CIAT Major CH, Manual

Page: 30 / 128

EN-4
Installation
• To avoid damaging this connection or the CIAT valve, never tighten to
more than 3.5 daN.m of torque. Use 2 spanners, one to hold and the other
to tighten, to ensure the seal of the valve connection is maintained
Always fit the valve in the right direction. The direction of flow for these CIAT valves should be
A
➝ ➝
AB (A being connected to the coil and AB to the hydraulic network). The maximum
allowable differential pressure for our valves (open or closed) is 100 kPa. CIAT recommends
not exceeding 60 kPa.
Recommendations on hydraulic connections
The design
of a hydraulic network is crucial to the correct operation of the system. Drain
valves should therefore be placed at the appropriate points and in sufficient number. In
addition, strainers should be fitted, as well as drains at circuit high points, balancing tees on
each Major Line and, if necessary, discharge valves.
Filtration:
An efficient filtration system (recommended efficiency of 0.5 mm) should be fitted on the supply
water and return water lines.
Flushing:
The system must be flushed completely and filled with treated water to prevent the build-up of
scale or sludge in the circuit. When flushing the system, open the valve on the unit to prevent
any sludge or scale entering the coil:
●
Thermo valves: Remove the servomotor to fit the cap, which will
cause pressure to be applied to the shaft, thereby opening the passage or request
that the valve be opened via the control.
●
3 Point modulating valves: If the power has not yet been switched on,
the valve will be open by default. Otherwise, if the power to the control device has
already been switched on, remove the servomotor, which will enable the stem to be
released and thereby open the passage.
A AB
AB A
B