Technical information

7
RETURN
FLOW
SECONDARY
RETURN
COMBINATION
VALVE
EXPANSION RELIEF
PIPE
COLD
MAINS-IN
22mm
DRAIN
EXPANSION
VESSEL
PRESSURE + TEMPERATURE
RELIEF VALVE
ZONE
VALVE
HOT SUPPLY
22mm
TUNDISH
22mm
MAX. 100mm
FIG. 2.3
C
ONTRACT STI 125-150-210-300 INDIRECT
SECONDARY
RETURN
COMBINATION
VALVE
EXPANSION RELIEF
PIPE
COLD
MAINS-IN
28mm
DRAIN
EXPANSION
VESSEL
PRESSURE + 
TEMPERATURE
RELIEF VALVE
HOT SUPPLY
28mm
TUNDISH
22mm
MAX. 100mm
FIG. 2.4
H
IGH CAPACITY 500 STD UK DIRECT
RETURN
FLOW
SECONDARY
RETURN
COMBINATION
VALVE
EXPANSION RELIEF
PIPE
COLD
MAINS-IN
28mm
DRAIN
EXPANSION
VESSEL
PRESSURE + 
TEMPERATURE
RELIEF VALVE
ZONE
VALVE
HOT SUPPLY
28mm
TUNDISH
22mm
MAX. 100mm
FIG. 2.5
H
IGH CAPACITY 500 STI UK INDIRECT