36
•
QAA 88 device – space unit
Space control
•
HMI Service unit for Saphir regulator operation
(ACX84.910/ALG) – only by request
•
Outside sensorQAC34/101 – is not used
•
Thermostatic valve (Filling valve) - series VTC312
(external thread) from ESBE (minimum return water
temperaturem45
o
C) (ord. code: 5100 15 00)
•
Three-way mixing valve VBI31.20 with drive
SQK34.00
•
Heating branch sensor QAD36/101
•
Water heater thermostat type: 7K1.6R326.00A (only
in case boiler is used for HW heating)
•
HMI Service unit for Saphir regulator operation
(ACX84.910/ALG) – only by request
Equithermal control without space effect
•
Outside sensorQAC34/101
•
Thermostatic valve (Filling valve) - series VTC312
(external thread) from ESBE (minimum return water
temperature 45
o
C) (ord. code: 5100 15 00)
•
Three-way mixing valve VBI31.20 with drive
SQK34.00
•
Heating branch sensor QAD36/101
•
Water heater thermostat type: 7K1.6R326.00A (only
in case boiler is used for HW heating)
Note:
In case the equithermal control is without space effect we must suitably set P 21 parameter. If there is not
reached the desired P 103 (P 106 and P 109) space temperature we must increase the slope of heating
curve. Correct setting of heating curve slope is done by the end user. The changes do not become evidayt
immediately, but with regard to the equipment adaptability and various buildings inertia they become evidayt
after some time which might make several days.
The heating curve can be tuned by the parallel shift (parameter P 19). By increasing the value we increase
the desired heating circuit temperature thus we increase the temperature in the space. The parallel shift
parameter shifts the whole heating curve. The heating curve slope parameter only changes the slope of the
curve.
6.1.2 Safety thermostat
The safety thermostat is mounted on the left-hand side part of basement shell and it serves for boiler
shutdown in case the safety temperature has been exceeded. The safety thermostat must be set to 100 °C
temperature i.e. to the temperature higher than the set maximum boiler temperature (90
o
C). After the safety
thermostat switch-off the safety thermostat signal lamp will light up. The fuel feeder and ventilator will stop.
The safety thermostat de-blocking must be done manually – after the cover dismantling and then pressing
the trap.
In case of safety thermostat repeated switch-offs it is necessary to put the boiler out of service and find the
reason of boiler repeated overheating. After the safety thermostat switch-off the primary pump (or HC pump)
is still working.
6.1.3 Temperature sensor on the fuel feeder
If the temperature set in P26 parameter appears on the temperature sensor the fuel feed will be accelerated
in order to move the burning fuel to the burner. Once the temperature has dropped below the set value the
boiler will come back into the original regime. This security only functions in case the boiler is supplied with
electricity. If the feeder temperature hasn’t dropped within 7 minutes (preset value) the feeder will be shut
down.
6.1.4 Emergency fire-extinguishing system
In case of fuel fire penetration into the feeder (95
o
C temperature reached on the feeder) the BVTS
(TS 130, STS 20) valve opens the water inlet into the hopper in order to extinguish the burning fuel;
once the temperature on sensor has dropped by 6°C the water inlet will be closed.
