Ratings; Ignition System Model Suffixes - Weil-McLain Gold CGa Installation And Maintenance Instructions Manual

GOLD CGa Gas-Fired Water Boiler — Boiler Manual
13b

Ratings

Boiler Input DOE
model (Btuh) Heating
number capacity
(Btuh)
(Note 1) (Note 2)
CGa-25 52,000 44,000
CGa-3 70,000 59,000
CGa-4 105,000 88,000 105,000
CGa-5 140,000 117,000 140,000 117,000 126,000 105,000 102,000
CGa-6 175,000 146,000 175,000 146,000 157,500 131,000 127,000
CGa-7 210,000 175,000 210,000 175,000 189,000 157,000 152,000
CGa-8 245,000 204,000 245,000 204,000 220,500 183,000 177,000
1. See Table 7 for available pilot systems. The suffix shown in the table is added to the boiler model number. (Not
available for millivolt systems.)
Notes
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 loads.
Table 7 Ignition system model suffixes
Install CGa boilers for residential radiant panel systems, converted gravity heating systems or other low water
temperature applications per instructions in this manual to avoid damage due to condensation.
CGa boilers are CSA design certified for installation on combustible flooring.
CGa boilers are ASME rated for 50 psig working pressure.
Part Number 550-101-009/0107
0–2,000 feet 2,000–4,500 feet
altitude altitude
Input Output Input
(Btuh) (Btuh) (Btuh)
52,000 44,000 46,800
70,000 59,000 63,000
88,000 94,500
Net Boiler
I=B=R water
ratings content
(Btuh) (gallons)
Output
(Btuh)
(Note 3)
39,000 38,000 1.5
53,000 51,000 1.5
79,000 77,000 2.1
2.7
3.3
3.8
4.4
Pilot ignition system
Standing pilot
Spark-ignited pilot
DOE
Seasonal efficiency
(% A.F .U.E) breeching
SPDN SPDL PIDN
81.5 83.3 84.0 4"I.D. x 20'
81.6 83.7 84.0 4"I.D. x 20'
81.7 83.7 84.0 5"I.D. x 20'
81.8 83.7 83.5 6"I.D. x 20'
81.9 83.6 83.2 6"I.D. x 20'
82.0 83.6 83.0 7"I.D. x 20'
82.1 83.6 82.7 7"I.D. x 20'
Natural gas Propane gas
SPDN SPDL
PIDN Not available
DOE
Chimney
and
size