User Manual

Serengeti-IR
™
Installation, Operation & Service
Combustion Research Corporation Page 27
TO START SYSTEM
WARNING
FIRE OR EXPLOSION HAZARD
FIRE OR EXPLOSION HAZARD. CAN
CAUSE DEATH, SEVERE INJURY
AND/OR PROPERTY DAMAGE.
It is the installer’s final responsibility to verify correct
gas usage.
Do not use a gas control set for natural gas on LP as
or a gas control set for LP Gas on Natural Gas
.
1. Check to insure that main gas cock from meter is open.
Check burner to insure that gas cock is open.
2. Turn the main power switch ON and check fuse.
3. Set the thermostat higher than the existing temperature
of the area to be heated. The following step should
take place automatically:
The blower is powered and will start. The air flow
switch is then powered and supplies power to the
burner control. The ignition control will produce the
spark ignition as well as opening the gas valve and
allowing gas flow. The gas will then ignite.
4. Check burner to see that it is operating.
5. At this time, manually shut off the gas and verify that
the "flame failure shutdown" occurs. Open the manual
gas valve and turn off the power to the SERENGETI-
IR
™
BURNER ASSEMBLY to reset the control.
6. Set the thermostat down to the desired temperature.
NOTE - When the heater is initially fired, solvents or
any oil that is on the pipe work and fittings will burn
off and form a light haze in the building which can
best be removed by the ventilation system in the
building, or by opening the doors. This is a one time
problem and will not recur.
SEQUENCE OF OPERATION
1. Thermostat calls for heat.
2. Combustion air blower is energized.
3. The differential air flow switch proves operation of the
blower and the ignition control is energized.
4. After pre-purge timing, the spark ignition and gas valve
are energized.
5. The ignition control senses the flame (flame
rectification) and turns off the spark ignition.
6. After the thermostat is satisfied, the power is removed
from the burner assembly causing the ignition control
and gas valve to turn off and the blower shuts down.
7. System waits for the next call for heat.
RESETTING THE IGNITION CONTROL
The SERENGETI-IR
™
BURNER ASSEMBLY is equipped
with an automatic lockout control which is activated after
60 seconds if a burner should fail to ignite. If your burner
should lock out, it should be reset by the following method:
1. Turn off the disconnect switch located near the burner
or turn down the thermostat to stop the entire system.
2. Wait 5 minutes for the ignition timer switch to cool and
automatically reset.
3. Turn the power back on and/or turn the thermostat
back up.
4. The system will now automatically recycle on the
thermostat to maintain desired room temperature.
IF THE BURNER WILL NOT LIGHT AFTER TWO RESET
TRIALS, CONTACT YOUR INSTALLER FOR SERVICE.
GAS CONTROL KNOB SETTING:
The gas control knob has two settings.
OFF (knob turned clockwise) prevents main burner
gas flow.
ON (knob turned counter clockwise) permits main
burner gas flow. Under control of the thermostat and
direct ignition module, gas can flow to the main burner.
NOTE: Controls are shipped with the gas control knob in
the ON position.
WARNING
FIRE OR EXPLOSION HAZARD
FIRE OR EXPLOSION HAZARD. CAN
CAUSE DEATH, SEVERE INJURY
AND/OR PROPERTY DAMAGE.
1. Do not force the gas control knob. Use only your
hand to turn the gas control knob. Never use tools.
2. If the gas control knob will not operate by hand, a
qualified service technician should replace the gas
control.
STOPPING THE SYSTEM FOR SERVICE
1. For servicing an individual SERENGETI-IR
™
BURNER
ASSEMBLY, turn off the disconnect switch which
should be mounted within two feet (2') of the unit.
Close the gas supply to the burner at the individual
burner gas cock.
2. To service the thermostat, turn off the electrical power
at the main power disconnect box.
3. Before servicing any gas component, shut off the gas
supply at the meter by closing the main gas valve.
SYSTEM START / MAINTENANCE & SERVICE
!
!