Service Manual

ACCESSORIES
15
Vent
Maintain 12" (18" for Canada)
minimum clearance above highest
anticipated snow level. Maximum of
24" above roof.
Combustion Air
Roof Boot/Flashing
(Field Supplied)
Support (Field Supplied)
45 Elbow
(Field Supplied)
Combustion Air
Vent
CONCENTRIC VENT CONVERSION KIT
DCVK (Vertical Installation)
DCVK (Horizontal Installation)
The CVENT-2 (DCVK20) (2") or the CVENT-3 (DCVK-30) (3") is a concentric vent kit approved with furnaces listed in
this manual.
This concentric vent kit allows for vertical or horizontal vent termination. The illustrations give a brief view of the kit and
its application.
See the section in this manual under "Vent Flue and Combustion Air Pipe Terminations" for more information or consult
the Installation and Operating Instructions (IO-619*).
Vent
Combustion Air
Flush to
1" maximum
45 Elbow
(Field Supplied)
Combustion Air
Vent
Strap
(Field Supplied)
AFE18-60A Dual Fuel Accessory
When installing the communicating capable furnace with a
heat pump, the preferred installation would include a com-
municating thermostat. A communicating thermostat pro-
vides control of gas heat and heat pump operation and elimi-
nates the need for a separate dual fuel control. A legacy
dual fuel thermostat could also be used with 24 volt wiring to
control the gas furnace and heat pump. If a communicating
thermostat or legacy dual fuel thermostat are not used, the
AFE18-60A kit must be added to provide control of the equip-
ment. This control is mounted indoors near the furnace and
provides terminals for thermostat, furnace, and heat pump
wiring. The AFE18-60A may be used with or without a sepa-
rate outdoor thermostat.
CFSB17, 21, 24 Counter Flow Base
The CFSB base must be used when installing a *CVC96
furnace in the vertical position on a combustible floor with-
out a coil under the furnace.
LPLP03 Low LP Gas Pressure Shut-off Kit
Installation of the LPLP03 kit is recommended on every L.P.
converted furnace to protect the furnace against low L.P.
gas supply pressure. Low L.P. supply pressure can cause
poor combustion and carbon in the heat exchanger. The
LPLP03 kit will open the electrical circuit to the gas valve in
the event of low supply pressure. The kit contains a pres-
sure switch, gas fittings and electrical harness to connect
the switch in series with the gas valve.
LPM-08 LP Conversion Kit
This furnace is factory equipped to operate on Natural Gas
but may be field converted to operate on L.P. gas. To con-
vert a *MVC96 or *CVC96 furnace to operate on L.P. gas,
the LPM-08 conversion kit must be used. The LPM-08 kit
contains a set of 1.25 mm orifices to replace the factory
installed natural gas orifices and a set of springs to convert
the gas valve to L.P. gas.
OT18-60A Outdoor Thermostat
For use in a legacy dual fuel installation to lock-out the heat
pump at a selected temperature.