J&E Hall JEHSD-0600-M-3, Technical Manual

Page: 13 / 40

Issue: 01.05.2017 Page 13
Installation
Electrical
Mains cable type and sizing must be selected for the particular application and the electrical installation
should conform to the current local standards.
•
Cables to the condensing unit should wherever possible be routed through the cable glands supplied on the rear of
the units.
•
Connect the mains supply to the units as per the wiring diagram on page 28.
To gain access to the electrical box, turn the mains isolator switch on the end of the unit to the OFF position, remove the
screws from the end cover panel and remove panel. The electrical box is located behind the panel. Remove the screws in the
electrical box cover to access components.
Important Note:
The mains electrical supply to the condensing unit must be via a suitable motor rated circuit breaker or
fuse. A mains isolator is fitted to all condensing units therefore an additional isolator is not required unless
site conditions or regulations dictate differently.
J & E Hall Fusion Digital Scroll condensing units require a 400 volt / 3 phase / 50Hz supply which must
include a Neutral and an Earth. These systems are not suitable for any other supply voltages (other than
a deviation of +/- 10% of the above values) and are not suitable for 60Hz supplies.
The three phase supply must be connected to ensure that the compressor motor rotates in the correct
direction. Please see note on page 20.
Important Note:
There must be no more than 10 compressor starts per hour. A higher number reduces the service life of the
compressor. There is no minimum off time for scroll compressors, as they start unloaded. However,
consideration should be given to ensuring an adequate minimum run time to ensure proper oil return.