Carrier AQUAZONE 50RTP03-20 - Manual (Page 34)

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Step 8 — Connect Low Voltage Wiring
THERMOSTAT CONNECTIONS — The thermostat should
be wired directly to the Aquazone™ control board. See
Fig. 17-19.
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 13 F when
using antifreeze in colder earth loop applications. See Fig. 20.
AIR COIL FREEZE PROTECTION — The air coil freeze
protection jumper JW2 (FP2) is factory set for 30 F and should
not need adjusting, unless using anti-freeze.
ACCESSORY CONNECTIONS — Terminal labeled A on
the control is provided to control accessory devices such as
water valves, electronic air cleaners, humidifiers, etc. This sig-
nal operates with the compressor terminal. See Fig. 21. 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 — Water solenoid valves may
be used on primary secondary pump and ground water installa-
tions. A typical well water control valve wiring which can
limit waste water in a lockout condition is shown in Fig. 21. A
slow closing valve may be required to prevent water hammer.
When using a slow closing valve, special wiring conditions
need to be considered. The valve takes approximately 60 sec-
onds to open (very little water will flow before 45 seconds) and
it activates the compressor only after the valve is completely
opened by closing its end switch. When wired as shown, the
valve will have the following operating characteristics:
1. Remain open during a lockout.
2. Draw approximately 25 to 35 VA through the “Y” signal
of the thermostat.
IMPORTANT: This can overheat the anticipators of
electromechanical thermostats. Only use relay based
electronic thermostats.
Capacitor
Circ Brkr
Grnd
Contactor-CC
L2 L1
Transformer
CB
Aquazone “C”
See Note
Low Voltage
Connector THERMOSTAT
WIRED DIRECTLY
TO CONTROL
BOARD
BR
NOTE: Low voltage connector may be removed for easy installation.
Fig. 17 — Low Voltage Field Wiring
THERMOSTAT
Compressor-Stage 1
Reversing Valve
Fan
24Vac Hot
Y1
Y2
O
G
R
Y
O
G
R
CompleteC 1
Y
O
G
R
24Vac Com C C
Compressor-Stage 2
C
AL AL AL
CompleteC 2
Fig. 18 — Thermostat Wiring to Complete C Board
THERMOSTAT
Compressor-Stage 1
Reversing Valve
Fan
24Vac Hot
Y1
Y2
O
G
R
O
G
R
Deluxe D 1
Y
O
G
R
24Vac Com C C
Compressor-Stage 2
C
AL1 AL1 AL
Y1
Y2
COM 2 COM 2
Deluxe D 2
Fig. 19 — Thermostat Wiring to Deluxe D Board
TYPICAL
WATER
VALVE
C
A
24 VAC
TERMINAL STRIP P2
AQUAZONE CONTROL (C Control Shown)
Fig. 20 — Typical Aquazone Control Board
Jumper Locations
Fig. 21 — Typical D Control Accessory Wiring