36
Instructions for the installer
3.14 Starting up the boiler
3.14.1 Preliminary checks
Before starting the boiler, check that:
• The flue gas venting duct and the relevant terminal are installed in conformity with the instructions: with the boiler operating, there must
be no leakage of combustion by-products from any of the gaskets.
• The supply power to the boiler must be 230 V ~ 50 Hz.
• the heating system is correctly filled with water (pressure gauge reading 1÷1.3 bar).
• Any shut-off cocks in the system pipes are open.
• the mains gas type is correct for the boiler calibration: convert the boiler to the available gas if necessary (see
Adaptation to other gas types
and burner adjustment
on page
39
). This operation is to be exclusively carried out by qualified personnel.
• The gas supply cock is open.
• There are no fuel gas leaks.
• The main switch installed adjacent to the boiler is turned on.
• The 3-bar safety valve is not stuck.
• There are no water leaks.
3.14.2 Switching on and switching off
To switch the boiler on and off, refer to the “Instructions for the User” (see
Instructions for the user
on page
8
).
3.15 Available head
The boiler is equipped with a high-efficiency circulation pump.
Circulation pump speed can be set during heating and DHW modes, editing the relevant "super technical" parameters of the boiler.
WARNING
Circulation pump operating speeds are set during production.
For a correct operation of the boiler, it is recommended not to change factory setting.
Should it be necessary to change circulation pump settings, contact a Service Centre.
0
100
200
300
400
500
600
0
200
400
600
800
1000
1200
1400
H
Q
100%
30%
Fig. 10 Available head
Q . . . . . . . . . . . . . . . . . Flow rate (l/h)
H . . . . . . . . . . . . . . . . . Available head (mbar)
Summary of Contents for DELFIS Monothermal
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