Carrier PTV, 50PTH specifications Lwt, Spt

					Deluxe D
22
	LEGEND			NOTES:
AL	— Alarm Relay Contacts	Field Line Voltage Wiring
ASTAT	— Aquastat		Relay Contacts - N.C.	1.	Compressor and blower motor thermally protected internally.
BM	— Blower Motor	Field Low Voltage Wiring		2.	All wiring to the unit must comply with NEC and local codes.
BMC	— Blower Motor Capacitor		Relay Contacts - N.O.	3.	208-240 60 Hz units are wired for 208v operation. For 240v 60 Hz
BR	— Blower Relay	Printed Circuit Trace	Low Pressure Switch		operation switch RED wire to ORG wire. 2240240v 50 Hz units are
CB	— Circuit Breaker				wired for 240v operation. For 220v 50 Hz operation switch ORG
CC	— Compressor Contactor	Optional Wiring	High Pressure Switch		wire to RED. Transformer is energy limiting or may have circuit
DTS	— Discharge Temperature Switch				breaker.
ECM	— Electronically Commutated Motor	Relay/Contactor Coil	Circuit Breaker	4.	FP1 thermistor provides low temperature protection for water.
FP1	— Sensor, Water Coil Freeze Protection				When using antifreeze solutions, cut JW3 jumper.
FP2	— Sensor, Air Coil Freeze Protection			5.	Refer to thermostat installation, application and operation manual
HP	— High-Pressure Switch	Condensate Float Switch	Splice Cap		for control wiring to the unit. Wire from ECM to “Y” CXM when a
HPWS	— High-Pressure Water Switch				motorized valve is not used. Thermostat wiring must be “Class 1”
HWG	— Hot Water Generator	Solenoid Coil			and volatage rating equal to or greater than unit supply voltage.
JW	— Jumper Wire			6.	24v alarm signal shown. For dry alarm contact, cut JW1 jumper.
LOC	— Loss of Charge Pressure Switch	Temperature Switch			Dry contact will be available between AL1 and AL2.
LWT	— Leaving Water Temperature	Thermistor		7.	Transformer secondary ground via green wire with yellow stripe
MV	— Motorized Valve				from “C” terminal to control box
MVES	— Motorized Valve End Switch	Ground		8.	Aquastat is supplied with unit and must be wired in series with the
NEC	— National Electrical Code				hot leg to the pump. Aquastat is rated for voltages up to 277v.
P1	— Field Wiring Terminal Block	Wire Nut		9.	For field-installed two-position hot water reheat coils disconnect
RH	— Relative Humidity				wire from terminal W1 and connect to field-supplied hot water
RVS	— Reversing Valve Solenoid		* Optional wiring.		valve.
SPT	— Space Temperature Sensor
TRANS	— Transformer

Fig. 23 — Wiring of 50PTH,PTV,PTD026-072 with Deluxe D and WSHP Open Multiple Protocol Controls (Single-Phase 208-230 V)