Weil-McLain CGa 3 Series Manual page 12

CGa Series 3 Gas-Fired Water Boiler — Boiler Manual
2a
Prepare boiler — placement and setup
Place boiler/crate near
position
Leave boiler in crate and on pallet
1.
tion site is ready.
2. Move entire crate and pallet next to selected location.
3. Remove crate.
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 posi-
tion.
5. Check level.
a. Shim legs, if necessary.
b. Do not alter legs.
Inspect orifices and burners
1. Remove front jacket door. Remove base access panel
Figure 32
(See
2. Check for correctly-sized manifold orifices. See
Table 2
on the orifice spud barrel.)
Table 2 Manifold orifice sizing
Location
U.S.
Canada
Location
U.S.
CGa 25
CGa 3-8
Canada
CGa 25
CGa 3-8
Note 1: For elevations above 2,000 feet, contact your
Weil-McLain sales office for details.
12
Leave boiler on pallet.
Do not drop boiler or bump jacket
on floor or pallet. Damage to boiler
can result.
4
, item , page 60).
below for sizing. (The orifice size is stamped
Natural gas
0-2,000 ft. over 2,000 ft.
2.00 mm
0-2,000 ft. 2,000-4,500 ft.
2.00 mm
Propane gas
0-2,000 ft. over 2,000 ft.
#61
#56
0-2,000 ft. 2,000-4,500 ft.
#61
#56
until installa-
3. Level and straighten burners.
4. Reinstall access panel.
Orifice replacement procedure
(when required)
1. Remove access panel.
2. On gas manifold, mark location of main burner with
attached pilot assembly.
3. Remove main burner with attached pilot assembly
from manifold. Remove all remaining burners.
4. Remove and discard all main burner orifices in gas
(Note 1)
manifold.
5. Apply a small amount of pipe dope to each of the
1.90 mm
new orifices and install in the manifold. Make sure
the orifices are aligned correctly, not cross-threaded
in the manifold tappings.
(Note 1)
(Note 1)
.95mm
6. Reinstall main burner with attached pilot assembly
#57
at location marked on gas manifold. Reinstall all
remaining burners.
7. Follow check-out procedure, Section
Correctly-sized manifold orifices
must be used. Failure to do so will
result in severe personal injury,
death or substantial property dam-
age.
Burners must be properly seated in
slots in burner rest with their open-
ings face up. Main burner orifices
must inject down center of burner.
Failure to properly seat burners
will result in severe personal injury,
death or substantial property dam-
age.
Do not operate boiler without ac-
cess panel secured in place. Failure
to comply could cause momentary
flame rollout on ignition of main
flame, resulting in possible fire or
personal injury hazard.
Use only pipe dope compatible with
propane gas, even if boiler is to be
operated on natural gas. Failure to
comply could result in severe per-
sonal injury, death or substantial
property damage.
7
, page 33.
Part Number 550-142-300/0520