14
FAULT FINDING AND SERVICING
IMPORTANT
• Servicing should only be carried out by com-
petent persons in the installation and maintenance
of unvented water heating systems.
• Any spare parts used MUST be authorised
Pullin Evolution Solar parts.
• Disconnect the electrical supply before remov-
ing any electrical equipment covers.
• NEVER bypass any thermal controls or oper-
ate system without the necessary safety valves.
• Water contained in the Pullin Evolution Solar
unit may be very hot, especially following a ther-
mal control failure. Caution must be taken when
drawing water from the unit.
SPARE PARTS
A full range of spare parts are available for the Pullin
Evolution Solar range. Refer to the Technical Data la-
bel on the unit to identify the model installed and en-
sure the correct part is ordered.
Description Part no.
Immersion heater (bent) 95 606 961
Immersion heater (straight) 95 606 962
Immersion heater gasket 95 611 822
Immersion heater backnut 95 607 869
Solar temperature probe
pocket plate 95 607 064
Immersion heater key 95 607 861
Tundish 95 605 838
Expansion valve cartridge - 6bar 95 605 864
Expansion valve complete - 6bar 95 607 030
Cold water combination valve complete 95 605 047
Cold water combination valve body 95 605 048
Pressure reducing valve
cartridge 3.5bar 95 607 029
Temperature/Pressure Relief Valve 95 605 810
Expansion vessel 25 litre 95 607 612
Direct controls
Combined thermostat and thermal
cut-out 95 612 026
Terminal cover 95 614 089
Indirect controls
Indirect thermostat 95 612 697
Indirect Thermal cut-out and
Solar Cut-out 95 612 698
Motorised valve 2-port 95 605 049
Terminal housing 95 614 090
4 Way terminal block 95 607 902
Temperature adjustment is made by inserting a flat
bladed screwdriver in the adjustment knob and
rotating. The minimum thermostat setting is 10
o
C.
The adjustment range 1 to 5 represents a tempera-
ture range of 30 to 70
o
C (60
o
C will be approximately
position 4). If in any doubt contact a competent
electrician.
On indirect units an immersion heater is also
provided for use should the indirect heat source be
shut down for any purpose. The immersion heater
control temperature is set using the immersion
heater (direct) thermostat, see User Instructions
section for details.
DO NOT bypass the thermal cut-out(s) in any
circumstances.
FLOW PERFORMANCE
When initially opening hot outlets a small surge in
flow may be noticed as pressures stabilise. This is
quite normal with unvented systems. In some areas
cloudiness may be noticed in the hot water. This is
due to aeration of the water, is quite normal and will
quickly clear.
OPERATIONAL FAULTS
Operational faults and their possible causes are
detailed in the Fault Finding section of this book. It is
recommended that faults should be checked by a
competent installer.
The air volume within the expansion vessel will
periodically require recharging to ensure expanded
water is accommodated within the unit. A discharge
of water INTERMITTENTLY from the expansion valve
will indicate the air volume has reduced to a point
where it can no longer accommodate the expansion.
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