SYSTEM OPERATION
12
DRAIN TRAP AND LINES
In horizontal applications the condensate drain trap is secured
to the furnace side panel, suspending it below the furnace. A
minimum clearance of 5 ½” below the furnace must be provid
-
ed for the drain trap. Additionally, the appropriate downward
piping slope must be maintained from the drain trap to the
drain location. Refer to
Condensate Drain Trap and Lines
for
further details. If the drain trap and drain line will be exposed
to temperatures near or below freezing, adequate measures
must be taken to prevent condensate from freezing.
LEVELING
Leveling ensures proper condensate drainage from the heat
exchanger. For proper flue pipe drainage, the furnace must
be level lengthwise from end to end. The furnace should have
a slight tilt from back to front with the access doors downhill
from the back panel approximately 1/2 to 3/4 inches. The slight
tilt allows the heat exchanger condensate, generated in the
recuperator coil, to flow forward to the recuperator coil front
cover.
ALTERNATE VENT/FLUE AND COMBUSTION AIR
CONNECTIONS
In horizontal installations provisions for alternate flue and
combustion air piping are available for upflow furnaces with left
discharge and counterflow furnaces with right air discharge.
This configuration allows the flue and combustion air piping
to be run vertically through the side of the furnace. Refer to
the “Recommended Installation Positions” figure for further
detail. The standard piping connections may also be used in
these positions. Refer to
Vent/Flue Pipe and Combustion Air
Pipe
for details concerning the conversion to the alternate
vent / flue and combustion air connections.
When using the horizontal alternate vent configuration, you
must use the RF000142 vent drain kit. See following illustration.
Alternate Vent/Flue Location
Figure 3A
Figure 3B
Figure 3C
Recommended Installation Positions
ALTERNATE ELECTRICAL AND GAS LINE
CONNECTIONS
This furnace has provisions allowing for electrical and gas
line connections through either side panel. In horizontal ap
-
plications the connections can be made either through the
“top” or “bottom” of the furnace.
DRAIN PAN
A drain pan must be provided if the furnace is installed above
a conditioned area. The drain pan must cover the entire area
under the furnace (and air conditioning coil if applicable).
FREEZE PROTECTION
Refer to
Horizontal Applications and Conditions - Drain Trap
and Lines.
WARNING
P
OSSIBLE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
MAY
OCCUR
IF
THE
CORRECT
CONVERSION
KITS
ARE
NOT
INSTALLED
. T
HE
APPROPRIATE
KITS
MUST
BE
APPLIED
TO
ENSURE
SAFE
AND
PROPER
FURNACE
OPERATION
. A
LL
CONVERSIONS
MUST
BE
PERFORMED
BY
A
QUALIFIED
INSTALLER
OR
SERVICE
AGENCY
.
High
Stage
Low
Stage
Natural
None
#45
3.5" w.c.
1.9" w.c.
None
Propane
LPM-10
1.25mm
10.0" w.c. 6.0" w.c.
None
0-7000
Gas
Altitude
Kit
Orifice
Manifold Pressure
Pressure
Switch
Change
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS
This furnace is shipped from the factory configured for natural
gas at standard altitude. Propane gas installations require an
orifice change to compensate for the energy content differ
-
ence between natural and propane gas.
