Roberts Gorden CoRayVac CRV-B-6 - Manual (Page 52)

CRV-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL
46
12.3 SPST Transformer Relay (P/N 90417600K)
The transformer relay wiring diagram is shown on
Page 47, Figure 28
. The transformer relay can be
used to control an EP-100 or EP-201 pump
CORAYVAC
® system. The single pole relay can only
be used to control one zone of burners.
The electrical circuit is a 120 V AC (20 A) supply.
The transformer 24 V AC output for the thermostat is
rated at 40 V A. Thermostats used with the
transformer must not exceed this power requirement.
A transformer relay operated system will not give any
post purge pump operation to completely exhaust
products of combustion from the system or provide
indication of operating conditions.
12.4 DPST Transformer Relay (P/N 90436300)
The transformer relay wiring diagram is shown on
Page 49, Figure 30
. The transformer relay can be
used to control an EP-100 or EP-201 pump
CORAYVAC
® system. The double pole relay can only
be used to control two zones of burners.
The electrical circuit is a 120 V AC (20A) supply.
The transformer 24 V AC output for the thermostat is
rated at 40 VA. Thermostats used with the
transformer must not exceed this power requirement.
A transformer relay operated system will not give any
post purge pump operation to completely exhaust
products of combustion from the system or provide
indication of operating conditions.