Manual Elson Zircon (page 14 of 24) (English)

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FILLING THE UNIT WITH WATER

Ensure that all ttings and immersion heaters are

correctly tted and tightened. An immersion heater key

is provided to aid tightening the immersion heater(s)

• Check expansion vessel pre-charge pressure

The vessel is supplied precharged to 0.35MPa

(3.5 bar) to match the control pressure of

the pressure reducing valve. The precharge

pressure is checked using a car tyre gauge by

unscrewing the plastic cap opposite the water

connection.

• Check all connections for tightness including the

immersion heater(s). An immersion heater key

spanner is supplied for this purpose.

• Ensure the drain cock is CLOSED.

• Open a hot tap furthest from the cylinder.

• Open the mains stop cock to ll the unit. When

water ows from the tap, allow to run for a few

minutes to thoroughly ush through any residue,

dirt or swarf, then close the tap.

• Open successive hot taps to purge the system

of air.

SYSTEM CHECKS

• Check all water connections for leaks and rectify

as necessary.

• Turn off mains water supply.

• Remove the pressure reducing valve head work

to access the strainer mesh, clean and re-t.

• Manually open, for a few seconds, each relief

valve in turn, checking that water is discharged

and runs freely through the tundish and out at

the discharge point.

• Ensure that the valve(s) reseat satisfactorily.

DIRECT UNITS

Switch on electrical supply to the immersion

heater(s) and allow the cylinder to heat up to

normal working temperature (60°C recommended,

approximately graduation 4 on the thermostat).

If necessary the temperature can be adjusted by

inserting a at bladed screwdriver in the adjustment

knob on top of the immersion heater thermostat and

rotating. The adjustment range 1 to 5 represents

a temperature range of 12°C to 68°C. Check

the operation of thermostat(s) and that no water

has issued from the expansion relief valve or

temperature/pressure relief valve during the heating

cycle.

INDIRECT UNITS

Fill the indirect (primary) circuit following the boiler

manufacturer’s commissioning instructions. To ensure

the cylinder primary heat exchanger is lled, the 2

port motorised valve (supplied) should be manually

opened by moving the lever on the motor housing to

the MANUAL setting. When the primary circuit is full

return the lever to the AUTOMATIC position.

Switch on the boiler, ensure the programmer is

set to Domestic Hot Water and allow the cylinder

to heat up to a normal working temperature (60

recommended, approximately graduation 4 on the

thermostat). If necessary the temperature can be

adjusted by inserting a at bladed screwdriver in

the adjustment knob and rotating. The minimum

thermostat setting is 12°C.

The adjustment range 1 to 5 represents a

temperature range of 12°C to 68°C.

Check the operation of the indirect thermostat and

2 port motorised valve and that no water has issued

from the expansion relief valve or temperature/

pressure relief valve during the heating cycle.

BENCHMARK LOG BOOK

On completion of the installation and commissioning

procedures detailed in this manual the Benchmark

“Installation, Commissioning and Service Record Log,

pages 22 and 23 should be completed and signed off

by the competent installer or commissioning engineer

in the relevant sections. The various system features,

location of system controls, user instructions and

what to do in the event of a system failure should be

explained to the customer. The customer should then

countersign the Benchmark

commissioning checklist

(page 22) to accept completion. The Service Record

should be lled in when any subsequent service or

maintenance operation is carried out on the product.

COMMISSIONING

Hi. My cylinder is getting too hot. Boiler continues to run for hot water when programmer is off for heating and hot water. Diverter valve is working so what else could be causing this? Submitted on 14-1-2023 at 11:28
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Elson Zircon Manual

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