Aquacal TropiCal T170 Operation Manual page 40

A circulation pump must exist in the group to be protected.
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Water flow must be properly directed through the group's plumbing circuit via valve actuators.
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The group's freeze protection option must be set to on.
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Adjusting Groups to Allow Freeze Protection
In the following example, a "FOUNTAIN" group is edited to enable freeze protection.
Enter "Groups" menus, then proceed
IF UNIT IS ASLEEP,
SWIPE TO WAKE UP
PRESS "ENTER"
C
ARROWS TO "FREEZE
3
PROTECT ENABLED"
MENU TO EXIT, PRESS
& HOLD TO STATUS
Adjusting Freeze Protection Options
In the following example, the time is adjusted to cycle water between circuits from 5 minutes to 10 minutes.
NOTICE
Use extreme care when setting and adjusting freeze protection options. Improper freeze protection settings can cause
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damage to equipment. This is not covered by heat pump warranty.
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PRESS "MENU"
A
BUTTON
USE ARROWS TO
1
GROUP TO EDIT
PRESS "ENTER"
4
TO EDIT
Failure to heed the following may result in damage to equipment.
USE ARROWS TO
B
"GROUPS"
PRESS "ENTER"
2
TO EDIT
USE ARROWS TO
5
CHANGE TO "ON"