Glow-worm SUSTAIN 25c -A User Manual

5 Installation
12 Installation and maintenance instructions SUSTAIN ..c 0020200954_00
5 Installation
5.1 Preparing for installation
Danger!
Risk of scalding and/or damage due to
incorrect installation leading to escaping
water.
Stresses in the supply line can cause leaks.
▶ Make sure there is no voltage in the sup-
ply lines when they are installed.
Caution.
Risk of damage caused by corrosion.
If non-diffusion-tight plastic pipes are used in
the heating installation, this may cause air to
enter the heating water and corrosion of the
heat generation circuit and the boiler.
▶ If using non-diffusion-tight plastic pipes
in the heating installation, separate the
system by installing an external heat ex-
changer between the boiler and the heat-
ing installation.
Caution.
Risk of material damage due to heat trans-
fer during soldering.
▶ Do not solder the connection pieces if
the connection pieces are screwed to the
service valves.
Caution.
Risk of damage caused by incorrect gas
installation.
Excess test pressure or operating pressure
may cause damage to the gas valve.
▶ Check the leak-tightness of the gas valve
using a maximum pressure of 1.1 kPa
(110 mbar).
▶ Flush the heating installation thoroughly prior to installa-
tion.
▶ Check that the volumetric capacity of the expansion ves-
sel is sufficient for the system volume.
▶ If the volume of the expansion vessel is insufficient, in-
stall an additional expansion vessel, connected as close
to the product as possible, in the heating return.
▶ If you are installing an external expansion vessel, either
fit a non-return valve in the product outlet (heating flow)
or decommission the internal expansion vessel. Other-
wise, the warm start function may be more frequently ac-
tivated because of backflow, which causes unnecessary
energy loss.
▶ Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
▶ Install the following components:
– A hot water safety group and a stop cock on the cold
water connection
– A filling device between the cold water connection
and the heating return
– A stop cock in the gas line
5.2 Gas and water connections
1 2 3 4 5
1 Heating flow connection
2 Hot water connection
3 Gas connection
4 Cold water connection
5 Heating return connec-
tion
1. Connect the water and gas connections in accordance
with the applicable standards.
2. Purge the gas line before start-up.
3. Check whether the connections (→ Page 21) are leak-
tight.
5.3 Connecting the drain line for the expansion
relief valve
1
▶ Ensure that the pipeline is visible.
▶ Connect the expansion relief valve (1) to a suitable drain
siphon. Use the supplied discharge pipe for this.
◁ The components must be set up in such a way that
you can see the water flowing out.

Glow-worm SUSTAIN 25c -A Specifications

General

Brand	Glow-worm
Model	SUSTAIN 25c -A
Category	Boiler
Language	English