To comply with Building Regulations Part L1 (Part 6 in Scotland) the boiler should be installed in accordance with the
manufacturer’s instructions. Self-certication that the boiler has been installed to comply with Building Regulations can be
demonstrated by completing and signing the Benchmark Checklist at the back of these instructions
Code of Practice
For the installation, commissioning and servicing of domestic heating and hot water products.
Benchmark places responsibilities on both manufacturers and installers*. e purpose is to ensure that customers** are provided
with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer's
instructions by competent persons and that it meets the requirements of the appropriate Building Regulations. Installers are
required to carry out work in accordance with the following:
Standards of Work
•Be competent and qualied to undertake the work required.
•Install, commission, service and use products in accordance with the manufacturer's instructions provided.
•Ensure that where there is responsibility for design work, the installation is correctly sized and t for purpose.
•Meet the requirements of the appropriate Building Regulations. Where this involves notiable work be a member of a
Competent Persons Scheme or conrm that the customer has notied Local Authority Control (LABC), prior to work
commencing.
•Complete all relevant sections of the Benchmark Check list/Service Record when carrying out commissioning or servicing of
a product or system.
•Ensure that the product or system is le in a safe condition and, where possible, in good working order.
•Highlight to the customer any remedial or improvement work identied during the course of commissioning or servicing
work.
•Refer to the manufacturer's helpline where assistance is needed.
•Report product faults and concerns to the manufacturer in a timely manner.
Customer Service
•Show the customer any identity card that is relevant to the work being carried out prior to commencement or on request.
•Give a full and clear explanation/demonstration of the product or system and its operation to the customer.
•Hand over the manufacturer's instructions, including the Benchmark Checklist, to the customer on completion of an
installation.
•Obtain the customer's signature on the Benchmark Checklist to conrm satisfactory demonstration and receipt of
manufacturer's instructions.
•Advise the customer that regular product servicing is needed, in line with manufacturers' recommendations, to ensure that
safety and eciency is maintained.
•Respond promptly to calls from a customer following completion of their work, providing advice and assistance by phone
and, if necessary, visiting the customer.
•Rectify any installation problems at no cost to the customer during the installer's guarantee period.
* e use of the word "installer" is not limited to installation itself and covers those carrying out installation, commissioning and/or servicing of heating and hot water products, or
the use of supporting products (such as water treatment or test equipment).
** Customer includes householders, landlords and tenants.
Service record .....................................................29
1 BOILER INSTALLATION
1.1 INTRODUCTION.
e Alpha InTec 50CS is a oor standing, high eciency, condensing, room-sealed combination boiler. e burner is lit electronically and the heat
output is controlled by a modulating fan and gas valve.
is is a combination boiler (for domestic use only) providing both central heating and domestic hot water at mains pressure.
e boiler is supplied with a pump, pressure relief valve, expansion vessel and pressure gauge fully assembled and tested. It is designed for use with a
fully pumped, sealed and pressurised central heating system.
e boiler must be installed indoors in a frost free environment.
IMPORTANT
is boiler meets the requirements for Building Regulations for unvented hot water storage systems and the Local Authority must be notied of the
intention to install. erefore the installation must be carried out by a person competent to install unvented hot water systems.
It is the law that all gas appliances are installed by a competent person, i.e. Gas Safe registered personnel, in accordance with the following
recommendations:-
Current Gas Safety (Installation and Use) Regulations
All current Building Regulations issued by the Department of the Environment, i.e. Approved Document L1.
Building Standards (Scotland) (Consolidation) Regulations issued by the Scottish Development Department
UK Water Regulations/Byelaws (Scotland)
Health & Safety Document No. 635 (e Electricity At Work Regulations 1989)
e installation should also be in accordance with the following British Standard Codes of Practice:-
BS 5440:1 Flues
BS 5546: Installation of hot water supplies for domestic purposes
BS 6700: Design, installation, testing and maintenance of services supplying water
BS 6798: Installation of gas red hot water boilers
BS 6891: Gas installation
BS 7593: Code of Practice for treatment of water in heating systems
BS 7671: Requirements for electrical installations, IEE Wiring Regulations
BS EN 12828 Heating systems in Buildings. Design for water based heating systems
BS EN 12831 Heating systems in Buildings. Method of calculation for design heat load
BS EN 14336 Heating systems in Buildings. Installation and commissioning of water based heating systems
Reference should be made to DEFRA document 'Guide to condensing boiler installation assessment procedures for dwellings'.
If installation is in a timber framed building, refer to the Institute of Gas Engineers document IGE/UP/7.
is appliance meets the requirements of IPX4D, i.e. degree of protection against moisture.
is appliance contains no asbestos and no substances have been used in the construction process that contravene the COSHH Regulations (Control
of Substances Hazardous to Health).
Failure to install this appliance correctly could lead to prosecution. It is in your own interest and that of safety to ensure that the law is complied with.
Manufacturer's instructions must NOT be taken in anyway as over-riding statutory obligations.
Notes: 1. Ensure that the Benchmark Checklist has been completed aer the boiler has been installed and commissioned.
2. It is the law that all boiler installations are registered by the installer through the Gas Safe Gas Work Notication Scheme.
3. e boiler must only be used with Alpha CD condensing ue components.
NOTE: e boiler can be supplied ready for use with Propane (LPG).
e LPG boiler is also designed for use with a fully pumped, sealed and pressurised heating system.
In addition to the regulations and requirements stated in these installation and servicing instructions, LPG boilers must be installed in accordance
with BS 5482:1 - e Installation of Propane Burning Appliances in Permanent Dwellings.
Installation pipes, cylinders and pressure regulators for LPG boilers should be tted in accordance with BS5482:1. Bulk tank installations must comply
with the requirements of the Home Oce code of practice for the storage of liqueed petroleum gas at xed installations.
LPG boilers must not be installed in a room or internal space below ground level, e.g. in a basement or cellar, except where at least one side is open to
ground level.
LPG supply pipes must be capable of delivering the required quantity of gas in addition to the demand from any other appliances in the house. e
complete installation must be tested for gas soundness against leaks.
LPG boilers have been tested and factory set for use with Propane (LPG), it should only be necessary to ensure the correct gas supply pressure of 37 mbar is
available.
INSTALLATIONUSERMAINTENANCE
3Alpha Intec 50CS
1.2 DIMENSIONS
INSTALLATIONUSERMAINTENANCE
Flue elbow centreline
133
20
23
44
307
320
A
F
60 60
E
G
80
40 40
C
45 45 40
I
B
6
850
650
Height (mm)Width (mm)Depth (mm)
850650600
Connections
GasDomestic hot waterCentral heating
ABCEF
3/4"1/2"1/2"3/4"3/4"
1.3 CONNECTIONS
Gas connection:
e boiler is designed to operate with Natural
gas (Cat I2H 2H - G20 - supplied at 20 mbar)
or Propane gas (Cat I3P 3P - G31 - supplied
at 37 mbar). Supply pipes must be the same
as or larger than the 3/4" boiler tting. Before
connecting the gas line, carefully clean inside all
the supply pipes to remove any residue that could
impair boiler performance. Also make sure the
gas corresponds to that for which the boiler is
prepared (see boiler data-plate).
e gas supply pipe must be suitably dimensioned
according to current regulations in order to
guarantee correct gas ow to the burner even
in conditions of maximum boiler output and
to guarantee appliance efficiency (technical
specications).
Storage tanks (LPG):
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance causing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
973
600
Hydraulic connection:
Important: in order not to void the warranty
before making the boiler connections, carefully
ush the heating system (pipes, radiators, etc.)
with de-scaling products to remove any deposits
that could compromise correct boiler operation.
For further detail see Section 1.12.
Mains cold water
DHW
Power supply cable
57
H
211
65
70
D
A - Gas
B - Domestic hot water outlet
C - Cold water inlet
D - Condensate outlet
E - Central heating return
F - Central heating ow
G - DHW temp/press relief valve
H - CH pressure relief valve
I - Secondary circuit (optional)
Safety valve
CH return
CH flow
Gas
814
Fig. 1-1
Fig. 1-2
4Alpha Intec 50CS
Condensate drain:
To drai n the condensate produced by the
appliance, it is necessary to connect to the
drainage system by means of acidic condensate
resistant pipes having a diameter of at least 22
mm. e system connecting the appliance to the
drainage system must be carried out in such a way
as to prevent freezing of the liquid contained in
it. Before appliance commissioning, ensure that
the condensate can be correctly removed. Also,
comply with national and local regulations on
discharging waste waters.
For further detail see Section 1.11.
Electrical connection:
e boiler has an IPX5D protection rating for the
entire appliance. Electrical safety of the appliance
is reached only when it is correctly connected
to an ecient earthing system as specied by
current safety standards.
e power supply cable must be connected to a
230V ±10% / 50Hz mains supply respecting L-N
polarity and earth connection
must also have a multi-pole circuit breaker.
, this network
1.4 REMOTE CONTROLS AND
PROGRAMMABLE ROOM
THERMOSTATS OPTIONAL
e boiler is suitable for use with programmable
room timer thermostats or remote controls,
which are available as optional kits.
Alpha programmable room thermostats are
connected with 2 wires only. Carefully read the
user and assembly instructions supplied with
the kit.
