Buderus Logano GE315 Installation And Maintenance Instructions Manual page 34

3 System start-up
Before commissioning the heating system, check for
leaks to prevent problems during operation. Pressurise
the heating system to 1.3x bar permissible operating
pressure (observe the safety pressure of the safety
valve).
On sealed systems the pressure gauge needle (Fig. 49,
item 2) must be within the green range (Fig. 49, item 3).
Set the red needle (Fig. 49, item 1) on the pressure
gauge to the required system pressure.
Check the system water pressure
SYSTEM DAMAGE
through over pressure during leak testing.
Pressure, control and safety equipment
CAUTION!
may be damaged through excessive
pressure.
When you carry out a leak test, make
sure that no pressure, control or safety
equipment is fitted which cannot be
isolated from the boiler water chamber.
Shut off the pressure expansion vessel from the
system by closing the cap valve.
Check the connections and pipework for leaks.
Open the mixing and shut-off valves on the hot water
(primary) side.
Fill the system via an approved filling link.
Filling the heating system
Filling and refilling of the heating circuit must been
carried out by a method that has been approved by the
Water Regulation Advisory Scheme (WRAS), for the
type of heating appliances, i.e. Domestic (in-house)
Fluid Category 3. Non-Domestic (other than in-house)
Fluid Category 4. Depending on the Fluid Category the
approved method should comprise of the following:
1. Requirements Fluid Category 3 systems (fig see
right)
Control valve (stop valve) including a double check
valve on the mains cold water supply pipe
Temporary connection to e removed after filling
(filling loop)
Control valve (stop valve) on the heating system
pipework
34
Fig. 49
Item 1: Red needle
Item 2: Pressure gauge needle
Item 3: Green marking
Fig. 50
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano GE315 • Issue 02/2006
2
1
Pressure gauge for sealed systems
Requirements Fluid Category 3 systems
3