Calorex VARIHEAT VH3 AA600 Manuel D'installation page 19

2.5.2 NOTES ON TERMINAL BLOCK CONNECTIONS
NOTE 1 - Remote occupied/unoccupied
These contacts (from terminals 10 & 11) are to enable the air temperature set back facility to be remotely
overridden. Please note that in unoccupied mode on AW machines, water heating does not take place
unless there is a demand for dehumidification.
There is a 12 Vac output from these terminals and closing a remote switch will enable the unit to regain the
normal operating air temperature for when the pool is in use.
This can be done via a voltage free pool cover switch or some other form of voltage free switch.
If this facility is used then the time clock (if fitted) on the control panel of the unit should be set to the
'unoccupied' (o) position. (See note on time clock and switch settings, section 3.2.1).
If these terminals are fitted on versions without time clocks then they MUST BE LINKED.
NOTE 2 - Pool pump start -AW only (see also section 3.2.2)
These are voltage free contacts (from terminals 8 & 9) rated at 3(1) Amp at 230 Volts.
If the pool water pump is to be run via an external time clock then these connections should go across the
switching contacts of the external time clock to ensure that, if dehumidification demand occurs the pool
water pump will start.
The pool water pump will exceed the one amp inductive rated current of these contacts therefore a
contactor or relay should be used to switch the load of the pump.The switching action of the external time
clock should energise the contactor/relay coil.
If the pool water pump is to be run continuously then these contacts can be ignored.
NOTE 3 - Boiler demand -AA+LPHW & AW machines only
These are voltage free contacts (from terminals 6 & 7) rated at 3(1) Amp at 230 Volts.
If the low pressure hot water supply to the unit is to be governed by the Calorex unit then these contacts
should be utilised to bring water to the unit via the boiler, motorised valve, boiler pump etc. Remember the
maximum inductive load is one amp.
This is dependant on how the low pressure hot water supply to the unit has been designed.
If the supply of low pressure hot water to the unit is not dependant on a signal from the unit then
these contacts can be ignored.
NOTE 4 – SEPARATE SUPPLY FOR RESISTANCE HEATER BOX
If resistance heaters are fitted then an extra power supply will be required to the terminal blocks inside the
heater box. See section 4.0 for supply amps & fuse size.
CONTROL PANEL 25 WAY CABLE CONNECTION
Data signal between control panel and electric box is via a 25 way cable with 'D' connection (plug &
socket) both ends.
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