dual element time delay fuses and size according to the rating plate. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 35: Control Center Components
6. Combustion blower 7. Burner manifold 8. Collector box Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 36: Component Operation
Supply fan is modulated by a 0-10 VDC, ﬁeld-provided by others. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 37: Optional Component Operation
(LPS) on a 16 character LCD display. Diff: (right dial): 5 barg Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 38 The two sensors together ensure that frost control is only initiated during a real frost condition. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 39: Microprocessor Control
Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 40 During the purge cycle, the reheat valve should be modulated to 100% open to the reheat coil. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 41: Factory-Installed Refrigeration System Components
11. Fan Cycle Switch(es): The switch(es) open or close based on liquid refrigerant pressure to control the condensing fans to maintain liquid pressure. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 42 19. Pressure Gauge & Transducer (Optional EC condenser fans only): See Optional Electronically Commutated (EC) Con- denser Fans under the component operation. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 43: Start Up Unit
Start-Up Personnel Name ___________________________________________________________________________ Start-Up Company _________________________________________________________________________________ Phone Number ____________________________________________________________________________________ Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 44 4. Water coils are balanced to design GPM. 5. Water system is free of air. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 45 Formula: % Voltage Imbalance = [100 x (VA-VD)] /VA Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 46: Start Up Checklist
Purple / Pink Purple / Pink Purple / Pink Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 47: Start Up Components
Generally, fan vibration and noise is transmitted to other parts of the building by the ductwork. To eliminate this undesirable effect, the use of ﬂexible connectors is recommended. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 48 10. Wait for calibration before cycling power 11. Proceed to Communication Setup Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 49 (Senses pressure at air inlet side of lters) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 50: Optional Energy Wheel
ﬁeld-adjustable. The VFD will be fully programmed at the factory. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 51 Inspect belts each time ﬁlters are replaced. Belts that Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 52 Optional Energy Wheel Start-Up section. rubbing between wheel and air seals. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 53: Troubleshooting - Alarms
Trip Compressor *Protective faults that require manual reset Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 54: Troubleshooting - Unit
Check duct size at discharge to ensure that air velocities are not too high. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 55: Troubleshooting - Refrigeration Circuit
50 PSIG Defective low pressure switch. Replace. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 56 Check that compressor is properly isolated and mounting bolts are tight. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 57 Moisture in system, check sight Reclaim refrigerant, check for leaks, recharge. glass. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 58 Low load or airﬂow. Increase airﬂow, check ﬁlters. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 59: Routine Maintenance
4. Door Seal • Check if intact and pliable Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 60: Maintenance Procedures
Care must be taken not to damage the coils, including the ﬁns, while cleaning. Caution: Fin edges are sharp! Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 61 ** Based upon a 52 in. energy wheel (16x16x2, quantity of 8 for 58 in. energy wheel) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 62: Reference - Venting Connection Locations
44.1 AR-DR22 / AR-DE22 14.9 23.6 25.2 57.1 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 63: Ahri Rating Conditions
AR-DR22-25I-* 5750 AR-DR22-25D-* 5750 AR-DR22-30I-* 5750 AR-DR22-30D-* 5750 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 64: Indirect Gas Fired Furnaces
Models PVF and PVG are indirect gas-fired heat modules that will be referred to in this manual as a furnace. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 65: Unit Identification
Figure 31: Typical Furnace Data Label Model Number Minimum Input BTU/HR Input BTU/HR Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 66 Figure 32: Typical Furnace Burner Heat Assembly Exchangers Collector Combustion Blower Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 67 Components and their locations will vary. Components shown are for a typical 4:1 turndown electronic modulation configuration. Figure 33: Typical Electronic Modulation Conﬁguration Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 68 Figure 34: Typical Furnace Control Logic Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 69: Typical Furnace, Electrical, And Control Components
INDIRECT GAS FIRED FURNACES Typical Furnace, Electrical, and Control Components Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 70: Gas Fired Burner Turndown
Various combinations of the methods outlined may be used to accomplish the turndown required by the application. Available turndown control options include: Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 71: Installation Of Venting For Outdoor Units
Exhaust transition and vent termination must be purchased from the factory for proper operation. Exhaust pipe is by others. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 72: Installation Of Venting For Indoor Units
