Weil-McLain CGi Series 3 Installation And Maintenance Manual page 69

CG i
GAS-FIRED wATER BOILER- sERIEs 3 -
Boiler Manual
13b
Ratings
LSJ
~I.IDI
.,.. •••II
CERTIFIED,.
c
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Table 11 Boiler ratings
Boiler
model
number
(Note 1)
CGi-25
CGi-3
(Note 5)
CGi-4
(Note 5)
CGi-5
CGi-6
CGi-7
CGi-6
Notes
NO TICE
DOE
Net AHRI
Boiler DOE
Heating
0 - 2,000 feet 2,000 - 4,500 feet
ratings
water Seasonal
Vent size
capacity
altitude altitude
(Btuh)
content e1Ticlency
(Btu h)
(gallons) (%AFUE)
(Note 21
Input Output
Input Output
(Note
3J
(Note5) (Note4)
(Btuh) (Btuh) (Btuh) (Btuh)
42,000
50,000
42,000 45,000 38,000 37,000
1.5 84.0 3"
51,000
60,000 51,000
60,000 5 1,000 45,000
1.5 85.1 3"
76,000
90,000
76,000 81,000
68,400 66,000 2. 1 85.0 3"
100,000 119,000 100,000
120,000
101,000 87,000 2.7 83.3 3"
140,000
167,000 140,000
150,000
126,000 122,000 3.3 83.3 3"
167,000 200,000 167,000
180,000
150,000 145,000 3.8 83.0 3"
194,000
233,000 194,000
2 10,000
175,000 169,000 4.4 82.7 3"
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 AHRI ratings are based on net Installed radiation of sufficient quantity for the requirements of
the building and nothing need be added for normal p iping and pickup. Ratings are based on a pip-
ing and pickup allowance of 1.15. An additional allowance should be made for unusual piping and
pickup loads.
4. CGi boilers require special venting , consistent with Category I or Ill 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 d iameter when chimney draft venting.
5. As an Energy Star Partner, Well-Mclain has detennlned that the CGI-3
&
4 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.
Part Number 550-142-780/0712
69