Installation, Operation & Maintenance - HNW Series
Electrical - Low Voltage Wiring
Figure 6: AVM Valve Wiring
C
C
Termostato
Y
1
2
3
Y
AVM
Taco Válvula
Calentador Interruptor
Unidad Empacada
C
C
Aquastat
Y1
1
2
3
Y1
AVM
Taco Valve
Heater Switch
DXM2
A-Stat
DXM
C
C
Y1
Y1
End Switch
TACO VALVE
LED
C
W/Y
Figure 6: Taco Valve Wiring
Unit is typically controlled by field installed and
wired aquastat and mode changeover switch (R to
O is cooling mode). Wire to DXM P1 terminals, use
minimum 18GA Class II wire.
Note: Do not close up unit until checkout is
completed.
Low Voltage Wiring
Water Solenoid Valves
An external solenoid valve(s) (with end switch so valve is fully
open before compressor starts) should be used. Valve should
also be normally closed type so water flows through only
when unit is operating. A slow closing valve may be required
to help reduce water hammer. Typical wiring for a 24VAC
external solenoid valve. Figures 5 or 6 illustrate typical slow
closing water control valve wiring for Taco zone sentry series
(Comfort-Aire/Century P/N AMV…) 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 closure allows the compressor to
be energized. 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 aquastat
17
Содержание Century EarthPure HNW Series
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