Payne PF1B, Manual

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CONTROLS
SEQUENCE OF OPERATION — PH1S090 OUTDOOR UNIT
WITH PF1B090 INDOOR UNIT — When power is supplied to
unit, the transformer (TRAN) is energized. The crankcase
heater is also energized.
Cooling — With the thermostat subbase in the cooling position,
and when the space temperature comes within 2° F of the cool-
ing set point, the thermostat makes circuit R-O. This energizes
the reversing valve solenoid (RVS) and places the unit in
standby condition for cooling.
As the space temperature continues to rise, the second stage of
the thermostat makes, closing circuit R-Y. When compressor
time delay (5 ± 2 minutes) is completed, a circuit is made to con-
tactor (C), starting the compressor (COMP) and outdoor-fan
motor (OFM). Circuit R-G is made at the same time, energizing
the indoor-fan contactor (IFC) and starting the indoor-fan motor
(IFM) after one-second delay.
When the thermostat is satisfied, contacts open, deenergizing
C. The COMP, IFM, and OFM stop.
Heating — On a call for heat, thermostat makes circuits R-Y
and R-G. When compressor time delay (5 ± 2 minutes) is com-
pleted, a circuit is made to C, starting COMP and OFM. Circuit
R-G also energizes IFC and starts IFM after a 1-second delay.
Should room temperature continue to fall, circuit R-W is made
through second-stage thermostat bulb. If optional electric heat
package is used, a relay is energized, bringing on supplemental
electric heat. When thermostat is satisfied, contacts open,
deenergizing
contactor and relay; motors and heaters
deenergize.
Defrost — Defrost board (DB) is a time and temperature con-
trol, which includes a field-selectable time period between
checks for frost (30, 50, and 90 minutes). Electronic timer and
defrost cycle start only when contactor is energized and defrost
thermostat (DFT) is closed (below 28 F [−2.2 C]).
Defrost mode is identical to Cooling mode, except outdoor-fan
motor (OFM) stops and a bank of supplemental electric heat
turns on to warm air supplying the conditioned space. Defrost
mode is terminated when the DFT reaches 65 F (18.3 C).
TYPICAL CONTROL WIRING SCHEMATIC
LEGEND
AWG — American Wire Gage
C — Contactor Compressor
CB — Circuit Breaker (Compressor)
CH — Crankcase Heater
CLO — Compressor Lockout
COMP — Compressor Motor
COTP — Compressor Over
Temperature Protection
CTD — Compressor Time Delay
DB — Defrost Board
DFT — Defrost Thermostat
EQUIP GND — Equipment Ground
HC
— Heater Connector
HPS — High-Pressure Switch
HR — Heater Relay
HTR — Heater
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
LCS — Loss-of-Charge Switch
LLSV — Liquid Line Solenoid Valve
NEC — National Electrical Code
OFC — Outdoor-Fan Contactor
OFM — Outdoor-Fan Motor
OL — Overload Relay
PCB — Printed Circuit Board
RVS — Reversing Valve Solenoid
TB — Terminal Block
TRAN — Transformer
T’STAT — Thermostat
Terminal Block Connection
Terminal (Unmarked)
Terminal (Marked)
Field Splice
Factory Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Accessory or Optional Wiring
Field Power Wiring
PCB Run
NOTES (PH1S090 Unit)
1. If any of the original wire furnished must be replaced, it must be re-
placed with type 90 C wire or its equivalent.
2. Set heat anticipator at .6.
3. Use copper conductors only.
4. Three-phase motors are protected under primary single-phasing
conditions.
5. The CLO locks out the compressor to prevent short cycling on com-
pressor overload and safety devices. Before replacing CLO, check
these devices.
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