Nibe CLIMATEMASTER TRT Series Installation Operation & Maintenance page 15

T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
Figure 4: Accessory Wiring
P2 Terminal Strip
Typical
Water
Valve
A slow closing valve may be required to help reduce
water hammer. Figure 4 shows typical wiring for a
24VAC external solenoid valve. Figures 5 and 7 illustrate
typical slow closing water control valve wiring for Taco
500 series (ClimateMaster P/N AVM) and Taco SBV
series valves. Slow closing valves take approximately
60 seconds to open (very little water will flow before
45 seconds). Once fully open, an end switch allows the
compressor to be energized. Only relay or triac based
electronic thermostats should be used with slow closing
valves. When wired as shown, the slow closing valve will
operate properly with the following notations:
1. The valve will remain open during a unit lockout.
2. The valve will draw approximately 25-35 VA through
the "Y" signal of the thermostat.
NOTE: This valve can overheat the anticipator of an
electromechanical thermostat. Therefore, only relay or
triac based thermostats should be used.
Electrical – Low Voltage Wiring, Cont'd.
FOR NON-vFLOW
MOTORIZED WATER VALVE
Figure 5: Accessory Motorized Water Valve -
Typical Wiring Example #1
DXM2.5
1
Heater Switch
Aquastat
Figure 6: Two-Stage Piping
Unidad Empacada
OUT
1
Calentador Interruptor
IN
Figure 7: Accessory Motorized Water Valve -
Termostato
Typical Wiring Example #2
C
Y1
T-stat
c l i m a t e m a s t e r . c o m
Rooftop ( TRT ) Series
R e v . : N o v e m b e r 2 1 , 2 0 2 2
UNITS USING EXTERNAL
®
2
Accessory Motorized
3
Water Valve
Solenoid
Flow
Valve
Regulator
Stage 2
2
AVM
3
Taco Válvula
Stage 1
From Water Source
NOTE: Shut-off valves, strainers and
other required components not shown.
c
Capacitor
w/y
(Motor)
LED
End Switch
WATER VALVE
To Discharge
C
Y1
DXM2.5
15