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.
These 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.
1. Disconnect all power to the furnace. Multiple disconnects
may be required. DO NOT TOUCH THE CONTROL OR
ANY WIRE CONNECTED TO THE CONTROL PRIOR
TO DISCHARGING YOUR BODY’S ELECTROSTATIC
CHARGE TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the
furnace chassis which is close to the control. Tools held
in a person’s hand during grounding will be satisfactorily
discharged.
3. After touching the chassis, you may proceed to service
the control or connecting wires as long as you do
nothing to recharge your body with static electricity (for
example; DO NOT move or shuffle your feet, do not touch
ungrounded objects, etc.).
4. If you touch ungrounded objects (and recharge your body
with static electricity), firmly touch a clean, unpainted
metal surface of the furnace again before touching
control or wires.
5. Use
this
procedure
for
installed
and
uninstalled
(ungrounded) furnaces.
6. Before removing a new control from its container,
discharge your body’s electrostatic charge to ground
to protect the control from damage.
If the control is
to be installed in a furnace, follow items 1 through 4
before bringing the control or yourself in contact with
the furnace. Put down all used and new controls before
touching ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
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,
electrical, 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 26 for the
appropriate item number.
Table 2 – Minimum clearance
Position
Clearance in (mm)
Rear
0
Front
1
24 (610)
All sides of supply plenum
2
1 (25)
Sides
3
0
Vent
0
Top of furnace
1 (25)
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.
8
Summary of Contents for C105-2-V
Page 24: ...Figure 29 Direct vent clearance 23 ...
Page 25: ...Figure 30 Other than Direct vent clearance 24 ...
Page 32: ...Figure 31 Dimensions 31 ...
Page 33: ...Figure 32 Two Stage ECM Wiring diagram 32 ...
Page 36: ...Figure 33 Exploded view Cxx 2 V part 1 35 ...
