5
CLOCK - INSTRUCTIONS FOR USE
The boiler must be conected to the electrical sup-
ply and switched on.
Setting the time
Rotate the clock actuater mechanism clockwise,
by hand, until the current time is indicated by the
arrow, see diagram 2.
Note
: The time is set in 24 hour format, for example,
1300 for 1pm.
SERVICING/MAINTENANCE
To ensure the continued efficient and safe opera-
tion of the boiler, it is recommended that it is
checked and serviced at regular intervals.
The frequency of servicing will depend upon the
installation conditions and usage but, in general,
once a year should be enough.
Cleaning
The boiler casing can be cleaned with a damp
cloth followed by a dry cloth to polish.
Do not use abrasive or solvent cleaners.
Boiler casing
CAUTION
. Do not remove or adjust the casing in
any way, as incorrect fitting may result in faulty
operation. If in doubt, consult your installation/serv-
ice company.
Setting the programme "On" and "Off" times
l
Select the "On" times by pushing the white tap-
pets to the outside, see diagram 2.
l
Select the 'Off' times by pushing the white tap-
pets to the inside, see diagram 2.
The clock shown in diagram 2 is set as follows:
ON
➜
07.00am to 09.00am
(7-9)
OFF
➜
09.00am to 4.00pm
(9-16)
ON
➜
4.00pm to 10.00pm
(16-22)
OFF
➜
10.00pm to 07.00am
(22-7)
Reg 049
Diagram 2
Diagram 3
To override or advance the
clock
The clock has a manual On/
Off switch, see diagram 3,
which operates as follows :
Upper position
Heating On/Off as set by the
tappets.
Middle position
Heating Off continuously
Lower position
Heating On continuously
Reg 050
DRAINING
Protection against freezing
If the boiler is to be out of use for any long periods
during severe weather conditions, it is recom-
mended that the whole system, including the boiler,
be drained to avoid the risk of freezing.
If in doubt, consult your servicing company.
The
ISOFAST
has a built in frost protection device
that protects the boiler from freezing. If the boiler is
to be left and there is a risk of frost, ensure that the
gas and electrical supplies are left connected. The
frost protection device will light the boiler when the
temperature of the boiler water falls below 6
°
C.
When the temperature reaches 16
°
C, the boiler
stops.
Note:
This device works irrespective of any room
thermostat setting and will protect the complete
heating system.
Draining and filling
Caution: The boiler is installed as part of a sealed
system which must only be drained and filled by a
competent person.
Heating safety valve
CAUTION:
A heating safety valve with a discharge
pipe is fitted to this boiler.
The valve MUST NOT BE TOUCHED except by a com-
petent person. If the valve discharges at any time,
switch the boiler off and isolate it from the electri-
cal supply. Contact your installation/service com-
pany.
Pressure relief valve
CAUTION:
A domestic hot water pressure relief
valve, with a discharge pipe is fitted to this boiler.
The valve MUST NOT BE TOUCHED except by a com-
petent person. If the valve discharges at any time,
switch the boiler off and isolate it from the electri-
cal supply. Contact your installation/service com-
pany.
Summary of Contents for ISOFAST F 28 E
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