Description Of The Product; General Description; Operation Principle; Standard Delivery - Heatrae Sadia Multipoint 10 and 15 litre Fitting Instructions Manual

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.
6
Temperature
and pressure
relief valve
Hot Cold
Tundish
Multipoint To drain (waste)
10 litre
or 15 litre
2.8 (10 l) or 4.2 (15 l)
heater
metres is required for
expansion in pipework
Figure 4 – For inlet pressure up to 0.41 MPa (4.1 bar)
Temperature Pressure
and pressure relief
relief valve (expansion)
valve
Hot Cold
Tundish
Multipoint
To drain (waste)
10 litre
or 15 litre
heater
Figure 5 – For inlet pressure up to 0.41 MPa (4.1 bar)
where expansion in mains supply is not possible
Pressure
Temperature
relief
and pressure
(expansion)
relief valve
valve
Hot Cold
Tundish
Multipoint
To drain (waste)
10 litre
or 15 litre
heater
Figure 6 – For inlet pressure above 0.41 MPa (4.1 bar)

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.
Nearest cold
Service valve
draw off
(fixed jumper or
Check
1/4 turn ball type)
Valve
Expansion Nearest cold
vessel draw off
Check
Valve
Nearest cold
Expansion
draw off
vessel
Pressure
Check
relief
Valve
(expansion)
valve
Note: If pressure reducing valve is
used expansion down the mains is not possible
Cold
water
mains
Service valve
Cold
water
mains
Service valve
Cold
water
mains