27
M I X
C0LD
HOT
INST
INST
INST
INST
INSTALLA
ALLA
ALLA
ALLA
ALLATION - COMBISTREAM & COMBI 65 6
TION - COMBISTREAM & COMBI 65 6
TION - COMBISTREAM & COMBI 65 6
TION - COMBISTREAM & COMBI 65 6
TION - COMBISTREAM & COMBI 65 6
6-3.2 Thermostatic Mixing Valve
A Thermstatic Mixing Valve is supplied with the Combistream system and the Combi 65.
It should be fitted between the Boiler Hot Water outlet and the draw off (taps). The valve
mixes hot water from the Boiler’s hot water storage with cold water from the accumulator
to provide hot water at the taps at a consistent temperature.
The valve is supplied with two Check Valves which must be fitted to the hot and cold
supply.
It is recommended to fit a service valve on each of the three pipes to the valve.
1
2
3
Fig. 6-3c Phial Positions
HEATING LIMIT
POSITION 1 OR 2
HEATING CONTROL
POSITION 1 OR 2
HOT WATER LIMIT
POSITION 3
HOT WATER CONTROL POSITION 3
6-3.3 Connection to the Boiler - Pipework
When all pipework has been installed, disconnect from the Combistream or Combi 65
components and flush all pipework thoroughly.
All Boiler components and pipework are checked at the factory prior to despatch,
however always check the connections for leaks on commissioning as transportation and
installation can cause joints to move.
6-3.4 Connecting the Control Panel
Combi Boilers are despatched with the Control Panel fitted. The phials of the two heating
thermostats are inserted vertically into the pockets situated on either side on the top of
the Boiler heat exchanger. The phials of the two hot water thermostats are inserted
horizontally in the hot water cylinder, see fig. 6-3c.
Connections have to be made for the remote heating and hot water control system - see
wiring diagram on page 51.
6-3.5 Combi 65 External Boilers
A constant power supply is required for frost protection.
External Combi Boilers require a suitable base, this must be level, impervious to
kerosene and non-combustible.
All pipes must be fully protected and insulated.
Cables must be suitable for outside and/or underground use.
The Thermostatic Mixing Valve and Pressure Regulating Valve supplied with the Boiler
must be fitted inside the dwelling.
Fig. 6-3b Thermostatic Mixing Valve
MIX - CONNECTED TO
DRAW OFF (TAPS)
HOT OR COLD AS
MARKED
CHECK VALVE
CHECK VALVE
SERVICE VALVE
SERVICE VALVE
SERVICE VALVE
DRAW OFF (TAPS)
CHECK VALVE
CHECK VALVE
COLD
SUPPLY
FROM
COMBISTREAM
VALVE CAN BE POSITIONED IN
ANY ORIENTATION
Notes
Refer to the mixing valves manufacturer’s
instructions supplied with the valve for
further information. Put these with this
manual.
The mixing valve is not guaranteed against
corrosion or blockage caused by excessive
scale.
66666
THE VALVE MUST NOT BE FITTED
OUTSIDE THE DWELLING
