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6
8. For horizontal installations, line contact is permissible only
between lines formed by intersection of back and two sides
of furnace jacket, and building joists, studs or framing.
9. Residential garage installations require:
S Burners and ignition sources installed at least 18″ (457.2mm)
above the floor.
S Located or physically protected from possible damage by a
vehicle.
10. Local codes may require a drain pan under the entire furnace
and condensate trap when the furnace is installed in attic
application.
This furnace may be used for construction heat provided that all the
following conditions are met:
S The furnace is permanently installed with all electrical wiring,
piping, venting and ducting installed according to these
installation instructions. A return air duct is provided, sealed to
the furnace casing, and terminated outside the space containing
the furnace. This prevents a negative pressure condition as
created by the circulating air blower, causing a flame rollout
and/or drawing combustion products into the structure.
S The furnace is controlled by a thermostat. It may not be “hot
wired” to provide heat continuously to the structure without
thermostatic control.
S Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause fouling and
plugging of furnace components.
S The temperature of the return air to the furnace is maintained
between 55° F(13° C) and 80° F(27° C) , with no evening
setback or shutdown. The use of the furnace while the structure
is under construction is deemed to be intermittent operation per
our installation instructions.
S The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the rating
plate value.
S The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
S The furnace, ductwork and filters are cleaned as necessary to
remove drywall dust and construction debris from all HVAC
system components after construction is completed.
S After construction is complete, verify furnace operating
conditions including ignition, input rate, temperature rise and
venting according to these instructions.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury
or death.
Do NOT operate furnace in a corrosive atmosphere containing
chlorine, fluorine or any other damaging chemicals, which
could shorten furnace life.
Refer to Combustion & Ventilation Air section, Contaminated
Combustion Air for combustion air evaluation and remedy.
!
WARNING
Furnace Installation Considerations
The installation of the furnace for a given a pplication will dictate
the position of the furnace, the a irflow, ductwork connections, vent
and combustion air piping. Consideration must be given to the
following:
Condensate Trap a nd Drain Lines
The supplied condensate trap must be attached to the furnace side
panel on either the left or right side. For horizontal installations, the
drain trap is vertically attached to the s ide panel below the furnace.
A minimum clearance of 6″ (152.4mm) below the furnace is
required for the condensate trap. Downward slope of the
condensate drain line from the condensate trap to the drain location
must be provided. Adequate freeze protection of the drain trap and
the drain line must be provided. See “Condensate Drain Trap”
section for further details.
Leveling
Proper leveling of the furnace must be provided to insure proper
drainage of the condensate from the furnace. The furnace must be
level to within
1
/
4
″ (6.4mm) from front to back and from side to
side for upflow and downflow installations or top to bottom for
horizontal installations.
Vent and Combustion Air Connections
For venting information literature, contact www.carrier.com with
the complete model and serial number of the furnace.
On the Dual Certified furnace, the vent and combustion air pipes
attach to the furnace through the top panel for the upflow and
horizontal installations. For the downflow installation, the vent and
combustion air pipes attach to the furnace through the alternate
locations on the furnace side panels.
NOTE: On the Direct Vent furnace, the vent pipe attaches to the
furnace through the side panels. The combustion air pipe attaches to
the top panel or to the alternate location on the side panel.
On the Single Pipe furnace, the vent pipe attaches to the furnace
through the furnace side panels.
NOTE: Repositioning of the combustion blower is required for the
vent pipe connection to the furnace through the “right side” panel.
See “Vent and Combustion Air Piping” section for further details.
Horizontal Furnace Installation
Inlet Pipe (not used on Single Pipe model)
Vent
Pipe
Condensate
Trap
NOTE: 6
″
bottom clearance required for condensate trap.
A07703
Fig. 3 -- Typical Horizontal Installation
This furnace can be installed horizontally in an attic, basement,
crawl space, alcove, or suspended from a ceiling in a basement or
utility room (See Fig. 3). Do not install furnace on its back as safety
control operation will be adversely affected.
58HDV