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Fig.20
Connecting the secondary heating
circuit
2
Fig.21
Disconnecting the secondary
heating circuit
7686707 - v.01 - 06092018
6.3.5
1. Fit the pipe supplied with the mounting frame to the domestic cold
2. Connect the domestic cold water inlet to this pipe.
3. Fit the inlet pipe for CH water to the CH return connection
4. Fit the outlet pipe for CH water to the CH flow connection
1
3
4
AD-0001385-04
6.3.6
These connections must be closed off if the secondary heating circuit is
not connected (solo use of the boiler). To do this, proceed as follows:
1. Remove the secondary heating circuit valves from the mounting
2. Place a blanking plate in the fitting (G½") and install this on the CH
3. Place a blanking plate in the fitting (G½") and install this on the CH
1
2
AD-0001207-03
6.3.7
The boiler is fitted as standard with an 12 litre expansion vessel.
If the water volume is greater than 150 litres or the static height of the
system exceeds 5 metres, an additional expansion vessel must be fitted.
Refer to the table below to determine the expansion vessel required for
the system.
Validity terms of the table:
Caution
If using synthetic pipes, follow the manufacturer's (connection)
instructions.
Carry out any welding work required at a safe distance from the
boiler or before the boiler is fitted.
Connecting the secondary heating circuit
water connection of the automatic (re)fill device.
Caution
Carry out any welding work required at a safe distance from the
boiler or before the boiler is fitted.
If using synthetic pipes, follow the manufacturer's (connection)
instructions.
Disconnecting the secondary heating circuit
Important
The blanking plates needed are supplied with the boiler.
frame.
return connection
.
flow connection
.
Connecting the expansion vessel
3-bar safety valve
Average water temperature: 70°C
Flow temperature: 80°C
Return temperature: 60°C
The filling pressure in the system is lower than or equal to the inflation
pressure in the expansion vessel.
6 Installation
.
.
AMC
27
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