Note: The boiler serial number is marked on the data label attached to the PCB housing behind the front
lower section. Refer to the ‘Introduction’ section for a description of the basic functions of the boiler. The
‘User’ section describes how to safely operate the boiler.
WARNING, these appliances were designed, approved and inspected to meet the requirements of the
English market. The identification plate located on the inside of the appliance certifies the origin where the
product was manufactured and the country for which it is intended.
If you see any exception to this rule, please contact your nearest stockist.
Thank you in advance for your assistance.
Heating and hot water system design ....................7
The Combitek F 23 E is a wall mounted combination
boiler providing central heating and instantaneous
domestic hot water.
These instructions should be carefully followed for
the safe and economical use of your boiler.
Gas leak or fault
If a gas leak or fault exists or is suspected, turn the
boiler and gas supply off and consult the local gas
company or your Installer/Service provider.
In case of power supply failure
The boiler no longer operates.
As soon as power supply is restored, the boiler will
restart automatically.
In case of loss of water in the system
CAUTION. The boiler is installed as part of a sealed
system which must only be drained and filled by a
competent person.
If the pressure shown on the pressure gauge is less
than 1.5 bar the system must be filled up.
Important notice: A central heating system cannot
operate satisfactorily unless it is properly filled with
water and unless the air initially contained in the
piping systems has been properly bled off. If these
conditions are not satisfied, air noise will occur within
the system and the boiler may fail to operate.
Air in the heating system
Persistent air in the heating system may indicate
leaks in the system or corrosion taking place. Call
your Installer/Service provider.
Overheating safety
In the event of problem, the overheat safety device
causes safety shutdown of the boiler. If this happens,
call your Installer/Service provider.
2
USER INSTRUCTIONS
The control panel is located on the front
bottom section. The controls on this panel
allow the boiler to be started, shut down
and controlled during use.
1- Pressure / Temperature gauge
2- Hot water / Heating temperature
control & summer / winter switch
3- Timeclock
4- Mains On/Off switch
Diagram 1
CONTROLS AND LIGHTING
Make sure that:
The boiler is connected to the electrical supply.
The boiler gas service cock is open.
The pressure gauge reads between 1.5 and 2 bar.
The boiler is now ready to start.
To start the boiler
Switch on using mains switch (4), see diagram 1.
Place switch (2) in the Summer or Winter position
To stop the boiler
Place switch (4) to the Off position (0).
Setting to ‘Summer’
mode (Hot water only)
Place switch (2) in the
Summer position (see
1
2
diagram 2).
Setting to ‘Winter’ mode
(Heating and hot water)
Place switch (2) to the
Winter position
Diagram 2
Adjust the heating temperature control (2) to the
desired temperature.
The heating will operate according to the
requirements of the timeclock and/or room thermostat if fitted or, will operate according to the
system requirements.
Domestic hot water always has priority over central heating.
Timeclock
To set the clock rotate actuater mechanism
clockwise, by hand, until current time is indicated.
See diagram 3.
Note: The time is set in 24 hour format, for example
1300pm for 1pm
Setting the programme ‘ on & off ’ times
Select the on times by pushing the black tappets to
the outside
Select the off times by pushing the black tappets to
the inside
The clock shown in diagram 3 is set as follows
On07.00am to 09.00am
Off09.00am to 4.00pm
On4.00pm to 10.00pm
Off10.00pm to 07.00am
5
6
7
8
9
3
4
5
1
24
2
23
3
2
2
12
4
2
1
2
0
I
1
9
9
16
0
0
1
6
1
5
1
1
1
4
2
1
1
3
3
1
8
1
7
21
1
2
3
4
5
1
2
3
4
5
6
7
9
8
9
10
11
24
23
12
6
12
13
22
0
1
5
14
4
21
20
I
19
18
17
16
Diagram 3
To override or advance the clock
The clock has a manual on/off switch see diagram
3 which opperates as follows:
Upper position 1Heating on continuosley
Middle positionHeating on timed
Lower position 0Heating off
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.
Note: If there is persistent loss of system pressure, you
must consult your Installer/Service Provider.
HEATING SAFETY VALVE
CAUTION: A safety valve with a discharge pipe is
fitted to this boiler.
The valve MUST NOT BE TOUCHED except by a
competent person. If the valve discharges at any
time, switch the boiler off and isolate it from the
electrical supply. Contact your Installer/Service
Provider.
SERVICING/MAINTENANCE
To ensure the continued efficient and safe operation
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.
3
USER INSTRUCTIONS
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.
INSTALLATION INSTRUCTIONS
INTRODUCTION
The Combitek F 23 E is a wall mounted combination
boiler providing central heating and instantaneous
domestic hot water.
Note: this boiler requires no fixing jig and has top
outlet flueing only ( there is no rear flue option ).
