Furnace Installation; Electrical Wiring; Line Voltage Wiring - Bosch DX Series Installation And Maintenance Manual

furnace Installation

figure 4: Combustible floor base Installation
fURNACE INStAllAtION
Installing the Air Handler
Closet Installation
Prior to installing the furnace make sure the holes
are cut into the floor for the refrigerant tubing, the
drain line, the electrical wiring, the thermostat
wiring and the condenser control wiring.
1. Remove the top shipping cover and corner
posts.
2. Remove the bottom shipping cover.
3. Remove the blower and control box access
panel (door).
4. Remove the coil compartment access panel
(door).
5. Place the unit into position using one of the
following choices:
A. If the Combustible Floor Base is used you
slide the unit on to the combustible floor
base until the unit is touching the flanges on
the back of the floor base.
B. If the Combustible Floor Base is not used
you slide the unit over the duct opening until
the opening in the unit lines up with the duct
opening in the floor.
6. Secure the unit by one of the two choices:
Revised 11-11
Unitary Air Handler DX and Hydronic Series
Caution
Subject to change without prior notice
A. If the Combustible Floor Base is used you
secure the furnace to the floor by drilling two
holes through the furnace base and the floor
base at the right and left front inside corners
of the cabinet. Use two screws to secure the
furnace to the floor.
B. If the Combustible Floor Base is not used
you secure the unit to the floor by drilling
two holes through the furnace base at the
left and right front inside corners of the
cabinet. Use two screws to secure the unit to
the floor.
7. Use caulking, sealers, and/or tape to seal
between the combustible floor base and the
opening on the unit or between the opening on
the unit and the duct in the floor.
8. Connect the electrical supply wires and the
thermostat control wires in the control box.
9. Connect the refrigerant lines to the coil.
10. Re-install the coil compartment access panel
(door) and secure with the screws that were
removed in Step 3.
11. Re-install the blower and control box access
panel (door) and secure with the screws that
were removed in Step 2
12. Turn the power on to the unit by following the
procedure in the Users Information Manual.
13. Set the thermostat to the desired temperature.

ElECtRICAl WIRING

Refer to the unit nameplate for specific electrical
data.
Disconnect power at main fuse or circuit breaker
distribution panel before wiring unit to prevent
shock or fire hazard.

lINE vOltAGE WIRING

POWER WIRING
The unit internal wiring is complete except for the
power supply and the thermostat wires. The use of
cable connectors on incoming power supply wires
to relieve any strain on wiring is recommended.
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