10
1.
Set the safety pressure limiter response pressure a
little higher than the setting of the pressure regula-
tor.
2.
Secure the protective cap again on the safety pres-
sure limiter to prevent any unauthorised adjust-
ment at a later time.
3.
During commissioning, adjust the pressure regula-
tor to the required operating pressure.
Never adjust the pressure regulator again after
this.
Note
Pressure regulators have one setting screw for the
switching point (e.g. 0.45 bar/45 kPa) and one for
the switching differential (e.g. 0.02 bar/2 kPa). This
means that the pressure regulator starts the burner
at 0.43 bar/43 kPa and shuts it down at 0.45 bar/
45 kPa.
Commissioning the system
According to the German Operational Safety Ordi-
nance, steam boilers with a safety pressure
in excess
of 0.5 bar/50 kPa
must be supervised. In accordance
with conformity assessment diagram no. 5 of the Pres-
sure Equipment Directive, these boilers must be
classed as category III. Prior to commissioning, the
system must be tested by an approved inspection
body (e.g. TÜV [Germany]).
Details provided by the burner manufacturer and
regarding accessories
0
1.
Open the boiler door.
0
2.
Check that the turbulators are fully inserted into
the hot gas flues (see page 14).
0
3.
Check that the ventilation air aperture in the instal-
lation room is open.
0
4.
Check the function of the water treatment system.
0
5.
Fill the steam boiler with treated water higher than
the low water indicator level.
See manufacturer's documentation for the
burner.
Note
Only operate steam boilers with suitable water.
For water quality requirements, see from
page 21.
0
6.
Check all fitted components, such as pipework,
valves, controllers, pumps, etc. for function and
leaks.
0
7.
Check the oil level or the gas supply pressure.
0
8.
Open the flue gas damper (if installed).
0
9.
Check that the cleaning aperture on the flue outlet
is closed.
10.
Open the shut-off valves in the oil lines (at the
tank and filter) or the gas shut-off valve.
11.
Switch ON the mains isolator, the switch for the
feedwater pump and the burner ON/OFF switch, in
that order.
Burner manufacturer's operating instructions
12.
Start the boiler with a low heating output (burner
stage 1 or partial load). Slowly ramp the burner up
to the required operating pressure.
13.
Slowly open the steam valve after the required
operating pressure has been reached.
14.
Only then should the full burner load be enabled.
15.
While the system heats up, check the correct func-
tion of all control and safety equipment.
16.
Observe the pressure and temperature measuring
devices.
17.
Check the covers for leaks and retighten if neces-
sary.
18.
Check the boiler door and cleaning cover for leaks
after approx. 50 hours run. Tighten the screws.
Commissioning, inspection, maintenance
Adjusting the pressure regulator and safety pressure limiter
5692729
