5
IV - BOILER RATINGS AND CAPACITIES
ings above are for sea level applications. The boiler
automatically derates input at a rate of 2% for every
1000 feet above an elevation of 2000 feet (see Table
2). The boiler will also derate relative to the calorific
value of the gas being used. Use the formula speci-
fied in “Measure The Natural Gas Input Rate” in Sec-
tion VII of the Control Manual and Operating Instruc-
tions (P/N# 240006104) to determine the proper rate
due to derated gas. No alterations to the boiler are
required for altitudes above sea level.
These low pressure gas-fired hot water boilers are
design certified by CSA International, for use with
natural and propane gases. The boilers are con-
structed and hydrostatically tested for a maximum
working pressure of 50 PSIG (pounds per square
inch gauge) in accordance with ASME (American
Society of Mechanical Engineers) Boiler and Pres-
sure Vessel Code Section IV Standards for heating
boilers.
The Boilers are certified in accordance with ANSI
(American National Standards Institute) Z21.13
standards as gas-fired, direct vent, condensing,
hot water boilers.
TABLE 1: SEA LEVEL RATINGS - NATURAL AND PROPANE GASES
Boiler Input Rate
(MBH)(1)
Heating Capacity
(MBH)(1)(2)
Net I=B=R Rating
(MBH)(1)
AFUE(2) Flue Diameter Shipping
Wt.
High Fire 200 190 165 95% 2” CPVC & 3” PVC 284 lbs.
Low Fire 80 76 66
(1) 1 MBH = 1,000 Btuh (British Thermal Units Per Hour)
(2) Heating Capacity and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Department of Energy) test procedures.
TABLE 2: 95M-200 HIGH ALTITUDE DERATE CHART
Boiler Input
Rate (MBH)
Altitude (In Feet)
3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000
High Fire 196 192 188 184 181 177 174 170
Low Fire 78.4 76.8 75.3 73.8 72.3 70.9 69.5 68.1
The Heating Capacity indicates the amount of heat
available after subtracting the losses up the stack.
Most of this heat is available to heat water. A small
portion is heat loss from the jacket and surfaces of
the boiler, and it is assumed that this heat stays in
the structure. The Net I=B=R Rating represents the
portion of the remaining heat that can be applied
to heat the radiation or terminal units (i.e., finned
tube baseboard, cast iron radiators, radiant floor,
etc.) The difference between the Heating Capacity
and the Net I=B=R Rating, called the piping and
pickup allowance, establishes a reserve for heating
the volume of water in the system and offsetting
heat losses from the piping. The Net I=B=R Rat-
ings shown are based on a piping and pickup factor
of 1.15 in accordance with the I=B=R Standard as
published by the Hydronics Institute. The Net I=B=R
Rating of the boiler selected should be greater than
or equal to the calculated peak heating load (heat
loss) for the building or area(s) served by the boiler
and associated hot water heating systems. The
manufacturer should be consulted before selecting
a boiler for installations having unusual piping and
pickup requirements.
V - BEFORE INSTALLING THE BOILER
Review the following before installing the boiler.
CODES
This boiler product is a gas-fired, direct vent, con-
densing boiler and must be installed in accordance
with all applicable federal, state and local building
codes including, but not limited to the following:
United States - Installation shall conform with
National Fuel Gas Code (NFPA-54/ANSI Z223.1-
latest edition)
Canada - Installation shall be in accordance with
CSA-B149.1 and .2 installation codes.
Where required by the authority having jurisdiction,
the installation must conform to the ASME Safety
Code for Controls and Safety Devices for Automati-
cally Fired Boilers, No.CSD-1.
The installation must conform to the requirements
of the authority having jurisdiction or, in the ab-
sence of such requirements, to the National Fuel
Gas Code, ANSI Z223.1 - latest revision.
