%XPANSION
VESSEL
!NTIVAC
RELIEFVALVE
0RESSUREAND
TEMPERATURE
RELIEFVALVE
#OMBINATIONINLET
VALVESET
-AINSPRESSURE
COLDCONNECTION
TOTHEAPPLIANCEAND
PRESSUREGAUGETEST
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"ALANCED
COLDSUPPLY
BAR
IFREQUIRED
-AINS
PRESSURE
COLDSUPPPLY
$ISCHARGE
PIPE
%XPANSIONRELIEF
DISCHARGE
TORUNVERTICALLYASFAR
ASPRACTICAL
4UNDISH
)MMERSION
)MMERSION
-IN
XSTREAM DIRECT
Basic Appliance - see Figure 1
1. Anti vacuum valve
2. Temperature and Pressure relief valve
3. 1¾” x 3kW on peak (boost) upper
immersion heater (incalloy) complete
with control and overheat thermostats
4. 1¾” x 3kW off peak lower immersion
heater (incalloy) complete with control
and overheat thermostats
5. ½” BSP (M) - for connection to the potable
expansion vessel
6. 22mm copper - for connection to the 1½
bar cold feed from the combination inlet
group
7. ½”BSP (F) connection - for drain valve (not
supplied)
8. 22mm copper - connection for hot water
supply
Component kit supplied separately:-
1. Combination valve incorporating pressure
reducing valve, strainer, cold water
connections, expansion relief valve and
check valve
2. Potable water expansion vessel
3. Tundish
4. Installation instructions
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Page 5
SYSTEM DESIGN
Xs
tr
eam
