User manual

Service setting manual

ENG

Liquid fuel boiler protection

If liquid boiler temperature drops below the minimum boiler temperature - parameter P5.1,

the mixing valve will gradually begin to close.

In case if liquid boiler temperature exceeds the maximum boiler temperature - parameter

S5.1, boiler protection is activated.

At this point, the maximum boiler temperature - parameters S2.6 and S3.6 is set for the

calculated stand-pipe temperature. The d. h. w. warming pump is also activated. The pro-

tection is deactivated, when boiler temperature drops below the maximum boiler tempera-

ture.

Control of a two-stage burner

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controlled by relay R1, and the second stage is controlled by relay R0.

The second stage is switched on, when boiler temperature drops 20°C below the switch-

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

boiler temperature.

The second stage is switched off when the temperature in the boiler is less than 4°C below



SOLID FUEL BOILER

Solid fuel boiler protection

If solid boiler temperature drops below the minimum temperature - parameter P5.2, the

mixing valve will gradually begin to close. In case if solid boiler temperature exceeds the

optimal operation temperature, the controller proportionally increases the calculated stand-

pipe temperature.

In such way boiler overheating is prevented and the surplus heat is dissipated into the

building.

If solid fuel boiler temperature exceeds the maximum boiler temperature - parameter

S5.13, the mixing valve gradually opens up to the maximum stand-pipe temperature -

parameters S2.6 and S3.6. The protection is deactivated, when boiler temperature drops

below the maximum boiler temperature.

HEAT ACCUMULATOR

If temperature of heat accumulator drops below the set minimum heat accumulator tem-

perature (parameter P5.3), the mixing valve will gradually begin to close. If heat accumula-

tor temperature exceeds the maximum heat accumulator temperature (parameter S5.13),

the heat accumulator overheating protection is activated, which opens the mixing valve

up to the maximum stand-pipe temperature (parameters S2.6 and S3.6). The protection is

deactivated, when heat accumulator temperature drops below the maximum temperature.