16
Installation and maintenance instructions EASICOM 3 0020238431_03
7
Installation
7.1
Preparing for installation
▶
Make sure that the existing gas meter and the pipelines
are capable of passing the rate of gas supply required.
▶
Consider the maximum heat output given in DHW mode.
▶
Install the following components:
–
Draining cocks at the lowest points in the heating
installation (
→
current version of "BS 2879")
–
A bypass that is at least 1.5 m away from the product
–
A stopcock in the gas pipe
–
Where applicable, a flow regulator valve to adjust the
flow rate
▶
Install the connection pipes such that they are free from
mechanical stress.
▶
If you use non-diffusion-tight plastic pipes in the heating
installation, ensure that no air gets into the heat gener-
ator circuit.
▶
Only solder connectors if the connectors are not yet
screwed to the service valves.
▶
Only bend connection pipes if they have not yet been
connected to the product.
▶
Flush the heating installation thoroughly before installing
the product.
▶
Check the leak-tightness of the gas valve assembly using
a pressure of
≤
11 kPa (110 mbar).
7.2
Installing the heating pump
The flow rate must not fall below the value in the diagram.
▶
Only use pumps that have an in-rush current
≤
10/15 A.
▶
When designing/selecting the pump, note the pressure
loss of the product.
▶
Install the pump in the heating flow.
▶
Install the pump upstream and downstream of the pump
isolation valves.
▶
Set the pump so that the temperature difference between
the flow and return is no more than 20 °C when the max-
imum flow temperature is set.
–
The flow rate specified in the technical data is
reached.
7.3
Heating water supply in the open heating
system
▶
Connect the product to a supply/expansion tank as
shown in the figure.
–
The tank must not be more than 27 m (90 ft) above
the product.
–
The open vent pipe must be installed with an upward
gradient and must not be blocked.
–
Supply pipe diameter:
≥
15 mm
–
The relative positions of the pump, supply and open
vent pipe must be as shown in the figure.
Condition
: Combined supply and open vent pipe
▶
Install the line in accordance with "BS 5449".
–
Diameter:
≥
22 mm