Clearances from combustible material for indoor units are determined by the National Fuel Gas Code and/or other local codes. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 73: Venting Methods
Construct the vent system as shown in these instructions Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 74: Standard Indoor Venting Installation
Attach the vent terminal to the end of the exhaust pipe. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 75: Concentric Venting Installation
4 inch elbow is 6 feet and the equivalent length of a 6 inch elbow is 10 feet. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 76 Seal the opening between the wall and the air intake pipe using an appropriate method. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 77 Secure the CVA assembly to the ceiling with corrosion-resistant sheet metal screws through the mounting brackets. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 78: Two Pipe Venting Installation - Horizontal
Using an appropriate method, seal the wall openings around the piping. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 79: Two Pipe Venting Installation - Vertical
Using an appropriate method, seal the roof openings around the vent pipes. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 80 The data label located on the face of the furnace lists the requirements for the gas being supplied to the unit. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 81 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 82: Sequence Of Operation
(turn off the thermostat) for a period of five seconds. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 83: Performance Data
INDIRECT GAS FIRED FURNACES Performance Data Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 84: Furnace Start Up
IOM offer detailed information about setting the gas pressures. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 85 Use this feature to rapidly increase or decrease the gas flow. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 86 Refer to the 4:1 modulation section for proper adjustment of each section of the high turndown modulating furnace. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 87: Troubleshooting - Ignition Controller
Should the main valve later close completely and remove the flame signal, the combustion will be de-energized. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 88 LED error light is flashing or on, then the ignition controller may need to be replaced. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 89: Troubleshooting - 4:1 Modulating Furnace
In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 90 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 91 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 92 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 93 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 94: Troubleshooting - 4:1 Or High Turndown Modulating Furnace
In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 95 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 96 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 97 In all cases, verify correct terminals as shown on the unit-specific wiring diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 98: Reference - Controls
IG furnace offline Indicates communication with furnace control has failed. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 99: Maintenance
When ordering replacement parts, include the complete unit model number and serial number as shown on the unit labels. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 100: Maintenance Log
INDIRECT GAS FIRED FURNACES Maintenance Log Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 101 INDIRECT GAS FIRED FURNACES Maintenance Log Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 102: Controller
Expansion Board (Carel c.pCO Board) (Carel c.pCOe Board) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 103 19.2 K MODBUS On Exp 6 19.2 K MODBUS On Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 104 • See the wiring schematics shipped with the unit for factory-configured terminal connection points for all units. Figure 54: Main Control Board Layout. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 105 Radiometric transducers. Chilled water or hot water units only. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 106 Units with inverter scroll compressor. Heat pump units. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 107 3 enable Preheat enable Closed = start heater Unassigned Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 108 Position Indicates Unassigned Unassigned Unassigned Unassigned Unassigned Unassigned Unassigned Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 109 CAREL ExV (brown) CAREL ExV (yellow) CAREL ExV (white) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 110 2. Sequentially click two keypad buttons (Main, Alarm, Escape, Up, Enter, Down). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 111 Air Currents Economizing Rain Dehumidifying Vapor Spray Humidifying Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 112: Menu Map
Service Info Alarm Management Shutdown Alarms General Alarms Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 113 8. Cycle power to the controller. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 114: Ac Smart Setup
• For AR-DR DOAS models: CAREL Device I.D. = 18 (Decimal) and AC Smart Address = 12 (Hex) Figure 64: Device I.D. Screen. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 115 Figure 70: Clicking “Send All” to Finish Adding Devices (Step 6). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 116 Figure 73: Selecting “View Details” (Step 9). Figure 74: Selecting “Info” (Step 10). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 117: Sequences Of Operation
