SV Series
Spa Controls
13
Heating Control & Protection
Fast Heat Cycle / freeze and overheat protection
Fast Heat Cycle
After initial mains power on the SV controller will perform a fast heat up cycle that
enables continuous demand heating regardless of programmed sleep timers or choice of
Economy (ECON) or Normal (NORM) heating modes. Once the set temperature has
been reached the fast heat up cycle is cancelled and normal operation resumes.
The purpose of a fast heat up cycle is to help the spa reach set temperature as soon as
possible after it has been powered up. For new spas or spas refilled with cold water it is
desirable not to have sleep time or economy heating mode delay the time to takes for
the spa to reach set temperature point.
Note:
AWAY mode disables a fast heat up cycle.
IMPORTANT NOTES
•
A fast heat up cycle is cancelled by manually forcing the filtration pump to OFF via the keypad.
•
For new spas or when a spa has just been refilled it is common for spa owners to test the
operation of each pump when the power is first turned on. This process will effectively
cancel the fast heat up cycle. After completing testing of spa functions remember to reset
mains power if you wish to reactivate the fast heat up cycle.
Freeze Protection
Freeze protection will be activated whenever the water temperature drops below 4
o
C. It
runs back to back 10 minute sanitise cycles and displays “WARM” on the LCD. It also
runs each spa accessory (ie. jet pumps and air blower) in sequence to run water through
the pipe work whilst running the filtration pump and heater. During the “WARM” cycle
the heater and heat pump (if fitted) will operate however heater load shedding may
occur when accessory pumps are running depending on controller settings.
At the end of each 10 minute “WARM” cycle the water temperature is checked. If it is
above 4
o
C freeze protection stops and the controller returns to its prior state. If the
temperature is not above 4
o
C another cycle will run.
Note:
Freeze protection overrides sleep time or power save times – if the water
temperature drops below 4
o
C and the controller is in a sleep period it will wake up. So
even if high amounts of sleep time, power save time and a low set temperature point
have been programmed, the SV controller will always maintain the water temperature
at least above 4
o
C.
Defrost Cycle
(Heat Pump models only)
During periods of low ambient temperatures defrost cycles may be required to prevent
the heat pump’s condenser from freezing. Ambient and condenser temperatures are
constantly monitored and defrost cycles will be automatically activated if certain
conditions are met. Defrost cycles run for a minimum of 3 minutes to a maximum of 10
minutes.
Overheat Protection
All SV controllers feature three forms of overheat protection:
•
If sensed water temperature within the heater unit exceeds safe working limits
the heating element will be disabled and the controller will shut down and latch
fault code (ER4 - Thermal Trip). Normal operation will not resume until heater
element has cooled and mains power is reset
•
If sensed water temperature exceeds 42
o
C filtration is stopped until the
temperature falls below 42
o
C to prevent heat rise from filtration pump
operation
•
If sensed water temperature exceeds 45
o
C the controller will shut down and
latch fault code (Er5 - Pool too hot). Normal operation will not resume until
mains power is reset
Summary of Contents for SV2
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