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Starter to UCP (Remote-
Mounted Starters Only)
Electrical connections required
between the remote-mounted starter
and the chiller control panel (UCP)
are outlined in Table 10 or 11, as
applicable.
Note: Install separate conduit
between the volt circuits; and the
UCP to the starter for the IPC circuit.
When sizing and installing the
electrical conductors for these
circuits, follow these guidelines.
CAUTION
Starter Damage!
Debris inside the starter panel may
cause an electrical short that
seriously damages the starter
components.
1. If the starter enclosure must be cut
to provide electrical access,
exercise care to prevent debris
from falling inside the enclosure.
2. Use only shielded twisted pair for
the IPC circuit between the starter
and the UCP on remote mounted
starters. Recommended wire is
Beldon Type 8760, 18 AWG for
runs up to 1000 feet.
CDHF-SVN01B-EN
Electrical
Information
Note: The polarity of the IPC wire
pair is critical for proper operation.
3. Separate low-voltage (less than
30V) wiring from the 115V wiring
by running each in its own
conduit.
4. As you route the IPC circuit out of
the starter enclosure, make sure
that it is at least 6" from all wires
carrying a higher voltage.
5. The IPC Shielded Twisted Pair
wiring should be grounded on one
end only at UCP end.
The other end should be un-
terminated and taped back on the
cable sheath to prevent any contact
between shield and ground.
6. Oil Pump Interlock - Both starters
must provide an interlock [N.O.]
contact with the chiller oil pump
connected to the UCP at Terminals
1A7-J2-4 and 1A7-J2-2 [14 ga] in
each control panel. The purpose of
this interlock is to power the oil
pump on the chiller in the event
that a starter failure, such as
welded contacts, keeps the chiller
motor running after the controller
interrupts the run signal.
Starter to UCP
Control Wiring
CAUTION
Electrical Noise!
To ensure that electrical noise does
not distort the signals carried by the
low-voltage wiring, including the
IPC, maintain at least 6" between
low-voltage (<30V) and 115V
circuits.
UCP Electrical Specifications
Following is a list of constraints for
the UCP in the control panel:
Note that the control panel is
designed to receive input from the
secondary of a power transformer in
the starter panel.
1. Nominal Voltage: 115 VAC, with
operating range of 98 to 132 VAC,
inclusive.
2. Maximum VA: 1725 VA (15-amp
fuse).
3. Power input wiring must be at
least 6" from low-voltage less than
30V wiring.
4. All signal inputs are low-voltage,
less than 30V.
5. UCP Storage Range: -40°F to 158°F
(-40°C to 70°C).
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