LG ARNH963K2A2 Installation Manual page 53

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Accessory Installation
Hydro Kit circuit 2-Way Isolation Valve connection - (third Party accessory)
2-way isolation valve is required to stop the flow of water to portions of the Hydro Kit's water piping system when the Hydro Kit Medium Tem-
perature unit is operating in cooling mode. Chilled water flow in these areas would cause damage to building materials, if condensate was
allowed to form on the surface.
1. Follow Manufacturer's instructions for terminating wires at the valve.
2. Detach front cover of the unit and then remove the control box cover.
3. Locate terminal block and terminate the valve wiring as shown for Hydro Kit Medium Temperature unit in Figure 46.
4. Re-install the control box cover and the unit access panel.
Incorrect wiring can lead to condensation on the floor or other surface. This occurs if the Hydro Kit is operated in the cooling mode thereby creating
chilled water.
Dry contact
The Dry Contact unit provides interface flexibility to the controls engineer for indoor unit operation. The Dry Contact unit is designed to en-
able or disable normal Hydro Kit operations or determine occupancy for setback temperature setting through a binary input. A binary output
indicates if a system malfunction occurred. A field supplied binary signal could be triggered using a timer, keycard switch, door switch, motion
detector, or an occupancy sensor.
Procedure
Figure 53 shows the termination of the Dry Contact control and monitoring interface (see diagram, terminals 1-4) to field provided binary
relays. Power to operate the Dry Contact is applied directly to the AC power block terminals 1 and 2.
1. Connect cN_Dry terminals 1 and 2 to a field provided binary contact. Its closure will enable (or disable) the Hydro Kit unit operation.
2. Connect cN_Dry terminal 3 to a light or relay that illuminates/closes if the Hydro Kit raises an operation fault code.
3. Connect cN_Dry terminal 4 to a light or relay that illuminates/closes when the Hydro Kit is operating.
4. If the installation specification indicates the Dry Contact will be powered from a remote source or after a third-party device is powered by
others; terminate the power wiring at the Dry Contact following Figure 54.
Figure 53: CN_DRY Connection to Control Unit Figure 54: CN_DRY Connection to Direct External Source
Due to our policy of continuous product innovation, some specifications may change without notification.
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