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Part Number 550-142-302/0520
CGi
SERIES 4 — GAS-FIRED WATER BOILER — Boiler Manual
12
Prepare boiler — placement & setup
2a
Table 2 Manifold orifice sizing at sea level and altitudes to 4,500 feet
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.
Do not drop boiler or bump jacket on
floor or pallet. Damage to boiler can
result.
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 position.
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
Figure 40, item 4, page 64).
2. Check for correctly-sized manifold orifices. See
Table 2
for sizing. (The orifice size is stamped on the orifice
spud barrel.)
Correctly-sized manifold orifices must
be used. Failure to do so will result in
severe personal injury, death or sub-
stantial property damage.
3. Reinstall burner shield.
Do not operate boiler without
burner shield in place. Failure
to do so could result in severe
personal injury, death or sub-
stantial property damage.
Orifice replacement
procedure
(when required)
1. Remove the screws securing the burner shield
and remove burner shield.
2. Using a
7
/
16
” open-end wrench, remove the
burner orifices from the manifold.
3. Apply a small amount of pipe dope to each of
the new orifices and install in the manifold us-
ing a
7
/
16
” open-end wrench. Make sure the ori-
fices are aligned correctly, not cross-threaded
in the manifold tappings.
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 personal injury,
death or substantial property
damage.
4. Carefully replace the burner shield.
5. Follow the check-out procedure, Section
8
page 36, to assure the boiler is now operating
properly after orifices are replaced.
Location Boiler model
number
Natural gas Propane gas
0-2,000 ft. over 2,000 ft. 0-2,000 ft. over 2,000 ft.
U. S.
CGi-25 2.30 mm
(Note 1)
#54
(Note 1)
CGi-3 and CGi-5 2.55 mm 1.60 mm
CGi-4, CGi-6 - CGi-8 2.70 mm 1.65 mm
Canada
0-2,000 ft. 2,000-4,500 0-2,000 ft. 2,000-4,500
CGi-25 2.30 mm #44 #54 #55
CGi-3 and CGi-5 2.55 mm #41 1.60 mm 1.45 mm
CGi-4, CGi-6 - CGi-8 2.70 mm #38 1.65 mm #53
Note 1:
For elevations above 2,000 feet, contact your local Weil-McLain sales office for details.
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