Specifications

TOTAL
FURNACE
RATING PLATE
INPUT
(BTU/HR)
CM 1206
CANADIAN
HIGH
ALTITUDE
DERATED
INPUT
(BTU/HR)
NUMBER
OF
BURNERS
NATURAL GAS
HEATING VALUE 1075 BUT/CU. FT.
SPECIFIC GRAVITY 0.65/MANIFOLD PRESSURE @ 3.5” W.C.
ELEVATION
0 - 2000’
(USA/
CANADA)
ELEVATION
4000’
(USA ONLY)
ELEVATION
6000’
(USA ONLY)
ELEVATION
8000’
(USA ONLY)
ELEVATION
2000 - 4500’
(CANADA)
40,000 36,000 2 45 47 48 49 5/64 55 55 56 56 3/64
60,000 54,000 3 45 47 48 49 5/64 55 55 56 56 3/64
72,000
N/A 4 5/64 49 50 51 N/A 3/64 57 57 59 N/A
(50 Hz Model)
80,000 72,000 4 45 47 48 49 5/64 55 55 56 56 3/64
90,000
N/A 5 5/64 49 50 51 N/A 3/64 57 57 59 N/A
(50 Hz Model)
100,000 90,000 5 45 47 48 49 5/64 55 55 56 56 3/64
120,000
108,000 6 45 47 48 49 5/64 55 55 56 56 3/64
(50 and 60 Hz)
135,000 121,500 6 44 45 47 48 45 54 55 55 56 55
150,000 135,000 6 42 43 44 45 44 54 55 55 56 54
180,000
N/A 9 45 47 48 49 N/A 55 55 56 56 N/A
(50 Hz Model)
210,000
N/A 9 43 44 45 47 N/A 54 55 55 56 N/A
(50 Hz Model)
210,000
N/A 10 45 47 48 49 N/A 55 55 56 56 N/A
(50 Hz Model)
225,000 202,500 9 42 43 44 45 44 54 55 55 56 54
250,000 225,000 10 42 43 44 45 44 54 55 55 56 54
252,000 225,000 9 40 42 43 44 42 53 54 54 55 54
252,000
N/A 12 45 47 48 49 N/A 55 55 56 56 N/A
(50 Hz Model)
290,000
N/A 14 45 47 48 49 N/A 55 55 56 56 N/A
(50 Hz Model)
300,000 270,000 12 42 43 44 45 44 54 55 55 56 54
330,000
N/A 14 43 44 45 47 N/A 54 55 55 56 N/A
(50 Hz Model)
350,000 315,000 14 42 43 44 45 44 54 55 55 56 54
400,000 360,000 14 40 42 43 44 42 53 54 54 55 54
PROPANE GAS
HEATING VALUE 2500 BTU/CU. FT.
SPECIFIC GRAVITY 1.53/MANIFOLD PRESSURE @ 10.0” W.C.
N/A = Not Applicable
USING CONVERSION KIT CHART III
The following chart should be used to verify the size of all main burner orifices for high altitude derating and natural gas to
propane gas conversions.
Use the furnace nameplate gas INPUT rating, the number of main burners and the altitude of the installation to select the
correct natural gas or propane gas orifice size.
The table is based on manifold pressures of 3.5” W.C. for natural gas and 10” W.C. for propane gas.
IMPORTANT: NEVER ATTEMPT TO INCREASE THE GAS FURNACE FIRING RATE BY USING LARGER ORI-
FICES THAN SPECIFIED. ALTHOUGH FURNACE DIMENSIONS MAY APPEAR SIMILAR,
INTERNAL DIFFERENCES CAN CAUSE POOR COMBUSTION, UNSAFE OPERATING
CONDITIONS, AND PREMATURE EQUIPMENT FAILURE.
ELEVATION
0 - 2000’
(USA/
CANADA)
ELEVATION
4000’
(USA ONLY)
ELEVATION
6000’
(USA ONLY)
ELEVATION
8000’
(USA ONLY)
ELEVATION
2000 - 4500’
(CANADA)
CHART III
MAIN BURNER ORIFICE SIZES
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