Carrier 50PCH specifications Wire Field Controls, A50-8441, A50-8442

Step 9 — Wire Field Controls

THERMOSTAT CONNECTIONS — The thermostat should be wired directly to the Aquazone™ control board. See Fig. 13-20, and 22.

COMPRESSOR CONTACTOR CAPACITOR COMPLETE C CONTROL

TERMINAL STRIP P2

C

TYPICAL

LINE LOAD

TRANSFORMER

a50-8197

J1

Y

W	R	S1
		CFM
		SW1
O		SW2
	G	SW3
		SW4
		SW5
Y2	G	SW6
		SW7
		SW8
Y1	G	SW9
		OFF	ON
G	G	G DEHUM

		TB1
R	C	Y2 Y1 G	O	W	C	R DH AL1 A	A	AL1

THERMOSTAT CONNECTION

	24 VAC WATER
	VALVE
A	a50-6269ef

Fig. 24 — Typical Deluxe D Control

Accessory Wiring

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

NOTE: Low voltage connector may be removed for easy installation.

Fig. 22 — Low Voltage Field Wiring

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.

a50-6268tf

Fig. 23 — Typical Aquazone Control Board

Jumper Locations (Complete C Control Shown)

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 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.

IMPORTANT: Connecting a water solenoid valve can overheat the anticipators of electromechanical thermo- stats. Only use relay based electronic thermostats.

C Y1

a50-8441

	2	AMV
1	3	TACO VALVE
	HEATER SWITCH
C	Y1
THERMOSTAT

Fig. 25 — AMV Valve Wiring

a50-8442

Fig. 26 — Taco SBV Valve Wiring

20