Toshiba Carrier MMDMMD-AP0120VHG2UL Installation, Operation And Maintenance Manual page 21

Pre-Startup
Building Envelope—All building windows and doors should
be installed and closed before starting unit. During summer
construction, avoid unit sweating by allowing for gradual pull
down: use reduced capacity and use maximum available
airflow.
Temperature Controls-Check that unit is connected to the
controls system and communicating properly.
Outside Air and Freeze Protection
WARNING: Insure that the property is protected against
freezing conditions Failure to provide freeze protection
may result in property damage. Freeze protection
measures are customer-provided and installed and include
but are not limited to low-limit thermostats, automatic temper-
ature controls, and outside air dampers.
Startup
1. Insure electrical installation agrees with the unit name-
plate (voltage, branch circuit protection, wire size).
2. Close all panels and access doors. Make sure filter me-
dia is clean before starting unit. Replace filter if neces-
sary.
3. Verify that discharge ductwork and input plenum are in
place and secure.
4. Apply power to unit. If unit is equipped with on-board
power switch(es), turn switch(es) to the "On" position.
5. Insure that controls system has power and is operational.
6. Force control system to send fan on signal and speed
signal. Refer to unit wiring diagram and electrical section
for fan speed control arrangement.
7. Fan should start and run. Make sure fan operates with-
out significant noise or vibration.
8. Allow control system to start condensing unit, or as re-
quired for the installation.
9. Complete the checklist on the Start-Up Report.
10. Follow additional startup procedures for the system as
required by the condensing unit.
Fan Airflow Step-Up
If the duct system ESP is higher than planned and increased
Air Handler ESP is needed, shift the terminals as shown in
Figure 15 images.
Refer to the curves for airflow performance (pages 26-27).
035-000051-001
START-UP
Page 21 of 60
Fig. 14 — Fan Wheel Rotation—
FORWARD CURVED FAN
Fig. 15 — Fan Terminal Settings—
ESP Adjustment
MMD IOM 1.2 11-10-2020