Halstead Hero 30 - Page 10

8
OPEN VENTED SYSTEM
9
SEALED WATER SYSTEM
•
TO
DRAIN
OFF TAP
•
COLD
WATER
STORAGE
•
OPEN
VENT
•
INDIRECT
CYLINDER
•
AUTOMATIC
AIR VENT
•
STOP
VALV
•
DRAIN
•
LOCKSHIELD
VALVE
•
*MOTORISED
VALVE
•
ISOLATING
VALVES
•
*3 WAY
MOTORISED
VALVE
•
VALVED BY-PASS
LOOP WATER
CONTENT 7
LITRES MINIMUM
•
•
PUMP
•
DRAIN
•
APPLIANCE
•
22mm
COPPER
•
15mm
COLD FEED
•
OPEN VENT
•
FEED AND
EXPANSION TANK
•
•
MINIMUM
HEAD 1.2m
*Fit either two motorised
valves, or one 3 way
motorised valve
•
MAKE UP BOTTLE
Observe minimum
static head requirements
•
AUTOMATIC
AIR VENT
•
DRAIN
COCK
•
AIR
RELEASE
VALVE
•
PUMP
•
FILL POINT
•
PRESSURE
GAUGE
•
EXPANSION
VESSEL
•
SAFETY VALVE
•
BY-PASS WITH
LOCKSHIELD
VALVE WATER
CONTENT
7 LITRES MINIMUM
HOT WATER
CYLINDER
FLOW
HEATING
CIRCUIT
RETURN
•
22mm
COPPER
*MOTORISED
VALVE
•
•
•
150mm
MAX.
•
NON
RETURN VALVE
8
•
•
Hero 1/03 TO PRINT 8/5/03 10:45 am Page 8