Checking The Operating Pressure - Buderus Logano plus GB312 Installation Manual

7
Recommissioning the heating system
7.1

Checking the operating pressure

V 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.
V Refer to the information provided in the
"Water quality requirements for Logano
plus GB312" manual.
V 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: Risk of damage to system
If you fill the heating system when it is hot, the
resulting temperature stresses can cause
stress cracks. The boiler will then leak.
V Only fill the heating system when cold (the
flow temperature should be no more than
104 °F).
V Pay attention to the water quality as spec-
ified 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.
Caution: Health risk from contaminated do-
mestic water.
V It is imperative that you observe all regula-
tions and standards applicable in your
country regarding prevention of domestic
water contamination.
V Top up the heating water or drain via the boiler fill and
drain valve until the required operating pressure is
obtained.
V While filling, bleed the heating system using the radia-
tor bleed valves.
The boiler is fitted with a low-pressure sen-
sor. This prevents the boiler starting up if the
pressure is below approx. 8.7 psi.
42
Fig. 37 Pressure/temperature gauge
Fig. 38 Topping up heating water/draining via the boiler
1
Logano plus GB312 - Technical specifications are subject to change without prior notice
1
fill & drain valve
Boiler fill & drain valve
7 747 010 720-24.2RS
7 747 010 720-25.1RS