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I Product Description
The FCM070, FCM090 and FCM120 are aluminum gas fired condensing boilers designed for use in forced
hot water heating systems requiring supply water temperatures of 180°F or less. These boilers are designed for
installation on a wall, however they may be floor mounted using an optional pedestal kit available from U.S. Boiler
Company, Inc. This boiler may be vented vertically or horizontally with combustion air supplied from outdoors.
This boiler is not designed for use in gravity hot water systems or systems containing significant amounts of
dissolved oxygen.
II Specifications
Figure 2.1: General Configuration
TABLE 2.2: SPECIFICATIONS
D.O.E.
MAXIMUM MINIMUM
HEATING
INPUT
INPUT
CAPACITY
(BTU/hr)
(BTU/hr)
(BTU/hr)
IBR NET
RATING
(BTU/hr)
AFUE (%)
WATER
VOLUME
(Gal.)
APPROX.
NET
WEIGHT
(lb)
MODEL*
NO. OF
SECTIONS
FCM070
mono block
70,000
30,000
63,000
55,000
95.4
0.41
102
FCM090
mono block
90,000
30,000
80,000
70,000
94.5
0.41
102
FCM120
mono block
120,000
40,000
107,000
93,000
95.2
0.62
110
* Add suffix “N” for natural gas and “P” for propane. Ratings are the same for both fuels.
TABLE 2.3: MAXIMUM VENT LENGTHS
Using 60/100mm Concentric Vent System Supplied with the Boiler................................................................25 in.
Using Optional 60/100mm Concentric Vent Components:
FCM070 ...................................................................................... 32 ft
FCM090 ...................................................................................... 32 ft
FCM120 ...................................................................................... 18 ft
Using Approved 3” AL29-4C Horizontal Stainless Vent System and Optional Stainless Steel Vent Kit..........55 ft
See Vent Section for additional venting options and requirements
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