10
Unit Installation
◆
HLR12Pd/Na-M, HLR14Pd/Na-M
4.8 Wiring of the 2-Way Valve
The 2-way valve is required to control water flow for cooling operation. The role of 2-way valve is to cut off
water flow into the underfloor loop when the fan coil unit is equipped for cooling operation.
General Information
Type
Power
Operating Mode
Supported
NO 2-wire
230V 50Hz 1Ph AC
Closing water flow
Yes
Opening water flow
Yes
NC 2-wire
230V 50Hz 1Ph AC
Closing water flow
Yes
Opening water flow
Yes
(1) Normal Open type. When electric power is NOT supplied, the valve is open. (When electric power is
supplied, the valve is closed.)
(2) Normal Closed type. When electric power is NOT supplied, the valve is closed. (When electric power is
supplied, the valve is open.)
How to Wire 2-Way Valve:
Follow steps below to wire the 2-way valve.
Step 1. Uncover the front cover of the unit and open the control box.
Step 2. Find the terminal block and connect wires as below.
4
5
6
10
11
12
2-Way Valve 2
2-Way Valve 1
XT2
L1(OFF)
L2(ON)
L1(OFF)
L2(ON)
N
N
