Installation - Centrometal PelTec 12 Technical Instructions

Installation, connection to central heating system

4.0. INSTALLATION

All local regulations, including those referring to national and European standards need to be complied
with when installing the appliance.
4.1. CONNECTION TO CENTRAL HEATING SYSTEM
All installation work must be made in accordance with valid national and European standards.
Boiler PelTec / PelTec-lambda can be built in closed and open central heating systems. In both cases
boiler can be fired with wood pellets. Installation has to be made, in according to technical standards,
by a professional who will be responsible for proper boiler operation. Before connecting boiler to
central heating system, the system has to be flushed to remove impurities remaining after system
installation. It prevents boiler overheating, noise within the system, disturbances at a pump and mixing
valve. Boiler should always be connected to central heating system by connectors, never by welding.
Figure 1. shows safe distances required for boiler cleaning and maintenance.
4.1.1. CONNECTION TO OPEN HEATING SYSTEM
In open system it is necessary to put an open expansion vessel min. 0,5 m above the height of the
highest heating body. If expansion vessel is located in a room without heating, it should be insulated.
The system pump could be connected on the inline or back line of the boiler.
4.1.2. CONNECTION TO CLOSED HEATING SYSTEM
In closed heating system it is obligatory to build in certified safety valve with opening pressure of 2,5
bar and a membrane expansion vessel. Safety valve and expansion vessel must be built in
accordance with professional rules and between safety valve and expansion vessel and boiler must
not be any valve. Schemes for possible configurations are on following pages.
Figure 7. Connections to connect the boiler to a closed heating system
1
PelTec /
PelTec-lambda
12
3
2
4
1 - Safety ventilation group connection
2 - Expansion vessel connection
20
1
PelTec /
PelTec-lambda
18-36
3
2
4
1
PelTec /
PelTec-lambda
48
3
2
4
3 - Main flow to installation
4 - Return flow from installation
Technical instructions PelTec-lambda
1
PelTec-lambda
69/96
3
4
2