Installation on low temperature system:
e boiler can directly supply a low temperature
system by acting on parameter 'P66' (Service
Engineers Document - Programming the PCB)
and setting the ow temperature adjustment
range 'P66/A' and 'P66/B'. In this situation it is
good practice to insert a safety device in series
with the power supply and boiler. is device is
made up from a thermostat with a temperature
limit of 60°C. e thermostat must be positioned
on the system ow pipe at a distance of at least 2
metres from the boiler.
1.5 EXTERNAL TEMPERATURE SENSOR
OPTIONAL
e boiler is suitable for use with the external
sensor (Fig. 1-3), which is available as an optional
kit. The sensor can be connected directly to
the boiler electrical system and allows the
maximum ow temperature to be automatically
decrea sed whe n the exter nal temperature
increases, in order to adjust the heat supplied to
the system according to the change in external
temperature. e external sensor always operates
when connected, regardless of the presence or
type of room thermostat used and can work
in combination with Alpha programmable
thermostats. e correlation between system
ow temperature and external temperature is
determined by the parameters set in menu 'M5'
under 'P66' according to the curves represented
in the diagram (Fig. 1-4). e external sensor
must be connected to terminals 38 and 39 on
the boiler PCB, (Fig. 3-2).
INSTALLATIONUSERMAINTENANCE
45
58
31
Fig. 1-3Fig. 1-4
e following controls for the InTec50CS are also available from Alpha:
Part No. 3.021395, CAR V2 ....................InTec50CS wired modulating thermostat
Part No. 3.021622, Crono 7 .....................InTec50CS wired digital thermostat
Part No. 3.021624, Crono 7RF ................InTec 50CS wireless digital termostat
Flow temperature depending on the external temperature and user
adjustments of the central heating temperature.
T
T Max
T Min
EXTERNAL SENSOR:
T = Central heating temperature
TE = External temperature.
TMAX - TMIN = Selected ow temp. range.
OFFSET
TE
TE MaxTE Min
5Alpha Intec 50CS
openings of the
1.6 FIT THE FLUE FIGS. 5 AND 16
e following procedure applies to tting an
Alpha CD Easy-Flue to both rear or side exit
ue - horizontally only.
- e CD Easy-Flues are suitable for use in the
ue length ranges shown in the tables in Figs
1-5 and 1-6.
Note: Where the length is less than the
minimum or more than the maximum, refer
to Section 1.7.
INSTALLATIONUSERMAINTENANCE
Boiler
Rear Flue
(B + C)
Using a single
CD Easy-Flue
500 mm
1000 mm
B + C (mm)
Max
Min
355
130
800
590
Fig. 1-5 Rear ue
(B + C)
Using a singleCD
Easy-Flue
500 mm
1000 mm
Side Flue
Boiler
- Determine the overall length (L) of ue required, (see Fig. 1-7) as follows:-
Rear exit L = wall thickness (B) + distance between boiler and wall (C) + 230 mm
le exit L = wall thickness (B) + distance between boiler and wall (C) + 442 mm
Right exit L = wall thickness (B) + distance between boiler and wall (C) + 58 mm
B + C (mm)
Min
Max
-
143
378
742
Boiler
L
(B + C)
Side Flue
Right hand exit ueLe hand exit ue
Using a single
CD Easy-Flue
500 mm
1000 mm
B + C (mm)
Min
Max
302
527
762
972
Fig. 1-6 Side ue
Seal joint with tape
- Adjust the telescopic section of the ue to
the distance 'L', ensuring that the two labels
marked 'TOP' are aligned, then seal and secure
the joint between the ducts with the sealing
tape supplied.
Note: Always ensure that there is a minimum
overlap of 25 mm when fully extending the
telescopic section.
- Pass the ue assembly through the wall (from
inside or outside).
Fig. 1-7
Note: Internal tting - If there is no access to
make good the outside wall, locate the outside
(black) ue sealing collar onto the outer duct
of the ue immediately before the terminal
grille onto the location provided. Push the
ue assembly through the 130 mm ue hole,
so that the collar completely passes through
the wall. en pull the ue assembly back into
the correct position. Visually check that the
collar is sealing the outside wall and that it is
not restricting any of the openings of the ue
terminal. See Fig. 1-8.
130 mm
Fig. 1-8 - Fitting the ue from inside
Check collar is
sealing the wall
and it is not
restricting any
flue terminal
6Alpha Intec 50CS
- Position the smaller Easy-Flue 40 mm clamp
(with seal) supplied, over the bend. Fit the bend
to the boiler and rotate to the correct position.
Secure in position using the clamp. Ensure the
clamp is located centrally over both the bend
and boiler adaptor.
- Fit the inside (white) ue sealing collar over the
Easy-Flue. If it was not previously tted, t the
outside (black) ue sealing collar onto the ue
immediately before the terminal grille onto the
location provided.
Ensure the inner duct within
the terminal is at the top.
The inner duct must
Note:
be positioned to slope towards
the boiler
Terminal
Flue sealing collar
- Slide the larger Easy-Flue 45 mm clamp over
the outer duct and pull the flue assembly
towards the bend, locating the inner duct into
the seal joint on the bend. Ensure the labels
marked 'TOP' are positioned at the top before
securing the ue assembly to the bend with the
clamp (three screws) located centrally over the
joint.
Inner duct seal
120
20
65
CD Easy-Flue
210
Note: Check the ue terminal protrudes 120
mm out of the wall and the inner duct of the
terminal is positioned correctly (see Fig. 1-9).
- Make good the inside wall by pushing the
inside ue sealing collar upto the wall.
INSTALLATIONUSERMAINTENANCE
This dimension will be greater
if the boiler is not against the wall
End of outer duct
Inner duct
Easy-Flue 45 mm clamp
Elbow seal joint
90° bend
Easy-Flue 40 mm clamp
and seal
Side of boiler
Note: Ensure the outer flue duct is horizontal
1.7 REDUCING THE FLUE FIG. 110
When the ue length required is less than the
minimum stated in Section 1.6, paragraph 1,
refer to Fig. 1-10.
Discard the rst telescopic section (not the
section with the terminal) of the Easy-Flue
1000 mm or 500 mm and cut to the required
length.
Note: Ensure that all cuts are square and free
from burrs.
Once assembled with the components pushed
home, the ue is fully sealed.
Allow 20 mm
30 mm
307
This dimension will be greater
if the boiler is not against the wall
Fig. 1-9 - Rear ue
Do not cut past this point
Fig. 1-10
7Alpha Intec 50CS
1.8 EXTENDING THE FLUE FIG. 111
40 mm clamp
Note: e ue assembly length must not
exceed the maximum length stated, including
the equivalent lengths of any extensions, bends
etc. used for plume management components.
InTec boilers must not exceed the maximum of
an equivalent horizontal ue length of 12 m.
- When the ue length required is more than the
maximum stated in Section 1.6, paragraph 1,
refer to the table below and Fig. 1-6.
INSTALLATIONUSERMAINTENANCE
Rear Flue length (B + C)
Up to maximum:-
11.885 m
Additional support brackets are required when extending the ue. ese are available from Alpha, Part No. 6.1000355.
Side Flue length (B + C)
Up to maximum:-
11.805 m
Comments
Alpha CD 750 mm ue extension (Part No. 6.2000750) or 1000 mm extension (Part No.
6.2001050) is required to extend the range of telescopic ue.
Refer to Section 1.8 for instructions on how to extend the ue.
Note: A 130 mm ue hole (127 mm core drill) may be required in the wall. is is when
the extended ue is passed through the wall.
- Use the template (supplied with the boiler) to
mark the required ue position, ensure the
slope towards the boiler is correct.
- Determine the overall ue length as described
in Section 1.6, paragraph 2 to determine the
number of Alpha CD 750 or 1000 mm ue
extensions required.
- Assemble the flue extensions together by
locating the inner duct into the seal joint
and secure each extension together with the
extension clamps supplied (three screws).
Ensure that the clamps are positioned centrally
over the joints.
Note: If it is required to cut an extension,
DO NOT cut the end of the inner duct that
incorporates the seal joint. Ensure the inner
duct end without the seal joint is cut so that it
is 20 mm longer than the outer duct.
Ensure that all cuts are square and free from
burrs.
Once assembled with the components pushed
home, the ue is fully sealed.
Ensure the inner duct within the terminal
is at the top.
The inner duct must be positioned
Note:
to slope towards the boiler
120
20
- Adjust the telescopic section of the Easy-Flue
to the required length and secure the Easy-Flue
with the sealing tape supplied. Fit the Easy-Flue
to the extensions by locating the inner duct into
the seal joint and secure with the clamp (three
screws), ensuring it is located centrally over the
joint.
- Mark the end of the ue assembly 'TOP' where
it is connected to the boiler, so that the 'TOP'
of the ue terminal is aligned with the 'TOP'
at the boiler end of the ue assembly.
- Pass the complete ue assembly through the
wall.
- Position the smaller Easy-Flue 40 mm clamp
(with seal) supplied, over the bend. Fit the bend
to the boiler and rotate to the correct position
and secure in position. Ensure the seal is
located centrally over both the bend and boiler
adaptor. If the inside sealing collar (white) is
being used to make good the inside wall, then
it will need to be tted before assembling the
ue.
Ensure outer flue duct of Easy-Flue is horizontal
CD Easy-Flue
Extension clamp
Inner seal joint
- Slide the larger Easy-Flue 45 mm clamp (two
screws) over the outer duct and pull the ue
assembly towards the bend, locating the inner
duct into the seal joint on the bend.
