1.9 FROST PROTECTION WHEN GLYCOL IS MIXED INTO THE SYSTEM WATER
Based on its factory settings, the heat pump already provides a frost protection function which involves starting Pump 1 and/or starting the heat pump
during heating, according to multiple start-up thresholds based on outdoor temperature, water temperature and its start-up condition.
If a certain amount of mono ethylene glycol is mixed into the water in the system, the frost protection start-up temperatures can be lowered. Accordin-
gly, a frost protection function has been implemented in the USER INTERFACE, with settable start-up thresholds.
Fig. 7: To disable the machine's internal frost protection control, set the switches on For1.
Before starting this function it is necessary, however, to switch off the "factory set" frost protection as follows:
• Take the front/side panel off of the heat pump.
• Find the “PCB Main Display”
• Based on the factory setting, “dip switch 1” is ON, and therefore frost protection is enabled.
• Set “dip switch 1” on OFF.
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