# 45466K003
Page 3
INSTALLATION
These instructions must be placed on or near the
furnace in a conspicuous place.
The furnace design is certified by CSA International as a
Category IV furnace in compliance with the latest edition
of American National Standard Z21.47/CSA Standard 2.3
for Gas-Fired Central Furnaces, for operation with natural
gas or propane. Consult the rating plate on the furnace for
gas type before installing.
The maximum hourly heat loss of space shall be calcu-
lated in accordance with the procedure described in the
current manuals of Air Conditioning Contractors of
America, or by any other recognized method which is
suitable for local conditions, provided the results obtained
are in substantial agreement with, and not less than, those
obtained using the procedure described in the manuals.
G1D91BU, G1D93BU, and CG90UB models shall be
installed only as
upflow
furnaces. G1D93BC and
CG90CB models shall be installed only as
counterflow
(downflow) furnaces.
Inspection of Shipment
This furnace is shipped in one package, completely
assembled and wired.
The thermostat is shipped in a
separate carton when ordered.
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier
’
s freight bill. Damage claims should be filed
with the carrier immediately. Claims of shortages should
be filed with the seller within 5 days.
Location
To provide proper operation and satisfactory performance,
care must be taken in choosing the location for this furnace.
The atmosphere in which the furnace operates must be free
of contaminants such as chlorides and sulfates.
The furnace must be installed so that electrical compo-
nents are protected from water.
Unit must be level for
proper condensate drainage.
All models are suitable for closet or utility room installation.
The furnace is suitable for installation in buildings con-
structed on-site. The furnace should be centralized in
respect to the heat distribution system as much as
practicable. When installed in a utility room, the door
should be wide enough to allow the largest part of the
furnace to enter, or permit the replacement of another
appliance, such as a water heater.
A gas-fired furnace for installation in a residential garage
must be installed so the burner(s) and the ignition source
are located not less than 18" above the floor. The furnace
is to be located or protected to avoid physical damage by
vehicles.
If the furnace is to be installed in an attic or other
insulated space, it must be kept free and clear of
insulating materials.
Clearances
All servicing and cleaning of the furnace can be performed
from the front. If installed in a closet or utility room, provide
18" clearance in front for service if the door to the room is
not in line with the front of the furnace.
Refer to Table 1 on page 4 for the minimum clearances to
combustibles required for construction and proper unit
operation.
Accessibility clearances must take precedence over
fire protection clearances.
Upflow models (G1D91BU, G1D93BU, & CG90UB) may be
installed on wood flooring but shall not be installed directly
on carpeting, tile, or any other combustible material.
Counterflow models (G1D93BC & CG90CB) are certified
for installation on combustible flooring provided a special
base assembly is used. (Refer to the
Duct Connection –
The condensate drain on this furnace is
incorporated within the furnace and must be
primed before start-up.
The condensate
system must not be exposed to tempera-
tures under 32°F.
Use of heat tape is per-
missible provided the rate temperature of the
tape
does not exceed 155°F.
CAUTION
Do not use the furnace as a heater in a
building under construction. The furnace can
be severely damaged due to the abnormal
environment caused by construction. Chlo-
rides from sources such as paint, stain, or
varnish; tile and counter cements; adhesives;
and foam insulation are abundant in a struc-
ture under construction and can be highly
corrosive. Low return air temperature can
cause condensation in the furnace and other
damage that can shorten the life of the unit.
CAUTION
