Description Of The Product; General Description; Operating Principle; Main Components - Baxi Prime 1.24 Installation Manual

4.

DESCRIPTION OF THE PRODUCT

4.1 General description

This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure. It must be
connected to a central heating system and to a domestic hot water supply system according to its performance and power output.
The characteristics of this boiler are:
• low polluting emissions;
• high-performance heating;
• discharge of combustion products by means of a concentric exhaust connector or separate flue-air ducts;
• front control panel with display;
• minimal weight and size.
4.2

Operating principle

4.2.1 Combustion
The burner heats the heating water that circulates in the heat exchanger. When the temperature values of the combustion
gases are below the dew point (about 55 °C), the water vapour in the combustion gas condenses in the gas section of the heat
exchanger. Heat recovered during this condensation process (latent heat or condensation heat) is transferred to the heating water.
The cooled combustion gases flow out through the flue duct. The condensation water, instead, passes through a siphon.
4.2.2 Heating and production of domestic hot water.
Boilers for heating and the production of domestic hot water are fitted with an integrated plate exchanger that heats the domestic
water. The heated water flows through a three-way valve to the heating system or to the plate heat exchanger. A flow detector
signals the opening of a hot water tap to the electronic board which turns the three-way valve to its hot water position and starts the
pump. The three-way valve is spring-loaded and requires electrical power only when it switches position. Priority is given to DHW.
4.3

Main components

1. Heat exchanger (Heating)
2. Hydraulic unit
3. Plate exchanger
4. Safety valve
5. CH circuit water flow / DHW
tank
6. DHW outlet
7. Domestic cold water inlet
8. CH circuit water return
9. Pump
10. Three-way valve
11. Filling tap
12. Cold water inlet with system
filling tap
13. DHW tank return (G3/4")
PRIME 24-28
2
4
5 6 7 12
7
1
9
10
M
3
4
11
8 5 13
PRIME 1.24
1
9
10
M
11
12 8
BO-0000144
7679406 (01-05/17)