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Sales/Spares 01604 707012 Replacement Help Line 01604 707011
12. COMMISSIONING
12.1
Ensure the heater is correctly fitted with water and all air vented from the flow and return circuits.
12.2
Switch on electrical supply.
12.3
Setting maximum speed.
12.3.1 Make a short across thermista-stat connections, if fitted, and adjust the fan speed as required,
remove the short.
12.4
Setting minimum fan speed.
12.4.1 Make a short across the pipe sensor and adjusted the fan speed as required, remove short.
12.5
WITH THERMISTA-STAT FITTED
12.5.1 Turn up thermista-stat to call for heat.
12.5.2 Check for 230V on switch live out.
12.5.3 With the water at the required temperature ensure fan starts
12.5.4 Allow the system to warm up and check temperature rise across unit is 40
°
C.
12.5.5 Set water differential to 20
°
C using lockshield valve or equivalent.
12.5.6 Turn off thermista-stat and check there is NO 230V on switch live out.
12.5.7 Check fan stops when water cools to required temperature.
12.6
WITH NO THERMISTA-STAT FITTED
12.6.3 With the water at the required temperature ensure fan starts
12.6.4 Allow the system to warm up and check temperature rise across unit is 40
°
C.
12.6.5 Set water differential to 20
°
C using lockshield valve or equivalent.
11.6.6 Check fan stops when water cools to required temperature.
13.
SERVICING & MAINTENANCE
13.1 ROUTINE
MAINTENANCE
IMPORTANT: Before carrying out any work on the unit, ALWAYS ENSURE THAT IT IS ISOLATED FROM
THE MAINS ELECTRICAL SUPPLY.
Remove the filter and unscrew the two retaining screws holding the front cover on the unit, gently pull it
forward.
Maintenance should be carried out at least once per year.
13.1.1 Check that the heat exchanger airways are free from obstructions. If necessary, clean with a
vacuum cleaner from the air inspection panel, taking care to not damage the airways.
CAUTION: THE ELEMENTS OF THE HEAT EXCHANGER ARE VERY FRAGILE.
13.1.2 Check the condition of the external strainer, cleaning as necessary.
13.1.3 Check that the air filter is being regularly cleaned in accordance with the User’s Instructions.
13.2 PCB
REPLACEMENT
13.2.1 Ensure that the electrical supply is switched off and isolated.
13.3 PCB
REMOVAL
1
3.3.1 Disconnect the wiring at the PCB terminal block.
13.3.2 Release the 4 clips securing the PCB and withdraw the panel, disconnecting the fan supply lead
at the fan tray terminal block.
13.3.3 Reassembly or replacement is in reverse order.
13.4 FAN
REMOVAL
13.4.1 Ensure that the electrical supply is switched off and isolated.
13.4.2 Disconnect the 2 inline connectors on the fan assembly.
13.4.3 Release the screws securing the fan and withdraw if from the location runners.
13.4.4 Refitment or replacement is in reverse order.
13.5
HEAT EXCHANGER REMOVAL
13.5.1 Ensure that the electrical supply is switched off and isolated.
13.5.2 Close the isolating valves and drain down the unit.
13.5.3 Release the clip and remove the heat exchanger and its associated pipework from the unit.
13.5.4 Refitment or replacement is in reverse order. Ensure that all air locks are expelled, and check for
water soundness.
13.6
AIR FILTER REMOVAL
13.6.1 The air filter is removed by sliding it out from the front of the unit.
