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Installation
17
Condens 7000 WP – 6721841195 (2022/01)
NOTICE
Damage to appliance due to incorrect connection of safety
equipment.
When using service valves, all safety equipment must remain in
operation when the service valves are closed.
Mount the connection for the expansion vessel and safety valve
directly under the boiler and above the service valves. ( Fig. 18, p.
17).
NOTICE
Appliance fault due to insufficient cooling.
If the boiler is installed on a frame, the internal overtemperature
protection of the pump may be triggered if the cooling is insufficient
when an On/Off pump was selected.
When using insulating parts, ensure sufficient ventilation by not
mounting the rear panel.
Connect the flow and return pipe without stress to the boiler.
The diameter of the flow and return pipe must be no less than 1 ½"
( 35 mm).
To make maintenance work easier:
Install a service valve in the flow and return pipe ( Fig. 18, p. 17).
6.8.1 Connecting the gas valve
▶Connect the gas valve ( § 6.4, p. 14).
6.8.2 Installing the pump
Select the pump using the specifications as the basis (Tab. 15.2,
p. 47).
Take the required volumetric flow rate into consideration (Tab.
15.4, p. 49).
If a low loss header is not used:
Select a pump with a residual head of at least 200 mbar at the
required volumetric flow rate.
Install the pump [6] in the return line [5].
Fig. 18 Connection of heating water pipes
[1] Flow line
[2] Water pressure relief valve
[3] Service valve
[4] Gas isolator
[5] Return line
[6] Pump
[7] Fill and drain valve
[8] Expansion Vessel
[9] Dirt trap
6.9 Installing the low loss header
If the remaining head is insufficient at the required volumetric flow rate,
a low loss header [1] must be set up.
Check the specifications to find out whether it is necessary to set up
a low loss header ( § 15.4, p. 49).
Fig. 19 Setup with low loss header
[1] Low-loss header
[2] Expansion Vessel
[3] Pump
[4] Service valve
[5] Differential pressure regulator
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