Section 16: Operation And Maintenance; Sequence Of Operation; To Shut Off Heater; To Start Heater - Roberts Gorden CoRayVac CRV-B-2 Installation, Operation & Service Manual

SECTION 16: OPERATION AND MAINTENANCE

DANGER
Electrical Shock Hazard
Disconnect electric
before service.
More than one
disconnect switch may
be required to
disconnect electric from
heater.
Heater must be
connected to a properly
grounded electrical
source.
Failure to follow these instructions can result in death, electric shock, injury or property damage.
The heater is equipped with a direct-spark ignition
system.

16.1 Sequence of Operation

1. Turn the thermostat up. When the thermostat
calls for heat, the pump will start immediately.
After a short period, the burners will begin their
ignition sequence. Sparking will begin at the
electrodes and the gas valve will be energized
45 seconds later.
2. The flame will be sensed by the flame sensing
rod and the electrode is de-energized.
3. If a flame is detected, the gas valve
remains open. When the call for heat is
satisfied, the burner shuts off. On CRV-Series
systems equipped with the optional ROBERTS
GORDON ® System Control, or ROBERTS
GORDON ® ULTRAVAC
continue operation for a post-purge period of
two minutes.
4. If no flame is detected, the module will close and
a purge period begins. If a flame is not
established, a second purge and warm-up will
take place and then a third trial cycle will begin.
After three trials, the module will lockout for one
hour or until reset.
5. A reset is accomplished by removing power
from the module for at least 5 seconds
Explosion Hazard
Turn off gas supply to
heater before service.
™ , the pump will
WARNING
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
(thermostat cycle is required) or automatically
after 1 hour.

16.2 To Shut Off Heater

Set thermostat to lowest setting.
Turn OFF electric power to heater.
Turn OFF manual gas valve in the heater supply line.

16.3 To Start Heater

Turn gas valve and electric power OFF and wait five
minutes for unburned gases to vent from heater.
Turn ON main gas valve.
Turn ON electric power.
Set thermostat to desired temperature.
Burner should light automatically.
16.4 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.
Turn off gas and electric supplies before performing
service or maintenance. Allow heater to cool before
servicing.
Before every heating season, a contractor qualified in
the installation and service of gas-fired heating
equipment must perform a thorough safety
SECTION 16: O M
PERATION AND AINTENANCE
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
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