alpha InTec 50CS User guide

Installation, User and

Servicing Instructions

InTec 50CS

Floor standing, high output,

condensing boiler

Leave these instructions with the User

BENCHMARK SCHEME

To comply with Building Regulations Part L1 (Part 6 in Scotland) the boiler should be installed in accordance with the
manufacturer’s instructions. Self-certication 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 qualied 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 notiable work be a member of a

Competent Persons Scheme or conrm that the customer has notied 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 identied 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 conrm 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 eciency 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.

e Benchmark Scheme is managed and promoted by:

Heating and Hotwater Industry Council (HHIC)

Camden House, Warwick Rd
Kenilworth
CV8 1TH

Telephone: [phone]
E-mail: [e-mail]
Website: www.hhic.org.uk

Useful contact details; Gas Safe Register - 0800 408 5577 - www.gassaferegister.co.uk

Alpha Heating Innovation;

General Sales Enquiries - 0844 871 8760
Technical Helpline - 0844 871 8764

2Alpha Intec 50CS

CONTENTS

USER pageINSTALLATOR page MAINTENANCE page

1 Boiler installation. ................................................3

1.1 Introduction. ........................................................3

1.2 Dimensions. ..........................................................4

1.3 Connections. ........................................................................4

1.4 Remote controls and programmable room

thermostats (optional).........................................5

1.5 External temperature sensor (optional). ...........5

1.6 Fit the ue. ............................................................6

1.7 Reduce the ue. ....................................................7

1.8 Extend the ue .....................................................8

1.9 Plume management components (optional). ...9

1.10 Vertical ue options. ..........................................11

1.11 Disposal of condensate. .....................................11

1.12 Flush the system. ...............................................12

1.13 Fill the system. ....................................................12

1.14 Circulation pump. ..............................................13

1.15 Boiler components. ............................................15

2 User and maintenance instructions. ................16

2.1 Servicing. ............................................................16

2.2 General warnings. ..............................................16

2.3 Control panel. .....................................................16

2.4 Operating modes. ..............................................17

2.5 Using the boiler. .................................................17

2.6 Fault signals. .......................................................18

2.7 Boiler shutdown. ................................................19

2.8 Restore the system pressure. .............................19

2.9 Drain the system. ...............................................19

2.10 Drain the hot water system. ..............................19

2.11 Anti-freeze protection. ......................................19

2.12 Case cleaning. .....................................................19

2.13 Decommissioning. .............................................19

2.14 Parameters and information menu. ................20

3 Boiler start-up (initial check). ..........................21

3.1 Hydraulic diagram. ............................................21

3.2 Wiring diagram. .................................................22

3.3 Troubleshooting. ................................................22

3.4 “Chimney sweep function”. ...............................22

3.5 Pump anti-seize function. .................................23

3.6 ree-way anti-seize function. .........................23

3.7 Radiator anti-freeze function. ..........................23

3.8 P.C.B. periodic self-check. ................................23

3.9 Automatic vent function. ..................................23

3.10 Yearly appliance check and maintenance. ......23

3.11 Casing removal. ..................................................24

3.12 Combustion settings. .........................................25

3.13 Technical data. ....................................................26

3.14 Short parts list ....................................................27

Benchmark checklist .........................................28

Service record .....................................................29

1 BOILER INSTALLATION

1.1 INTRODUCTION.

e Alpha InTec 50CS is a oor standing, high eciency, 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 notied 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 aer 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 Notication 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 Oce code of practice for the storage of liqueed 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

3 Alpha 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)

850 650 600

Connections

Gas Domestic hot water Central heating

A B C E F

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
specications).

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 ecient earthing system as specied 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. 1-3 Fig. 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

5 Alpha Intec 50CS

openings of the

1.6 FIT THE FLUE  FIGS. 5 AND 16

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. 110

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

7 Alpha Intec 50CS

1.8 EXTENDING THE FLUE  FIG. 111

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 aer 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

9 Alpha 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 m Hmax = 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

11 Alpha 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: [phone]) or Sentinel (Tel: [phone]

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 Rell 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 Rell 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 Rell 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 Rell 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 liing 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. 118.

