Table of Contents
Advertisement
Line Power Supply Wiring
To assure that power supply wiring
to the starter panels are properly
installed and connected, review and
follow the guidelines outlined below.
Typical equipment room layouts are
shown in Figures 25 and 26.
3-Phase Power Source
1. Verify that the starter nameplate
ratings are compatible with the
power supply characteristics - and
with the electrical data on the CDHF
nameplate.
2. If the starter enclosure must be cut
to provide electrical access, exercise
care to prevent debris from falling
inside the enclosure.
CAUTION
Starter Damage!
Debris inside the starter panel may
cause an electrical short that
seriously damages the starter
components.
Figure 23 - Proper Phasing for Starter Power Supply Wiring
CDHF-SVN01B-EN
Electrical
Information
3. Use copper wire to connect the 3-
phase power supply to the
remote-or-unit-mounted starter
panel.
CAUTION
Use Copper Conductors
Only!
Unit terminals are not designed to
accept other types of conductors.
Failure to use copper conductors
may result in equipment damage.
4. Size the power supply wiring in
accordance with NEC, using the RLA
value stamped on the chiller
nameplate and transformer load on
L1-and L2.
Note: All CDHF units are designed to
comply with NEC guidelines.
5. Make sure that the incoming
power wiring is properly phased;
each power supply conduit run to
the starter must carry the correct
leads to ensure equal phase
representation. See Figure 23.
Line Power
Wiring
6. As you install the power supply
conduit, make sure that its position
does not interfere with the
serviceability of any of the
components, nor with structural
members and equipment. Also,
assure that the conduit is long
enough to simplify any servicing that
may be necessary in the future (e.g.,
starter removal).
Note: Use flexible conduit to
enhance serviceability and minimize
vibration transmission.
Circuit Breakers and Fusible
Disconnects
In compliance with NEC guidelines,
size the circuit breaker or fused
disconnect, the chiller nameplate
max. fuse size or max. circuit breaker
size marking.
Note: Right hand and left hand
circuits may have different RLAs.
See unit nameplate.
7. Tightening torque. Follow starter
manufacturers torque specifications
and annual inspection methods.
Note: Connect L1, L2, L3 per starter
diagram.
47
Advertisement
Table of Contents
