47
1002594 ISSUE 1 M172 VARIHEAT
Customer’s external
pump/filter time clock
N
L
Customer interface
Connections within the
Variheat terminal box
8
9
Pool pump starter
“Pool Pump Run” demand – terminals 8/9
For control of the water pump that pumps through the Variheat pool water
circuit. If this pool water pump runs continuously, these terminals do not need
to be used. If this pool water pump is controlled NOT to run continuously, these
terminals must be used to start the pump when it would otherwise be off.
These are volt free contacts rated at 0.5A at 230V. Contacts close when the
Variheat requires pool water flow.
Where the pool water pump is controlled by a time clock (supplied by the
others) the Variheat control system can override “pump off” periods to ensure
pool water flows through the Variheat when required. Using these terminals,
in conjunction with the pool pump time clock, the pool filtration pump will run
when:
a. A “pump on” period has been set by the time clock for filtration purposes.
b. The Variheat needs to provide heat recovery to the pool water or the pool
requires supplementary heating.
If the pool water pump runs continuously these contacts do not need to be
used.
Swimming pool filtration pump time clock
If the pool filtration pump is controlled by its own time clock (not part of
Variheat), that time clock should be set as required, with the addition of
sampling periods to allow the Variheat to check and maintain the pool water
temperature.
If the pool water temperature is below the set temperature during the sampling
period, the Variheat unit will continue to run the filtration pump to allow the
pool to be heated until the set temperature is reached. (See User Settings).
The Variheat control system may override the pool filtration pump time clock.
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
NIight time pool
pump run period
Typical day time
sampling period
Summary of Contents for Variheat AW600
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