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6 720 812 900 (2014/10)Uni 3000 F
Fig. 15 Uni 3000 F 1400 kW to 1850 kW boiler (left = front of boiler)
[1] Boiler flow connection (VK)
[2] Safety flow line (VSL - connection for an on-site safety valve)
[3] Boiler return connection (RK)
[4] Test point (sensor pocket 3/4")
[5] Boiler safety assembly connection (safety devices)
Connecting the heating flow
Connect the heating system flow to the boiler flow connection
( Fig. 14 and Fig. 15, [1]).
Connecting the boiler safety assembly (accessory)
Uni 3000 F 420 kW up to 1200 kW:
Connect the safety valve and the safety equipment to the safety flow
line connection ( fig. 14, [2]).
Uni 3000 F 1400 kW up to 1850 kW:
Connect the safety valve to the safety line connection (
fig.
15
, [2])
and the safety assembly to the safety flow line connection [5].
Connecting the safety flow line
Secure the pressure relief valve to the safety line flow connection
(VSL) with bolts ( Fig. 14 and Fig. 15, [2]).
4.4.4 Filling the boiler and checking connections for leaks
Check the heating system for leaks before commissioning to ensure
there are no leaks when the system is in operation.
Fill the heating system with water ( Chapter 5.3, page 24).
Check all connections for leaks.
Pressure test the heating system.
Check flange and boiler connections for leaks.
Check the pipework for leaks.
After the tightness test, reinstate all components that were taken out
of operation.
Ensure that all pressure, control and safety equipment is functioning
correctly.
NOTICE: Risk of system damage from connecting the
wrong assemblies to the flow safety line [2].
Never connect a DHW cylinder or other heating
circuit to the flow safety connection [2].
The test pressure level is subject to the system
components and to the heating system.
Observe local standards and regulations.
NOTICE: Personal injury and/or system damage through
excess pressure when testing for leaks.
Pressure, control and safety equipment may be
damaged through excessive pressure.
When you carry out the leak test, ensure that no
pressure, control or safety equipment that cannot be
isolated from the boiler water chamber is fitted.
6 720 806 032-25.1ITL
2
5
4
3
1
NOTICE: Risk of system damage from thermal stress.
Only fill the system when cold (the flow temperature
must be no more than 40 °C).
17


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