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All installations and services must be performed by qualified service personnel.
5
#10-32 x ½ green ground screw
300109
1
#10-32 hex nut
300110
1
3/16” dia. star washer
300270
1
Grounding instructions
MG-966
1
Wire nut
300132
2
3” stainless steel hose clamp
300276
2
J-box wire bushing
350016
1
Drain hose grommet
350446
1
Spring clamp, 11/16”
300299
3
Installation
notice
MG-987 1
PVC tee assembly, 2 x 3” dia.
320817
1
PVC tee assembly, 2” dia.
320819
1
Pipe 2” dia. PVC 15”
14401
1
Bracket
14406 1
Reducer 2” x 3” PVC
320067
1
Orifice, Propane
380039
4/5
Conversion Kit, Propane
380605
1
III. GENERAL INSTALLATION
This furnace is equipped with orifices size for operation with natural gas. For conversion to Propane Gas see
instruction in Gas Conversion Section of this manual.
These Category Type IV furnaces are shipped completely assembled and wired (internally). See the Dealer
Receiving and Freight Claim Procedure Section of the price guide for parts shortage or damage. The furnace and
duct system must be adjusted to obtain a temperature rise of 55°F to 85°F through the furnace after installation. (See
rating label located on side panel inside the furnace vestibule). The installation must conform with local codes, or in
the absence of local codes, with the National Fuel Gas Codes (ANSI Z223.1 or latest edition) and with these
instructions.
: This furnace is not to be used for temporary heating of buildings or structures under construction.
Many of the chemicals used during construction, when burned, form acid bearing condensate that can substantially
reduce the life of the heat exchanger.
A. CODES AND CLEARANCES
The following items must be considered when choosing the size and location of the furnace.
1. All local codes and/or regulations take precedence over the instructions in this manual and should be followed
accordingly. In the absence of local codes, installation must conform with these instructions, regulations of the
National Fire Protection Association, provisions of National Electrical Code (ANSI/NFPA70 or latest edition),
and the National Fuel Gas Code (ANSI Z223.1 or latest edition).
2. The BTU output capacity of the furnace proposed for installation should be based on a heat loss calculation
made according to the manuals provided by the Air Conditioning Contractors of America (ACCA) or ASHRAE.
3. MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
TABLE 1
MODEL NO.
FROM SIDES OF
FURNACE & REAR
FRONT
TOP OF
PLENUM
FROM THE
FLUE OR VENT
SIDE OF
PLENUM
CHB1-50
0 IN.
6 IN.
0 IN.
0 IN.
1 IN.