Table of Contents
Advertisement
TABLE 1 SEA LEVEL RATINGS - NATURAL AND PROPANE GASES
+ + Heating
Net I =B =R
Shipping
Flue
Model
Input *(MBH)
Capacity
Rating
Weight
Dia.
*(MBH)
*(MBH)
(lbs.)
K90-50
50
45
39
220
2" CPVC & Pvc
K90-75
75
68
59
220
2" CPVC & Pvc
K90-100
100
90
78
220
2" cPVC & Pvc
"1 MBH = 1,000 Btuh
Btuh = British Thermal
Units Per Hour
These low pressure gas-fired hot water boilers are design certified by CSA International
for use with natural
and propane gases. The boilers are constructed and hydrostatically tested for a maximum working pressure of
50 psig (pounds per square inch gage) in accordance with A.S.M.E.
(American Society of Mechanical
Engineers) Boiler and Pressure Vessel Code Section IV Standards for heating boilers.
+ + AFUE
(Annual Fuel Utilization
Efficiency)
and Heating Capacity is based on the D.O.E.
(Department
of Energy) test procedure.
The K90-50,
75 and 100 Boilers are certified
in accordance
with ANSI (American
National
Standards
Institute)
Z21.13 standards
as gas-fired,
direct vent, condensing,
hot water boilers.
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 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
Ratings
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.
BOILERS
FOR USE AT HIGH ALTITUDE
The K90 boilers
are factory equipped
for operation
at altitudes ranging from 0-2,000
feet above sea
level. For use of these boilers
at altitudes
above 2,000 feet above sea level, the gas input ratings
(MBH) must be reduced.
U.S.A.
ONLY:
For altitudes above 2,000 feet above sea level, input ratings should be reduced as
shown in tables 1A, C, & E for natural gas boilers or in tables 1B, D & F for propane
fired boilers.
Reduced
input ratings are achieved by the natural deration
of the gas at higher elevations
and fine
tuned by adjusting
the manifold
pressure.
CANADA
ONLY:
For altitudes in the range of 2,000-4,500
feet above sea level, boilers may be
field equipped
for use at high altitude by using a certified
high altitude conversion
kit.
The change in
main burner orifice size results in a 10% reduction
of the boiler gas input rating (MBH).
Advertisement
Table of Contents
