Supplied By www.heating spares.co Tel. 0161 620 6677
15
5.9.1
SETTING THE DOMESTIC HOT WATER TEM-
PERATURE
The DHW outlet temperature can be adjusted
between 40 ºC - 65 ºC via the Hot Water thermo-
stat knob (see fig.1).
5.10
SETTING THE SYSTEM DESIGN PRESSURE
The design pressure should be a minimum of 1
BAR and a maximum of 1.5 BAR.
The actual reading should ideally be 1BAR plus
the equivalent height in metres (0.1 BAR = 1
metre) to the highest point in the system above
the base of the appliance (up to the maximum of
1.5 BAR total).
N.B. The safety valve is set to lift at 3 BAR/30
metres/45 psig.).
To lower the system pressure to the required
value, water can be drained from the heating
system drain cock or from the boiler drain cock.
5.11
REGULATING THE HOT WATER
The appliance is fitted with a flow rate restrictor
that limits the maximum flow rate that can be
drawn through the appliance.
The restrictor eliminates the need to manually
adjust the DHW flow rate. However if it is felt
necessary to further increase or decrease the
available flow rate, spare restrictors are included
in the accessory pack.
The spare flow rate restrictors can be fitted to
either increase or decrease the maximum flow
rate. The tables above denote the size of restrictor
fitted and the spare restrictors supplied in the
accessory pack. Each restrictor is colour-coded
to enable identification.
5.11.1 CHANGING THE FLOW RESTRICTOR
Refer to 6.19 for detailed instruction on changing
the flow restrictor.
5.11.2 REGULATING THE CENTRAL HEATING SYS-
TEM
Fully open all radiator and circuit valves and run
the appliance for both heating and hot water until
heated water is circulating. If conditions are warm
remove any thermostatic heads. Adjust radiator
return valves and any branch circuit return valves
until the individual return temperatures are cor-
rect and are approximately equal.
5.12
FINAL CHECKS
●
ENSURE ALL TEST NIPPLES ON THE APPLI-
ANCE GAS VALVE HAVE BEN TIGHTENED
AND CHECKED FOR SOUNDNESS.
●
ENSURE THE APPLIANCE FLUE SYSTEM
IS FITTED CORRECTLY AND IS PROPERLY
SECURED.
●
ENSURE ALL PIPE WORK IS RE-CHECKED
FOR SOUNDNESS.
●
RE-FIT APPLIANCE CASING.
●
COMPLETE BENCHMARK CHECKLIST.
Complete details of the boiler, controls, installa-
tion and commissioning in the Benchmark check-
list at the back of this book. It is important that
the Benchmark checklist is correctly completed
and handed to the user. Failure to install and
commission the appliance to the manufacturers
instructions may invalidate the warranty.
5.13
INSTRUCTING THE USER
Hand over all documentation supplied with this
appliance - including these instructions - and
explain the importance of keeping them in a safe
place.
Explain to the user how to isolate the appliance
from the gas, water and electricity supplies, and
the locations of all drain points.
Show the user how to operate the appliance and
any associated controls correctly.
Show the user the location of the filling valve and
how to top-up the system pressure correctly, and
show the location of all manual air release points.
Explain to the user how to turn off the appliance for
both long and short periods and advise on the
necessary precautions to prevent frost damage.
Explain to the user that for continued safe and
efficient operation, the appliance must be serv-
iced annually by a competent person.
5.14
TECHNICAL ASSISTANCE
Should you require technical advice or assistance
on this product, please contact ‘Heating Services’
on 0870 264 1220 or Heating Services, PO BOX
167, BRADFORD, BD19 4WL.
9-litre (Orange)
10-litre (Blue)
11-litre (Beige)
Spare
Fitted
Spare
100 HE
8-litre (White)
9-litre (Orange)
10-litre (Blue)
Fitted
Spare
Spare
85 HE
