Double-pressure 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

Produced using European components of the following suppliers: SIT, OTMA, WILO, POLIDORO, Valmex, NordGas.

Ideally suited for installing both in apartments and houses with a stationary chimney.

Efficiency output is up to 92,5%.

Adapted to gas pressure loss.

Independent heat exchanger of the hot water circuit minimizes the cost of annual maintenance, provides temperature stability in the DHW circuit and has a longer service life compared to a bi-thermal heat exchanger.

A high unification level of parts and components for the entire line of Lemax wall-mounted.

Implemented control function through iOS and Android via the OpenTherm Protocol allows the remote control for home or an apartment.

Increased combustion chamber volume ensures complete gas combustion and extends the operating lifetime of a heat exchanger.

A built-in pressure sensor and a blow-off valve provide dual protection against heating circuit overpressure.

Operating in high hydraulic resistance systems avoids installing an additional pump in most cases.

Structurally protected sensors against corrosion and boiler scale.

Extended range of boiler operating voltage ensures stable operation in power grids with high and low voltage (186 - 245 v).

Integrated ignition transformer ensures stable spark generation and maximum smoothness of the ignition.

Water pressure indicator displayed on the LCD provides comfort of monitoring water pressure.

Reed flow sensor: the sealed contact detects water flowing without regular maintenance and provides start-up of hot water circuit when the water flow is 2 l/min, its shutoff at 1.5 l/min, and provides using the DHW circuit with low water pressure.

A bypass installed in the boiler manifold unit protects boiler elements from overheating when excessive hydraulic resistance in the heating system or when the coolant is blocked.

Boiler accessibility due to the removable top panel.

Ability to switch to a liquid gas.

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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