Installer’s Guide
21
LOW VOLTAGE HOOK UP DIAGRAMS FOR OIL FURNACE WITH PSC MOTOR
(SINGLE STAGE COOLING)
Using 18 gauge control wire, connect control wiring to
thermostat as shown in the following illustrations. If
the thermostat does not have an isolated heating cir
-
cuit (RH), then install a pilot duty rated, 24 volt, relay
(RLY00975, field supplied). This relay is shown as R1
in the illustrations. Consult the National Electrical
Code, ANSI/NFPA 70-2002, for guidelines for proper
wiring methods and materials for this circuit.
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SINGLE STAGE HEAT/ COOL WITH 24V RELAY
NOTE:
Thermostat "R" terminal may be labeled as "RC" or
"RH".
SINGLE STAGE HEAT/ COOL WITH RH/ RC CIRCUIT
NOTE:
Thermostat "R" terminal may be labeled as "RC" or
"RH".
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