6
4.2 Operation principle
The product is used to heat and store hot water for
use in domestic applications.
4.3 Standard delivery
`
Product
`
Fixing bracket
`
Screw pack
`
Instructions
4.4 Mains connections
See figure 4-6 below.
4. Description of the product
4.1 General description
This product is a purposed designed unvented water
heater. The product has a copper inner vessel,
which ensures an excellent standard of corrosion
resistance. The outer casing is a combination of
resilient thermoplastic moldings and painted steel.
The product is supplied complete with all the necessary
safety and control devices needed to allow connection
to the cold water mains. These components are preset
and should not be tampered with.
Temperature
and pressure
relief valve
Temperature
and pressure
relief valve
Pressure
relief
(expansion)
valve
Note: If pressure reducing valve is
used expansion down the mains is not possible
Pressure
relief
(expansion)
valve
Pressure
relief
(expansion)
valve
Expansion
vessel
Expansion
vessel
Service valve
Service valve
Hot
Cold
Hot
Cold
Check
Valve
Check
Valve
Check
Valve
Nearest cold
draw off
Nearest cold
draw off
Nearest cold
draw off
Service valve
(fixed jumper or
1/4 turn ball type)
Cold
water
mains
Cold
water
mains
Cold
water
mains
Tundish
Tundish
Tundish
Multipoint
10 litre
or 15 litre
heater
Multipoint
10 litre
or 15 litre
heater
Temperature
and pressure
relief valve
Hot
Cold
Multipoint
10 litre
or 15 litre
heater
To drain (waste)
To drain (waste)
To drain (waste)
2.8 (10 l) or 4.2 (15 l)
metres is required for
expansion in pipework
Figure 4 – For inlet pressure up to 0.41 MPa (4.1 bar)
Figure 5 – For inlet pressure up to 0.41 MPa (4.1 bar)
where expansion in mains supply is not possible
Figure 6 – For inlet pressure above 0.41 MPa (4.1 bar)