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 aer

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.

Programme LED colour

P (ΔP-V) green

C3 (ΔP-C) - H=3 m white

C4 (ΔP-C) - H=4 m orange

Min - Max blue

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

13 Alpha 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

200 400 600 800 1000 1200 1400 1600 1800 2000

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

200 400 600 800 1000 1200 1400 1600 1800 2000

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

33 34

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

15 Alpha Intec 50CS

USER INSTRUCTIONS.

2

2.1 SERVICING.

Imp ortant: the boil er requires perio dical

maintenance and regular checks of energy
eciency 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 qualied technician
checks eciency 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 qualied 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 conrmation (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

10 11 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 conrmation or

menu access
20 and 7 - External temperature display

with external probe connected

(optional)
21 - Display of reset or exit menu

3

request
22 - Chimney sweep function

in progress
23 - Boiler pressure gauge
24 - Multi-function display

22

16

2

5

17

18

4

21

7

19

9

Fig. 2-1

6

20

16Alpha Intec 50CS

2.4 OPERATING MODES.

Below is a list of boiler operating modes

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), aer which the boiler goes back to the normal operation,
previously set.

Post ventilation in progress.

F4

Fan in function aer a request for domestic hot water or central heating in order to
evacuate residual fumes.

Post circulation in progress.

F5

Pump operating aer 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 sucient
to heat the radiators, the burner will shut o
and only the pump will operate.

INSTALLATIONUSERMAINTENANCE

17 Alpha 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 Oset 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 aer a
few seconds from the modication 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 sucient 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 aer 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 failure 01

Safety thermostat fault
(overheating), ame control fault

02

Flue safety thermostat fault 03

Short circuit or bad connection 04

Flow sensor fault 05

Maximum number of resets reached 08

Insucient system pressure 10

Storage tank sensor fault 12

Conguration error 15

Fan fault 16

Flame sensing fault 20

Return sensor fault 23

Push button control panel fault 24

Insucient circulation 27

Loss of remote control
communication

31

Low temperature zone 2 sensor fault 32

Low temperature zone 3 sensor fault 33

Low temperature zone 2 safety
thermostat operation
Low temperature zone 3 safety
thermostat operation

34

35

IMG Bus communication loss 36

Low power supply voltage 37

Loss of ame signal 38

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, aer 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 qualied 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 qualied
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
qualied 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 qualied
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 qualied egineer for assistance.

Maximum number of resets reached. The
maximum number of 5 resets has been reached.
Refer to previos paragraph - Ignition failure.

Insucient 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 qualied
engineer must be called.

Conguration 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 qualied 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 qualied 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 qualied 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 qualied 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 qualied
engineer for assistance.

Insucient circulation. is occurs if there
is overheating in the boiler due to insucient
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
qualied 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
qualied 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 qualied 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 qualied 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
qualied 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
qualied 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 qualied 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 qualied 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 qualied 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 aer 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 qualied 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 ANTIFREEZE 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 qualied 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

19 Alpha Intec 50CS

2.14 PARAMETERS AND INFORMATION
MENU REFER ALSO TO FIG. 21.

By pressing the button 'D' it is possible to access
a menu divided into three main parts:

- 'M1' - Information.

- 'M3' - Customisations.

- 'M5' - Congurations, menu reserved for the

engineer and for which a password is required.

Information Menu. is menu contains various information relative to the boiler operation:

INSTALLATIONUSERMAINTENANCE

Level 1 Button Level 2 Button Level 3 Button Description

P11

P12 View the total operating hours of the boiler
P13 View the number of burner ignitions

P14

(with optional

external sensor

M1

D 

 C

present)

- - -

(without optional

external sensor)

P15
P17 View the fan speed
P18 e value displayed does not aect 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 soware version of the boiler P.C.B.

