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Step 9 — Wire Field Controls
THERMOSTAT CONNECTIONS — The thermostat
should be wired directly to the Aquazone™ control board. See
Fig. 13-20, and 22.
WATER FREEZE PROTECTION — The Aquazone control
allows the field selection of source fluid freeze protection
points through jumpers. The factory setting of jumper JW3
(FP1) is set for water at 30 F. In earth loop applications, jumper
JW3 should be clipped to change the setting to 10 F when
using antifreeze in colder earth loop applications. See Fig. 23.
AIR COIL FREEZE PROTECTION — The air coil freeze
protection jumper JW2 (FP2) is factory set for 30 F and should
not need adjusting.
ACCESSORY CONNECTIONS — Terminal A on the control
is provided to control accessory devices such as water valves,
electronic air cleaners, humidifiers, etc. This signal operates
with the compressor terminal. See Fig. 24. Refer to the specific
unit wiring schematic for details.
NOTE: The A terminal should only be used with 24 volt
signals — not line voltage signals.
WATER SOLENOID VALVES — An external solenoid
valve(s) should be used on ground water installations to shut
off flow to the unit when the compressor is not operating. A
slow closing valve may be required to help reduce water
hammer. Figure 24 shows typical wiring for a 24-vac external
solenoid valve. Figures 25 and 26 illustrate typical slow closing
water control valve wiring for Taco 500 Series and Taco ESP
Series valves. Slow closing valves take approximately 60 sec.
to open (very little water will flow before 45 sec.). Once fully
open, an end switch allows the compressor to be energized (on-
ly on valves with end switches). Only relay or triac based elec-
tronic 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 to 35 VA through
the “Y” signal of the thermostat.
NOTE: Low voltage connector may be removed for easy installation.
Fig. 22 — Low Voltage Field Wiring
COMPLETE C CONTROL
CAPACITOR
LINE
LOAD
COMPRESSOR CONTACTOR
TRANSFORMER
Y
GGGGR
W
O
Y2
Y1
G
R
C
Y2
Y1
G
O
W
C
R
DH
AL1
A
A
AL1
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
OFF
ON
G
DEHUM
CFM
TB1
J1
S1
THERMOSTAT CONNECTION
a50-8197
Fig. 23 — Typical Aquazone Control Board
Jumper Locations (Complete C Control Shown)
a50-6268tf
IMPORTANT: Connecting a water solenoid valve can
overheat the anticipators of electromechanical thermo-
stats. Only use relay based electronic thermostats.
TYPICAL
WATER
VALVE
C
A
24 VAC
TERMINAL STRIP P2
Fig. 24 — Typical Deluxe D Control
Accessory Wiring
a50-6269ef
Fig. 25 — AMV Valve Wiring
C
C
THERMOSTAT
1Y
1
2
3
1Y
AMV
TACO VALVE
HEATER SWITCH
a50-8441
Fig. 26 — Taco SBV Valve Wiring
a50-8442