pr=-I RLESS o
CAST IRON BOILERS
Series 61
o Residential Gas Boilers
• Packaged or Knockdown
o Natural Draft Venting
o Standing Pilot or
Spark Ignition
Q Steam or Hot Water Boilers
o Natural or LP Gas
Water
Steam
Q This large water content boiler
installsin difficultsteam or water
applications.
o AFUE ranges from 76.8%
(standing pilot) to 80.7% (spark
ignition) on steam boilers and
80,3% to 81.7% (spark ignition
only) on water boilers, significantly
exceeding the federal standards
for residential boiler efficiency.
o Low profile design ideal for boiler
installationsin areas with a low
ceiling.
An optional tankless domestic
hot water coil can be installed on
hot water boilers, insuringample
domestic hot water production.
o Probe or float-type lowwater
cutoff available.
DOE
Heating Capacity
MBH--
Stdg.PilotwlDamper
Seasonal Efficiency
(AFUE)4
Net I=B=R Ratings 3
Steam Steam Water
Sq. Ft. MBH 2 MBH 1
225 54 63
304 73 85
4O4 97 113
504 121 140
604 145 168
704 169 196
Spark Ign. wlDamper
Seasonal Efficiency
(AFUE) 4
Water Content
(GaL)
I A,G.A.
I Input
N MBH Water Steam Water I Steam Water I Steam Water Steam
90 73 72 N/A I 76.8 80.5 I 80.6 8.16 4.80
120 98 97 N/A I 77.7 81.7 I 80.7 10.32 5.88
160 130 129 N/A I 77,8 81.3 I 80.6 12.48 6.96
200 I 161 161 N/A I 78.0 81.0 I 80.6 14.64 8.04
240 193 193 N/A I 78.1 80.6 I 80.6 16.80 9.12
280 225 225 N/A I 78.3 80.3 I 80.6 18.96 18.20
1 Net I=B=R water ratings based on an allowance of 1.15,
2 Net I=B=R steam ratings based on an allowance of 1.333.
3 Consult factory before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping
systems, etc.
4 Heating Capacity and Annual Fuel Utilization Efficiency (AFUE) ratings are based on U.S. Government test. Before purchasing this appliance, read important
information about its estimated annual energy consumptions or energy efficiency rating that is available from your retailer.
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