Weil-McLain Gold CGi 2 Series Manual page 66

CGi
GOLD GAS-FIRED WATER BOILER — SERIES 2 —
13b
Ratings
Table 10 Boiler ratings
DOE
Boiler
Heating
model
capacity
number
(Btuh)
(Note 1) (Note 2)
CGi-25 42,000
CGi-3
51,000
(Note 5)
CGi-4
85,000
CGi-5 100,000
CGi-6
140,000
CGi-7 167,000
CGi-8 194,000
1. Add "PIN" for natural gas boiler - "PIL" for Liquefied Petroleum (propane) gas boiler.
2. Based on standard test procedures prescribed by the United States Department of Energy.
3. Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of
the building and nothing need be added for normal piping and pickup. Ratings are based on a piping
and pickup allowance of 1.15. An additional allowance should be made for unusual piping and pickup
Notes loads.
4. CGi boilers require special venting, consistent with Category I or III boiler. Use only the vent materials
and methods specified in this manual. Vent diameter shown above is for direct exhaust venting. See
Table 3, page 14, for vent diameter when chimney draft venting.
5.
As an Energy Star Partner, Weil-McLain has determined that the CGi-3 meets the Energy Star guidelines for
energy efficiency.
CGi boilers for residential radiant panel systems, converted gravity heating systems or other low water tempera-
ture applications should be installed with balancing valves and bypass piping equal to the supply and return
size to avoid excessive flue gas condensation due to lower operating water temperatures. For alternate piping,
contact your Weil-McLain sales office. CSA design certified for installation on combustible flooring. Tested for
50 psi working pressure.
66
0 - 2,000 feet 2,000 - 4,500 feet
altitude
Input Output
(Btuh) (Btuh) (Btuh)
50,000 42,000 45,000
60,000 51,000 60,000
100,000 85,000 90,000
119,000 100,000 120,000
167,000 140,000 150,000
200,000 167,000 180,000
233,000 194,000 210,000
Boiler Manual
Net
I=B=R
altitude
ratings
(Btuh)
Input Output
(Note 3)
(Btuh)
38,000 37,000
51,000 45,000
76,000 74,000
101,000 87,000
126,000 122,000
150,000 145,000
175,000 169,000
Boiler DOE
water Seasonal
Vent size
content efficiency
(gallons) (% AFUE)
(Note 5) (Note 4)
1.5 84.0
1.5 85.1
2.1 84.0
2.7 83.3
3.3 83.3
3.8 83.0
4.4 82.7
Part Number 550-110-710/1211
(Note 5)
3"
3"
3"
3"
3"
3"
3"