The boiler is of the II2H3+ category for use with
Natural gas (G20). To convert to Butane (G30) or
propane (G31), the following kit is required.
Gas conversion kit :part number 86161
The boiler has a fan assisted, balanced, flue which
both discharges the product of combustion to, and
draws the combustion air from, the outside of the
building.
BOILER CASING
CAUTION: Do not remove or adjust the casing in any
way, as incorrect fitting may result in faulty operation.
If in doubt, contact your Installer/Service Provider.
Accessories
A range of accessories are available including,
vertical flue components. For further information,
contact you nearest stockist.
Gas Safety (Installation and Use) Regulations
In the interests of gas safety, it is the law that ALL gas
appliances are installed and serviced in by a
competent person in accordance with the above
regulations.
Gas leak or fault
If a gas leak or fault exists or is suspected, turn off the
boiler and gas supply and consult the local gas
company or your Installer/Service Provider.
TECHNICAL DATA
Heating output
automatically variable from8,9 kW to 23,3 kW
30,000 BTU/H to 80,000 BTU/H
Efficiency82,4 %
Heating adjustment38°C to 90°C
Expansion vessel effective capacity6,5 l
Expansion vessel charge pressure0,5 bar
Maximum system capacity at 75°C140 l
Safety valve, maximum service pressure3 bar
Products outlet diameter60 mm
Fresh air inlet diameter100 mm
Natural GasButanePropaneTown gas
(G20)(G30)(G31)(G130)
Burner injector1,2 mm0,73 mm0,73 mm2,4 mm
Inlet pressure20 mbar29 mbar37 mbar8 mbar
Gas rate (maximum)2,70 m3/h2,01 kg/h1,98 kg/h3,88 m3/h
Gas rate (minimum)1,13 m3/h0,84 kg/h0,74 kg/h1,63 m3/h
G 20(mbar) 1,32,12,63,03,54,04,55,15,76,36,97,68,38,89,8
G 30(mbar) 3,75,36,37,48,69,811,112,513,915,417,018,620,421,724,1
G 31(mbar) 4,06,37,58,810,211,713,314,916,718,520,322,224,426,028,8
Hot water output
automatically variable from8,9 kW to 23,3 kW
30,000 BTU/H to 80,000 BTU/H
Maximum hot water temperature65 °C
Specific flow rate (for 35°C temp rise)9,6 l/min
Threshold flow rate3 l/min
Nominal water flow rate12 l/min
Maximum supply pressure10 bar
Minimum operating pressure0,5 bar
Electrical supply230 V
Maximum absorbed power130 W
Heat output
Heat input
4
INSTALLATION INSTRUCTIONS
Pump:
The performance of the pump varies according to the pump bypass setting, see diagram 3.
50
Bypass fully shut
1
40
30
20
10
heating flow and return
0
Available pressure (kPa) between
(10 kPa = 1 m WG)
Diagram 3
DIMENSIONS
The boiler is delivered in two
separate packages:
- The boiler
- The flue system
1
2
3
4
5
5001000
Flow rate through heating system (I/h)
Pom 052
Open 1/4 turn
2
Open 1/2 turn
3
Open 1 turn
4
Open 2 turns
5
Clearances
The boiler can be installed with
the following clearances:
50 mm either side of the boiler
600 mm to the front of the boiler
300 mm below the boiler
9-Pump
10 - Automatic air vent
11 - Burner
12 - Burner pressure test point
13 - Heat exchanger
14 - Gas valve
16 - Heating and hot water thermistor
17 - Ignition electrode
23
19 - Overheat thermostat
20 - Flame sense electrode
21 - Loss of water pressure switch
22 - Fan
23 - Air pressure switch
24 - Gas cock
A - Heating return
B - Cold water inlet
C - Heating flow
D - Domestic hot water flow
E - Gas supply
22
13
20
12
11
10
9
8
7
6
21
19
17
16
14
3
4
24
Diagram 5
6
AB CD E
Shy 131b
INSTALLATION INSTRUCTIONS
Minimum dimensions (in mm) for the positioning of flue terminals
A-Under a window .............................................. 300
B-Under an air vent ............................................ 300
C-Under a gutter ................................................. 75
D-Under a balcony ............................................. 300
E-From an adjacent window ............................ 300
F-From an adjacent air vent ............................. 300
G-From vertical drain pipes or soil pipes .......... 75
H-From an external corner of the building ...... 300
I-From an internal corner of the building ....... 300
L-From the ground or from another floor ........ 300
M- Between two terminals vertically .................. 1500
N-Between two terminals horizontally .............. 300
Diagram 6
G
C
N
E
F
M
A
B
D
I
L
H
Ven 060b
TERMINAL POSITIONS
The minimum acceptable spacings from the terminal to obstructions and ventilation openings are
shown in diagram 6 :
Cupboard or compartment ventilation
The boiler can be fitted in a cupboard or
compartment without the need for additional permanent high and low level ventilation
HEATING SYSTEM DESIGN
The combitek F 23 E is compatible with any type of
sealed system installation, i.e. radiators, fan
convectors etc.