- Secure the ue assembly to the bend with the
clamp ensuring it is positioned centrally over
the joint, ensuring the 'TOP' marked on the
outer duct is positioned at the top.
Note: Check the ue terminal protrudes 120
mm out of the wall and that the inner duct
of the terminal is positioned correctly, i.e. the
inner duct within the terminal is at the top. See
Fig. 1-11 or 1.12.
- Make good the outside wall by fitting the
outside sealing collar (black) onto the location
provided immediately behind the ue terminal
grille. Make good the inside wall using the
inside sealing collar (white) if required.
Ensure the flue extension slopes
downwards towards the boiler by a
minimum of 25 - 30 mm per metre
Easy-Flue 45 mm clamp
Terminal
Flue sealing
collar
Inner seal joint
Flue length (L)
CD Flue extension
End of extension
8Alpha Intec 50CS
422
517
90° bend
Easy-Flue
and seal
Seal joint
Front of boiler
Fig. 1-11 - Le side ue
Ensure the flue extension slopes
lue sealing
downwards towards the boiler by a
minimum of 25 - 30 mm per metre
Easy-Flue 45 mm clamp
90° bend
Easy-Flue
40 mm clamp
and seal
Seal joint
Ensure outer flue duct of Easy-Flue is horizontal
Extension clamp
Inner seal joint
CD Flue extension
End of extension
38
Ensure the inner duct within the terminal
is at the top.
Note:
to slope towards the boiler
CD Easy-Flue
Inner seal joint
The inner duct must be positioned
120
20
INSTALLATIONUSERMAINTENANCE
Terminal
F
collar
133
Front of boiler
1.9. FIT PLUME MANAGEMENT
COMPONENTS OPTIONAL
e following procedures detail the options
for management of the exhaust ue gas/plume
emitted from the terminal.
- e terminal supplied with the Easy-Flue can
be altered to divert exhaust ue gas/plume at
an angle.
is can be achieved by simply turning the end
section of the terminal to the desired angle.
- e CD Easy-Flue can be converted to allow the
inner ue duct to be extended so as to position
the terminal in an area where the exhaust ue
gas/plume will not cause a nuisance. is can
be done before or aer installation of the ue,
providing there is access to the terminal from
outside.
a. Remove the screws (1 in Fig. 1-13) securing
the terminal and remove the terminal by
pulling it from the ue assembly. Remove the
screw (2 in Fig. 1-13) securing the terminal
end section and remove the end section from
the terminal.
Flue length (L)
b. Locate a 93° Plume Management bend
into the ue assembly and rotate it to the
direction required.
c. Connect to the 93° bend the required Plume
Management components as detailed and
refer to Fig. 1-14.
Notes:
- e wall support brackets must be used to
secure the Plume Management pipework
to the wall and prevent disconnection of
the 93° bend from the ue assembly or any
other component.
- Each joint must be secured with one of
the screws provided to prevent accidental
disconnection.
- Ensure there is always a slight slope
towards the ue assembly tted in the
wall and there is no part of the plume
management pipework where condensate/
rain will collect and cause a blockage or any
restriction.
Fig. 1-12 - Right side ue
d. Terminate the Plume Management pipework
by tting the terminal end section (push-t)
previously removed. Refer to Fig. 1-13.
e. The Plume Management components
available for extending the inner ue duct
are as follows:-
Plume Management 93° bend 60 mm dia.
(each 93° bend equivalent to 1.3 m flue
length)
Plume Management 45° bend 60 mm dia.
(each 45° bend equivalent to 0.9 m flue
length)
Plume Management 1000 mm extension 60
mm dia. (equivalent to 1 m ue length)
60 mm dia. wall bracket
1
1
2
Fig. 1-13
9Alpha Intec 50CS
INSTALLATIONUSERMAINTENANCE
Terminal end section
from CD Easy-Flue
Min.
400 mm
C
Terminal end
section from
CD Easy-Flue
Notes:
1. Ensure each joint is secured
with the screw supplied.
2. Ensure there is always a
slight slope towards the CD
Easy-Flue so that there is no
part of the pipework where
condensate will collect.
C
Terminal end section
from CD Easy-Flue
PM length = C + (2 x 93° bend = 2.6 m) + (2 x 45° bends = 1.8 m)
Ensure there is a slope of approximately
Flue sealing collar
CD Easy-Flue
PM length = C + (1 x 93° bend = 1.3 m) + (2 x 45° bends = 1.8 m)
Note: e equivalent horizontal ue assembly length + the equivalent plume management length (PM length) must not exceed the
maximum ue length stated for the boiler, i.e. e boiler maximum equivalent ue length must not exceed 12 metres.
3° back towards the Easy-Flue
PM length = C + (4 x 93° bend = 5.2 m)
C
Fig. 1-14
10Alpha Intec 50CS
Not less than
300 mm
H
Not less than
300 mm
1.10. VERTICAL FLUE OPTIONS
Hmax = 15 mHmax = 13.2 m
Not less than
300 mm
Not less than
300 mm
INSTALLATIONUSERMAINTENANCE
H
Fig. 1-15
1.11 DISPOSAL OF CONDENSATE.
Provision must be made for the safe disposal
of condensate produced by the ue gases of the
Alpha InTec boilers and reference should be made
to BS 6798 for the requirements on the disposal
of condensate.
e boilers incorporate a condensate trap which
has a seal of 75 mm, therefore no additional trap
is required.
The condensate should ideally be discharged
internally into an internal waste pipe (washing
machine/sink waste) or soil pipe to avoid the
possible risk of freezing. e pipework must be
in 22 mm pipe.
External pipe runs should be avoided, but if it is
necessary, the pipework should be protected from
the risk of freezing with waterproof insulation
and the length should be kept to a maximum
of 3 m and the condensate pipework should be
increased to a minimum of 32 mm diameter.
Termination should be into an external gulley or
soakaway as shown in Figs. 1.16 and 1.17.
Plastic pipe
Note: All pipework must have a continuous fall
(see Figs. 1.16 and 1.17) from the boiler and must
be of an acid resistant material such as plastic
waste pipe. (copper or steel is not suitable).
It should be noted that the connection of a
condensate pipe to a drain may be subject to local
building control requirements.
Optional Condensate Trace Heating Kit
An optional Alpha InTec trace heating kit is also
available to prevent the condensate from freezing.
The control of this kit works with a unique
patented design using the boiler PCB to control
the trace heating. e outside weather probe
measures the external temperature, activating
the trace heating cable only when the boiler is
in operation and producing condensate. is
feature together with the latest technology
variable resistance heating cable ensures only a
small amount of electrical energy is used.
Use waterproof
pipework insulation
in very exposed
positions
Ensure pipe is
adequately supported
If the external temperature drops below 2°C
and the boiler is on, the relay PCB is operated
and voltage is supplied to the trace heating wire
causing it to heat up and prevent the condensate
from freezing. When the outside temperature
rises to 4°C or the boiler pump stops, the trace
heater is switched o. e connection of the
outside weather probe supplied with this kit
also enables the weather compensation feature
on the boiler.
Open end of pipe
Minimum gradient 2½°
diverted into gully
below grid but above
water level
Fig. 1-16
11Alpha Intec 50CS
INSTALLATIONUSERMAINTENANCE
22mm termination from boiler, increase to 32 mm if external
Cement mortar sealing
500 mm min.
O
2½ fall
25mm
100mm plastic tube
Ground level (either/or)
300mm
Bottom of tube sealed
Soakaway depth 400mm
filled with limestone chippings
1.12 FLUSH THE SYSTEM.
It is essential that the central heating system is
thoroughly cleaned and ushed when tting
an Alpha InTec boiler. Failure to do so will
invalidate the warranty.
If a cleaning agent and inhibitor are used,
they must be applied in accordance with their
manufacturers instructions. Only products
from Fernox and Sentinel are acceptable for
use with the Alpha InTec boilers. Further
information can be obtained from Fernox
(Tel: 0870 870 0362) or Sentinel (Tel: 0151 420
9563).
e system should be ushed in accordance
with BS 7593 and BS EN 14336. e following
procedures are recommended:
- Installing onto a new system: Fill the system, vent at automatic air vents
and radiators.
Check for leaks.
Drain the system.
If required, chemically clean the system as
instructed by the recommended cleaner
manufacturer.
Note: Ensure that the system is ushed to
remove any remains of the cleaner.
If chemical cleaner is not used to clean the
system:-
a Rell the system.
b Switch on the boiler and allow the
system to heat up to the normal
operating temperature.
c Switch o the boiler and drain the
system while the water is still hot.
d Rell the system and check for leaks.
As required, add the recommended inhibitor
to the system as instructed by the
inhibitor manufacturer.
Two rows of 3 x 12mm
holes at 25mm centres,
50mm from the bottom
of the tube. Holes to face
away from house.
- Installing onto an existing system, clean the
system before tting the new boiler:-
If the old boiler is still working:-
a Switch on the boiler and allow the
system to heat up to the normal
operating temperature.
b Switch o the boiler and drain the
system while the water is still hot.
c Rell and chemically clean the system
as instructed by the recommended
cleaner manufacturer.
d Ensure the system is ushed to remove
any remains of the cleaner.
e Fit the new boiler.
