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INSTALLER SETTING
Service - Frost protection temperature
A frost protection function prevents freeze up of water pipes. If any pipe sensor measures a
temperature below 4°C (Default), the water pump and backup heater are turned on.
Defrosting operation is blocked if the leaving water temperature drops below 4 °C (Default) and it
won’t start until a temperature of 15 °C (Default) is reached.
If anti-freeze (glycol) is added to the water, the permitted temperature level can be as low as
-1 °C(lowered by 5 degrees) down to -21 °C (lowered by 25 degrees).
All related temperatures will be shifted in the same way. For example, if 'Frost Protection Temp.'
is selected as -1 ℃, all temperatures that are the basis for judging frost protection are shifted by
5 degrees, too.
Consequently, the frost protection will be cancelled at a water temperature of 10 °C instead of
15 °C.
CN_ANTI_SW
OFF
ON
SW1
1 2 3 4 5 6 7 8
Antifreeze short pin
NOTE
Before change of setting is applied, the antifreeze short pin (CN_ANTI_SW) must be removed
and DIP switch SW1 - No.8 must be on.
Frost protection must be tested with a refractometer on a frequent basis!
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