22
IMPORMPORMPORMPORMPOR
TANT NOTESTANT NOTESTANT NOTESTANT NOTESTANT NOTES
DO NOT MODIFY ANY OF THE PIPEWORK INSIDEDO NOT MODIFY ANY OF THE PIPEWORK INSIDEDO NOT MODIFY ANY OF THE PIPEWORK INSIDEDO NOT MODIFY ANY OF THE PIPEWORK INSIDEDO NOT MODIFY ANY OF THE PIPEWORK INSIDE THE BOILER CASE.THE BOILER CASE.THE BOILER CASE.THE BOILER CASE.THE BOILER CASE. PPPPPipe runs should be kept to a minimum.ipe runs should be kept to a minimum.ipe runs should be kept to a minimum.ipe runs should be kept to a minimum.ipe runs should be kept to a minimum. Hot water pipes to the taps should be insulated.Hot water pipes to the taps should be insulated.Hot water pipes to the taps should be insulated.Hot water pipes to the taps should be insulated.Hot water pipes to the taps should be insulated. All cold supply pipes should be insulated.All cold supply pipes should be insulated.All cold supply pipes should be insulated.All cold supply pipes should be insulated.All cold supply pipes should be insulated. The life of the Plate Heat Exchanger and MixingThe life of the Plate Heat Exchanger and MixingThe life of the Plate Heat Exchanger and MixingThe life of the Plate Heat Exchanger and MixingThe life of the Plate Heat Exchanger and Mixing VVVVValve will be gralve will be gralve will be gralve will be gralve will be gr
eatly reatly reatly reatly reatly r
educed if scale is evident,educed if scale is evident,educed if scale is evident,educed if scale is evident,educed if scale is evident,
scale prscale prscale prscale prscale pr
otection MUST BE PROotection MUST BE PROotection MUST BE PROotection MUST BE PROotection MUST BE PRO
VIDED.VIDED.VIDED.VIDED.VIDED.
FrFrFrFrFr
ost prost prost prost prost pr
otection must be protection must be protection must be protection must be protection must be pr
ovided for theovided for theovided for theovided for theovided for the
Accumulator parAccumulator parAccumulator parAccumulator parAccumulator par
ticularly when it is sited in a loft,ticularly when it is sited in a loft,ticularly when it is sited in a loft,ticularly when it is sited in a loft,ticularly when it is sited in a loft,
garage or outhouse.garage or outhouse.garage or outhouse.garage or outhouse.garage or outhouse. FrFrFrFrFr
ost prost prost prost prost pr
otection must be protection must be protection must be protection must be protection must be pr
ovided for the Boilerovided for the Boilerovided for the Boilerovided for the Boilerovided for the Boiler
when it is sited in a garage or outhouse.when it is sited in a garage or outhouse.when it is sited in a garage or outhouse.when it is sited in a garage or outhouse.when it is sited in a garage or outhouse. All components must be fitted inside the dwelling.All components must be fitted inside the dwelling.All components must be fitted inside the dwelling.All components must be fitted inside the dwelling.All components must be fitted inside the dwelling.
Fig. 6-1c Combistream System Design
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
6-1.3 Combistream System Design
BYPASS
COLD WATER STORAGE
(Accumulator)
STOP COCK
DOUBLE CHECK VAL
VE
PRESSURE REGULATING VAL
VE
Suggested servicing valve each side.
WATER SOFTENER
OUTSIDE TAP
COLD TAPS
HOT TAPS
TUNDISH
Dischar
ge
22mm
HOT WATER STORAGE TPR VAL
VE
COLD SUPPL
Y TPR VAL
VE
PLATE HEAT EXCHANGER
MOTORISED VAL
VE
PUMP
BOILER TPR VAL
VE
Plumbed to outside building 15mm
BOILER PRESSURE GAUGE
HEATING SYSTEM EXPANSION VESSEL
HOT WATER SYSTEM EXPANSION VESSEL
FILLING L
OOP
HEATING SYSTEM
REGULATING VAL
VE
Adjusted to r
educe flow.
Never to be closed when heating system is on.
or
AUTO
BYPASS
VAL
VE
MANUAL AIR VENTS
CLEANSTREAM
SCALE PREVENTION DEVICE Servicing valve r
equir
ed each side.
DRINKING WATER
MIXING VAL
VE
BYPASS
V
alve Normally Closed
A ‘Cleanstr
eam’ scale pr
evention device is supplied, this
must
be
fitted unless a water softener is fitted; if a water softener is fitted
then the Cleanstr
eam unit should not be fitted.
In ar
eas known to have har
d water
, a water softener is str
ongly
recommended.
On systems with a long r
eturn run for the central heating, a
second pump can be fitted to the heating r
eturn. This must be
wir
ed independently to the Boiler pump.
A pr
essur
e r
egulating valve is supplied set at 3 Bar
, this must be
fitted and r
emain set at 3 Bar
.
A Themostatic Mixing V
alve is supplied, this
must be fitted in the
hot water supply to the taps, inside the dwelling.
Combi 65I & E ar
e supplied without Accumulator or Cleanstr
eam
Boiler operationBoiler operationBoiler operationBoiler operationBoiler operation
When the system contr
ol is set for heating:-
The Boiler pump runs at all times.
The Boiler Burner will operate when the temperatur
e of the water within
the Boiler heat exchanger falls below the Boiler’s heating contr
ol setting.
When the system contr
ol is set for hot water:-
The pump and Burner will run when the temperatur
e of the water within
the hot water storage cylinder falls below the Boiler hot water contr
ol
setting.
The hot water temperatur
e at the taps is contr
olled by the Mixing Valve.
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