The Maxol Supacombi HE 28 is a high efficiency condensing, fully
automatic, wall mounted, fan-assisted, balanced flue gas combination
appliance suitable for room sealed applications, for use with natural gas.
This combination appliance provides the user with both central heating
(CH) and domestic hot water (DHW) on demand.
The Supacombi HE 28 provides central heating and domestic hot
water at outputs between 12.1 kW (41,300BTU/h) and 28.3 kW
(96,600 BTU/h).
Heat output is controlled according to demand (in both domestic hot
water and central heating modes) by the fully modulating pre-mix burner
control. The appliance always gives priority to domestic hot water supply.
The appliance incorporates frost protection. The main electrical supply to
the appliance must, however, not be isolated for this to be operational.
An electro/mechanical 24hr time clock is fitted as standard.
Gas Consumer Council
The Gas Consumer Council (GCC) is an independent organization which
protects the interests of gas users. If you need advice, you will find the
telephone number in your local directory under 'Gas'.
2
SAFETY
Read these instructions and the user label (fitted on the boiler front panel)
carefully before attempting to operate the appliance. Comply with all
applicable warnings.
Do not interfere with any sealed
components and use the appliance only in accordance with
these instructions.
CURRENT GAS SAFETY (INSTALLATION AND
USE) REGULATIONS OR THE RULES IN FORCE.
It is the law that all gas appliances are installed by a competent person in
accordance with the above regulations. Failure to install appliances
correctly could lead to prosecution. It is in your own interest, and that of
safety, to ensure that the law is complied with.
If the appliance is damaged, turn off the appliance and consult a CORGI
registered installer.
If it is known or suspected that a fault exists on the appliance it MUST
NOT be used until the fault has been rectified by a competent person.
2.2
ELECTRICAL SUPPLY
This appliance must be earthed.
Supply: 230V ~ 50Hz fused at 3A.
The method of connection to the mains supply must facilitate complete
isolation of the appliance. Either a 3A fused three pin plug and
unswitched shuttered socket outlet, or a 3A fused double pole switch
having a 3 mm contact separation in both poles, serving only the boiler
(and its external controls), may be used.
2.3
CLEARANCES AND VENTILATION
It is not necessary to have a purpose provided air vent in the room or
internal space in which a room-sealed appliance is installed. Cupboard
or compartment ventilation is not necessary for a room-sealed appliance
providing that the minimum clearances are maintained.
1
INTRODUCTION
3
BOILER LOGBOOK
Please ensure that the Benchmark Logbook supplied with the installation
instructions of your appliance is completed by your installer to verify that
the correct installation and commissioning procedure was followed.
Failure to complete the Logbook may result in difficulties should a
problem arise with your appliance during the guarantee period.
This Logbook forms part of the industry's Benchmark code of practice for
the installation, commissioning and servicing of central heating systems.
All CORGI Registered Installers carry a CORGI ID card and have a
registration number. Both should be recorded in your Logbook.
You can check your installer is CORGI registered by calling CORGI on
0870 401 2230.
On a demand for DHW, water flow is detected and the ignition
sequence initiated. The fan and pump will start and the boiler will light.
If the DHW draw off rate is high (over 10l/min.), the appliance will run
continuously at full output until the tap is either turned off, or the flow rate
is reduced, in which case the heat supplied will reduce accordingly to
maintain a steady temperature (60°C max).
Hot water is made available at the appliance outlet almost immediately,
but the final temperature and time taken for the hot water to reach a tap
depends upon the rate at which water is drawn off and the length of the
pipe runs between the boiler and taps.
When the tap is turned off, the appliance after a short period of time will
revert to central heating mode if there is a demand. Otherwise the
burner will be extinguished until the next demand for hot water.
Priority is always given to Domestic Hot Water supply.
2.1
4
HOT WATER OPERATION
Switch on the electrical supply.
1) To adjust the timer to the current time of day, simply rotate the outside
edge of the clock, clockwise to line up with the current time on the 24
hr clock dial.
2) To set the CH to come on at a specific time, slide out the small tabs
around the outside edge of the timer, for the duration you would like
the CH to be active. For instance – To activate the central heating
between 6am and 9am, slide out all the tabs between the 6 and 9.
To activate the central heating between 5pm and 10pm, slide out all
the tabs between the 17 and 22. The boiler can be set to switch on
and off at intervals of 15 minutes, as many times as required per day.
3) Set the clock override switch to the TIMED position (middle setting)
which is marked as . The CH will now be active during the time
periods set.
4) If the clock override switch is set to
I
the timer will activate the CH
continuously, and if it is set to
0
, the timer will turn the CH off.
5) The mechanical timer has no effect on the supply of DHW.
SETTING THE CLOCK AND TIMER
5.1
5
OPERATING INSTRUCTIONS
Refer to Fig. 1
Note: After a hot water draw off the burner may
stay on for a few seconds (see clause 5.8 'Keep
hot facility' in the installation manual)
