6.2 Testing Relief Valve; 6.3 Checking Position Of Heat Exchanger Baffles; 6.4 Preparing The Heating System For Operation - Buderus Logano GB125/22 BE Installation And Service Instructions Manual

6
Placing the heating system in operation
6.2 Testing relief valve
V Make sure that no people are in the discharge area of
the pressure relief valve.
V Raise the lever on the pressure relief valve.
The pressure relief valve must open and release pressure.
If the safety valve fails to release excess pressure, it must
be replaced, because otherwise system components may
be damaged by excessive operating pressure.
6.3 Checking position of heat exchanger baffles
Prior to commissioning, check that the heat exchanger
baffles are in a horizontal position.
V Disconnect electrical supply to burner by shutting
down the controls or disengaging the emergency shut
off switch.
V Open burner door by removing the two hexagon-head
bolts at the sides.
V Slightly withdraw the heat exchanger baffles [1] from
the heat exchanger.
V Adjust the heat exchanger baffles [1] to a horizontal
position and push them back into the heat exchanger.
V Close the burner door and secure with the two hex
head bolts (tighten to approx. 90 inch - lbs.). Tighten
the hex bolts evenly to properly seal the burner door.
V Reactivate the controls.
6.4 Preparing the heating system for operation
V Turn on the fuel supply at the main shut-off valve.
V Switch on the heating system emergency shut-off
switch and/or the appropriate circuit-breaker.
6.5 Starting up the control and the burner
For further start-up steps, follow the burner start-up
sequence. Refer to the burner documentation for details.
The flue gas safety limiter (STB) comes
tripped and must be reset prior to start-up.
To reset unscrew cap on the side of the
housing and depress green button.
Replace cap.
Turn the control power switch to the ON position (2). The
burner starts up if the system is calling for heat or if you
set the controls to manual mode (
instructions).
V Select "Manual" mode
V Set the boiler-water temperature control [1] to the
desired temperature.
The GB125 comes equipped with 2 baffles
at the lower position. Do not installl additional
baffles (Fig. 33).
34 Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
Controls servicing
.
1
Fig. 33 Opening the burner door
1 Flue gas baffles in the heat exchanger
1
Fig. 34 Switching on the control
1 Boiler water thermostat
2 On/off switch
7 747 019 141-27.1RS
2
7 747 019 141-28.1RS