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SECTION D: Start up
45
Fig. 40: Leak Test Procedure
Post Start-Up Check
Check off steps as completed:
1. Verify that the heater 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 procedure.
3. Verify that air has been purged from the system.
4. Verify that air has been purged from the gas piping,
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 heater 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. Test limit control: While burner is operating, move
indicator on high limit control below actual water
temperature. Burner should go off while blower
and circulator continue to operate. Raise setting on
limit control above water temperature and burner
should re-ignite after pre-purge time delay.
NOTE: Ignition control may have to be reset after
this portion of the test.
9. Test ignition system safety device:
a. Open manual gas valve. Turn power on.
b. Set thermostat to call for heat.
c. When the heater is in operation, pull cap off of
tee in air switch hose. The burner should go
off almost immediately.
d. Reattach cap on tee. Burner should re-ignite
after pre-purge time delay. NOTE: Ignition
control may have to be reset after this portion
of the test.
10. To restart system, follow lighting instructions in
Section E.
11. 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.
12. Check that the heater is cycled with the thermostat.
Raise the setting on the thermostat to the highest
setting and verify that the heater goes through the
normal start-up cycle. Reduce to the lowest setting
and verify that the heater goes off.
13. Observe several operating cycles for proper opera-
tion.
14. Set the heater thermostat to desired temperature.
15. Review all instructions shipped with this heater
with owner or maintenance person, return to enve-
lope and give to owner or place the instructions
inside front panel on heater.