Dunham-Bush ACXi 165-5SP-LN, Installation, Operation And Maintenance Manual

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2.0 INSTALLATION
2.) Check unit wiring for damage and all
terminal connections for tightness. Unit
terminal blocks are to be connected with
copper conductors only, sized per ampacity
listed on unit data plate.
3.) Connections to unit should match the unit
nameplate in volts, phase, and Hertz. Voltage
must not vary beyond ±10% of nameplate
value and voltage imbalance between phases
must not exceed 2% at any time during
operation of the unit.
4.) Phase sequence to connectors L1, L2 and L3
shall be in that order. Check with Amprobe
phase sequence adapter PSA-1 or equivalent.
2.9 CONTROLS
2.9.1 CONNECTIONS
Controls which are to be field installed
should be connected in accordance with
the appropriate wiring diagram
accompanying the unit. The following
connections should be made where
applicable:
1.) Connect a set of normally open
auxiliary contacts from chilled water
pump contactor into unit
controls as
shown on unit wiring diagram.
2.) Install a chilled water flow switch
(paddle type recommended) (or
differential pressure switch) in
straight length of chilled water piping
to avoid turbulence.
Connect in same
electrical circuit as ( 1.)
2.9.2 SETTINGS
All controls are factory set, however
operating control settings are not always
applicable under all operating
conditions. For recommended control
settings, see wiring
diagram
accompanying unit. Safety controls
must be set to factory
recommendations.
2.10 REQUEST FOR START-
UP REPRESENTATIVE
After the installation has been completed and
checked, Form 9180 must be filled out and sent
to the Dunham-Bush Service Department for
authorized start-up representative to perform the
initial start-up of the Dunham-Bush packaged
chiller. The purchaser will have competent
service and operating personnel in attendance to
assist in the work involved, and also to be trained
in the service and maintenance of this unit.
(During the warranty period, the manufacturer is
responsible for parts only upon proof of defective
workmanship or manufacture).
Following receipt of the signed Form 9180, a
representative will be sent to the customer. He
will inspect the installation to determine whether
it meets Dunham-Bush, Inc. requirements;
perform the initial start-up of the installation;
determine whether it is in satisfactory operating
condition; and instruct the specified customer
personnel in its operation and maintenance for
the length of time specified in the purchase
contract.
NOTE:
Sump oil heaters should be energized
for a minimum of 24 hours and the oil
sump temperature must be at a
minimum of 100°F (38°C) prior to
arrival of start-up representative. This
will ensure that the oil is warm enough
to vaporize any dissolved refrigerant
and that the oil is within the normal
operating temperature range.
WARNING:
The compressor (s) should be
started initially ONLY under the
direct supervision of an
Authorized Dunham-Bush, Inc.,
Start-Up Representative.
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