If the old boiler is not working:-
a Drain the system.
b Remove the old boiler.
c Flush the system through.
d Fit the new boiler.
e Rell and chemically clean the system
as instructed by the recommended
cleaner manufacturer.
f Ensure the system is ushed to remove
any remains of the cleaner and check
for leaks.
As required, add the recommended inhibitor
to the system as instructed by the
inhibitor manufacturer.
Fig. 1-17
1.13 FILL THE SYSTEM.
e boiler is tted with two automatic air vents
(see Fig. 1.18), ensure that the vents are always
open.
Open the central heating ow and return valves.
Open the ll point valves on the lling loop until
water is heard to ow.
To remove the air - Vent each radiator in turn,
starting with the lowest in the system.
It is important that the pumps are properly
vented to avoid them running dry and damaging
the bearings. Unscrew and remove the cap
from the centre of the pump. Using a suitable
screwdriver rotate the exposed spindle about
half a turn, then replace the cap.
Check the operation of the pressure relief valve
(see Fig. 1.18) by turning the head anti-clockwise
until it clicks. e click is the valve liing o its
seat allowing water to escape from the system check that this is actually happening.
Continue to ll the system until the pressure
gauge indicates 1.0 bar. Close the ll point valve
and check the system for water soundness,
rectifying where necessary. Disconnect the lling
loop from the mains supply.
Water may be released from the system by
manually opening the drain point (see Fig. 1.18)
until the system design pressure is obtained. e
system design pressure (cold) should be between
0.75 and 1.25 bar.
Open the cold water mains inlet valve (see Fig.
1.18). Turn on all hot water taps and allow water
to ow until no air is present. Turn o taps.
Ensure that the condensate trap has been lled
with water. Refer to Section 1.11.
12Alpha Intec 50CS
1.14 CIRCULATION PUMP FIG. 118.
e Alpha Intec boilers are supplied with 2 types
of pump, both with variable speed adjuster.
ese settings are suitable for most systems.
•Boiler pump. e motor has a 3- speed control.
e boiler does not operate correctly with the
control set at the slowest speed. For optimal
functionality, use the pump at maximum speed
(max. head).
Pump release. If the pump becomes stuck aer
a long period of inactivity, it must be released.
Loosen the front cap, making sure that the
water that escapes cannot cause injury/damage
to persons/objects and turn the motor sha
very carefully using a screwdriver so as not
to damage the sha. Once the pump has been
released, close the vent cap.
•Zone 1 pump. The pump is ideal for the
requirements of each heating system in a
domestic and residential environment. In fact,
the pump is equipped with electronic control
that allows the advanced functions to be set.
Programme P (P-V) - Proportional curve
(Green LED). This allows the head to be
proportionally reduced as the system heat
demand decreases (ow rate reduction). Due
to this function, the electrical consumption
of the pump will be reduced: the power used
by the pump decreases together with the
pressure level and ow rate. With this setting,
the pump guarantees optimal performance
in most heating systems, there by being
particularly suitable in single-pipe and twopipe installations. Any noise of the water ow
in the pipes, valves and radiators is eliminated
by reducing the head.
Programmes C3 and C4 (P-C) - Constant
curve (White or Orange LED). e pump
maintains a constant head as the system heat
demand decreases (ow rate reduction). With
these settings, the pump is suitable for all oor
systems where all the circuits must be balanced
for the same drop in head.
MIN-MAX Program (Blue LED). e pump
is distinguished by adjustable operating curves
by positioning the selector in any point between
the Min and Max positions, thereby satisfying
any installation requirement (from a simple
single-pipe to more modern and sophisticated
systems) and always guarantee optimum
performance. e precise working point can be
selected in the entire eld of use by gradually
adjusting the speed.
Adjustments. Turn the selector and set it on
the desired curve to adjust the pump.
Diagnostics in real time: a bright LED
(in various colours) provides information
regarding the pump operating status.
ProgrammeLED colour
P (ΔP-V)green
C3 (ΔP-C) - H=3 mwhite
C4 (ΔP-C) - H=4 morange
Min - Maxblue
ATTENTION! e pump is
blocked but still live.
red
Possible pump release. A stuck pump is
indicated by a xed red LED. Turn the selector
up to the MAX position, disconnect and
reconnect the power to restart the automatic
release process. e pump will then activate
the procedure that will last a maximum of
15 minutes and the LED will ash upon each
restart. It then turns blue for a few seconds
and goes back to red if the attempt to restart is
not successful. Once the process is complete,
set the selector back to the desired curve and
if the problem has not been resolved, perform
the manual release procedure as follows.
- Disconnect the power to the boiler (the LED
goes o).
- Close the system ow and return and let the
pump cool down.
- Empty the system circuit via the relative valve.
- Remove the motor and clean the impeller.
- Once the release is complete, remount the
motor.
- Fill the primary circuit; restore the power of
the boiler and set the desired curve.
Important: Take care if the system has been in
operation as the water may be HOT.
INSTALLATIONUSERMAINTENANCE
13Alpha Intec 50CS
6
C
5
60
50
INSTALLATIONUSERMAINTENANCE
4
3
Head (m)
2
1
0
0
6
5
4
3
Head (m)
2
1
0
0
A
B
D
200400600800100012001400160018002000
Flow (l/h)
A = Head available to the system with pump at maximum speed
B = Head available to the system with pump at minimum speed
C = Pump power at maximum speed
D = Pump power at minimum speed
E
G
F
J
H
200400600800100012001400160018002000
Flow (l/h)
I
40
30
20
10
0
60
50
40
30
20
10
0
Power (W)
Power (W)
E = Head available to the system with pump selector in position C4 (standard setting)
F = Head available to the system with pump selector in position P
G = Head available to the system with pump selector in position C3
H = Pump power with selector in position P
I = Pump power with selector in position C4 (standard setting)
J = Pump power with selector in position C3
Fig. 1-18
14Alpha Intec 50CS
1.15 BOILER COMPONENTS
11
12
13
14
15
16
10
18
17
1
2
3
4
5
6
7
8
9
19
20
21
22
23
24
25
26
27
3334
INSTALLATIONUSERMAINTENANCE
28
29
30
31
32
35
36
1 - Gas valve
2 - Flue thermostat
3 - DHW expansion vessel (3 litre)
4 - Flame sensing electrode
5 - System pump
6 - Automatic air vent
7 - Hydraulic manifold
8 - Fan
9 - Check valve
10 - Domestic hot water temperature sensor
11 - System pressure switch
12 - Manifold drain tap
13 - Automatic air vent
14 - Boiler pump
15 - Hot water store drain tap
16 - System drain tap
17 - Flue gas sampling point
18 - Pressure test points
19 - Manual air vent
20 - Ignition generator
21 - Air supply pipe
22 - Condensing heat exchanger
23 - Burner
24 - Ignition electrode
25 - Venturi
26 - Flow sensor
27 - Burner injector
28 - Overheat thermostats
29 - System safety valve (3 bar)
30 - Condensate trap
31 - Diverter valve
32 - System expansion vessel (11.7 litre)
33 - Hot water cyliner assembly (53 litre)
34 - Control panel
35 - Inlet lter, ow regulator, check valve tting
36 - domestic hot water safety valve (8 bar)
Fig. 1-19
15Alpha Intec 50CS
USER INSTRUCTIONS.
2
2.1 SERVICING.
Imp ortant: the boil er requires perio dical
maintenance and regular checks of energy
eciency in compliance with national, regional
or local provisions in force.
is ensures that the optimal safety, performance
and operation characteristics of the boiler remain
unchanged over time.
INSTALLATIONUSERMAINTENANCE
We re c ommend a ye arly c leaning a nd
maintenance contract with your Service engineer.
2.2 GENERAL WARNINGS.
Use of the boiler by unskilled persons or children
is strictly prohibited.
For safety purposes, check that the ue terminal
is not blocked.
2.3 CONTROL PANEL.
If temporary shutdown of the boiler is required,
proceed as follows:
a) drain the water system if anti-freeze is not
used.
b) shut-o all electrical, water and gas supplies.
In the case of work or maintenance to structures
located in the vicinity of ducting or devices
for flue extraction and relative accessories,
switch o the appliance and on completion of
operations ensure that a qualied technician
checks eciency of the ducting or other devices.
Never clean the appliance or connected parts
with highly ammable substances.
Never leave containers and ammable substances
in the same environment as the appliance.
•Attention: the use of components that employ
electrical power requires some fundamental
rules to be observed:
- do not touch the appliance with wet or
moist parts of the body; do not touch when
barefoot;
- never pull electrical cables or leave the
appliance exposed to atmospheric agents
(rain, sunlight, etc..);
- the appliance power cable must not be
replaced by the user;
- in the event of damage to the cable, switch o
the appliance and only contact qualied sta
for replacement;
- if the appliance is not to be used for a certain
period, disconnect the main power switch.
N.B.: the temperatures indicated by the display
has a tolerance of +/- 3°C due to environmental
conditions that cannot be blamed on the boiler.
