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Hot air gas heaters MONZUN are designed for ventilation and ecological heating of rooms and halls by
heated air. Available versions are in a power range from 15 kW to 60 kW with an airflow from 2500 to
3
8000 m /h in size: 15, 20, 30, 40, 50 and 60. In terms of gas extraction equipment, it is an open or closed
appliance with forced exhaust flue gas.
Appliance categories - II
Degree of electrical protection is IP40
Emission value NO
to 70 mg/kWh acc. to commission regulation (EU) 2016/2281 (Ekodesign 2021)
x
Emission class - NO
5
x
A common operating fuel for MONZUN units is:
● natural gas – ZP (G20/G25)
● propane-butane – PB (G30/G31)
● propane – P (G31)
The MONZUN heaters are in the standard version intended for installation in weather-protected
environments of class 3K3 according to EN 60721-3-3 with temperature range from 0° to +35 °C, for
spaces without explosion hazard according to EN 1127-1. The air passing through the unit and the
combustion air must not contain solid, fibrous, sticky or aggressive particles. They cannot be installed
in rooms where there is a risk of fire or explosion.
The control of the power output of the MONZUN heaters is continuous from minimum power to rated /
maximum power. The heated air flow is forced by an axial fan.
Due to the high efficiency it is necessary to install a condensate drain from the chimney, unless it is
otherwise addressed in special cases.
The heater operation is controlled by the control automatics.
After the heater is switched on, the burner fan starts to ventilate and the exchanger is ventilated with
fresh air for 30 s.
After the venting time, starting speed of the burner fan is set by the the control automatics, the burner
electrical ignition is triggered and the electromagnetic gas valve is opened. After the burner is ignited,
the speed of the burner fan is adjusted to the operating speed according to the required power.
When the heater exchanger is heated to the set temperature, the fan operating thermostat triggers the
axial air fan and the heater starts to blow heated air.
When the heater is switched off, the control unit automatically closes the electromagnetic gas valve, the
speed of the burner fan is adjusted to the ventilating speed and the exchanger is ventilated with fresh
air. The axial air fan keeps running and ensures that the exchanger cools down below the set temperature.
The function of the burner fan is monitored by the control automatics with the help of the fan motor speed
sensor.
The temperature of the exchanger is monitored by thermostats:
● Operating thermostat of ventilator (switches the axial fan ON and OFF according to set temperature)
● Burner operating thermostat (checks the correct temperature of the heat exchanger, if the set
temperature is exceeded, its shuts down the burner operation)
● Emergency thermostat (checks the maximum allowable temperature of the heat exchanger and
when this limit temperature is reached, shuts down the gas burner and activates the warning light.
Operator intervention is required to unblock the emergency thermostat. Operator should check the
heater and unblock the emergency thermostat.)
The control of the output power of the hot-air heater is carried out by the control signal 0–10 V (DC ±),
applied to the modulating terminals of the heater. If the control signal is not connected, after the heater
is switched on by the service switch, the heater switches to minimum power output.
, II
, design B
2E3B/P
2ELL3B/P
3
, C
, C
, C
23
13
33
63
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