Operating instructions

Expansion Vessel
The expansion vessel is pre-charged to 0.7 bar (10 Iblin2).
The vessel is suitable for systems up to 145 litres capacity.
For systems of greater capacity an additional expansion
vessel will be required. Refer to the chart below and BS 7074
pt 1 or BS 5449.
Filling Point
Provision must be made to be able to charge the system on
commissioning and to make up any subsequent pressure
loss.
The method of connection must utilise approved equipment
and must comply with the water regulations. A filling loop can
be so installed as to be hidden beneath the boiler.
Pressure ’
System capacity chart
2,o
13
128
1.7
1-6
1,5
l-4
I,3
12
I,1
1.0
0,9
0,8
0,7
Litres
Fig. 20
MAINTENANCE
In order to ensure that the CALYDRA continues to operate efficiently and safely, it is essential that it is maintained annually.
Servicing and repairs should only be carried out by a competent engineer.
Any part replaced should be genuine Chaffoteaux et Maury spare parts.
For details refer to the separate Maintenance and Servicing Instructions.