Key
- Stand-by / On Button
A - Summer (
B - DHW priority button ()
C - (RESET) /menu exit (ESC) reset button
D - Menu entry button (MENU)/ data conrmation (OK)
1 - Domestic hot water temperature selector switch
2 - Domestic hot water temperature set
3 - Central heating temperature selector switch
4 - Central heating temperature set
) and winter ( ) functioning mode selection button
1
1011 12
13
14
5 - Presence of anomalies
6 - Display of boiler operating mode
8 - Flame presence symbol and
relative output scale
9 and 7 - Primary heat exchanger output
water temperature
10 - Boiler in stand-by
11 - Boiler connected to remote
control (Optional)
12 - Functioning in summer mode
13 - Anti-freeze function in progress
14 - Functioning in winter mode
15 - Domestic hot water priority
functioning active
23
24
8
15
16 - Presence of external connected
devices
17 - Display of menu items
18 - Functioning with external
temperature probe active
19 - Display of data conrmation or
menu access
20 and 7 - External temperature display
that appear on the status display (item 6 in
Fig. 2-1) together with a brief description.
Display (item 6) Description of operating mode
SUMMER
WINTER
DHW ON
CH ON
F3
Summer operating mode without request in progress.
Boiler in stand-by for domestic hot water request.
Winter operating mode without request in progress.
Boiler in stand-by for domestic hot water or central heating request.
Domestic hot water mode in progress.
Boiler operating, domestic hot water heating in progress.
Central heating mode in progress.
Boiler operating, central heating in progress.
Anti-freeze mode in progress.
Boiler operating to restore the minimum safety temperature against boiler freezing.
With domestic hot water priority disabled (item 15 sysmbol o), the boiler only operates
DHW OFF
in central heating mode for 1 hour, however keeping the domestic hot water store at
minimum temperature (20°C), aer which the boiler goes back to the normal operation,
previously set.
Post ventilation in progress.
F4
Fan in function aer a request for domestic hot water or central heating in order to
evacuate residual fumes.
Post circulation in progress.
F5
Pump operating aer a request for domestic hot water or central heating in order to cool
the primary circuit.
e optional environment thermostat (TA) not working, the boiler functions all the time
P33
in central heating mode. (Can be activated through the 'Customisation' menu. It allows
activation of the central heating even if the TA is out of order).
Reset attempts nished.
STOP
Wait for 1 hour to re-acquire 1 attempt.
(See Ignition failure on following page).
ERR xx
SET
SET
Fault present with relative error code.
e boiler does not work. (see Section 2.6, fault signals).
During rotation of the domestic hot water temperature selector switch (item 1 Fig. 2-1)
the adjustment status of the domestic hot water temperature is displayed.
During rotation of the central heating selector switch (item 3 Fig. 2-1) the adjustment
status of the boiler ow temperature for central heating is displayed.
In presence of the external probe (optional) replace the 'SET' item.
SET
e value that appears is the correction of the ow temperature with respect to the
functioning curve set by the external probe. See OFFSET on external probe graphics (Fig.
1-4).
System deaeration in progress.
F8
During this phase, which lasts 18 hours, the boiler pump is started at pre-established
intervals, thus allowing deaeration of the central heating system.
2.5 USING THE BOILER.
Refer to Fig. 2-1.
Before lighting make sure the central heating
system is lled with water and that the pressure
gauge (item 23) indicates a pressure of 1 - 1.2 bar;
Open the gas cock upstream from the boiler.
With the boiler o, only the stand-by symbol
(item 10) appears on the display. By pressing the
(
) button the boiler switches on.
Once the boiler is on, by pressing button 'A'
repeatedly, the operating mode changes and
passes alternatively from summer (
winter (
) operating modes.
) and
•Summ er (
): in this mod e the boi ler
operates only to provide domestic hot water.
The temperature is set using the selector
switch (item 1) and the relative temperature
(item 2) is indicated on the display and the
'SET' indication appears (Fig. 2-2). By turning
the selector switch (item 1) in a clockwise
direction the temperature increases and in an
anti-clockwise direction it decreases.
Set domestic hot water temperature
SET DHW
6
Fig. 2-2
1
2
°C
ESC
During the heating of the domestic hot water
'DHW ON' appears on the status display
(item 6) and at the same time as the burner
lights the ame presence display switches on
(item 8) together with the output scale next
to it. e displays (items 7 and 9) indicate the
instantaneous outlet temperature from the
primary heat exchanger. As shown in Fig. 2-3.
Summer operating mode with domestic hot
water only
12
°C
DHW ON
7
8
°C
MENU
6
9
1
2
Fig. 2-3
•Winter( ): in this mode the boiler operates
to provide both domestic hot water and central
heating. e temperature of the domestic hot
water is always adjusted using the selector
switch (item 1), the central heating temperature
is adjusted using the selector switch (item 3)
and the relative temperature is indicated on the
display (item 4) and the 'SET' appears on the
status display (item 6). As shown in Fig. 2-4.
By turning the selector switch (item 3) in a
clockwise direction the temperature increases
and in an anti-clockwise direction it decreases.
Set the central heating ow temperature
3
°C
ESC
SET
6
4
Fig. 2-4
During the request for central heating 'CH ON'
appears on the status display (item 6) and at the
same time as burner lights the ame presence
display switches on (item 8) together with the
output scale next to it. e displays (items
7 and 9) indicate the instantaneous outlet
temperature from the primary heat exchanger.
As shown in Fig. 2-5.
Winter operating mode with domestic hot
water and central heating
14
8
1
2
°C
CH ON
697
3
°C°C
MENU
4
Fig. 2-5
In the central heating mode, if the temperature
of the water contained in the system is sucient
to heat the radiators, the burner will shut o
and only the pump will operate.
INSTALLATIONUSERMAINTENANCE
17Alpha Intec 50CS
•Domestic hot water priority function By
pressing button 'B' the DHW priority function
is deactivated, which is marked by the switcho of the symbol (item 15 in Fig. 2-1) on the
display. e disabled function keeps the water
contained in the storage tank at a temperature
of 20°C for 1 hour, giving the priority to central
heating.
•Functioning with external sensor (Fig. 2-6)
optional. In the case of a system with optional
external sensor, the boiler ow temperature
for central heating is managed by the external
INSTALLATIONUSERMAINTENANCE
sensor depending on the external temperature
measured (Par. 1.5). It is possible to modify
the ow temperature from -15°C to +15°C
with respect to the adjustment curve (Fig.
1-4 Oset value). is correction, which can
be activated using the selector switch (item
3) is kept active for any external temperature
measured. The modification of the offset
temperature is indicated on the display (item 7).
e temperature indicated on the display (item
4) is the current ow temperature and aer a
few seconds from the modication it is updated
with the new correction. 'SET' appears on the
status display (Fig. 2-6). By turning the selector
switch (item 3) in a clockwise direction the
temperature increases and in an anti-clockwise
direction it decreases.
Set central heating ow temperature with
external sensor (optional)
°C
°C
ESC
SET
647
During a request for central heating 'CH ON'
appears on the status indicator (item 6) and at
the same time as burner lights the ame presence
display switches on (item 8) together with the
output scale next to it. e displays (items 7 and
9) indicate the instantaneous outlet temperature
from the primary heat exchanger. In the central
heating mode, if the temperature of the water
contained in the system is sucient to heat the
radiators, the boiler will only function with the
activation of the boiler pump.
Winter operating mode with external
sensor (optional)
14
8
CH ON
697
°C°C
°C
MENU
1
2
Fr om t h is m oment the b oil er operat es
automatically. With no demand for heat (central
heating or domestic hot water) the boiler goes
into 'stand-by' mode, equivalent to the boiler
being powered without the boiler alight.
3
18
3
4
18
Fig. 2-6
Fig. 2-7
Note: e boiler may start-up automatically if the
anti-freeze mode is activated, (item 13 Fig. 2-1).
Also, the boiler can operate for a brief period
of time aer a demand for domestic hot water
in order to return the domestic hot water store
back to temperature.
Important: With the boiler in stand-by mode
(
) hot water cannot be produced and the
safety systems cannot be guaranteed, such as
pump anti-block, anti-freeze and three way
anti-block.
2.6 FAULT SIGNALS.
e Alpha InTec boiler signals any faults by the
ashing symbol (item 5 in Fig. 2-1) along with
'ERRxx' on the staus display (item 6). Where 'xx'
corresponds to the error code described in the
following table.
Fault signalled
Error
code
Ignition failure01
Safety thermostat fault
(overheating), ame control fault
02
Flue safety thermostat fault03
Short circuit or bad connection04
Flow sensor fault05
Maximum number of resets reached08
Insucient system pressure10
Storage tank sensor fault12
Conguration error15
Fan fault16
Flame sensing fault20
Return sensor fault23
Push button control panel fault24
Insucient circulation27
Loss of remote control
communication
31
Low temperature zone 2 sensor fault32
Low temperature zone 3 sensor fault33
Low temperature zone 2 safety
thermostat operation
Low temperature zone 3 safety
thermostat operation
34
35
IMG Bus communication loss36
Low power supply voltage37
Loss of ame signal38
Ignition failure. e boiler lights automatically
with each demand for ce nt ral heating or
domestic hot water. If it does not light within 10
seconds, the boiler remains in stand-by for 30
seconds, tries again and if the second attempt
fails it will go into 'ignition block' (ERR01). To
eliminate 'ignition block' the Reset button 'C'
must be pressed. e fault can be reset 5 times
consecutively, aer which the function disabled
for at least one hour. One attempt is allowed
every hour for a maximum of 5 attempts. By
switching the boiler on and o the 5 attempts
are re-acquired. On commissioning or after
extended inactivity it may be necessary to
eliminate the 'ignition fault'. If this phenomenon
occurs frequently, contact a qualied engineer
for assistance.
