INSTALLATION INSTRUCTIONS Gas Furnace: WFAR
440 01 7104 02 5
Specifications subject to change without notice.
S When lever type gas shutoffs are used they shall be
T--handle type.
S The use of copper tubing for gas piping is not
approved by the state of Massachusetts.
Electrical Connections
S US: National Electrical Code (NEC) NFPA 70--2011
S CANADA: Canadian Electrical Code CSA C22.1
Condensate Drain Connection
US: National Standard Plumbing Code 2009, Section8.7.
Canada: National Plumbing Code of Canada 2010 in
Canada.
ELECTROSTATIC DISCHARGE
(ESD)
PRECAUTIONS
PROCEDURE
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 prevent
electrostatic discharges from personnel and hand
tools which are held during the procedure. These
precautions will help to avoid exposing the control to
electrostatic discharge by putting the furnace, the
control, and the person at the same electrostatic
potential.
CAUTION
!
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 all used and new controls into containers
before touching ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
ACCESSORIES
See Specification Sheets for a list of accessories for this
product.
Table1–Factory--Supplied Installation Parts
DESCRIPTION QUANTITY
Outlet Choke Plate (provided with 40K BTUH furnaces only; see Note) 1
AirIntakePipeFlange 1
Vent Pipe Flange 1
Pipe Flange Gaskets 2
Sharp Tip Screws (Vent and Inlet Flanges) 10
Vent Pipe Coupling 1
Vent Pipe Coupling Clamps 2
Pressure Switch Tube 1
Rubber Drain Elbow 1
Drain Elbow Clamps 4
1 / 2 --- i n . C P V C t o 3 / 4 --- i n . P V C P i p e A d a p t e r 1
Gas Line Grommet 1
Junction Box Cover 1
Junction Box Base 1
Green Ground Screw 1
Blunt Tip Screws (Junction Box) 3
Thermostat Wire Grommet 1
Drain Extension Tube (Z---pipe) (Provided separately in furnace) 1
NOTE: Only used for 40K BTUH furnaces from 0--2000 ft. (0 to 610 M) above sea level for total equivalent vent lengths under 10 ft.
(3 M)
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