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Finned copper tube gas boilers & water heaters – Boiler Manual
26
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The following start-up procedure assumes that all
water piping, gas piping and electrical connections
are correct as stated in this manual and the installation
meets all State, Local, and City codes.
See the Futera XLF Control IOM for troubleshooting
information and control operation.
OPERATING INSTRUCTIONS
Operating instructions
1. If, at any time, the boiler will not operate properly, follow the
instructions "TO TURN OFF GAS TO APPLIANCE," page 28,
and call your service technician or gas supplier.
2. Turn off all electrical power to the boiler.
3. Close main gas shut-off valve (fi eld supplied), Figure 16, page 22.
4. Purge the gas piping up to the boiler's manual gas valve (located
ahead of the main gas valve). When the bleeding is complete,
check all gas joints up to the gas valve for leaks.
5. Wait fi ve (5) minutes to clear out any gas.
6. Make sure all limits, pressures switches and safety device contacts
are closed.
7. Open the main gas shut-off valve.
8. Disable any external call for heat, such as from a building
management system or remote operating controller.
9. Toggle the remote/local switch (in control cabinet — see
Figure 18) to
REMOTE
.
10. Turn on electrical power to the boiler.
11. Turn the power switch on the front of the boiler control cabinet
to
ON
.
12. Th e HeatNet display will light up when the power is on. If all
interlocks are properly closed, the display will say
STANDBY
. If
not, refer to the XLF HeatNet Control IOM for troubleshooting.
13. Slide the HeatNet control's low fi re switch (on HeatNet control
board) to the
LOW FIRE
position.
14. Th e boiler will begin the start-up sequence.
15. Allow the boiler to pre-purge and enter the pilot ignition cycle.
16. If pilot lights (indicated by a good fl ame signal 5.0 V DC) proceed
to step 18. (See Honeywell R7800 literature for use of a meter to
check fl ame signal if keypad readout is not available.)
17. If pilot is unstable (indicated by a low or erratic flame signal
causing pilot fl ame failure), toggle the low fi re switch to
DISABLE
,
then back to
ENABLE
to start another cycle (reset the Honeywell
control if necessary). Repeat for one or two more times to ensure
the pilot line is purged of all air. If pilot is still unstable, the pilot
gas pressure may need to be increased. See step 18.
18. Pilot pressure adjustment:
a. Switch the Honeywell control to
TEST
position within the
fi rst 10 seconds of the pilot ignition sequence.
b. Connect one side of a manometer or pressure gauge to the
manometer pressure port (barbed) on the pressure test manifold
(located inside control panel). See Figure 18. Leave the other
side of the manometer open to the room. DO NOT connect
it to the reference port (left side of panel).
Figure 18
Manometer connections to the test manifold (in
control cabinet)
c. Measure pilot gas pressure by pressing and holding the
service valve marked
PILOT GAS
.
d. Set pilot gas pressure to 3.0 inches w.c. (± 0.5 inch) by
adjusting the pilot gas pressure regulator, inside the air box.
Access from the boiler top cover. See Figure 19.
Figure 19
Access to air trim adjustment and pilot regulator
e. Check pilot air pressure using service valve marked
PILOT
AIR
.
f. Pilot air pressure should be 0.60 inches w.c. (± 0.10 inches).
Combustion readings must be in the range specifi ed
in the following instructions. Adjust the boiler as
necessary to ensure proper combustion.
