Inducer Assembly Rotation; Pressure Switch Tubing - Oxbox J951X U Series Installation Instructions Manual

J951X*U & J951X*D SERIES - CONVENTIONAL (1 PIPE)
VENT
UPFLOW
DIRECTION
Right Option 1
Up N/A
Left Option 2
J951X*U & J951X*D SERIES - DIRECT VENT (2-PIPE)
VENT
UPFLOW
DIRECTION
Right Option 3
Up N/A
Left Option 4
Table 4. Vent & Inducer Blower Options
Before using , the number of pipes (1-pipe or 2-pipe)
Table 4
connected to the furnace must be known. Find the proper
furnace style (upflow, horizontal, or downflow) and then the
side that the pipes will exit from the furnace. Finally select
the option that properly matches your installation type. For
J951X*U series, see
Figure 34 (page 37)
. For J951X*D series, see
38)
NOTE: It is important that Direct Vent (2-pipe) systems
maintain an airtight flow path from the air inlet to the flue
gas outlet. The furnace ships from the factory with two holes
in the cabinet for the air inlet and flue gas outlet. In certain
configurations, it is necessary to remove and relocate a plastic
plug in the furnace cabinet. If changing the position of the air
inlet and flue gas outlet, it is required that the previous hole
be closed off with the plastic plug to maintain air tightness
in the furnace. The hole locations for all furnace series are
shown in and
Figure 29 Figure 30

Inducer Assembly Rotation

WARNING:
Inducer rotation must be completed before
the furnace is connected to gas and electric. If
both utilities have been connected, follow the
shutdown procedures printed on the furnace
label and disconnect the electrical supply.
CAUTION:
It is good practice to label all wires prior to
disconnection. Wiring errors can cause improper
and dangerous operation.
1. Disconnect the electrical harness from the inducer
assembly.
2. Remove the inducer assembly ground wire from the blower
deck.
3. Remove 3 screws securing the inducer assembly to the
header box.
4. Rotate the inducer assembly to its new position.
5. Secure the inducer assembly to the header box by
reinstalling the three screws. If the inducer assembly is
rotated to the left or right side of the furnace, use the extra
screw provided in the parts package.
16
HORIZONTAL HORIZONTAL
DOWNFLOW
RIGHT LEFT
N/A N/A Option 9
Option 5 Option 6 Option 10
N/A N/A Option 11
HORIZONTAL HORIZONTAL
DOWNFLOW
RIGHT LEFT
N/A N/A Option 12
Option 7 Option 8 Option 13
N/A N/A Option 14
&
Figure 35 (page
.
Figure 36 (page 39)
.
6. Remove the cabinet plug from side of furnace and reinstall
in hole on opposite side of cabinet.
7. Install in-line drain assembly and tubing.
8. Install all condensate drain lines. For J951X*U series,
see Figure 34 (page 37)
J951X*D series, see
Figure 36 (page 39)
9. Reconnect the electrical harness to the inducer assembly.
10. Reconnect the inducer assembly ground wire to the blower
deck or door.
11. Verify operation as detailed on the furnace label.

Pressure Switch Tubing

All upflow / horizontal furnaces have two switches, one
connected to the static tap on the inducer assembly and the
other to the collector box.
Figure 14
of pressure switch tubing for J951X*U furnaces. Downflow
(J951X*D) furnaces require only one switch connected to
the inducer's static tap as shown in
Figure 14. Pressure Switch Tubing for
Upflow Furnaces
Models J951X038U, J951X054U, J951X072U,
J951X090U, J951X108U, & J951X120U
Figure 15. Pressure Switch Tubing for
Downflow Furnaces
Models J951X054D, J951X072D, & J951X090D
& Figure 35 (page 38) . For
.
displays the proper routing
.
Figure 15