506794-01
Page 3 of 16
Issue 1243
Installation
This furnace is not approved for installation in a mobile
home. Do not install this furnace in a mobile home.
Installation in a mobile home could result in actions that
could cause property damage, personal injury, or death.
WARNING
Read all instructions before starting work so installation
will conform to Underwriter’s Laboratories or Canadian
Standards Association requirements. The furnace must be
level when placed on its foundation (
upflow, counterflow
,
and basement models) or in its suspended position
(horizontal models). Using a carpenter’s level, check the
furnace in at least two directions. The weight must be
distributed evenly before the duct work is attached.
These instructions must be placed on or near the
furnace in a conspicuous place.
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
Locate the furnace as centrally as possible so that all warm
pipes to the various rooms are nearly the same length. This
allows each room to receive an equal and proper amount
of heat. This may vary with each particular installation.
Position the furnace so the pipe connection to the chimney
will be of minimum distance and have a minimum of fittings.
In utility rooms or similar installations, the door or access
opening should be large enough to permit replacement of
the furnace, or another appliance such as a water heater,
without disturbing any other equipment.
In any installation where damage from oil may occur,
a drain pan must be installed. The drain pan must be
large enough size to completely prevent any potential
oil damage. The drain pan piping must be sized to drain
the oil pump capacity and the piping must be routed to
drain the oil back to the oil tank.
WARNING
Clearances
A minimum of 24” is recommended in front of the furnace
for servicing the burner on all models.
See Table 1 for a complete listing of the minimum clearances
required for basement type and upflow installations.
See
Figure 2 for the minimum clearances required for horizontal
installations and Figure 3 for the minimum clearances
required for counterflow installations.
When accessibility
clearances are greater than fire protection clearances,
the accessibility clearances take precedence.
Basement Type Units
Hi-Boy (Upflow)
L83BF, L83BR*
L83UF
57/72 - 84/95
112/125
57/72 - 84/95
112/125
Top of Plenum and Duct Work
2”
2”
2”
2”
Plenum Sides
3”
3”
3”
3”
Furnace Sides
6”*
6”**
0”
0”
Furnace Rear
24”
24”
0”
0”
From Front Door
4”
4”
4”
4”
Flue Pipe Clearance to Combustibles**
9”
9”
6”
6”
Type of Floor
Comb.
Comb.
Comb.
Comb.
Combustion Air Openings (2 required)
10” x 20”
11” x 22”
10” x 20”
11” x 22”
* A passage, suitable for a large person, shall be provided between the furnace and chimney for inspection or replacement of the flue
connector when necessary. A clearance of 24” shall be allowed at the rear and on the side of the furnace for service and cleaning of
the blower.
** The minimum clearance shown to the flue pipe may be reduced by using special protection permitted by local building codes and
National Fire Protection Association Standards and CSA 139.
Table 1. Minimum Clearances to Combustibles
