SYSTEM OPERATION
8
COMBUSTION AIR INTAKE PIPE OPTIONS:
The RF000142 coupling can be secured directly to the
furnace intake coupling if condensation is occurring in the
combustion air inlet pipe. If the RF000142 is used on the
combustion air inlet, it must be installed with the arrow
pointing up. It should be noted, the combustion air will
actually be moving in a direction opposite of the arrow on the
RF000142 coupling.
Alternatively a tee may be used in the combustion air
intake pipe for the same purpose. If either option is used,
a eld supplied trapped drain tube, free-draining to proper
condensate disposal location must be present. A loop in the
drain tube can serve as a trap. The unused RF000142 drain
tting should be capped.
1. Remove screws from vent ange.
2. Remove internal elbow and vent pipe.
3. Cut pipe 2 1/2” from ange.
4. Remove cabinet plug adjacent to inducer outlet and
install an original cabinet vent hole.
5. Install RF000142 coupling on inducer outlet.
6. Install anged vent section removed in step 2 and se-
cure with clamps.
7. Secure ange to cabinet using screws removed in step
1.
Insert flange. Cut 2 ½” long.
R 000142F
The furnace rating plate includes the approved furnace gas
input rating.
REVE UREIEERIR EQUIMEMEE IE
S SU RE SSURE MUS E SSEIIE EUI RI E
WI ER USE SIRE IESERI
Inlet gas supply pressures must be maintained within the
ranges specied below. The supply pressure must be constant
and available with all other household gas red appliances
operating. The minimum gas supply pressure must be
maintained to prevent unreliable ignition. The maximum must
not be exceeded to prevent unit overring.
Minimum: 4.5" w.c. Maximum: 10.0" w.c.
This unit is equipped with a 24 volt gas valve controlled during
furnace operation by the integrated control module. Taps for
measuring the gas supply pressure and manifold pressure
are provided on the valve.
The gas valve has a manual ON/OFF control located on
the valve itself. This control may be set only to the “ON” or
“OFF” position. Refer to the Lighting Instructions Label or the
“Putting the Furnace Into Operation” section of this manual or
the installation instructions for use of this control during start
up and shut down periods.
Length of
Nominal Black Pipe Size
Pipe in Feet 1/2" 3/4" 1" 1 1/4" 1 1/2"
132 278 520 1050 1600
92 190 350 730 1100
73 152 285 590 980
63 130 245 500 760
56 115 215 440 670
50 105 195 400 610
46 96 180 370 560
43 90 170 350 530
40 84 160 320 490
38 79 150 305 460
CFH =
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on 0.60
Specific Gravity Gas)
BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
To Next Page
Loading...
