Form I-RDF, P/N 148384 (Rev 1), Page 23
oCheck output of pilot flame signal. Use microampmeter; reading should
be .5 or greater.
oTo check lockout feature of the pilot ignition system, turn pilot manual
shutoff valve OFF. Pilot should lockout after two trials for ignition. To
reset unit, open the valve and cycle the main disconnect switch.
oTurn OFF the manual gas valve. Wait 30 seconds for unit to cool. Return
both burner and blower switch to OFF position. Turn OFF disconnect
switch.
4. Check pilot pressure --
oTo check pilot gas pressure, connect a "U"-tube manometer to the pressure
tap on the downstream side of the pilot solenoid valve.
oPut BOTH the blower and burner switch in TEST position. Turn ON
disconnect switch. Blower should be energized.
oMeasure pilot gas pressure. Pilot pressure for natural gas should be 3.5"
w.c.; pilot pressure for propane gas should be 6" w.c. Pilot pressure
should be correct, but if the pressure is not correct, discontinue startup
until the pilot gas pressure is regulated correctly.
(To adjust pilot pressure, remove the cap from the regulator. Turn adjust-
ment clockwise to increase gas pressure or counterclockwise to decrease
gas pressure.) When pressure is correct, shut off the gas, remove the
manometer, and replace the pressure tap cap on the pilot solenoid valve.
5. Verification of inlet gas pressure -- If, with the blower and burner
operating, the inlet main gas pressure measured in Step 3 does not
correspond to the minimum stated on the rating plate, check the main
burner inlet gas pressure. If the main inlet gas pressure is lower than
stated on the rating plate, full burner firing rate will not be achieved.
Check main gas supply service regulator for adjustment.
oTurn disconnect switch OFF.
oRe-connect the "U"-tube manometer to the main burner pressure tap.
oTurn pilot manual shutoff valve back ON.
oTurn the disconnect switch ON; ignition sequence will occur.
oObserve the main burner. Light off should occur along the entire length of
the burner.
oAfter approximately one minute, record the gas pressure reading on the
manometer. NOTE: High outside air temperature on high fire may cause
the automatic high limit to trip. Manometer reading may only be available
for a very short time.
oTurn disconnect switch OFF.
oRemove the manometer and replace the plug.
oRemove all jumper wires and reconnect wires.
oVerify that the blower, burner, and damper switches are in RUN position.
CAUTION: If blower or burner service switches are left in TEST position,
they will override control from the remote console, switch, or automatic
control.
oCheck that all manual valves are ON.
oClose the control door panel; secure latches.
oTurn ON the disconnect switch. The system is now operational from the
control switch, the remote console, or other type of optional automatic
control. CAUTION: Burner will not operate if ambient air temperature is
above setpoint of outside air control (factory setting is 60°F).
oReturn this manual to the owner's envelope. Keep for future reference.
oTo check for toxic vapors coming from the surrounding outside atmo-
sphere or being produced by the installation (See DANGER below), it is
After Startup
Startup for
Continuous
Operation
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