Technical data

-
V
Precision Air Conditioning
Precision Air Conditioning
68
Technical Manual : 6258867 F 07/2012
General Description
OPTIONAL EXTRAS
Wall Mounting Brackets
(CUS 3 - 4)
To allow wall mounting a bracket and fixing kit can be supplied.
Short Case Axial Fans
(C 11 - 50)
Short case axial fans can be supplied for indoor installations where discharge air requires
to be ducted to an outdoor location. The fans will meet duty plus 75Pa of external static
pressure. Refer to the Standard Features in this section for standard operating features.
Shut Off Valves
(C 11 - 50 Only)
Where required the shut off valves are shipped loose for on site fitment.
Head Pressure Control - Standard (Stand Alone)
C 11 - 50 & CUS30D
(Variable)
Head pressure is maintained by a factory fitted, pressure actuated, head pressure
controller which varies the speed of the fan(s) to provide optimum control under varying
ambient conditions.
Head Pressure Control -
Intelligent
As an alternative to the stand alone head pressure control fitted to the Condensing Units
or condensers, the system can be fitted with a voltage regulating fan speed controller
which allows set point adjustment and system monitoring via the indoor unit
microprocessor controller.
Units fitted with optional electronic expansion valves have the head pressure factory set
to 14 Barg (203 psig).
For further details please refer to the Indoor Section, General Description.
CUS 3 - 12 The fan speed controller is fitted within the control panel of the outdoor condensing unit.
C 11 - 50 (Standard) As standard the fan speed controller is fitted within the indoor unit. This option requires
that the electrical supply for the condenser is supplied via the indoor unit.
or
C 11 - 50 (Optional) The fan speed controller is fitted within a weatherproof enclosure fitted to the outdoor
condenser unit. This option requires the electrical supply to be connected directly to
the condenser.
Mains Electric Isolator
(CUS30D)
A weatherproof mains isolator is fitted to ensure complete unit isolation of the electrical
panel during adjustment and maintenance.
LP Start Kit
(CUS30D)
If unit operation in an ambient below -5°C is envisaged, a low pressure start kit can be
factory fitted which prevents low pressure nuisance tripping on start up.
OUTDOOR UNIT