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CGi
SERIES 4 — GAS-FIRED WATER BOILER —
2a
Prepare boiler — placement & setup
Place boiler/crate near position
1. Leave boiler in shipping carton and on pallet until
installation site is ready.
2. Move entire shipping carton and pallet next to
selected location.
3. Remove shipping carton.
4. Remove boiler from pallet.
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 backward 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 burner shield
(see
2. Check for correctly-sized manifold orifices. See
Table 2
the orifice spud barrel.)
3. Reinstall burner shield.
Table 2 Manifold orifice sizing at sea level and altitudes to 4,500 feet
Location Boiler model
U. S.
Canada
Note 1:
12
Do not drop boiler or bump jacket
on floor or pallet. Damage to boiler
can result.
, item
, page 64).
Figure 40
4
for sizing. (The orifice size is stamped on
Correctly-sized manifold orifices
must be used. Failure to do so will
result in severe personal injury,
death or substantial property dam-
age.
number
CGi-25
CGi-3 and CGi-5
CGi-4, CGi-6 - CGi-8
CGi-25
CGi-3 and CGi-5
CGi-4, CGi-6 - CGi-8
For elevations above 2,000 feet, contact your local Weil-McLain sales office for details.
Boiler Manual
Orifice replacement
procedure
(when required)
1. Remove the screws securing the burner
shield and remove burner shield.
2. Using a
burner orifices from the manifold.
3. Apply a small amount of pipe dope to each
of the new orifices and install in the mani-
fold using a
sure the orifices are aligned correctly, not
cross-threaded in the manifold tappings.
4. Carefully replace the burner shield.
5. Follow the check-out procedure, Section
page 36, to assure the boiler is now oper-
ating properly after orifices are replaced.
Natural gas
0-2,000 ft.
over 2,000 ft.
2.30 mm
2.55 mm
(Note 1)
2.70 mm
0-2,000 ft.
2,000-4,500
2.30 mm
#44
2.55 mm
#41
2.70 mm
#38
Do not operate boiler with-
out burner shield in place.
Failure to do so could result
in severe personal injury,
death or substantial prop-
erty damage.
/
" open-end wrench, remove the
7
16
/
" open-end wrench. Make
7
16
U s e o n l y p i p e d o p e
compatible with propane
gas, even if boiler is to be
operated on natural gas.
Failure to comply could
result in severe personal
injury, death or substantial
property damage.
Propane gas
0-2,000 ft.
over 2,000 ft.
#54
1.60 mm
(Note 1)
1.65 mm
0-2,000 ft.
2,000-4,500
#54
#55
1.60 mm
1.45 mm
1.65 mm
#53
Part Number 550-142-302/0124
8
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