Table of Contents
Advertisement
4.6 Pipe Dimensions and Water Pressure
The requirements recommended for the pipe dimensions and
water pressure are as follows:
The connection diameter for the domestic cold water inlet
●
must be at least Ø15 mm.
If a shut-off valve is fitted at the domestic cold water inlet, it
●
must have a safety valve incorporated, calibrated to 9 bar.
For DHW production installation, the inlet pressure must be
●
over 0.5 bar.
For hot water supply to the second floor of a building, the
●
minimum pressure required is 1.0 bar.
The pipe diameter is not determined by the boiler connection
●
but must be calculated in accordance with its length and
consequent pressure drop.
4.7 Pressure Relief Valve
The requirements recommended for the pressure relief valve are
as follows:
The pressure relief valve is calibrated to be activated at a
●
maximum pressure of 3 bar, and all the pipes and connections
must therefore be able to withstand pressures of up to 3 bar.
Connect the pressure relief valve drain to a tube with a
●
diameter of at least Ø15 mm. It must tilt in a downstream
direction throughout its entire length, and the water must run
off to a suitable drain. It must be positioned so as not to cause
damage to cabling, electrical equipment or persons.
The drain must not be located above a window, entry door or
●
any other public access point. Bear in mind that boiling water
or steam could come out when draining.
4.8 Filling the System
Follow the instructions to fill the boiler system.
1. Before filling the boiler pipes, unscrew the air vent cap to
allow the pipes to fill properly. Screw up the cap when the
pipes are full.
2. Pull the green lever down to fill the boiler pipes, until the
pressure reaches between 1.0-1.5bar
3. If the pressure is filled, release the green lever and press the
air vent cap back.
To perform an air purge after the first filling of the boiler pipes,
the pump runs for 5 minutes and 20 seconds. The boiler will
operate normally after performing an air purge. (If the pressure
drops off during air purge, re-fill the boiler pipes.)
Ensure that the air vent cap is fitted before testing
Note
●
or operating the system.
If additional air purge is necessary, access the
●
advanced menu and use the manual air purge mode.
- Press the Back button (
button (
) simultaneously for 3 seconds,
and then select "6. Air Purge Mode". (Manual air
purge operates for 15 minutes)
Air Vent Cap
Green Lever
) and the Menu
Installing the System Piping
41
Advertisement
Table of Contents
