2.2 ELECTROSTATIC DISCHARGE
CAUTION
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit
component damage. Electrostatic discharge can
affect electronic components. Take precautions
during furnace installation and servicing to
protect the furnace electronic control.
precautions will help to avoid exposing the control
to electrostatic discharge by putting the furnace,
the controls, and the technician at the same
electrostatic potential.
2.3 LOCATION
This furnace must :
• Be installed so the electrical components are
protected from water;
• Not be installed directly on any combustible
material other than wood flooring;
• Be located close to the chimney or vent and
attached to an air distribution system. Refer to
section 7
Place the unit so that proper venting can be achieved,
with a minimum number of elbows, in accordance with
the instructions in this manual. The furnace should be
located as close to the chimney (vertical venting) or to
the outside vent wall (horizontal venting) as possible.
When installing the furnace, provisions must be made
to ensure the supply of adequate combustion and
ventilation air in accordance with the "air for combustion
and ventilation" section of the National Fuel Gas Code,
NFPA 5/ANSI Z223. c1 or applicable provisions of the
local building code.
2.3.1
Clearance and accessibility
Installations must provide ample space for servicing and
cleaning. Always comply with minimum fire protection
clearances shown in table 2 or on the furnace rating
label. Clearances must also accomodate an installation's
gas connection (to the left of the furnace), electrical
connection, drain trap and venting/combustion air piping.
If the combustion air is installed to the side of the furnace,
additionnal clearance must be provided.
2.3.2
Location relative to cooling
equipement
The cooling coil can either be installed in the supply air
duct or in the return air duct. If the coil is installed in
the supply air duct, it must be at a minimum of 6" over
the furnace's primary heat exchanger. This will avoid
potential error codes due to heated refrigerant when the
gas furnace is on. It also allows for a more laminar
airflow through the coil. The cooling coil base can be
purchased through your local distributor. See table 24 for
the appropriate item number.
Position
Rear
1
Front
All sides of supply plenum
These
3
Sides
Vent
Top of furnace
1- For servicing or cleaning, a 24" front clearance is
required.
2- For at least the first 3 ft of plenum from furnace
3-Unit connections (electrical, drain trap and combustion
air) may necessitate greater clearances than the
minimum clearances listed above.
3 INSTALLATION
To ensure proper drainage of the condensate when
installed in position other than upflow, the furnace
MUST be tilted. Refer to figures corresponding to the
position of the furnace in the following sections.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in water
spillage and/or property damage.
For
any
multiposition pressure switch must be connected
pneumatically
electrically to the control to allow the furnace
to stop in the event of drain blockage.
3.1 UPFLOW
The furnace is factory built for upflow position. In this
position, the drain trap can be installed on the right or left
side depending on air return duct. When installing the
furnace in the upflow position, make sure it is leveled or
tilted foward.
In the upflow orientation, the drain trap can be installed
to the right or to the left of the furnace. The location of
the drain trap is dependent of the return duct connection.
The furnace must be perfectly leveled or slightly leaned
forward to help drain condensate.
7
Table 2 – Minimum clearance
Clearance in (mm)
2
CAUTION
position
other
than
to
the
condensate
0
24 (610)
1 (25)
0
0
1 (25)
upflow,
the
box
and