44
7. Check the low gas pressure switch (if provided).
(For proper adjustment, use the attached
manometers, if available, to set pressure. The
scales on the switch are approximate only.) Low
gas pressure switch (if provided) must be set at
3.0 in. WC for natural gas and propane gas.
8. Make sure that the high gas pressure switch (op-
tional) is set to 3.0 in. WC for both natural gas and
propane gas.
Follow-Up
Safety checks must be recorded as performed.
Turn boiler on. After main burner ignition:
1. Check manometer for proper readings.
Specifically note the change in air intake pressure.
Replace the filter if necessary. (Refer to Table Q.)
2. Cycle unit several times and re-check readings.
3. Remove all manometers and replace caps and
screws.
4. Check for gas leaks one more time.
Post Start-Up Check
Check off steps as completed:
1. Verify that the boiler and heat distribution units or
storage tank are filled with water.
2. Confirm that the automatic air vent (if used) was
opened two full turns during the venting proce-
dure.
3. Verify that air has been purged from the system.
4. Verify that air has been purged from the gas pip-
ing, and that the piping has been checked for
leaks.
5. Confirm that the proper start-up procedures were
followed.
6. Inspect burner to verify flame.
7. Test safety controls: If boiler is equipped with a low
water cut-off or additional safety controls, test for
operation as outlined by manufacturer. Burner
should be operating and should go off when con-
trols are tested. When safety devices are restored,
burners should re-ignite after pre-purge time
delay.
8. Check to see that the high limit control is set
above the design temperature requirements of the
system. For multiple zones: Check to make sure
the flow is adjusted as required in each zone.
9. Check that the boiler is cycled with the thermostat.
Raise the setting on the thermostat to the highest
setting and verify that the boiler goes through the
normal start-up cycle. Reduce to the lowest set-
ting and verify that the boiler goes off.
10. Observe several operating cycles for proper oper-
ation.
11. Set the boiler thermostat to desired temperature.
12. Review all instructions shipped with this boiler with
owner or maintenance person, return to envelope
and give to owner or place the instructions inside
front panel on boiler.
OPERATION
Lighting Instructions
1. Before lighting, make sure you have read all of the
safety information in this manual.
2. Set the thermostat to the lowest setting.
3. Turn off all electrical power to the appliance.
4. This appliance is equipped with an ignition device
which automatically lights the burner. Do not try to
light the burner by hand.
5. Turn on main manual gas valve field-installed near
gas inlet connection on back of boiler.
6. Wait 5 minutes to clear out any gas. Then smell for
gas, especially near the floor. If you then smell
gas, STOP! Follow the steps in the safety informa-
tion on the front cover of this manual. If you do not
smell gas, go to next step.
7. Turn on all electrical power to the appliance.
8. Set thermostat to desired setting. The appliance
will operate. The igniter will spark after the pre-
purge time delay (15 seconds). The main valve
should open. System will try for ignition up to four
times (one time on optional single-try ignition mod-
ule). If flame is not sensed, lockout will
commence.
Summary of Contents for H 300 Series
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