Glow-worm Flexicom hx - Manual (Page 15)

15
TEMPORARY
CONNECTION
HOSE
UNION
HOSE
UNION
SUPPLY
PIPE
CONTROL
VALVE
CONTROL
VALVE
DOUBLE
CHECK
VALVE
HEATING
CIRCUIT
DRAIN
POINT
SUPPLY
PIPE
AIR GAP
TUNDISH
CONTROL
VALVE
CONTROL
VALVE
TYPE CA BACKFLOW
PREVENTION DEVICE
BOILER
RETURN FLOW
BOILER
RETURN FLOW
HEATING
CIRCUIT
DRAIN
POINT
Method 1
Method 2
Diagram 5.5
11680
5 Water Systems - Sealed
5.17 Water Makeup
Provision should be made for replacing water loss from the
system using a make up bottle mounted in a position higher
than the top point of the system, connected through a non-re-
turn valve to the return side of either the heating circuit or the
hot water cylinder.
Alternatively, provision for make up can be made using a
filling loop.
5.18 Filling a Sealed Water System
Provision for filling the system at low level must be made, see
diagram 5.5. There must be no permanent connection to the
mains water supply, even through a non-return valve.