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LEGEND
AL — Alarm Relay Contacts
ASTAT — Aquastat
BM — Blower Motor
BMC — Blower Motor Capacitor
BR — Blower Relay
CB — Circuit Breaker
CC — Compressor Contactor
DTS — Discharge Temperature Switch
ECM — Electronically Commutated Motor
FP1 — Sensor, Water Coil Freeze Protection
FP2 — Sensor, Air Coil Freeze Protection
HP — High-Pressure Switch
HPWS — High-Pressure Water Switch
HWG — Hot Water Generator
JW — Jumper Wire
LOC — Loss of Charge Pressure Switch
LWT — Leaving Water Temperature
MV — Motorized Valve
MVES — Motorized Valve End Switch
NEC — National Electrical Code
P1 — Field Wiring Terminal Block
RH — Relative Humidity
RVS — Reversing Valve Solenoid
SPT — Space Temperature Sensor
TRANS — Transformer
Deluxe D
Field Line Voltage Wiring
Relay Contacts - N.C.
Field Low Voltage Wiring
Relay Contacts - N.O.
Printed Circuit Trace
Low Pressure Switch
Optional Wiring
High Pressure Switch
Relay/Contactor Coil Circuit Breaker
Condensate Float Switch Splice Cap
Solenoid Coil
Temperature Switch
Thermistor
Ground
Wire Nut
* Optional wiring.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208-240 60 Hz units are wired for 208v operation. For 240v 60 Hz
operation switch RED wire to ORG wire. 2240240v 50 Hz units are
wired for 240v operation. For 220v 50 Hz operation switch ORG
wire to RED. Transformer is energy limiting or may have circuit
breaker.
4. FP1 thermistor provides low temperature protection for water.
When using antifreeze solutions, cut JW3 jumper.
5. Refer to thermostat installation, application and operation manual
for control wiring to the unit. Wire from ECM to “Y” CXM when a
motorized valve is not used. Thermostat wiring must be “Class 1”
and volatage rating equal to or greater than unit supply voltage.
6. 24v alarm signal shown. For dry alarm contact, cut JW1 jumper.
Dry contact will be available between AL1 and AL2.
7. Transformer secondary ground via green wire with yellow stripe
from “C” terminal to control box
8. Aquastat is supplied with unit and must be wired in series with the
hot leg to the pump. Aquastat is rated for voltages up to 277v.
9. For field-installed two-position hot water reheat coils disconnect
wire from terminal W1 and connect to field-supplied hot water
valve.
Fig. 23 — Wiring of 50PTH,PTV,PTD026-072 with Deluxe D and WSHP Open Multiple Protocol Controls (Single-Phase 208-230 V)
a50-8570