Electrical - Johnson & Starley RenoXtra 30CA Installation, Maintenance And Servicing Instructions

system must be through a common double pole isolation switched
spur that has a 3mm separation on each pole and has a 3A rated
fuse. It should be used for the heating system only and no other
household components. A fused three pin plug and shuttered outlet
may also be used provided they both comply with BS 1363.
Important: This appliance must be earthed and it must be wired
in accordance with these instructions. In addition, it must have a
permanent electrical supply that is not interrupted by a timing device
or thermostat.
12.1.3 Fit the electrical supply cable as shown using the connection plug
provided. The cable must be at least 0.75 mm², PVC insulated to
BS 6500.
12.1.4 As a minimum, a room thermostat MUST be fitted and therefore
the link between L2 & L1 should be removed and the thermostat
connected between these two connections. If the thermostat has
a neutral connection, this should be used in order to enhance the
temperature control. Programmable thermostats are wired in a
similar way!
All cables entering/leaving the appliance MUST be restrained by
use of the cable clamps!
12.2 Frost Protection
12.2.1 The microprocessor based controls within the appliance monitor the
water temperature in order to protect from freezing. To ensure that
this function is active the main switch on the appliance should be
left on and the gas supply also left on. This does not protect remote
areas of the heating system, which should be protected by other
means (e.g. an independent frost thermostat that is linked back to
the appliance).
12.2.2 If a frost 'stat is required to protect remote parts of the heating
system, this should be fitted as accordingly.
12.3 Optional System Controls
12.2.1 Opentherm protocol controls are available for outside temperature
compensation and room temperature sensing and can be used to
improve the heating system control. They must be connected to
the correct terminals as described in their own instructions. A room
thermostat MUST NOT be used with these controls.
12.4 Fitting The Case & Control Module
12.4.1 Remove the case components from their packaging and fit the LH
and RH case panels to the appliance. Each panel hooks over the
two lugs at the top of the appliance and screws to the base with the
screws provided.
12.4.2 Remove the controls door from the module panel and offer the
controls module up to the side case panels. The two hinge pins drop
into the two slots on the groupset support.
12.4.3 Fit the support strap (green cord) to the appliance to support the
controls in the horizontal position.
12.4.4 Make the electrical harness connections to the rear of the module,
ensuring that the harness connections are paired with their
respective mates on the control module: X1; X2 etc.
12.4.5 Swing the controls up into their vertical position and secure to the
side case with the two screws provided.
12.4.6 Refit the controls door, fit the front outer case and secure with the
screw in the top of the boiler.
12.5 Electrical Testing
Carry out electrical checks:
• Earth continuity and short circuit of cables
• Polarity of the mains supply
• Insulation resistance to earth.
12.6 Electrical Supply Failure
12.6.1 In the event of electrical voltage supply failure, the appliance will
stop operating but remain in a safe condition.
12.6.2 When the electrical supply is resumed, the appliance will start from
its safe off condition and continue to operate in the normal manner
under the control of the system components. Should the appliance
fail to resume, press the RESET button to allow the safety control to
be reset. Normal operation should then continue.
Telephone: 01604 762881 1