REMEHA Quinta 85 Technical Information download pdf (Page 43)

8.2.4 Boiler temperature control

The Remeha Quinta 85 has electronic temperature control with flow and return

temperature sensors. The flow temperature can be adjusted between 20 and 90°C.

8.2.5 High limit temperature protection

The high limit temperature protection device switches off and locks out the boiler when

the flow temperature exceeds the high limit set point (adjustable). When the fault is

corrected, the boiler can be restarted by using the ‘reset’-key on the control panel.

8.2.6 Low-water protection (flow and content)

The Remeha Quinta 85 is supplied with a low-water protection on the basis of

temperature measurement, see Fig. 22, Boiler sensor resistance/temp graph. By

modulating back at the moment that the water flow threatens to fall too low, the boiler

is kept operating for as long as possible. In the event of low flow (F/R dt = 45°C), the

boiler will shut off and not lockout (ref. Par. 6.4).

If the boiler is fired dry, it will go to high temperature lock out, failure code 1*

8.3 External connections

All external connections (except rematic

2945 C3K) are made on the 24 way terminal

strip, located in the instrument box at the bottom of the boiler, accessed by loosening

the two screws, see Fig. 13 and Fig. 14.

Fig. 13 Terminal strip Remeha Quinta 85

04.W4H.79.00009

*) remove link to use, see Par. 8.8

BUS

(Tmax)

GND

230V

24V

PWM

230V

External interlock - volt free

Tmax

PWM

230V signal to BMS power supply live

Boiler pump or system pump (max. 1Amp)

DHW diverting valve or primary pump

Boiler run volt free (closes on run)

Common alarm volt free (opens on failure)

Not UK boiler

BUS

DHW sensor or volt free thermostat

0-10V or modulating controller

High / low ( 2nd stage) or

outdoor sensor

ON / OFF (1st stage)

Not UK boiler

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REMEHA Quinta 85 Technical Information Page 43

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