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static head of the system, that is, the height of
the highest point of the system above the ex-
pansion vessel.
The water content of the boiler is given in
Vessel charge and initial system pressure
Total water content of system using 8 L (1.54 gal) capac-
ity expansion vessel supplied with appliance
For systems having a larger capacity multiply the total system
capacity in litres (gallons) by these factors to obtain the total mini-
mum expansion vessel capacity required in litres
Fig. 5.6
Sealed water system
ROOM
THERMOSTAT
FLOW
RETURN
Fig. 5.7
GENERAL REQUIREMENTS
Expansion vessel requirements
TANK
THERMOSTAT
HOT WATER
CYLINDER
SAFETY
VALVE
CH/DHW
DRAIN
2 CHANNEL
COCK
PROGRAMMER
CH/DHW
SWITCHED LIVE
section "Technical data ADVANCE 15OV" on
page 24, section "Technical data ADVANCE
18OV" on page 27 and section "Technical
data ADVANCE 24OV" on page 30.
bar
0.5
L
96
0.0833
MAKE UP BOTTLE
Observe minimum
static head requirements
AUTOMATIC
AIR VENT
NON RETURN
VALVE
MOTORISED
SYSTEM
BYPASS
LOCKABLE
BALANCING
TERMINAL
BOLCK
VALVE "A"
0.75
1.0
84
73
0.093
0.109
AIR RELEASE
VALVE
VALVE
3-WAY
VALVE
FILL POINT
NON-RETURN
VALVE
PRESSURE
PUMP
GAUGE
EXPANSION
APPLIANCE
1.5
50
0.156
VASSEL
- 39 -
- 39 -
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