21
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
Combistream System and Combi 65
6-1.1 The Combi Boiler Design
The Burner (8) heats the water in the heat exchanger (1), heated water from there is
pumped to either the heating system or the hot water system or both, controlled by a
motorised valve (5) which operates in response to the system external controls.
When hot water is required, the heated water is directed through the plate heat exchanger
(3), then through the coil of the indirect hot water cylinder (2), then returning to the
Boiler. The plate heat exchanger (3) heats the incoming cold supply (C) before it enters
the indirect hot water cylinder (2) resulting in quicker production of hot water for the taps
(D).
There is 60 litres of hot water stored, therefore the production of hot water can be timed to
prevent the Boiler running during periods when demand for hot water is low, e.g. at night.
Note
For:-
Boiler Control Panel ................ see 2-1
Connecting Control Panel ..... see p.27
Oil Connection .................... see 5-1.4
Fig. 6-1ab Combi Boiler Schematic
A
HEATING FLOW
B
HEATING RETURN
C
COLD MAINS SUPPLY FROM ACCUMULATOR
D
HOT SUPPLY TO TAPS VIA MIXING VALVE
1.
BOILER HEAT EXCHANGER
2.
INDIRECT CYLINDER HOT WATER STORAGE - 60 LITRES
3.
PLATE HEAT EXCHANGER
4.
CIRCULATING PUMP
5.
3 WAY MOTORISED VALVE
6.
HEATING SYSTEM EXPANSION VESSEL
7.
HOT WATER SYSTEM EXPANSION VESSEL
9.
MIXING VALVE
8.
BOILER BURNER
6-1.2 The Combistream System
BYP
ASS
MAINS
SUPPLY
OUTSIDE
TAP
DOUBLE CHECK
VALVE
33
STOP COCK
33
HOT AND
COLD TAPS
COLD FEED TO BOILER
22mm copper
HOT WATER FEED
22mm copper
HEATING RETURN 1 BSP
HEATING FLOW 1 BSP
HOT WATER TPR
DISCHARGE (Tundish)
15mm to 22mm
PRESSURE REGULATING
VALVE 3 Bar
33
FILLING LOOP
33
WATER SOFTENER
(not supplied)
COLD
WATER STORAGE
(Accumulator)
3
HEATING SYSTEM
DRINKING
WATER
28/28/28T
3
CLEANSTREAM
3
SCALE PREVENTION DEVICE
Not required if water softener is fitted
MIXING VALVE
33
Fig. 6-1b Schematic of Typical Installation - Combistream
No in loft header feed tanks required.
Boiler can be located in dwelling, outhouse, garage or basement.
Minimum pipework required.
60 litres of stored hot water.
Mixing Valve ensures consistent hot water temperature.
Combi 65E & I
Combi 65E & I
Combi 65E & I
Combi 65E & I
Combi 65E & I are supplied without Accumulator or Cleanstream
Combistr
Combistr
Combistr
Combistr
Combistream extra featur
eam extra featur
eam extra featur
eam extra featur
eam extra features:-
es:-
es:-
es:-
es:-
At least 40 litres of stored cold water.
Cold water storage (accumulator) can be located in
dwelling, outhouse, garage, loft or basement.
All taps and showers are at maximum ‘system pressure’.
Balanced hot and cold water supply pressures.
No pressure drop when one tap is in use.
Completely sealed hot and cold water systems.
Wholesome water to all cold taps.
No tank filling noise.
66666
✓
Supplied with Combistream
✓✓
Supplied with Combistream and Combi 65