Installation manual

19 ©ESP Ltd. Sept 2008

5. Commissioning 6. Maintenance

6.1 MAINTENANCE REQUIREMENTS (The Cylinder)

To ensure the continued optimum performance of the unit it should be regu-

larly maintained. This is of particular importance in hard water areas or

where the water supply contains particulate matter. Maintenance should be

carried out by a competent person and any replacement parts used should be

supplier recommended spare parts. It is recommended that maintenance is

carried out every 12 months on the cylinder and includes the checks detailed

in this manual.

In hard water areas consideration should be given to periodically de-scaling

the immersion heater elements. To do this the unit will need to be drained;

6.4 and 6.5 below detail how to drain the unit and remove the immersion

heater(s).

Please check the condition on the magnesium anode on any servicing/

maintenance and fit a new anode, if required.

6.2 CHECK OPERATION OF SAFETY VALVES

Slowly open the Temperature and Pressure Relief Valve by twisting its cap

for a few seconds. Check water is discharged and that it flows freely through

the tundish and discharge pipework. Check valve reseats correctly when re-

leased.

NOTE : The water discharged may be very hot.

Repeat the procedure for the Expansion Relief Valve (located on the Cold

Water Combination Valve or Expansion Valve Core Unit).

6.3 CLEAN THE STRAINER

The in line strainer must be cleaned periodically by a suitably qualified engi-

neer. The engineer should:

i) Wash any particulate matter from the inline strainer under clean running

water.

ii) Refit the inline strainer once totally clean or install a new one.

15) Give this manual along with the completed Log Book (if any) to the end

user to retain for future reference and make the customer aware that peri-

odic checks of the equipment are essential for safety.

PLEASE NOTE that

 you must have the unit fitted and commissioned by a suitably qualified engi-

neer ; and,

 installation instructions must be followed;

Failure to do so will invalidate any unit warranty/guarantee.

Hot water air source heat pump