OVERVIEW
The scope of this section is limited to main field
wiring connections and to the control panel.
Hussmann’s Scroll Plus
™
Control Panels feature
custom wiring schematics. Most of the common
user choices are detailed in this section. For a
schematic of the control panel as shipped, see the
diagrams on the panel. There are three:
– Compressor Control Circuit Diagram
– Defrost Diagram
– Power and Accessories Diagram.
The Fibertronic Circuit Boards are discussed at
length. Both explanation of Board layout and a
troubleshooting chart to determine Board continu-
ity are here. The Scroll Plus System is available
wired for 208-230/3/60 or 460/3/60 or other inter-
national voltages. In any case, the control circuit
is 120V. Refer to the serial plate located on the
control panel to determine wire size (MCA) and
overcurrent protection (MOPD).
FIELD WIRING
Scroll Plus components are wired as completely
as possible at the factory with all work completed
in accordance with the National Electrical Code
(NEC). All deviations required by governing elec-
tric codes will be the responsibility of the
installer.
The lugs on the circuit breaker package in the
compressor control panel are sized for copper
wire only, with 75
O
C THW insulation. All wiring
must be in compliance with governing electrical
codes.
For Remote Header Defrost Assembly:
To the remote defrost control panel provide
– one 120V 1PH 15A branch circuit.
Between the remote defrost control panel and the
Scroll Plus System provide
– one 120V 15A 2-wire circuit.
For 208-230/3/60 Compressor Units:
To each Scroll Plus System rack provide
– one 208-230/3/60 branch circuit
– one 120V 1PH 30A circuit—omit when
single point connection kit is used.
To each remote air-cooled condenser provide
– one 208-230/3/60 branch circuit.
For 460/3/60 Compressor Units:
To each Scroll Plus System rack provide
– one 460/3/60 branch circuit
– one 120V 1PH 30A circuit—omit when
single point connection kit is used.
To each remote air-cooled condenser provide
– one 460/3/60 branch circuit.
For Alarm Wiring
Between the Compressor Control Panel and the in
store alarm bell provide
– one 120/1/60 10A circuit.
September 1, 1997
P/N 401789
4 - 1
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
ELECTRICAL
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