Safety thermostat fault (overheating). During
operation, if a fault causes excessive overheating
of the boiler, or a fault occurs in the ame control
section, an overheating fault is triggered in the
boiler (ERR02). To eliminate 'overheating fault'
the Reset button 'C' must be pressed. If this
phenomenon occurs frequently, call a qualied
engineer for assistance.
Flue safety thermostat fault. is occurs in
the case of partial internal obstruction (due to
the presence of lime scale) or external blockage
(combustion resi dues) to the combusti on
chamber. To eliminate the 'ue thermostat fault'
the Reset button 'C' must be pressed. Call a
qualied engineer to remove the obstructions.
Short circuit or bad connection. is occurs
in the case of faults to the safety thermostat
(overheating) or fault in the flame sensing
control. e boiler does not start and a qualied
engineer must be called.
Flow sensor fault. If the board detects a fault
with the system NTC ow sensor, the boiler will
not start. Call a qualied egineer for assistance.
Maximum number of resets reached. The
maximum number of 5 resets has been reached.
Refer to previos paragraph - Ignition failure.
Insucient system pressure. Low water pressure
inside the central heating system is detected and
prevents the boiler operating. Check the boiler
pressure gauge (item 1, Fig. 2-1) is between 1
and 1.2 bar. Restore to the correct pressure if
necessary and check for leaks.
Storage tank sensor fault. If the board detects
a fault with the storage tank sensor, the boiler
will not produce domestic hot water. A qualied
engineer must be called.
Conguration error. If the board detects a fault
in the electric wiring, the boiler will not start. If
normal conditions are restored the boiler restarts
without having to be reset. If the fault persists,
contact a qualied engineer for assistance.
Fan fault. is occurs if the fan has a mechanical
or electrical fault. To eliminate the 'fan fault'
the Reset button 'C' must be pressed. If the
fault persists, contact a qualied engineer for
assistance.
Flame sensing fault.is occurs in case of a
leak on the detection circuit or fault in the ame
control unit. e boiler can be reset in order
to allow a new ignition attempt. If the boiler
does not start, contact a qualied engineer for
assistance.
Return sensor fault. In this condition the boiler
does not correctly control the pump if set at
'Auto'. e boiler continues functioning but to
eliminate the fault, contact a qualied engineer
for assistance.
18Alpha Intec 50CS
Push button control panel fault. is occurs
when the circuit board detects a fault on the
push button control panel. If normal conditions
are restored the boiler restarts without having to
be reset. If this fault persists, contact a qualied
engineer for assistance.
Insucient circulation. is occurs if there
is overheating in the boiler due to insucient
water circulating in the primary circuit, the
causes can be:
- low system circulation - check that no shut-o
devices are closed on the heating circuit and
that the system is free of air (deaerated).
- circulating pump blocked - free the circulating
pump.
If this phenomenon occurs frequently, contact a
qualied engineer for assistance.
Loss of remote control communication. is
occurs in the case of connection to a remote
control that is not compatible. Try the connection
procedure again by turning the boiler o and
then back on again. If the Remote Control is
still not detected on re-starting the boiler will
switch to local operating mode, i.e. using the
controls on the boiler itself. In this case the boiler
cannot activate the 'Central heating' function.
To make the boiler function in 'Heating' mode,
activate the 'Emergency' function present inside
the 'Customisations' menu (Section 2.14, P33).
If this phenomenon occurs frequently, contact a
qualied engineer for assistance.
Low temperature zone 2 sensor fault. If the
board detects a fault with the low temperature
zone 2 sensor, the boiler will not function in
that zone. A qualied engineer must be called.
Low temperature zone 3 sensor fault. If the
board detects a fault with the low temperature
zone 3 sensor, the boiler will not function in
that zone. A qualied engineer must be called.
Low temperature zone 2 safety thermostat
operation. During operation, if a fault causes
excessive overheating of the low temperature
zone 2, the boiler will not satisfy the requests
of that zone. If normal conditions are restored
the boiler restarts without having to be reset. A
qualied engineer must be called.
Low temperature zone 3 safety thermostat
operation. During operation, if a fault causes
excessive overheating of the low temperature
zone 3, the boiler will not satisfy the requests
of that zone. If normal conditions are restored
the boiler restarts without having to be reset. A
qualied engineer must be called.
IMG Bus communication loss. If due to a fault
on the boiler control unit, communication is lost
between the control unit and the zone control
unit or on the IMG Bus, the boiler will not satisfy
central heating requests. A qualied engineer
must be called.
Low power supply voltage. is occurs when
the supply voltage is lower than the allowed
limits for the correct operation of the boiler.
If normal conditions are restored, the boiler
re-starts without having to be reset. If this
occurs frequently, contact a qualied engineer
for assistance.
Loss of ame signal. is occurs when the boiler
has lit correctly but the burner ame switches
o unexpectedly, a new attempt at ignition is
performed and if normal conditions are restored,
the boiler does not have to be reset (this fault can
be checked in the list of errors P19 present in the
'M1' menu in Section 2.14.). If this phenomenon
occurs frequently, contact a qualied engineer
for assistance.
2.7 BOILER SHUTDOWN.
Switch the boiler off by pressing the “
button, disconnect the isolation switch outside of
the boiler and close the gas cock upstream from
the appliance. Never leave the boiler switched on
if le unused for prolonged periods.
2.8 RESTORE THE SYSTEM PRESSURE.
Periodically check the system water pressure.
e boiler pressure gauge should read a pressure
between 1 and 1.2 bar.
If the pressure falls below 1 bar (with the system
cold) restore normal pressure via the system lling
valve located in the right side of the boiler and
accessible behind the bottom cover (Fig. 2-8).
Note: Ensure the valve is closed aer lling.
If pressure reaches 3 bar the safety valve may
be activated.
In this case contact a qualified engineer for
assistance.
In the event of frequent pressure drops, contact
a qualied engineer to check for possible system
leakage.
2.9 DRAIN THE SYSTEM.
To drain the boiler, use the central heating drain
tap (Fig. 2-8).
Before draining, ensure that the lling valve is
closed.
Hot water store drain tap
2.10 DRAIN THE HOT WATER SYSTEM.
To drain the domestic hot water system, use the
hot water store drain tap (Fig. 2-8).
Note: Before performing this operation close the
boiler cold water inlet valve and open a hot water
tap in order to allow the store to drain.
2.11 ANTIFREEZE PROTECTION.
e boiler controls include an anti-freeze mode
that activates the pump and burner when the
system water temperature in the boiler falls
”,
below 4°C.
e anti-freeze function is only guaranteed if:
- the boiler has a constant supply of gas and
electricity.
- the boiler is not in stand-by(
- the boiler ignition has not locked out.
- the boiler essential components are not faulty.
In the case of prolonged inactivity (second
home), we recommend that:
- the electricity supply is disconnected.
- the central heating and boiler domestic hot
water circuits are drained. In systems that
are drained frequently, lling must be carried
out with suitably treated water to eliminate
hardness that can cause lime-scale.
2.12 CASE CLEANING.
Use damp cloths and neutral detergent to clean
the boiler casing. Never use abrasive or powder
detergents.
2.13 DECOMMISSIONING.
In the event of permanent shutdown of the boiler,
contact a qualied engineer for the procedures
and ensure that the electrical, water and gas
supplies are shut o and disconnected.
).
INSTALLATIONUSERMAINTENANCE
Central heating drain tap
Fig. 2-8
19Alpha Intec 50CS
2.14 PARAMETERS AND INFORMATION
MENU REFER ALSO TO FIG. 21.
By pressing the button 'D' it is possible to access
a menu divided into three main parts:
- 'M1' - Information.
- 'M3' - Customisations.
- 'M5' - Congurations, menu reserved for the
engineer and for which a password is required.
Information Menu. is menu contains various information relative to the boiler operation:
P12View the total operating hours of the boiler
P13View the number of burner ignitions
P14
(with optional
external sensor
M1
D
C
present)
- - -
(without optional
external sensor)
P15
P17View the fan speed
P18e value displayed does not aect this model
P19
Turn the central heating temperature selector
switch (item 3) to scroll through the menu
items.
Press button 'D' to access the various levels of
the menu.
Press button 'C' to go back one level.
View the management soware version of the boiler P.C.B.
D
C
D
C
D
C
P14/AView the current external temperature (optional external sensor used)
P14/B
P14/C
RESET
select
xx = soware display version
yy = ignition control soware version (burner control)
zz = P.C.B. soware version
View the minimum external temperature recorded (optional external
sensor used)
View the maximum external temperature recorded (optional external
sensor used)
D
x
By pressing button 'D' the MIN and MAX temperatures measured are
zeroed
C
No display on this boiler model
View the last 5 events that caused a boiler shutdown. e sequential
number from 1 to 5 is indicated in the display (position 6) with the
relative error code in postion 7.
By pressing button 'D' repeatedly it is possible to view the operating
time and the number of ignitions at which the anomaly occurred
Customisation menu. is menu contains all
options that can be customised. (e rst item
of the various options that appears inside the
parameter is that selected by default).
Important: if the international language is to be
restored (A1), proceed as follows:
- press button 'D' to enter the configuration
menu.
- turn selector switch '3' to 'PERSONAL'.
- press button 'D' to conrm.