D 

 C

D 

 C

D 

 C

P14/A View the current external temperature (optional external sensor used)

P14/B

P14/C

RESET

select

xx = soware display version
yy = ignition control soware version (burner control)
zz = P.C.B. soware 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).

Level 1 Button Level 2 Button Level 3 Button Level 4 Button Description

P31

D 

M3

 C

P33

RESET

D 

 C

D 

 C

D

x

select

 C

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 conrm.

- turn selector switch '3' to 'DATI'.

AUTO

(Default)

ON e 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 conrm.

- turn selector switch '3' to 'LINGUA'.

- press button 'D' to conrm.

- turn selector switch '3' to 'A1'.

- press button 'D' to conrm.
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 aer
the last operation performed

e display only lights up when the
controls are accessed and remains on for 5
seconds aer 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 STARTUP

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 27

32 26

31 25

30

17 - Overheat thermostats
18 - System pump
19 - CH isolation valves
20 - Automatic air vent
21 - Hydraulic manifold
22 - Manifold drain tap
23 - Filling loop
24 - Check valve
25 - Venturi

26 - Positive pressure point (P1)
27 - CH expansion vessel
28 - CH pressure relief valve
29 - Diverter valve
30 - Pressure switch
31 - Boiler pump
32 - Automatic air vent

28

21 Alpha Intec 50CS

2

Condensate

1

discharge

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 pump Spark 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

X14 X12

X8

X17

X3

X1

X1

X2

Transformer

X5 X6

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

41 42

43

2144

1 234

5 678 9

10

11

1 2

3
4
5 6

7

R

R

R

Gy

Gy G/y

G/y

Gy

R

R

R

R R

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

Or Or

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

qualied 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 aer 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. Aer 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 ANTISEIZE 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 THREEWAY VALVE ANTISEIZE
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 ANTIFREEZE
FUNCTION.

If the system return water is below 4°C, the boiler
starts up until reaching 42°C.

3.8 P.C.B. PERIODIC SELFCHECK.

During operation in central heating mode
or with the boil er in stand-by mode, this
function activates every 18 hours aer the last
boiler check/power supply. When operating in
domestic hot water mode the self-check starts
within 10 minutes aer 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 aer 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, aer 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 (aer

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

23 Alpha 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.

•Openthecontrolpanel(item1,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.

•Removethelowerpanel(item6,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.

•Removetheremaingcasepanels(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 Gas Propane

Supply pressure mbar 20 37
Burner nozzle mm N/A 6.00
Flue ow rate at max heat output kg/h 52 53
Flue ow rate at min heat output kg/h 12 12
CO

at Q. Nom./Min. % 9.40 / 8.90 10.50 / 10.30

2

CO at 0% di O
NOX at 0% of O2 at Nom.Q./Min. ppm 83 / 43 99 / 54
Flue temperature at nominal output °C 73 74
Flue temperature at minimum output °C 64 66
Gas rate at maximum heat output m³/h 3.49 N/A
Gas rate at maximum heat output kg/h N/A 2.57

