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Once the process of commissioning the boiler is
complete, the commissioning engineer MUST com-
plete his section in the Benchmark log book.
6.13
CHECKING THE FLUE SYSTEM
6.13.1
The flue system should be visually checked
for soundness. Check all fixings are secure
and tight.
6.14
CHECKING THE HEATING THERMOSTAT
6.14.1
Allow the system to warm up and then turn
the C.H. thermostat to ensure the main
burner modulates from “high” to “low” and
“low” to “off” and vice versa (scale range
covers approx. 45” C 85” C).
6.15
TESTING AND REGULATINGTHE
DOMESTIC HOT WATER SYSTEM FLOW
6.15.1
To put the appliance in operation with the
(summer/winter) switch in winter position.
- Open a domestic hot water tap (prefer-
ably the bath tap). Ensure cold water
inlet stopcock is open and the D.H.W.
thermostat 5 (Fig. 50) is set at maxi-
mum.
- If the burner does not light check that
the water flow rate is above the min.
required to operate the differential pres-
sure 2.8 Lts./min. (0.61 gals/min).
- The temperature of the water will
depend on the rate at which it flows. If,
due to high water pressure, the flow rate
IS
too high (and thus the temperature
too low for practical use) the flow rate
may be adjusted. It is better to set for
the lowest acceptable temperature
preferably at the bath tap since the user
can gain higher temperatures at other
restricted flow taps (Table 112).
- N.B.: If the cold supply is subject to
large fluctuations or is above the permit-
ted max. water pressure, a suitable
pressure/flow regulator should be fitted
in the cold water supply to the appli-
ance.
- Turn the appliance mode selector switch
1 (Fig. 50) to the summer position .
Slowly close the draw off tap to reduce
the flow rate to above the min. (approx.
2.8 litre/min - 0.61 gals/min.). Rotate
the D.H.W. control thermostat to ensure
it operates at its various setting.
- Close the draw-off tap still further. The
burner should stop when the rate falls
b e l o w a b o u t 2 . 8 l i t r e s / m i n ( 0 . 6 1
gals/min.).
6.16
HANDING OVER TO THE USER
6.16.1
After completion of installation and com-
missioning of the system, the installer
should hand over to the Householder by
taking the following actions:
- Hand the “User’s Instructions” to the
Householder and explain His/Her
responsibilities under the “Gas Safety
Regulations 1996”.
- Explain and demonstrate the lighting
and shutting down procedures.
- The operation of the boiler including the
use and adjustment of ALL system con-
trols which should be fully explained to
the Householder. This then ensures the
greatest possible fuel economy consis-
tent with household requirements of
both heating and hot water consump-
tions. Advise the User of the precau-
tions necessary to prevent damage to
the system, and to the building, in the
event of the system remaining Inopera-
tive during frost conditions.
- Explain the function and the use of the
boiler (Summer/Winter)
and ON/OFF switch.
- Explain and demonstrate the function of
time and temperature controls neon
lights radiator valves etc. for the eco-
nomic use of the system.
- If an optional time clock is fitted, then
draw attention to the time clock User’s
Instructions and hand them to the
Householder.
- Stress importance of regular servicing
by a qualified Heating Engineer and that
a comprehensive service should be car-
ried out AT LEAST ONCE A YEAR.
Fill in the Benchmark log book and leave
completed with the customer.
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