- turn selector switch '3' to 'DATI'.
AUTO
(Default)
ONe display is always lit up
OFF
P32/B
OFF
ON
D
x
select
C
D
C
D
x
select
C
ITALIANO
A1
(Default)
- press button 'D' to conrm.
- turn selector switch '3' to 'LINGUA'.
- press button 'D' to conrm.
- turn selector switch '3' to 'A1'.
- press button 'D' to conrm.
At this point the international items indicated in
the menu tables appear on the display.
e display lights up when the burner
is ignited and when the controls are
accessed, it remains on for 5 seconds aer
the last operation performed
e display only lights up when the
controls are accessed and remains on for 5
seconds aer the last operation performed
D
All descriptions are given in Italian
x
select
All descriptions are given in
alphanumerical format
C
In winter mode, by activating this
function it is possible to activate the
central heating function even if the
optional environmental thermostat (TA)
is out of service
By pressing button 'D' the customisations
made are zeroed, restoring the factory ser
values
20Alpha Intec 50CS
BOILER STARTUP
3
INITIAL CHECK.
To commission the boiler:
- ensure that the Benchmark information and
Checklist is completed.
- make sure that the type of gas used corresponds
to boiler settings.
- check connection to a 230V-50Hz power
supply, correct L-N polarity and the earthing
connection.
- make sure the central heating system is lled
with water, all radiators have been vented and
that the pressure gauge indicates a pressure of
1 to 1.2 bar.
3.1 HYDRAULIC DIAGRAM.
- check that the automatic air vent cap is open
and that the system is well deaerated.
- switch the boiler on and check correct ignition.
- check the burner pressure in domestic hot
water and central heating modes.
- check the CO
minimum ow rate.
- check activation of the safety device in the event
of no gas, as well as the relative activation time.
- check activation of the main switch located
upstream from the boiler and in the boiler.
- check that the ue is operating correctly.
in the ue at maximum and
2
- check that all control devices are working.
- check the production of domestic hot water.
- check the water circuits for leaks rectifying
where necessary.
- check ventilation and/or aeration of the
installation room where provided.
If any checks/inspection give negative results, do
not start the boiler.
After commi ssioning the boiler, ensure the
Benchmark Checkli st at the back od these
instructions is completed.
INSTALLATIONUSERMAINTENANCE
Domestic hot water
outlet
47
46
45
44
43
42
41
40
39
From
item
38
42
Primary heating
Cold mains water
inlet
24
23
22
21
return
20
Primary heating
flow
19
37
36
35
34
18
17
P
(P1) (P2)
Gas
16
152914
(P3)
Gas
13
12
11
10
9
8
7
6
5
4
3
1 - Condensate trap
2 - Air intake pipe
3 - Fan
4 - Burner injector
5 - Flame sensing electrode
6 - Burner
7 - Flue safety thermostat
8 - Heat exchanger
9 - Manual air vent
10 - Flue hood
11 - Gas valve outlet pressure point (P3)
12 - Gas valve
13 - Gas service cock
14 - Air sample point
15 - Flue sample point
16 - Venturi pressure points
33 - CH drain tap
34 - Venturi negative pressure point (P2)
35 - Gas manifold
36 - Ignition electrode
37 - Flow temperature sensor
38 - Tundish
39 - Hot water store drain tap
40 - DHW temperature sensor
41 - DHW expansion vessel
42 - DHW expansion relief valve
43 - Check valve
44 - Flow regulator
45 - Filter
46 - Pressure reducing valve
47 - DHW isolation valve
Fig. 3-1
3.2 WIRING DIAGRAM.
Flue safety
thermostat
Flame sensing
electrode
Fan
Gas valve
Boiler pumpSpark generator
Mains supply
230/240 V ~ 50 Hz
AUX
230/240 V ~ 50 Hz
Max. 2 A
Ignition electrodes
Filter
Pump relay board
Diverter valve
Display
System pump
DO NOT CONNECT 230/240V~50Hz
External
sensor
(optional)
Volt free room
thermostat
(optional)
Overheat
thermostats
System
pressure switch
DHW
sensor
PCB
Flow
sensor
CH ON
Fuse 3.15 AF
X11
X10
X1
X4
X9
X19
X18
LINK
X7
X2
X14X12
X8
X17
X3
X1
X1
X2
Transformer
X5X6
X16X15
IMG
BUS
C.A.R.
BUS
1 234
5 6
7
1 234
5
1234
56
7
NL
B
A
12
3
112
2
3
383940
4142
43
2144
1 234
5 678 9
10
11
1 2
3
4
5 6
7
R
R
R
Gy
GyG/y
G/y
Gy
R
R
R
RR
Bk
Bk
Bk
Bk
Bk
Bk
Bk
Bk
Bk
Bl
Bk
Bl
Bl
Bl
Bl
Bl
Bl
Bl
Br
Br
Br
Br
Br
Br
Bl
Gy
Gy
W
CH
DHW
W
W
W
W
W
W
Or
OrOr
P
P
G/Y
+UB
-UB
HS
GND
PWM
INSTALLATIONUSERMAINTENANCE
Colour Code
Br - Brown
Bk - Black
Bl - Blue
Room thermostat: To fit an external room
thermostat connect it to terminals 40 and 41,
removing the link rst.
R - Red
Or - Orange
G/Y - Green/Yellow
e connector X5 is used for the connection to
the relay board.
3.3 TROUBLESHOOTING.
Note: Maintenance must be carried out by a
qualied Engineer.
- Smell of gas. Caused by leakage from gas pipes.
Check pipework for soundness, rectifying
where necessary.
- Repeated ignition failure. No gas, check the
presence of pressure in the supply and that the
gas supply cock is open. Incorrect adjustment
of the gas valve, check the correct calibration
of the gas valve.
- Irregular combustion or noisiness. is may be
caused by: a dirty burner, incorrect combustion
parameters, flu e terminal not correct ly
installed. Clean the above components and
ensure correct installation of the terminal,
check correct setting of the gas valve (O-Set
setting) and correct percentage of CO2 in the
ue gas.
W - White
Gy - Grey
P - Pink
- Frequent operation of the overheat safety
thermostat. It can depend on the lack of water
in the boiler, poor water circulation in the
system or blocked pump. Check on the pressure
gauge that the system pressure is within
established limits. Check that the radiator
valves are not closed and also the operation of
the pump.
- Blocked condensate trap. is may be caused by
dirt or combustion products deposited inside.
Check, by means of the condensate drain cap,
that there are no residues of material blocking
the ow of condensate.
- Heat exchanger blocked. is may be caused by
the trap being blocked. Check, by means of the
condensate drain cap, that there are no residues
of material blocking the ow of condensate.
- Noise due to air in the system. Make sure the
cap on the automatic air vent has been opened
(item 6 Fig. 1-19). Make sure the system
pressure and expansion vessel factory set
pressure values are within the set limits; e
factory set pressure values of the expansion
vessel must be 1.0 bar, the value of system
pressure must be between 1 and 1.2 bar. Check
that system has been lled and vented correctly.
- Noise due to air inside the heat exchanger. Make
sure the heat exchanger has been vented correctly
(use the manual air vent, item 19 Fig. 1-19).
Ensure the air vent is closed aer use..
- Domestic hot water store temperature sensor
failure. e boiler or store do not have to be
drained in order to replace the DHW sensor,
as the sensor is not in direct contact with the
DHW present in the boiler.
3.4 CHIMNEY SWEEP FUNCTION.
When this function is activated the boiler
operates only by adjusting the central heating
selector switch (item 3, Fig. 2-1).
In this state all adjustments are excluded and only
the safety thermostat and the limit thermostat
remain active. To activate the chimney sweep
press the Reset button 'C' for a time between 8
and 15 seconds in absence of domestic hot water
and central heating requests. Its activation is
indicated by the relative symbol (item 22, Fig.
2-1). is function allows the engineer to check
the combustion parameters. Aer the checks,
deactivate the function by switching the boiler
o and on again using the Stand-by button
Fig. 3-2
.
22Alpha Intec 50CS
3.5 PUMP ANTISEIZE FUNCTION.
e boiler has a function that starts the pump at
least once every 24 hours for the duration of 30
seconds in order to reduce the risk of the pump
becoming blocked due to prolonged inactivity.
3.6 THREEWAY VALVE ANTISEIZE
FUNCTION.
Both in 'domestic hot water' and 'central heating'
modes the boiler has a function that starts the
three-way valve 24 hours after it was last in
operation, running it for a full cycle so as to
reduce the risk of the valve becoming blocked
due to prolonged inactivity.
3.7 RADIATOR ANTIFREEZE
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.8 P.C.B. PERIODIC SELFCHECK.
During operation in central heating mode
or with the boil er in stand-by mode, this
function activates every 18 hours aer the last
boiler check/power supply. When operating in
domestic hot water mode the self-check starts
within 10 minutes aer the end of the last hot
water draw-o, for approximately 10 seconds.
Note: During self-check, the boiler remains o.
3.9 AUTOMATIC VENT FUNCTION.
In the case of new central heating systems it
is very important that the system is vented
correctly. To activate the 'F8' function (Section
2.4), press buttons 'B and C' at the same time
(Fig. 2-1) for 5 seconds with boiler in stand-by.
e operation consists of cyclic operation of the
pump (100 sec ON, 20 sec OFF) and the 3-way
valve (120 sec domestic hot water, 120 sec central
heating). e operation ends aer 18 hours or
by switching the boiler on using the ignition
button
.
