25
Part Number 550-142-320/0720
GWA
Series 3
Gas-Fired Water Boilers –
Boiler Manual
Boiler model
_______________________________________________________________
Series
____________
Consumer Protection number
________________________________
Date installed
________________________
Measured Btuh input
____________
Installer
_______________________ ______________________________ ____________________________
(company)
(address)
(phone)
__________________________________
(Installer’s signature)
Installation and service certificate
Installation instructions have been followed.
Checkout sequence has been performed.
Above information is certified to be correct.
Information received and left with owner/maintenance person.
8 Checkout procedure
o
Boiler and heat distribution units filled with water?
o
Automatic air vent, if used, open one full turn?
o
Air purged from system?
o
Air purged from gas piping? Piping checked for leaks?
o
Correctly-sized manifold orifices installed? See
Table 3,
page 6
, to check size and fuel type.
Correctly sized manifold orifices must be used.
Failure to do so will cause severe personal injury,
death or substantial property damage.
o
Followed “Operating Instructions” on boiler or in Manual
Section 11, pages 29 & 30
for proper start-up?
o
Proper burner flame observed? See “Verify operation”,
Manual
Section 7, page 21
.
o
Test temperature limit — While burners are operating, turn
Boiler Temp adjustment knob counterclockwise until setting
is below actual boiler water temperature. Burners should go
off while circulator continues to operate. Turn Boiler Temp
Adjustment knob clockwise until setting is above boiler
water temperature and ignition sequence should resume.
o
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. Burners should be
operating and should go off when controls are tested. When
controls are restored, burners should reignite.
o
Button on spill switch pushed in?
o
Test ignition system safety device:
Spark-ignited pilot
— Connect manometer to outlet side
of gas valve. Start boiler, allowing for normal start-up
cycle to occur and main burners to ignite. With main
burners on, manually shut off gas supply at manual main
shutoff gas valve. Burners should go off. Open manual
main shutoff gas valve. Manometer should confirm there
is no gas flow. Pilot will relight, flame sensing element
will sense pilot flame and main burners reignite.
o
Set Boiler Temp adjustment knob to system temperature
requirements. Adjust balancing valves and controls to
provide design temperature to system.
o
Set Economy mode, fully clockwise.
o
For multiple zones, adjust flow so it is about the same in
each zone.
o
Verify thermostat heat anticipator (if available) set
properly? See “Field wiring”, Manual
Section 6, page 20
,
“Thermostat”.
o
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.
o
Cycle DHW Aquastat if used.
o
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.
o
Check manifold gas pressure by connecting manometer
to downstream test tapping on main gas valve. Manifold
pressure for natural gas should be 3.5" w.c. and for propane
gas should be 10" w.c.
o
Observe several operating cycles for proper operation.
o
Set room thermostat to desired room temperature.
o
Fill in Installation and service certificate below?
o
Review all instructions shipped with this boiler with owner
or maintenance person. Return instructions to envelope
and give to owner.
