Weil-McLain GV90+ - Manual (Page 64)

Part number 550-142-054/0411
GV90+
gas
-
fired water boiler
— Boiler Manual
64
Start-up
(continued)
Final checklist
Use the checklist following to ensure boiler is
operating correctly.
Have the following been completed?
❏ ❏ Is proper orifice plate installed? Refer to page 8 to check size and
fuel type.
Proper orifice plate must be used. Failure to do so will
cause severe personal injury, death or substantial prop-
erty damage.
❏ ❏ Thermostat heat anticipator (if available) set properly? Refer to
Field wiring, page 56.
❏ ❏ Read and followed all procedures and checks specified in the Start-
up section, beginning with page 59?
Perform the following
❏ ❏ Inspect vent system for leaks. Verify vent (and air) piping are
functional and unobstructed.
❏ ❏ Measure natural gas input:
a. Operate boiler 10 minutes.
b. Turn off other appliances.
c. At natural gas meter, measure time (in seconds) required to
use one cubic foot of gas.
d. Calculate gas input:
3600 x 1000
number of seconds from step c
= Btuh
e. Btuh calculated should approximate input rating on boiler
rating label.
❏ ❏ Test limit control — While burner is operating, move indicator
on limit control below actual boiler water temperature. Blower
and burner should go off while circulator continues to operate.
Raise setting on limit control above boiler water temperature and
burner should reignite.
❏ ❏ Test additional field-installed controls — If boiler has a
low water cutoff, additional high limit or other controls,
test for operation as outlined by manufacturer. Burner
should be operating and should go off when controls
are tested. When controls are restored, boiler should
restart.
❏ ❏ Test ignition system (integrated boiler control):
f. Connect voltmeter to gas valve terminals.
g. Turn off manual gas valve.
h. Set thermostat to call for heat.
i. IBC will begin purge cycle, then activate igniter.
Igniter will glow for approximately 20 seconds.
Near end of 20 seconds, 24 VDC will show at gas
valve for approximately 6 seconds and then return
to 0 VDC. Control will attempt ignition two more
times, increasing igniter time to 30 seconds for these
attempts. The control will then lockout, flashing the
POWER and FLAME lights.
j. To restart system, follow Operating instructions on
boiler (also Figure 76, page 66). (Control will reset
after power has been off for at least 45 seconds.)
❏ ❏ Set limit control(s) to system temperature requirements.
Adjust balancing valves and controls to provide design
temperature to system.
❏ ❏ For multiple zones, adjust flow so it is about the same
in each zone or as required.
❏ ❏ Cycle boiler with thermostat — Raise to highest setting
and verify boiler goes through normal start-up cycle.
Lower to lowest setting and verify boiler goes off.
❏ ❏ Observe several operating cycles for proper operation.
❏ ❏ Set room thermostat to desired room temperature.
❏ ❏ Fill in Installation and service certificate (see back cover
of manual).
❏ ❏ Review all instructions shipped with this boiler with
owner or maintenance person. Return instructions to
envelope and give to owner or place in pocket inside
front panel in boiler.