Operation And Maintenance; Sequence Of Operation; Start Up Procedure - Roberts Gorden CoRayVac CRV-B-2 Installation, Operation & Service Manual

! ! ! ! ! SECTION 13: OPERATION AND MAINTENANCE

13.1 Sequence of Operation

Turn the thermostat up. When the thermostat calls for
heat, the pump will start immediately. After a small delay,
the burners will begin their ignition sequence, 45
seconds later, sparking will begin at the electrode. Upon
sparking of the electrodes, the gas valve is energized.
The flame will be sensed by the flame sensing rod and
the electrode is de-energized.
If a flame is detected, the gas valve remains open. When
the call for heat is satisfied, the burner shuts off. On
CORAYVAC ® systems equipped with the optional
ROBERTS GORDON ®
Control, the pump will continue operation for a post-
purge period of two minutes.
If no flame is detected on the module, the gas valve
is closed, and a purge period begins. After the purge,
the module resets, and there is a second trial for
ignition. If flame is still not established, a third purge,
and trial cycle begins. After 3 trials, the module will
lockout until reset. Reset is accomplished by
removing power from the module for at least 5
seconds (thermostat cycle required) or automatically
after one hour.
BZC Controllers or System
S

13.2 Start Up Procedure

Pre-Season Maintenance and Annual Inspection
To ensure your safety and years of trouble-free
operation of the heating system, service and annual
inspections must be done by a contractor qualified in
the installation and service of gas-fired heating
equipment.
Disconnect gas and electric supplies before
performing service or maintenance.
Before every heating season, a contractor qualified in
the installation and service of gas-fired heating
equipment must perform a thorough safety inspection
of the heating system.
For safety and best performance, the gas, electrical,
thermostat connections, tubing, venting, suspensions
and overall heating system condition are some of the
areas requiring inspection.
NOTE: Gas flow, burner ignition and pump operation
are among the first things that should be inspected.
Please see the chart on Pages 50 and 51 , for
suggested items to inspect.
13: O M
ECTION PERATION AND AINTENANCE
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