at Q. Nom./Min. ppm 206 / 9 190 / 8

2

25 Alpha Intec 50CS

3.13 TECHNICAL DATA.

Maximum heat input kW 33.0

Minimum heat input kW 7.3

Maximum heat output (useful) kW 32.0

Minimum heat output (useful) kW 6.9

Eciency 80/60 Nom./Min. % 96.9 / 94.5

Eciency 50/30 Nom./Min. % 104.7 / 105.8

Eciency 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 pressure bar 3

Central heating circuit max. operating temperature °C 90

Max. adjustable central heating temperature °C 25 - 85

Min. adjustable central heating temperature °C 25 - 50

System expansion vessel total volume l 11.7

System expansion vessel factory-set pressure bar 1.0

Domestic hot water expansion vessel total volume l 3.0

Domestic hot water expansion vessel factory-/set pressure bar 2.5

Water content in generator l 4.0

Total head available with 1000 l/h m H

O 3.61

2

Hot water production useful heat output kW 32.0

Domestic hot water adjustable temperature °C 20 - 60

Domestic hot water circuit ow limiter at 2 bar l/min 12.6

Min. pressure domestic hot water circuit bar 0.3

Max. pressure domestic hot water circuit bar 8.0

*Flow rate 'D' according to EN 625 l/min 19.5

Continuous draw capacity (∆T 30°C) l/min 15.8

Domestic hot water performance classication according to EN 13203-1



Weight of full boiler kg 147.7

Weight of empty boiler kg 90.1

Power supply connection V/Hz 230/50

Power input A 0.85

Installed electric power W 165

Pump consumption W 34

Fan consumption W 26.4

Equipment electrical system protection - IPX5D

Flue gas max. temperature °C 75

class - 5

NO

X

Weighted NO

X

mg/kWh 52

Weighted CO mg/kWh 17

Type of appliance

C13 / C33 / C43 / C53 / C83 /

C93 / B33 / B53p

Category II2H3B/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.

26Alpha Intec 50CS

3.14 SHORT PARTS LIST.

Description Alpha Part No.

Hydraulic assembly ........................................................................................3.020477

DHW cylinder (complete assembly) ...........................................................3.023189

Circulating pump 15 - 60 - 130 .....................................................................1.032756

Bottom front case panel .................................................................................2.013823

Control panel door assembly ........................................................................ 3.017249

Display board ..................................................................................................1.032461

Burner manifold ............................................................................................. 1.025506

Pump assembly (head and housing) ............................................................ 3.020069

CH expansion vessel (12 litre) ......................................................................1.027232

Flue thermostat (110 °C) ................................................................................1.025798

3-way valve complete cartridge ..................................................................... 3.013730

Drain tting with hose union ........................................................................ 1.4275

Pressure sampling point cap ..........................................................................1.025690

Heating manifold drain tap ........................................................................... 1.0113

Front case panel ............................................................................................... 2.013824

DHW expansion vessel (3 litre) .....................................................................1.033497

Safety valve - DHW (6 bar) ........................................................................... 1.018091

D.15 pipe - safety valve outlet .......................................................................1.033560

Automatic air vent valve + 'O' ring ..............................................................1.017113

D.15 pipe - heating system safety valve .......................................................1.033634

Burner .............................................................................................................. 1.019622

NTC fast immersion probe ...........................................................................1.021762

Flue hood assembly ........................................................................................ 3.020662

Condensation module ...................................................................................1.024965

Bottom frame assembly .................................................................................3.019766

Cylinder top plug ............................................................................................1.1122

Cylinder tank gasket ......................................................................................1.7199

Relay PCB ........................................................................................................1.027418

Control panel knob ....................................................................................... 1.022370

Pressure gauge .................................................................................................1.032278

Hot water outlet cylinder tting ...................................................................1.5370

PCB ...................................................................................................................1.028532

Pressure switch ...............................................................................................1.025006

Gas valve ..........................................................................................................1.031823

Lehand case panel ........................................................................................2.013822

Plug for ange with sample points ...............................................................1.025278

Drain tting .....................................................................................................3.023191

Safety valve - CH (3 bar) ...............................................................................1.033574

Automatic air vent .......................................................................................... 1.2295

Flow regulator (pink - 14 litres) ....................................................................1.032198

Righthand case panel ..................................................................................... 2.013821

Top case panel (front) ....................................................................................2.015009

Top case panel (rear) ...................................................................................... 2.014920

Fan ....................................................................................................................1.029719

Diverter valve motor ...................................................................................... 1.018064

Sealed chamber cover with window ............................................................3.019767

