32
Henrad CC FF
- Installation
45 GENERAL CHECKS
1. Hand the User's Instructions to the householder and explain
his or her responsibilities under
c
urrent 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
CC 80 FF
43.1 to 47.7
litres per minute
1.52 to 1.68
cu/ft per minute
CC 100 FF
51.9 to 57.4
litres per minute
1.8 to 2.0
cu/ft per minute
CC 120 FF
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.
6. If a timer kit is fitted, draw attention to the Timer 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).
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:
If an optional timer kit is fitted refer to the instructions supplied with the kit.
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
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.
