22
Multiple Quinta Pro boilers, heating and hot water priority,
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 in a sheltered position and connect to the MC4
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
Domestic Hot Water
• When using the Remeha supplied low loss header and pump kit and the hot water diverting
valve or primary pump kit, the calorifier must be sited within 3m of the boiler. In both cases,
the hot water calorifier must be a high recovery unit capable of accepting the full or adjusted
hot water output of the boiler being used (reference parameter P18)
• Set up the controller to suit the design requirements for the hot water times and temperature
