Carrier 50PTH, PTV specifications Alarm Relay Contacts

BM

(ECM)

SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
OFF	ON

ECM

INTERFACE

BOARD

15

LEGEND

AL	— Alarm Relay Contacts	P1	— Field Wiring Terminal Block
ASTAT	— Aquastat	RVS	— Reversing Valve Solenoid
BM	— Blower Motor	TRANS	— Transformer
CAP	— Capacitor		Field Line Voltage Wiring
CB	— Circuit Breaker		Field Low Voltage Wiring
CC	— Compressor Contactor
			Printed Circuit Trace
CO	— Sensor, Condensate Overflow
COMPR	— Compressor		Relay/Contactor Coil
DDC	— Direct Digital Control
DTS	— Discharge Temp Switch
ECM	— Electronically Commutated Motor		Condensate Pan
FP1	— Sensor, Water Coil Freeze Protection		Solenoid Coil
FP2	— Sensor, Air Coil Freeze Protection
HP	— High-Pressure Switch		Thermistor
HWG	— Hot Water Generator
JW1	— Jumper, Alarm		Ground
NSB	— Digital Night Setback		Wire Nut
LOC	— Loss of Charge Pressure Switch
MV	— Motorized Valve
NEC	— National Electrical Code

BM (ECM)

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

ECM INTERFACE BOARD LAYOUT

NOTES:

1.Compressor and blower motor thermally protected internally.

2.All wiring to the unit must comply with NEC and local codes.

3.Transformer for 208/230 v will be connected for 208 v operation. For 230 v operation, discon- nect RED lead at L1 and attach ORN lead to L1. Insulate open end of RED lead. Transformer for 220/240 v will be connected for 220 v operation. For 240 v operation, disconnect RED lead at L1 and attach ORN lead to L1. Transformer is energy limiting or may have circuit breaker.

4.FP1 thermistor provides freeze protection for water. When using antifreeze solutions, cut JW3 jumper.

5.Typical Aquazone™ thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit supply voltage.

6.24-v alarm signal shown. For dry alarm contact, cut AL2 dry jumper and dry contact will be available between AL1 and AL2.

7.Transformer secondary ground via Deluxe D board standoffs and screws to control box. (Ground available from top two standoffs as shown.)

8.Aquastat is field-supplied and must be wired in series with the hot leg to the pump. Aquastat is rated for voltage up to 277 v.

9.Place jumpers on 2 and 3, ECM board, when dehumidification mode is used.

Fig. 16 — Wiring of 50PTH,PTV,PTD026-072 Units with Deluxe D Controller, Single Phase (208/230 V)