3.10 YEARLY APPLIANCE CHECK AND
MAINTENANCE.
e following checks and maintenance must be
performed at least once a year.
- The Benchmark Service Record must be
completed in order to preserve the boiler
warranty.
- Clean the ue side of the heat exchanger.
- Clean the main burner.
- Check correct ignition and operation.
- Check correct calibration of the burner in
domestic hot water and central heating modes.
- Check correct operation of the controls, in
particular:
- the operation of main electrical switch on the
boiler.
- system control thermostat operation.
- dome st ic hot water control thermostat
operation.
- Check the gas circuit for soundness.
- Check the operation of the flame sensing
control:
- check that the relative intervention time is
less than 10 seconds.
- Visually check for water leaks or oxidation
from/on connections and traces of condensate
residues inside the sealed chamber.
- Check, by means of the condensate drain cap,
that there are no residues of material blocking
the ow of condensate.
- Check contents of the condensate drain trap.
- Visually check that the water safety drain valve
is not blocked.
- Check that, aer discharging system pressure
and bringing it to zero (read on boiler pressure
gauge), the expans ion vessel factor y-set
pressure is 1.0 bar (primary CH vessel).
- Check that the domestic hot water expansion
vessel load is at a pressure between 3 and 3.5
bar.
- Check that the system static pressure (aer
refilling the system and when it is cold) is
between 1 and 1.2 bar.
- Visually check that the safety and control
devices have not been tampered with and/or
shorted, in particular:
- temperature safety thermostat.
- system pressure switch.
- Check the condition and integrity of the
electrical system and in particular:
- electrical power cables must be inside the
sleeving.
- there must be no traces of blackening or
burning.
Note: When carrying out maintenance on the
boiler, also check the central heating system to
ensure it is functioning correctly and free of leaks.
INSTALLATIONUSERMAINTENANCE
23Alpha Intec 50CS
INSTALLATIONUSERMAINTENANCE
B
B
A
4
3
4
3
3.11 CASING REMOVAL.
For ease of boiler maintenance the casing can be
completely removed as follows.
•Openthecontrolpanel(item1,Fig.3-3).
- Press the centre of the control panel cover (2)
to open it and lower the panel. Carefully remove the rubber bump stops (3)
and loosen the two screws (4).
- Step A. Li the control panel up, gripping it
at the sides, to disengage it from the locking
pin (5).
- Step B. Pull the control panel forwards
slightly.
- Step C. Hinge open the panel as shown in Fig.
3-3.
•Removethelowerpanel(item6,Fig.3-4).
- Step D. Press down on the two catches (7)
- Step E. Hinge the cover forwards on the two
screws (8) and li it o the screws.
•Removetheremaingcasepanels(Fig.3-5).
- Top cover (item 9, Fig. 3-5). Remove the two
screws (10), pull the cover forwards slightly
to disengage the xings (see view A) and li
it o.
- Rear top cover (item 11, Fig. 3-5). Remove
the two screws (12) and li o the cover.
- Front panel (item 13, Fig. 3-5). Remove the
two screws (14), li up the cover slightly to
disengage the xings (see view B) then pull
it forwards o the side panels.
- Side panels (item 16, Fig. 3-5). Remove the
upper and lower screws (15) then slide the
panel forwards to disengage it from the rear
xings (see view C).
2
1
A
C
1
5
Fig. 3-3
E
D
8
7
8
6
7
Fig. 3-4
24Alpha Intec 50CS
10
12
9
11
View A
INSTALLATIONUSERMAINTENANCE
14
16
13
14
15
View B
15
15
View C
16
Fig. 3-5
3.12 COMBUSTION SETTINGS.
Natural GasPropane
Supply pressurembar2037
Burner nozzlemmN/A6.00
Flue ow rate at max heat outputkg/h5253
Flue ow rate at min heat outputkg/h1212
CO
at Q. Nom./Min.%9.40 / 8.9010.50 / 10.30
2
CO at 0% di O
NOX at 0% of O2 at Nom.Q./Min.ppm83 / 4399 / 54
Flue temperature at nominal output°C7374
Flue temperature at minimum output°C6466
Gas rate at maximum heat outputm³/h3.49N/A
Gas rate at maximum heat outputkg/hN/A2.57
at Q. Nom./Min.ppm206 / 9190 / 8
2
25Alpha Intec 50CS
3.13 TECHNICAL DATA.
Maximum heat inputkW33.0
Minimum heat inputkW7.3
Maximum heat output (useful)kW32.0
Minimum heat output (useful)kW6.9
Eciency 80/60 Nom./Min.%96.9 / 94.5
Eciency 50/30 Nom./Min.%104.7 / 105.8
Eciency 40/30 Nom./Min.%107.3 / 107.3
Heat loss at casing with burner O/On (80-60°C)%0.80 / 0.20
INSTALLATIONUSERMAINTENANCE
Heat loss at ue with burner O/On (80-60°C)%0.02 / 2.90
Central heating circuit max. operating pressurebar3
Central heating circuit max. operating temperature°C90
Max. adjustable central heating temperature°C25 - 85
Min. adjustable central heating temperature°C25 - 50
System expansion vessel total volumel11.7
System expansion vessel factory-set pressurebar1.0
Domestic hot water expansion vessel total volumel3.0
Domestic hot water expansion vessel factory-/set pressurebar2.5
Water content in generatorl4.0
Total head available with 1000 l/hm H
O3.61
2
Hot water production useful heat outputkW32.0
Domestic hot water adjustable temperature°C20 - 60
Domestic hot water circuit ow limiter at 2 barl/min12.6
Min. pressure domestic hot water circuitbar0.3
Max. pressure domestic hot water circuitbar8.0
*Flow rate 'D' according to EN 625l/min19.5
Continuous draw capacity (∆T 30°C)l/min15.8
Domestic hot water performance classication according to EN 13203-1
Weight of full boilerkg147.7
Weight of empty boilerkg90.1
Power supply connectionV/Hz230/50
Power inputA0.85
Installed electric powerW165
Pump consumptionW34
Fan consumptionW26.4
Equipment electrical system protection-IPX5D
Flue gas max. temperature°C75
class-5
NO
X
Weighted NO
X
mg/kWh52
Weighted COmg/kWh17
Type of appliance
C13 / C33 / C43 / C53 / C83 /
C93 / B33 / B53p
CategoryII2H3B/P
- Flue temperature values refer to an air inlet
temperature of 15°C and ow temperature of
50°C.
- The dat a relevant to domestic hot water
performance refer to a dynamic inlet pressure
of 2 bar and an inlet temperature of 15°C, the
values are measured directly at the boiler outlet
to obtain the data declared mixing with cold
water may be necessary.
- * Specific capacity 'D': domestic hot water
ow rate corresponding to an average increase
of 30K, which the boiler can supply in two
successive withdrawals.
To achieve these higher ow rates the ow
restrictor must be removed from the cold inlet
connection. See Section 1.15 item 35.
This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating
compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.
Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.
Customer Name
Address
Boiler Make and Model
Boiler Serial Number
Commissioned by (print name)
Company NameTelephone Number
Company Address
INSTALLATIONUSERMAINTENANCE
To be completed by the customer on receipt of a Building Regulations Compliance Certificate
Building Regulations Notification Number (if applicable)
CONTROLS Tick the appropriate boxes
Time and Temperature Control to HeatingRoom Thermostat andProgrammableLoad/WeatherOptimum Start
If required by the manufacturer, record the following
The manufactur
Commissioning Engineer’s Signature
Customer’s Signature
(To confirm satisfactory demonstration and receipt of manufacturer’s literature)
All installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme.
*
A Building Regulations Compliance Certificate will then be issued to the customer.
It is recommended that your heating system is serviced regularly and that the appropriate Service Record is completed.
Service Provider
Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s
instructions.
Always use the manufacturer’s specified spare part when replacing controls.
SERVICE 1
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Gas Safe Register licence No.Gas Safe Register licence No.
Comments
Signature
SERVICE 3
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Gas Safe Register licence No.Gas Safe Register licence No.
Comments
Signature
SERVICE 5 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Gas Safe Register licence No.Gas Safe Register licence No.
Comments
Date
Date
YesNo
YesNo
YesNo
SERVICE 2
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Comments
Signature
SERVICE 4
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Comments
Signature
SERVICE 6 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Comments
Date
Date
YesNo
YesNo
YesNo
Signature
SERVICE 7 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Gas Safe Register licence No.Gas Safe Register licence No.
Comments
Signature
YesNo
SERVICE 9 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Gas Safe Register licence No.Gas Safe Register licence No.
Comments
Signature
YesNo
Signature
SERVICE 8 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Comments
Signature
SERVICE 10 Date
Energy Efficiency Checklist completed?
Engineer Name
Company Name
Telephone Number
Comments
Signature
29Alpha Intec 50CS
YesNo
YesNo
30Alpha Intec 50CS
31Alpha Intec 50CS
During the useful life of the unit, the performance is aected by external
factors, such as the hardness of tap water, weathering, deposits in the
ue and so on. e data given refers only to new units correctly installed
and used in accordance with the instructions.
Note: It is recommended that the boiler is serviced annually.
www.alpha-innovation.co.uk
For Technical help or for Service call the
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