32
Response 80 / 100 / 120
- Installation
45
GENERAL CHECKS
1. Hand the User's Instructions to the householder and
explain his or her responsibilities under
current Gas
Safety (Installation and Use) Regulations, or rules in
force.
2. Draw attention to the Lighting Instruction label affixed to
the inside of the lower front door.
3. Explain and demonstrate the lighting and shutting down
procedures.
4. The operation of the boiler and the use and adjustment of
ALL system controls should be fully explained to the
householder, to ensure the greatest possible fuel
economy consistent with household requirements of both
heating and hot water consumption.
5. Advise the user of the precautions necessary to prevent
damage to the system and to the building, in the event of
the system remaining inoperative during frosty conditions.
After completing the installation and commissioning
of the system, the installer should hand over to the
householder by the following actions:
46
HANDING OVER
INSTALLATION
INST
ALLA
TION
Response 80
43.1 to 47.7
litres per minute
1.52 to 1.68
cu/ft per minute
Response 100
51.9 to 57.4
litres per minute
1.8 to 2.0
cu/ft per minute
Response 120
64.8 to 71.6
litres per minute
2.28 to 2.52
cu/ft per minute
checked at the gas meter, with no other appliance in use.
These figures apply at the nominal UK mains voltage of
230V.
Note.
Long flue will reduce air flow, reducing the gas rate,
slightly. If these rates are not obtainable consult the fault
finding section.
4. Water circulation system
Note.
Fernox Superfloc flushing solution should be used
during the flushing procedure.
a.
With the system HOT examine all water connections
for soundness.
b.
With the system still HOT, turn off the gas, water and
electricity supplies to the boiler and drain down, to
complete the flushing process.
c.
Refill the system, adding inhibitor (see 'Water
Treatment'), if required.
Vent as necessary to clear all air and, again, check for
water soundness. After venting, repressurise as
required.
d.
Balance the system.
It is suggested that, initially, all
radiator handwheel valves (or TRVs if fitted) be
set fully open, that all lockshield valves be set a
half-turn open and the bypass a half-turn to one
turn open (a minimum of one turn open is
recommended when TRVs are used.)
Make minor adjustments to each radiator to achieve
the same differential on all.
Lastly, set the bypass to eliminate any boiler noise,
without compromising radiator temperatures.
5. Finally, set the system controls to the user’s requirements.
6. Remove the labels from the casing front panel.
If an optional programmer kit is fitted refer to the
instructions supplied with the kit.
6. If a programmer kit is fitted, draw attention to the
Programmer Kit User's Instructions and hand them to the
householder.
7. After installation, commissioning and customer hand-over
instructions please complete the
appliance log
book and leave this with the customer.
8. Stress the importance of regular servicing by a CORGI
registered installer and that a comprehensive service
should be carried out AT LEAST ONCE A YEAR.
9. Demonstrate how to repressurise the boiler when the
system pressure falls below 0.5 bar.
10.
Emphasise to the user that the boiler may stop
working if the system pressure is lowered by draining
radiators to decorate behind them. In particular, explain
to the user how the domestic hot water temperature
varies with flow rate. This is especially important when
water is drawn off while the boiler is already running for
central heating (refer to 'CAUTION' in User's
Instructions, page 2).
Make the following checks for correct operation:
1. Hot water
a.
Fully open all DHW taps in turn and ensure that water
flows freely from them.
b.
Close all taps except the furthest one from the boiler
and check that the boiler is firing at maximum rate.
c.
Check DHW flow rate and ADJUST to requirements
with boiler cold.
To obtain best overall summer and winter water
temperature and flow Caradon recommend setting at
a temperature rise = 40
o
C . See Table below.
d.
Turn off the DHW tap.
Model
Flow rate litres/min.
Time to fill a standard
35
o
C Temp rise
40
o
C Temp rise
2 gallon bucket
80
9.6
8.4
65 secs
100
12.0
10.5
52 secs
120
14.2
12.6
43 secs
2. Central heating
Operate each control separately and check that the main
burner or circulating pump, as the case may be,
responds.
3. Gas rate
Check the boiler gas rate when the boiler is at full DHW
output.
The gas rate will normally be between:
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