MV-AP-1082-1083-1084-11-2016 . ACTIV POOL ApS . Ledreborg Allé 128K . DK-4000 Roskilde . Tel.: +45 7022 6856 . web: www.activpool.com
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Possible cause 3: Insufficient flow.
If using a cartridge filter: Confirm this by running the system with the cartridge
removed from your pump & filter unit, this will supply the heater with the maxi-
mum flow rate your unit is capable of. If the heater then switches ’On’ (ie: red light
’On’) a blocked cartridge can be confirmed to be the cause. The cartridge should be
cleaned or replaced.
If using a sand filter: Check the pressure indicator on your sand filter and back
wash if necessary.
In some cases the ‘Thermal safety cut-out’ tripping and a low flow rate can be linked
ie: when a filter becomes choked air can be drawn into the filtration system and
become trapped inside the heater so causing the thermal cut-out to trip.
7.3
QUESTION: THE FLOW TUBE DOES NOT FEEL WARM
Due to the high efficiency of your electric heater no warmth should be detectable
from the flow tube of the heater. The most likely causes of the flow tube feeling
warm are:
• The heater has been positioned in direct sunlight.
• An air pocket is trapped inside the heater particularly if the tank feels warmer at
the highest point of the tank (as air rises).
7.4
QUESTION: THE WATER ENTERING MY POOL DOES NOT FEEL MUCH
WARMER
The temperature gain of the water after it has passed through the heater will be
directly proportional to the volume of water being pumped in relationship to the
power output of the heater.
For example: A 6-kW heater, when connected to a 4,000 litre / hour pump, will
produce a lift in temperature of approximately 1.2 C (almost undetectable to the hu-
man hand) however, as the water being heated is re-circulated from a single body
of water, the time required to heat it remains unaffected by the volume of flow. A
popular misconception is that slowing down the flow rate will speed up the heating
process.
8.
FUNCTION TESTS
8.1
QUICK FUNCTION TEST
Observe the main electricity meter when the heater is on (ie: red light ‘On’) and then
observe it again when the red light is off. The test should show that the meter is
recording more electricity being used by the heater when the red light is ‘On’.
It is impossible for an electric heater to waste energy, if it is drawing power then that
power will be turned into heat that will be trans-ferred to the water.
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