11
6.0 COMMISSIONING
6.1 FILLING THE UNIT WITH WATER
•
Check Expansion Vessel pre-charge pressure. The
vessel is supplied pre-charged to 3.5 bar to match the
control pressure of the Pressure Reducing Valve. The
pre-charge pressure is checked using a car tyre gauge
by unscrewing the plastic cap opposite the water con-
nection.
•
Check all connections for tightness including the
immersion heater(s). An immersion heater key span-
ner is supplied for this purpose.
•
Ensure the drain cock is
CLOSED.
•
Open a hot tap furthest from the Heatstore HSU.
•
Open the mains stop cock to fill the unit. When
water flows from the tap, allow to run for a few min-
utes to thoroughly flush through any residue, dirt or
swarf, then close the tap.
•
Open successive hot taps to purge the system of
air.
6.2 SYSTEM CHECKS
•
Check all water connections for leaks and rectify
as necessary.
•
Remove the Pressure Reducing Valve Cartridge
to access the strainer mesh (see Section 7.3 for de-
tails), clean and re-fit.
•
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.
6.3 DIRECT UNITS
Switch on electrical supply to the immersion heater(s)
and allow the Heatstore HSU to heat up to normal
working temperature (60ºC recommended, approxi-
mately graduation 4 on the thermostat). If necessary
the temperature can be adjusted by inserting a flat
bladed screwdriver in the adjustment knob on top of
the immersion heater thermostat and rotating. The ad-
justment range 1 to 5 represents a temperature range
of 10
o
to 70
o
C. Check the operation of thermostat(s)
and that no water has issued from the Expansion Re-
lief Valve or Temperature/Pressure Relief Valve during
the heating cycle.
6.4 INDIRECT UNITS
Fill the indirect (primary) circuit following the boiler
manufacturer’s commissioning instructions. To ensure
the Heatstore HSU primary heat exchanger is filled,
the 2 port motorised valve (supplied) should be manu-
ally opened by moving the lever on the motor hous-
ing to the FLUSHING ONLY setting. When the pri-
mary circuit is full return the lever to the NORMAL
USE position. Switch on the boiler, ensure the pro-
grammer is set to Domestic Hot Water and allow the
Heatstore HSU to heat up to a normal working tem-
FIG. 9 Indirect thermostat and thermal cut-
out
perature (60
o
C recommended, approximately gradua-
tion 4 on the thermostat). If necessary the tempera-
ture can be adjusted by inserting a flat bladed screw-
driver in the adjustment knob (located on top of the
thermostat mounting bracket - see Fig.9) and rotating.
The minimum thermostat setting is 10
o
C. The adjust-
ment range 1 to 5 represents a temperature range of
30
o
to 70
o
C. Check the operation of the indirect ther-
mostat and 2 port motorised valve and that no water
has issued from the Expansion Relief Valve or Tem-
perature/Pressure Relief Valve during the heating cycle.
6.5 BENCHMARK
TM
LOG BOOK
On completion of the installation and commissioning
of the Heatstore HSU the Benchmark
TM
“Installation,
Commissioning and Service Record Log Book” should
be completed and signed off by the competent in-
staller or commissioning engineer in the relevant sec-
tions.
The various system features, location of system con-
trols, 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
TM
log book to accept completion.
The log book should be left with the customer along
with these instructions. The log book includes sec-
tions that should be filled out when any subsequent
service or maintenance operation is carried out on the
Heatstore HSU system.
CABLE CLAMPS
TERMINAL BLOCK
INDIRECT
THERMOSTAT
THERMOSTAT
ADJUSTMENT
INDIRECT
THERMAL
CUT-OUT
INDIRECT THERMAL
CUT-OUT RESET
BUTTON
NOTE:
THE HOUSING COVER AND ELEMENT ASSEMBLY
HAVE BEEN REMOVED FROM THIS VIEW FOR
CLARITY