Pipe sectional areas shall be determined in
accordance with normal practices, using the pump
curve, refer to ‘Technical Data’. The distribution system
shall be calculated in accordance with the output
requirements of the actual system, not the maximum output of the boiler. However, provision shall be
made to ensure sufficient flow so that the temperature
difference between the flow and return pipes is less
than or equal to 20
o
C. The minimum flow is 500 l/h.
The piping system shall be routed so as to avoid any
air pockets and facilitate permanent venting of the
installation. Bleed fittings shall be provided at every
high point of the system and on all radiators.
The total volume of water permitted for the heating
system depends, amongst other things, on the static
head in the cold condition. The expansion vessel on
the boiler is pressurised at 0,5 bar (corresponding to
a static head of 5m wg.) and allows a maximum
system volume of 140 litres for an average
temperature of 75oC and a maximum service pressure of 3 bar. This pressure setting can be modified at
commissioning stage if the static head differs.
Provision shall be made for a drain valve at the
lowest point of the system.
DOMESTIC HOT WATER SYSTEM DESIGN
Copper tubing must be used for the domestic hot
water system. Unnecessary pressure losses should be
avoided.
The domestic hot water supply pressure must be
between 0.5 and 10 bar. If the pressure exceeds 3
bar, a pressure reducing valve must be fitted.
Hard water areas
In areas where the water hardness exceeds 200 mg/
litre, it is recommended that a suitable scale reducing
device is fitted.
Heating system connections - Pipe Ø 22 mm.
Hot water system connections - Pipe Ø 15 mm.
Gas connection - Pipe Ø 22mm.
Safety valve discharge
WARNING: It must not discharge above an entrance
or window or any type of public access area.
Connect the safety valve discharge pipe to the
valve, the discharge must be extended using not
less than 15 mm o.d. pipe, to discharge in a visible
position outside the building, facing downward,
preferably over a drain. The pipe must have a
continuous fall and be routed to a position so that
any discharge of water, possibly boiling or steam,
cannot create any danger to persons, damage to
property or external electrical components and
wiring. Tighten all pipe connection joints.
Gas connection
The supply from the governed meter must be of
adequate size to provide a constant inlet working
pressure of 20 mbar (8 in wg).
To avoid low pressure problems, it is recommended
that the supply is taken to the boiler using 22 mm
pipe as far as possible.
On completion, the gas installation must be tested
using the pressure drop method and purged in
accordance with the current issue of BS6891.
Thermostatic radiator valves are permitted.
A suitable WRC approved filling loop must be fitted
to enable correct filling of the system.
In all cases, it is ESSENTIAL that the system be
thoroughly flushed prior to installing the new boiler.
Gas Safety (Installation and Use) Regulations.
In your interests and that of gas safety, it is the law
that ALL gas appliances are installed and serviced
by a competent person in accordance with the
above regulations.
7
INSTALLATION INSTRUCTIONS
Boiler connections
AHeating return
BCold water mains inlet
CHeating flow
DHot water outlet
EGas connection
FSafety valve discharge connection
A
B
Flow restrictor
Filter
Diagram 7b
C
F
Fibre
washer
D
Isolating cock
B
Pla 277
Pla 275
E
Diagram 7a
Statutory requirements
The installation of this boiler must be carried out by
a competent person in accordance with the relevant requirements of the current issue of:
The Gas Safety (Installation and Use) Regulations
The Building Regulations
The local water company Bylaws
The Building Standards Regulations (Scotland)
The Health and Safety at Work Act
Sheet metal parts
WARNING: When installing or servicing this boiler,
care should be taken when handling the edges of
BOILER INSTALLATION
To install the boiler, proceed as follows:
·Allowing sufficient clearances for servicing/
repair, place the template on the wall
Determine the position of the flue hole and drill
hole for flue, preferably using a 120 mm core
drill.
·Drill two holes for the hanging bracket, Plug
and screw to wall.
·Fasten lower spacing brackets to boiler (see
template)
·Remove template.
·Hang the boiler on the hanging bracket.
sheet metal parts to avoid the possibility of personal
injury.
Installing the boiler
Prior to installing the boiler, the system must be
thoroughly flushed to eliminate any foreign bodies
and contaminents such as filings, solder, particles,
oil, grease etc.
Note: Solvent products could cause damage to the
system.
Boiler
Template
34
2
857
802
410
8
7
3
Spacing plate must be attached to
boiler prior to hanging
WALL SIDE
Ø 105
Ø 8Ø 8Ø 8
BOILER SIDE
110665 B
120 mm
65 mm
691 mm
Diagram 8
555557,557,5
Ins 071a
8
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