AP3/30_AP3/50_AP3/80_AP3/100_Instructions. V1.01 Page 12 August / 2012
Electrical
Switch off the mains electrical supply before removing the electrical cover panel or carrying
out any work involving a live circuit or access to components that may be live.
Do not switch on the electrical supply until the unit is full of water.
This appliance must be earthed.
The electrical connection to the heating elements must conform to current IEE wiring
regulations and be permanently connected to the electrical supply through a double-pole
isolating switch with at least 3mm contact separation in each pole and with a minimum rating
of 15A.
Allinternalwiringisfactorymountedandshouldnotbealteredormodied.
A suitable supply cable should be fed through the grommet on the underside of the appliance,
connected to the live, neutral and earth connections on the terminal block and secured with
the cable clamp provided.
Check all electrical connections for security and tightness.
The appliance has a working thermostat adjustable between 25ºC and 75ºC.
An over temperature cut-out is incorporated within the thermostat which is designed to
operate at 79-84ºC. Should this happen, press the reset button.
Important: Before resetting the over temperature cut-out or altering the thermostat
setting, isolate the electrical supply to the unit before removing the electrical cover
panel. Ensure that the cover panel is replaced correctly and the retaining screws tted
before re-connecting the electrical supply.
Commissioning
1. Check that all the requirements under “Installation Requirements” have been met.
2. Check that all water and electrical connections are correct and tight.
3. Check that the expansion vessel pressure is correct – refer to label on vessel for correct
pressure.
4. Check that the drain valve is closed.
5. Open hot water taps.
6. Openthecoldwatersupplyvalveandpermittheheatertoll.
7. Leavehottapsopenuntilallairhasbeenpurgedfromthesystemandwaterisowing
freely from all outlets.
8. Check for leaks and rectify as necessary.
9. ChecktheoperationofboththeT&PreliefvalveandtheExpansionReliefValvetoensure
freewaterowthroughthedischargepipebyturningtheknobtotheleftandholdingin
the open position.
10. Set the thermostat(s) to the desired temperature setting. The ‘E’ position with a water
temperature of approx. 55ºC is recommended for economical operation while minimising
lime-scale deposits and thermal losses.
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