Instruction Manual

Multi-Appliance Comfort Control
Page 25
Ducted Reverse C
y
cle
ADVANCED FEATURES
Your new BONAIRE Ducted Reverse Cycle air conditioning system incorporates one of the most advanced
and up to date control systems and functions available to keep your home comfortable under many
different conditions. Some of the advanced features that help achieve your comfort conditions are:
AUTOMATIC DEFROST FUNCTION
During heating at low ambient (outside) temperatures it is possible for frost to build up on the outdoor heat
exchanger. This build up of frost will restrict the airflow and efficiency across the heat exchanger and
subsequently reduce the heating performance of the air conditioning system. To provide the most
effective heating, the control uses a multi-stage defrost cycle; which means the system will only defrost
when it needs, saving you energy. When the system determines a defrost must be performed it will initiate
one of two defrost cycles depending on the settings made by your installer, they are:-
Hush Defrost – Factory Setting
The Hush Defrost cycle is designed to provide you with the quietest defrost operation. During this cycle
the outdoor unit will shutdown, then restart in defrost mode. Once the system has determined that all frost
has been removed it will shutdown again then restart in heating operation and resume normal heating
functions. This defrost cycle will take on average between 6 to 12 minutes (16 minutes max.)
Quick Defrost
The quick Defrost cycle is designed to provide you with the fastest and most efficient defrost operation.
During this cycle the outdoor unit will immediately changeover to the defrost cycle when required. Once
the system has determined that all frost has been removed it will immediately return to normal heating
operation. This defrost cycle will take on average between 4 to 8 minutes (10 minutes max.). Quick
defrost is the most efficient defrost cycle and should be selected in colder climates where repeated
defrosting is more probable.
NOTES
: 1) During defrost the indoor fan and outdoor fans are switched OFF (to disable this function
please refer to your dealer). 2) During defrost you may see mist or steam emitted from the outdoor unit,
this is not abnormal. 3) If BOOST heating, if installed and activated, will operate during the defrost cycle
to assist in maintaining heating operation.
SOFT HEAT FUNCTION
The Soft Heat function is designed to reduce the possibility of cold drafts often experienced when an air
conditioning system starts heating operation. Soft heat will hold off the indoor fan until the indoor heat
exchanger is warm enough to supply warm air directly to the outlets. The control system will continually
monitor the indoor coil temperature and if it drops below 25°C will shut down the fan and allow for the coil
to re-heat before re-starting the indoor fan on low speed. It is normal for the fan to start and stop during
low temperature start-ups.
NOTE
: The Soft Heat function is set as a factory default (to disable this function please refer to your
dealer).
ECONOMY FAN SPEED SELECTION – INDOOR FAN
When operating in the economy mode the indoor fan speed is determined by the indoor comfort controller.
By monitoring the room temperature and the SET TEMP chosen by the operator the system will calculate
the best operating fan speed. As a general rule the indoor fan speed will gradually reduce as the room
temperature approaches the SET TEMP level.
NOTE
: The system will maintain low speed during system cycling if the ‘fan always on’ functions have
been set by the installer (to operate this function please refer to your dealer)