REV : 3
REV DATE : 12/16
DPN002933
Page :2 /3
UPFLOW & DOWNFLOW MODELS
Form No.: DPN001040_REV4
ELECTRICAL FIELD CONNECTIONS
LIEBERT PDX & PCW
Terminal block with terminals 49
L) + SH (shield connection). The terminals are used to
connect the CANbus communication cable (provided by others) from the indoor unit to the Liebert MC Condenser.
21) CANbus Cable – CANbus cable provided by others to connect to the outdoor condenser and optional PRE unit. No special considerations are required
when the total external cable connection between the indoor unit and outdoor unit(s) is less than 450FT (137M). For total external cable connections
greater than 450FT (137M). For external cable connections greater than 450FT (137M), but less than 800FT (243M) a CANbus isolator is required
(Contact Factory).
Cable must have the following specifications:
- Braided shield or foil shield with drain wire
- Shield must be wired to ground at indoor unit
- 22-18AWG stranded tinned copper
- Twisted pair (minimum 4 twists per foot)
- Low Capacitance (15pF/FT or less)
- Must be rated to meet local codes and conditions
- EXAMPLES BELDEN 89207 (PLENUM RATED), OR ALPHA WIRE 6454 CATEGORY 5, 5E, OR HIGHER
22) Do not run in same conduit, raceway, or chase as high voltage wiring.
23) For CANbus network lengths greater than 450FT (137M) call Factory.
NOTE: Refer to specification sheet for total unit full load amps, wire size amps, and max overcurrent protective device size.
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