Bedienungsanleitung REMKO GPM 75 (Seite 7 von 44) (Englisch)

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Operation of the safety

thermostat and associated

interlock of the safety

thermostat (STB).

The unit cannot be restarted

without manual reset

■

Damage to electric cables

Safety thermostat(s)

Each fan in the units has a safety

thermostat (STB) for manual reset.

Operation of the safety thermostat

triggers a safety shutdown.

The thermostat is arranged in

the area of the heat exchanger in

order to monitor the temperature

at its outlet.

Blocking of the unit caused by

operation of the safety thermostat

is indicated as fault F2 at the

temperature control.

Air/gas premixture

The units are provided with a

burner with complete air/gas

premixture.

Mixture takes place in the burner

motor fan.

The air sucked in by the fan ﬂ ows

through the Venturi tube, where a

vacuum is produced, which draws

the gas.

This produces a constant air/gas

mixture. The ratio of air and gas

pressure is 1:1.

This value can be changed with

the offset regulating screw located

on the gas valve.

The gas volume is already adjusted

on delivery of the units and the

screw is sealed.

Fine adjustment can be made

with the adjusting screw on the

Venturi tube. This screw regulates

the maximum gas ﬂ ow rate and

accordingly determines the carbon

dioxide (CO2) content of the

exhaust gases.

The screw is not sealed so as to

allow the hot air heater to be

changed to a different type of gas

if necessary.

NOTE:

For offset and CO2 adjustment.

The control board of the units

controls the burner motor speed

with DC current depending on the

room heat demand.

The air and accordingly the gas

ﬂ ow rate changes with changing

speed.

The minimum and maximum fan

speeds are two values that cannot

be changed.

Fans

The circulation air fans are

switched on by the control board

time-controlled, whereby time

control starts when the main

burner is switched on.

The delayed switch on prevents

cold air from being blown into the

room.

Switching off the unit

If there is no more heat demand

(room temperature above the set

value), the control board switches

off the burner.

The burner fan continues to run

for a preset time in order to cool

the combustion chamber.

The circulation air fan (possibly

also more than one) also continues

to run time-controlled until the

heat exchanger has cooled down.

If there is a renewed heat demand

during the after-running phase,

the control board will wait for the

fans to switch off and only then

perform a reset and begin with a

new cycle.

IMPORTANT INFORMATION!

Interrupting the power supply

during burner operation or the

residual heat removal phase must

be avoided as a lack of cooling of

the heat exchanger can lead to

considerable damage.

■

Overheating of the unit with

invalidation of the warranty

■

Damage to the burner fan and

its components

ATTENTION

Before resetting a safety

device, the cause of its

operation must be located and

eliminated.

NOTE

Safety devices must not be

overridden or blocked during

operation of the unit.

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REMKO GPM 75 Seite 7

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