Combistream System And Combi - GAH S40/65 User Manual

6-1

Combistream System and Combi 65

Note
For:-
Boiler Control Panel ................ see 2-1
Connecting Control Panel ..... see p.27
Oil Connection .................... see 5-1.4
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
HEATING SYSTEM
HEATING RETURN 1” BSP
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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.
INSTALLA INST INST INST INST ALLA ALLA ALLA ALLATION - COMBISTREAM & COMBI 65 TION - COMBISTREAM & COMBI 65 TION - COMBISTREAM & COMBI 65 TION - COMBISTREAM & COMBI 65 TION - COMBISTREAM & 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.
Fig. 6-1ab Combi Boiler Schematic
6-1.2 The Combistream System
HOT WATER FEED
22mm copper
HEATING FLOW 1” BSP
HOT WATER TPR
COLD FEED TO BOILER
DISCHARGE (Tundish)
22mm copper
15mm to 22mm
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 are supplied without Accumulator or Cleanstream Combi 65E & I Combi 65E & I
Fig. 6-1b Schematic of Typical Installation - Combistream
✓ Supplied with Combistream
✓✓ Supplied with Combistream and Combi 65
MIXING VALVE
33
HOT AND WATER SOFTENER
COLD TAPS (not supplied)
DRINKING
WATER
COLD
WATER STORAGE
(Accumulator)
3
3
28/28/28T
FILLING LOOP 33
6 6 6 6 6
OUTSIDE
TAP
DOUBLE CHECK
VALVE 33
MAINS
SUPPLY
STOP COCK 33
PRESSURE REGULATING
VALVE 3 Bar 33
CLEANSTREAM 3
SCALE PREVENTION DEVICE
Not required if water softener is fitted
21
6 6 6 6 6