Low Voltage (Ac) Field Wiring; Connections; Interprocessor Communication; Bridge Module Wiring - Trane IntelliPak SCWF 20 Installation, Operation And Maintenance Manual

I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l
local codes.
• Reference Table 33, p. 51
distance and size.
• Communication link wiring must be 18 AWG
shielded twisted pair (Belden 8760, or equivalent).
• Communication link must not exceed 5,000 feet
maximum for each link. See
• Do not run communication link between buildings.

Low Voltage (AC) Field Wiring

Connections

1. To access the wire entry locations, open the RHI
panel door and remove the two screws on the right-
hand side of the key pad.
2. Swing the keypad open, exposing both the wire
entries and the back of the HI module.
3. Refer to Figure 28, p. 53
three conductor 24 volt wires to the remote panel
terminal strip (+), (-), and (ground).
Interprocessor Communication Bridge
Module Wiring
1. Refer to the figure below and trim the outer
covering of the shielded cable back approximately
one inch.
2. Cut the bare shield wire off even with the outer
covering.
3. Strip approximately 1/2" of insulation from each
insulated wire in order to connect them to the
terminal strip at the unit.
4. Wrap tape around any exposed foil shield and/or
base shield wire.
N N o o t t e e : : The communication link is polarity sensitive.
Figure 29. Dressing shielded twisted wire
Communication Link (Shielded Twisted
Pair) Wiring
1. Trim the outer covering of the shielded cable back
approximately 1 inch. See the "Dressing shielded
twisted wire" figure above. Do not cut the bare
shield wire off.
2. Strip approximately 1/2–inch of insulation from
each insulated wire to connect them to the terminal
strip at the remote panel.
54
for recommended wiring
Table 32, p. 51
and connect one end of the
3. Connect the white lead to the positive (+) terminal,
the black lead to the negative (-) terminal, and the
bare shield wire to the terminal at the remote
human interface panel.
4. Close the key pad plate and install and tighten the
two screws removed earlier.
5. Close the outer door and install the recessed
locking screw at the bottom right hand side of the
enclosure to prevent accidental starting of the unit
by unauthorized personnel while completing the
wiring at the self-contained unit.

At the Self-Contained Unit

1. Connect the opposite end of the three conductor 24-
volt wire to the appropriate terminal strip as
follows:
N N o o t t e e : : Although the 24 volt power is not polarity
sensitive, do not connect either the + (plus) or
- (minus) terminals from the remote panel to
ground at the self-contained unit.
2. Connect the wire connected to the positive (+)
terminal at the remote panel.
3. Connect the wire connected to the negative (-)
terminal at the remote panel.
4. Connect the ground wire from the remote panel to
the unit control panel casing.
5. Refer to the unit wiring diagram and connect the
white lead to the positive (+) terminal and the black
lead to the negative (-) terminal. (These terminals
are numbered. Reference to color is for clarification
to maintain polarity).
N N o o t t e e : : To maintain polarity, do not connect the base
shield wire to ground at the self-contained
unit.
SCXF-SVX01Q-EN