18-CD24D1-2 3
Installer’s Guide
Safety Section 2
Installation Instructions 4
General 4
Location and Clearances 4
Outline Drawings 6
Upflow Installation 7
Horizontal Installation 7
Air For Combustion and Ventilation 9
Duct Connections 10
General Venting 12
Venting Routed Through a Masonry Chimney 12
Field Wiring Diagrams 14
Electrical Connections 19
Gas Piping 19
Combustion and Input Check 21
High Altitude Derate 22
Start-up and Adjustment 23
Preliminary Inspections 23
Lighting Instructions 23
Sequence of Operation 24
Control and Safety Switch Adjustments 24
Conditions Affecting System Operation 26
Whole House Air Cleaner Maintenance 26
IFC Error Flash Codes 28
Checkout Procedure 30
Contents
CAUTION
!
To prevent shortening its service life, the Furnace
should not be used as a “Construction Heater” during
the finishing phases of construction until the require-
ments listed in item 9, a-i of the safety section of this
publication have been met. Condensate in the pres-
ence of chlorides and fluorides from paint, varnish,
stains, adhesives, cleaning compounds, and cement
create a corrosive condition which may cause rapid de-
terioration of the heat exchanger.
CAUTION
!
Chemicals used to during construction may cause
damage to the COLLECTION CELL.
WARNING
!
DO NOT USE SEMI-RIGID METALLIC GAS CONNEC-
TORS (FLEXIBLE GAS LINES) WITHIN THE FURNACE
CABINET.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
8. A gas-fired Furnace for installation in a residential
garage must be installed as specified in “Location
and Clearances” section (page 4) , of these instruc-
tions.
9. The Furnace may be used for temporary heating of
buildings or structures under construction
only
when the following conditions have been met:
a. The Furnace venting system must be complete
and installed per manufacturers instructions.
b. The Furnace is controlled only by a room Com-
fort Control (no field jumpers).
c. The Furnace return air duct must be complete
and sealed to the Furnace.
d. The Furnace input rate and temperature rise
must be verified to be within nameplate mark-
ing.
e. 100% of the Furnace combustion air require-
ment must come from outside the structure.
f. The Furnace return air temperature range is
between 55
0
and 80
0
Fahrenheit.
g. Clean the Furnace, duct work, and components
upon substantial completion of the construction
process, and verify Furnace and whole house
air cleaner operating conditions including igni-
tion, input rate, temperature rise and venting,
according to the manufacturer's instructions.
h. Remove the Whole House Air Cleaner and
store in a clean, dry location during the
construction process. To be reinstalled when
construction is complete. See page 27 for proper
air cleaner removal.
i. An external field supplied air filter must be
used during construction.
10. This product must be gas piped by a Licensed
Plumber or Gas Fitter in the Commonwealth of
Massachusetts.
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