This requires the unit to be re-enabled manually after the shutdown alarm condition is cleared. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 118 • Heat pump defrost • Winter ramp Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 119 If the unit is a heat pump, the supply fan is always used. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 120 • If both space and return temperature sensors are present, the remaining sensor is used during a failure. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 121 • The humidification/dehumidification mode switch delay has expired; • There is a call for dehumidification. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 122 2. Fixed Capacity: The preheat call occurs when it is available. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 123 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 124 This alarm remains active after the alarm condition clears for the duration of the envelope alarm lockout delay or until the alarm is manually reset. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 125 • BMS-communicated point by disabling a pump request. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 126 Supply Fan Modulation: In heating mode, if the supply air temperature is less than 60°F, the supply fan speed decreases to maintain 60°F. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 127 • The outside air temperature increases; or • The outside humidity decreases. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 128 • From the Alarms menu go to Reset Alarms; or • Reset all alarms via the BMS. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 129: Set-Points Data Tables
100.0°F Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 130 Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 131 5,000 ppm Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 132 Airflow Set-point 0 CFM 0 CFM 999999 cfmCFM Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 133 Enabled (X) Dehumidification Enabled (X) Disabled (□) Enabled (X) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 134 Current State Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 135 120 sec. Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 136: Network Settings Data Tables
Save (X) Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 137 Enabled (X) Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 138 None, ASHP, WSHP Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 139 Hidden (Factory Password) Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 140 Enabled (X) Set-point availability varies based on unit configuration. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 141: Alarm Data
Mixed Air RH Sensor Value Not Valid Auto Informational Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 142 Sensor Value Not Valid Auto Disable Hot Deck Control Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 143 Auto until Lockout 3x in 1 hr Disable Inverter Circuit Only with Inverter Scroll Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 144 Disable HP Heating Reset EVD Error Unexpected Position Auto Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 145: Bacnet And Modbus Points
ReadCOV_NoWrite 0.1 30470 Input Analog_Input Temperature Circuit B Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 146 0.1 40046 Holding Commandable to BMS Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 147 ReadCOV_ Damper_Minimum_ 40092 Holding Minimum Set-point Commandable Setpoint Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 148 Condenser 2 Analog ReadCOV_NoWrite 0.1 30484 Input Output Output Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 149 ReadCOV_ Occupancy_Digital_Input Occupied Unoccupied 10102 Discrete Status NoWrite Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 150 Allows the BMS to control Read_ Local Coil OAD position Commandable Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 151 HGRH_Purging 10023 Discrete reheat value is purging NoWrite Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 152 Alarm Normal ReadCOV_NoWrite 10338 Discrete Sensor_Alarm. Active Alarm Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 153 Alarm Normal ReadCOV_NoWrite 10483 Discrete Alarm.Active Sensor Alarm Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 154 EVD Configuration Al_ConfigErr_EVD_1.Active Alarm Normal ReadCOV_NoWrite 10540 Discrete Alarm Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 155 Temperature Alarm Normal ReadCOV_NoWrite 10567 Discrete Sensor Alarm Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 156 Most recent alarm. See LatestAlm ReadCOV_NoWrite 30194 Input Alarm Table. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 157: Unit Status Modes
Shutdown Alarm Overrides Active Emergency Pressurization Expansion Offline Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 158: Lontalk Points
Furnace 2 Stage 1 Digital Output 0=Off 1=On Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 159 Unoccupied Cooling Set-point UnocHeatSetpt temp_p (105) Unoccupied Heating Set-point Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 160 LG Electronics, U.S.A., Inc. New Issue: IM_LG_Rooftop_DOAS_VX_Models_06_19 Commercial Air Conditioning Division 4300 North Point Parkway Alpharetta, Georgia 30022 www.lghvac.com...

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LG AR-DR12-05A Installation And Operation Manual

Safety Precautions

Unit Nomenclature

General Data

Refrigerant Safety

Receiving Guidelines

Inspection and Maintenance

Subassemblies

Installation

Outdoor Air Hood Assembly

Piping Installation

Electrical Information

Control Center Components

Component Operation

Optional Component Operation

Factory-Installed Refrigeration System Components

Start up Unit

Start up Checklist

Start up Components

Optional Energy Wheel

Troubleshooting - Alarms

Troubleshooting - Unit

Troubleshooting - Refrigeration Circuit

Routine Maintenance

Reference - Venting Connection Locations

AHRI Rating Conditions

Indirect Gas Fired Furnaces

Controller

Quick Links

Troubleshooting

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Summary of Contents for LG AR-DR12-05A

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Table of Contents