Checking The Operating Pressure - Buderus LOGANO PLUS GB312 Installation Instructions Manual

7
Commissioning the heating system
DANGER: Risk of explosion
If you can smell gas there is a risk of explosion.
▶ No open fire. Do not smoke.
▶ Avoid formation of sparks!
Do not operate electrical switches, including
telephones, plugs or door-bells.
▶ Turn off the gas cock!
▶ Open windows and doors!
▶ Do not operate any electrical switches.
▶ Warn other occupants of the building!
▶ Leave the building.
▶ From outside the building, call gas company, heating
installer or fire department.
DANGER: Risk of fatal injury due to water damage.
▶ The appliance must not be used if any part of it has
been under water.
▶ Have the appliance checked by a qualified service
contractor.
▶ Any parts of the programming unit or the gas valve
that have been under water must be replaced by a
qualified service contractor.
7.1

Checking the operating pressure

▶ Before commissioning, check the water pressure in the heating
system and adjust if necessary.
CAUTION: Risk of system damage due to scale
formation in the boiler.
▶ Refer to the information provided in the "Water
quality requirements for Logano plus GB312"
manual.
▶ Set the red needle on the temperature/pressure gauge to the required
operating pressure of at least 15 psi (applies to sealed heating
systems).
CAUTION: System damage
If you fill the heating system when it is hot, the resulting
temperature stresses can cause stress cracks. The
boiler will then leak.
▶ Only fill the heating system when cold (the supply
temperature should be no more than 104 °F).
▶ Pay attention to the water quality as specified in the
"Water quality requirements for Logano plus GB312"
manual, and record the volume and quality of the
water used to fill the system in the operator's log.
Water quality must be checked each year.
32
Fig. 37 Pressure/temperature gauge
CAUTION: Health risk from contaminated domestic
water.
▶ Observe all regulations and standards applicable in
your country regarding the prevention of drinking
water contamination.
▶ Top up the heating water or drain via the boiler fill and drain valve until
the required operating pressure is obtained.
▶ While filling, bleed the heating system using the radiator bleed valves.
The boiler is fitted with a low-pressure sensor. This
prevents the boiler starting up if the pressure is below
approx. 8.7 psi.
1
Fig. 38 Topping up heating water/draining via the boiler fill & drain valve
[1] Boiler fill & drain valve
Logano plus GB312 – 6 720 647 367 (2012/11)
7 747 010 720-24.2RS
7 747 010 720-25.1RS