Wall-Hung Atmospheric Gas Boilers of the Prime-MA Series

Atmospheric wall-mounted gas boiler Lemax of the Prime-MA series is intended for heating and hot water supply systems of residential and administrative buildings, cottages, administration and amenity buildings equipped with a water heating system with forced circulation of the coolant and forced removal of combustion products through a stationary chimney. Atmospheric wall- mounted gas boiler of the Prime-MA series was designed by the Company’s own engineering division supervised by SIT GROUP innovation development center for operating under Russian conditions.

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Description

Description

The model range - 24 kW.

The independent heat exchanger of the hot water supply circuit minimizes the cost of annual maintenance, ensures temperature stability in the hot water circuit and has a longer service life compared to a bitermic heat exchanger.

A high level of unification of components and components for all models of Lemax wall boilers.

The ability to connect the Lemax monitoring and control device together with the Lemax OpenTherm module for monitoring and managing comfort in the home (Android and IOS).

The increased volume of the combustion chamber ensures complete combustion of the gas and increases the service life of the heat exchanger.

Double level of protection against excess pressure in the heating circuit, which is provided by a built-in pressure sensor and a relief valve.

Working in systems with high hydraulic resistance makes it possible in most cases to exclude the installation of an additional pump.

Structurally protected sensors and sensors from corrosion and scale.

The extended operating voltage range of the boiler allows for stable operation of the boiler in networks with high and low voltage (185 - 245 v).

The integrated ignition transformer ensures stable spark formation and maximum smoothness of ignition.

The water pressure indicator on the LCD display provides convenient water pressure monitoring.

The ability to connect a room thermostat to adjust the temperature inside the room with high accuracy.

Reed flow sensor: the sealed contact detects the presence of a water flow, does not require regular maintenance and ensures that the hot water supply circuit is switched on at a water flow of 2 l/min, off at 1,5 l/min, which allows the use of a hot water circuit in rooms with low water pressure.

A bypass is installed in the collector group of the boiler, which protects the boiler elements from overheating when excessive hydraulic resistance appears in the heating system or when the coolant is blocked.

Ease of maintenance of the boiler due to the use of an easily removable top panel.

Name of parameters	Prime-MA24
Automatic safety controls	845 SIGMA
Rated heat output in heating mode, kW	23,4
Minimum heating capacity in heating mode, kW	9,8
Efficiency factor, %	92,5
Approximate area of the heated space, m²	240
Volume of the built-in expansion tank, l	6
Maximum natural gas consumption, m³/h	2,67
Nominal pressure of natural gas. Pa	1300-2000
Nominal pressure of liquified gas. Pa	2900
Maximum process pressure of the heat carrier, MPa	0,3
Minimum process pressure of the heat carrier, MPa	0,1
Preliminary air pressure in the expansion tank, MPa	0,1
Maximum pressure in the hot-water supply system, MPa	0,8
Specific consumption of hot water at a temperature of 25 °С, lpm	12,9
Minimum consumption of the hot-water supply system, lpm	2 (on) 1,5(off)
Temperature of combustion products.⁰ C No less than.	80
Parameters of the power supply circuit, V/Hz	230/50
Maximum power consumption, W	89
Overall dimensions:
height	770
width	430
depth	268
Mass:
net	28
gross	31

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