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Multiple Quinta Pro boilers, heating only, outside weather or room
compensation with the Celcia MC4 and iSense controller with a low
loss header (Optimising/weather compensated)
Power Supply
• Boilers require a permanent 230v single phase supply fused at 6.3 amps connected to the
factory fitted fly lead
Boiler Interlocks
(for pressure switches etc.)
• Safety Interlock - remove the existing link and fit volt free switch pair to BL on the main
control PCB. If the circuit is open the boiler will go to a shut down mode displaying code
9 and will restart when the circuit is closed
Indication Controls
(to report actual function)
• Common Alarm - volt free relay on SCU-X01 (see boiler manual for full details)
• Boiler Run - volt free relay on SCU-X01 (see boiler manual for full details)
Fitting the Controls
• Fit the iSense controller in a normally occupied reference room within the building being
heated if room and weather compensation is required. If weather only is required,
the iSense can be fitted in a boiler control panel. Install the MC4 controller adjacent
to the boiler plant and connect as shown
• Install the outside sensor on a North facing wall, and connect to the MC4
(for weather compensation only)
Boiler Control Settings
(see 5.7.2 in technical documentation)
• Set boiler code P1 to the required flow temp i.e. 80 = 80ºC (system design requirements)
• Boiler will recognise the type of control setting used
• Set up the controller to suit the design requirements and occupancy times for HTG in
accordance with the instruction documents supplied with the controller
Note:
Installation can be designed without the use of a low loss header. Omit the header and
shunt pumps. A heating pump must be capable of overcoming the combined resistance of the
boiler, system and pipe work.
A reverse return with a common loop and single primary pump would be suitable.
