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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"
(Ø 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 ( § 6.5.1, p. 15).
6.8.2
Installing the pump
▶ Select the pump using the specifications as the basis ( Tab. 16.3,
p. 49).
▶ Take the required volumetric flow rate into consideration ( Tab.
16.3, 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].
Condens 7000 WP – 6721842519 (2022/03)
1
5
2
4
6
3
3
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 ( § 16.3, 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
Installation
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8
9
3
3
0010018400-003
2
1
3
4
5
4
0010018401-003
17
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