Operating instructions

Location
Natural gas Propane gas
U.S.
Sea level –
2,000 ft
2.00 mm
over
2,000 ft
(Note 1)
Sea level –
2,000 ft
1.30 mm
over
2,000 ft
(Note 1)
Canada
Sea level –
2,000 ft
2.00 mm
2,000 –
4,500
#49
Sea level –
2,000 ft
1.30 mm
2,000 –
4,500
#56
Note1:ForU.S.elevationsabove2,000feet,contactyourlocalsupplierfor
details.
6
Part Number 550-142-784/0812
GWA Series 2 Gas-Fired Water Boilers – Boiler Manual
Air openings continued
2 Prepare boiler
Place boiler/crate near position
1. Leave boiler in crate and on pallet until installation site is
ready.
2. Moveentirecrateandpalletnexttoselectedlocation.
3. Remove crate. Leave boiler on pallet.
4. Removeboilerfrompalletasfollows:
a. Tiltleftsideofboilerupandplaceaboardunderleftlegs.
b. Tilt boiler the other way and place a board under right legs.
c. Slideboilerbackwardsoffpalletandintoposition.
 Donotdropboilerorbumpjacketonoororpallet.
Damage to boiler can result.
5. Checklevel.
a. Shimlegs,ifnecessary.
b. Do not alter legs.
Placement and setup
 Correctly-sized manifold orices must be used.
Failure to do so will result in severe personal injury,
death or substantial property damage.
3. Levelandstraightenburners.
Burners must be properly seated in slots in burner
restwiththeiropeningsfaceup.Mainburnerorices
mustinjectdowncenterofburner.Failuretoproperly
seat burners will result in severe personal injury,
death or substantial property damage.
4. Reinstall access panel.
Do not operate boiler without access panel secured
in place. Failure to comply could cause momentary
amerolloutonignitionofmainame,resultingin
possible fire or personal injury hazard.
Inspect orifices and burners
1. Removefrontjacketdoor.Removebaseaccesspanel(See
Figure 19, item 4, page 40).
2. Checkfor correctly-sizedmanifold orices. SeeTable3 for
sizing. (The orifice size is stamped on the orifice spud barrel.)
Exhaust fans and air movers
The appliance space must never be under a negative pressure.
Always provideair openings sized not only to the dimensions
requiredfortheringrateofallappliances,butalso to handle
theairmovementrateoftheexhaustfansorairmoversusingair
fromthebuildingorspace.
Motorized air dampers
Iftheairopeningsarettedwithmotorizeddampers,electrically
interlockthedamperto:
• Preventtheboilerfromringifthedamperisnotfullyopen.
• Shuttheboilerdownshouldthedampercloseduringboiler
operation.
Toaccomplishthisinterlock,wireanisolated contact (proving the
damper open) in series with the thermostat input to the boiler.
Theboilerwillnotstartifthiscontactisopen,andwillshutdown
should it open during operation.
The boiler contains ceramic fiber and fiberglass
materials.Usecarewhenhandlingthesematerials
per instructions on page 39ofthismanual.Failure
to comply could result in severe personal injury.
1 Prepare boiler location continued
Table 3 Manifold orice sizing