Installation manual

9 ©ESP Ltd. Sept 2008

4.1 INSTALLATION DIAGRAM

Please note: Circulation of the hot water, solar and heat reclaims is optional.

Please contact Earth Save Products before using the primary coil.

ATTENTION

The one-way safety valve attached with the unit must be installed or it will

cause damage to the unit and can cause injury in certain circumstances.

Ensure that any damage to the unit caused prior to delivery is notified to the

Supplier within 5 days of delivery. Failure to notify the Supplier within this

time period will mean that any claims relating to damage will be rejected.

4.2 PIPE FITTINGS

All pipe connections to the unit are 22mm. The fittings are also threaded

3/4” BSP male should threaded pipe connections be required.

Air ducts must be at least in 6 inch rigid pipe.

4.3 COLD WATER SUPPLY

A 22mm cold water supply is recommended, however, if a 15mm (1/2”) sup-

ply exists which provides sufficient flow (see section 2.3) this may be used.

More flow noise may be experienced from small bore pipes due to the in-

creased water velocity through them.

The Cold Water Combination Valve supplied with the unit incorporates a

full flow isolating valve which will enable the unit to be isolated from the

mains supply for maintenance or servicing. To close the valve the black han-

dle should be turned so that it lies at 90°C to the direction of flow. To open

turn the handle so that it lies parallel to the direction of flow.

An inline filter and an effective scale prevention device must be fitted to the

cold feed.

4.4 COLD WATER COMBINATION VALVE (see Figure 2)

The Cold Water Combination Valve must be sited close to the unit to allow

the safety discharge pipe to run in to the tundish, in line with appropriate

Regulations. The Expansion Valve connection must not be used for any

other purpose.

The Cold Water Combination Valve can be installed as a complete one-piece

unit. The valve incorporates a factory set, non-adjustable Pressure Reducer/

Strainer, an Expansion Valve connection and a single Check Valve. The

valve can be fitted in any orientation to suit the installation, however, ensure

that the Valve is installed with the direction of flow arrows (stamped on the

side of the brass body) pointing towards the unit.

4. Installation 4. Installation

Hot water air source heat pump