High / Low Control (2 X No Volt Switched Pairs) - REMEHA Quinta 85 Technical Information

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.
If the cable from the boiler sensor ior -thermostat is exceeds 3 meters, we advise you
to use our EMC-filter (Broag supply).
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 -
connected 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 - 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!
8.8 Remote alarm and boiler run indication
As standard the boiler is supplied with 2 x volt free indicators.
- Common alarm signal connect to terminals 21 and 22. Contact closed, opens on
lock out and power loss.
- Boiler run signal connect to terminals 23 and 24. Contact open, closes on boiler run.
Maximum 230 Volts, 1 amp capacity each.
Remeha Quinta 85
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