Venturi .............................................................................................................1.024392

Spark generator ...............................................................................................1.025360

Ignition electrode assembly ...........................................................................3.017477

Flame sensing electrode .................................................................................1.028890

Overheat thermostat (100°C) .......................................................................1.025797

Condensate drain pipe ................................................................................... 1.027265

Condensate trap ..............................................................................................3.020486

Complete connection kit ...............................................................................3.023368

INSTALLATIONUSERMAINTENANCE

27 Alpha Intec 50CS

GAS BOILER SYSTEM COMMISSIONING CHECKLIST

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 Name Telephone 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 Heating Room Thermostat and Programmable Load/Weather Optimum Start

remiT/remmargorP Room Thermostat Compensation Control

Telephone Number

Gas Safe Register licence No.

Commissioning Date

:

*

remiT/remmargorPdnatatsomrehTrednilyCretaWtoHotlortnoCerutarepmeTdnaemiT Combination

dettiFsevlaVenoZgnitaeH Not Required

dettiFsevlaVenoZretaWtoH Not Required

dettiFsevlaVrotaidaRcitatsomrehT

dettiFmetsySotssapyBcitamotuA Not Required

Boiler

Not Required

dedivorPkcolretnIrelioB

ALL SYSTEMS

The system has been flushed and cleaned in accordance with BS7593 and boiler manufacturer’s instructions

What system cleaner was used?

What inhibitor was used? Quantity litres

CENTRAL HEATING MODE

Gas Rate

Central Heating Flow Temperature °C

Central Heating Return Temperature °C

Measure and Record:

)elbacilppafi(erusserPgnitarepOrenruB

3

m

/hr OR

mbar OR Gas Inlet Pressure mbar

seY

3

ft

COMBINATION BOILERS ONLY

Is the installation in a hard water area (above 200ppm)?

If yes, has a water scale reducer been fitted? Yes No

What type of scale reducer has been fitted?

DOMESTIC HOT WATER MODE Measure and Record:

etaRsaG

erutarepmeTtelnIretaWdloC °C

Hot water has been checked at all outlets Yes Temperature °C

etaRwolFretaW l/min

3

ROrh/

m

Yes No

)etarmumixamta(erusserPtelnIsaGROrabm)etarmumixamta(erusserPgnitarepOrenruB

3

ft

mbar

CONDENSING BOILERS ONLY

8976SB/6455SBro/dnasnoitcurtsnis’rerutcafunamehthtiwecnadroccanidellatsnineebsahniardetasnednocehT

seY

/hr

/hr

INSTALLATIONS

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.

©Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk

er’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes

CO

2

% OR CO ppm OR CO/CO

Ratio

2

seYsnoitalugeRgnidliuBetairporppaehthtiwseilpmocmetsysretawtohdnagnitaehehT

seYsnoitcurtsnis’rerutcafunamehthtiwecnadroccanidenoissimmocdnadellatsnineebevahstcudorpdetaicossadnareliobehT

seYremotsucehtybdootsrednudnaotdetartsnomedneebevahslortnocmetsysdnareliobehtfonoitarepoehT

28Alpha Intec 50CS

SERVICE RECORD

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

Yes No

Yes No

Yes No

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

Yes No

Yes No

Yes No

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

Yes No

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

Yes No

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

29 Alpha Intec 50CS

Yes No

Yes No

30Alpha Intec 50CS

31 Alpha Intec 50CS

During the useful life of the unit, the performance is aected 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
Alpha Helpline or use the following e-mail:

[e-mail]
Alpha Helpline 0844 871 8764

Alpha erm Limited
Nepicar House, London Road,
Wrotham Heath, Sevenoaks, Kent
TN15 7RS

ese instructions have been carefully prepared but we reserve the right to alter the
specication at any time in the interest of product improvement.
© Alpha erm Limited 2013.

Part No. 1.034294 rev. 15.039381/000

03/2013 D323