On / Off Control (1 X No Volt Switched Pair); High / Low Control (2 X No Volt Switched Pairs); Dhw Control (Broag Priority); Temperature Control - REMEHA Quinta 45 Technical Information

8.4.3 On / off control (1 x no volt switched pair)

The heat output modulates between the minimum and the maximum value based on
the set flow temperature, terminal connections 3 and 4.
Set the x value of the boiler control operation parameter (A) to 1.

8.4.4 High / low control (2 x no volt switched pairs)

The heat output is controlled between part load (18%, adjustable) and full load, by
means of a two-stage controller, terminal connections 3 and 4 low fire - 5 and 6 high
fire.
Set the x value of the boiler control operation parameter (A) to 2.

8.5 DHW control (Broag priority)

8.5.1 Temperature control

With a Remeha temperature sensor or with a standard (volt free) DHW thermostat
connected to terminals 7 and 8.
NOTE: boiler will only provide a setting and read out facility with the sensor option.

8.5.2 Primary flow control

- With a three-way diverting valve - Set the DHW control option (parameter J) to
00/02 - connected to terminals 17 (230 V power open/spring returned) and 18.
- With a DHW pump - Set the DHW control option (parameter J) to 01 - connec-
ted to terminals 17 and 18 (230-1-50 max 1 amp). If the DHW pump requires more
than 1 amp, terminals can only be used to switch a pump relay.

8.6 System pump

A system pump can be connected to terminals 19 and 20 (230-1-50 Max. 1 amp). If
the system pump requires more than 1 Amp, terminals can only be used to switch a
pump relay.

8.7 Frost protection

Install the boiler in a frost-free room. If the boiler water temperature drops below 7°C,
the built-in frost protection sytem is activated as follows:
- below 7°C: system pump is switched on if connected to boiler;
- below 3°C: boiler is switched on;
- when the flow temp reaches 10°C the boiler and pump switch off
Attention: this function only works for the boiler, not for the installation!
48
Remeha
Quinta 45/65