Unical Lattner ALKON 50, ALKON 70, Lattner ALKON 70 Installation And Servicing Manual

00333990 - 1st edition - 05/12

ALKON 70

ALKON 50

INSTALLATION AND
SERVICING MANUAL

Notice:

- This manual is avaible in the English and French
language

- In the Commonwealth of Massachusetts this boiler must
be installed by a licensed Plumber or Gas Fitter.

Condensing gas boiler

®

LATTNER

2

CONTENTS

1 GENERAL INFORMATION ................................................................................................................................................................................ 3

1.1 Symbols used in this guide .......................................................................................................................................................................... 3

1.2 Correct use of the appliance ....................................................................................................................................................................... 3

1.3 Water treatment ............................................................................................................................................................................................ 3

1.4 Information to be passed over to the person in charge of the appliance ................................................................................................. 4

1.5 Safety warnings ............................................................................................................................................................................................ 4

1.6 Data badge .................................................................................................................................................................................................... 5

1.7 The following instruction............................................................................................................................................................................... 6

1.8 Tools, materials and additional equipment .................................................................................................................................................. 7

1.9 Disposal ........................................................................................................................................................................................................ 7

1.10General warnings ......................................................................................................................................................................................... 7

2 TECHNICAL FEATURES AND DIMENSIONS................................................................................................................................................. 8

2.1 Technical features ........................................................................................................................................................................................ 8

2.2 Dimensions ................................................................................................................................................................................................... 8

2.3 Main components ......................................................................................................................................................................................... 9

2.4 Boiler water circuit diagram ....................................................................................................................................................................... 11

2.5 Performance data ....................................................................................................................................................................................... 12

3 INSTRUCTIONS FOR THE INSTALLER........................................................................................................................................................ 13

3.1 General warnings ...................................................................................................................................................................................... 13

3.2 Code and standard approvals .................................................................................................................................................................. 14

3.3 Packaging .................................................................................................................................................................................................. 14

3.4 Minimum clearance ................................................................................................................................................................................... 15

3.5 Boiler location in a boiler house ................................................................................................................................................................ 16

3.6 Connections............................................................................................................................................................................................... 17

3.7 Installation on existing heating systems .................................................................................................................................................. 17

3.8 Gas connection ......................................................................................................................................................................................... 19

3.9 Connection return and flow system pipes ............................................................................................................................................... 20

3.10 Determination of primary boiler pump or boiler pump system.......................................................................................................... 21

3.11 Pressure relief valve drain pipe ................................................................................................................................................................ 22

3.12 Working pressure...................................................................................................................................................................................... 22

3.13 Connecting the expansion vessel in a single boiler system .................................................................................................................. 22

3.14 Underfloor Heating system....................................................................................................................................................................... 23

3.15 Condensing drain ...................................................................................................................................................................................... 23

3.16 Water treatment ......................................................................................................................................................................................... 24

3.17 Combustion air and ventilation openings ................................................................................................................................................. 25

3.18 Installation of the exhaust and air intake system .................................................................................................................................... 26

3.18 Flue outlet installation ................................................................................................................................................................................ 25

3.19 Room air system for installation using indorr combustion air ................................................................................................................ 26

3.20 Vent and air supply system for orizontal direct vent system ................................................................................................................. 29

3.21 Electrical connection ................................................................................................................................................................................. 30

Regulation in force .................................................................................................................................................................................... 30

Mains electrical connection 120V - 60 Hz ............................................................................................................................................... 30

Room thermostat and / or E8 heating controller connection .................................................................................................................. 31

Connection of the additional safety device.............................................................................................................................................. 31

3.22 Wiring diagrams ........................................................................................................................................................................................ 32

3.23 Ladder diagrams ....................................................................................................................................................................................... 34

3.24 Starting up .................................................................................................................................................................................................. 35

3.25 Filling the system ...................................................................................................................................................................................... 35

3.26 Initial lighting ............................................................................................................................................................................................... 36

Preliminary checks ................................................................................................................................................................................... 36

Ignition and switching off........................................................................................................................................................................... 36

Information to be supplied to the user ..................................................................................................................................................... 36

3.27 Testing ignition safety shut off device ...................................................................................................................................................... 38

3.28 Burner adjustment ..................................................................................................................................................................................... 39

3.29 Programming of the operational parameters ........................................................................................................................................... 41

3.30 Variation of input range for high altitude ................................................................................................................................................... 42

4 SERVICING SCHEDULE .................................................................................................................................................................................. 43

4.1 Instructions for inspection and servicing.................................................................................................................................................. 43

Table of the resistance values in function of the heating and domestic sensor temperature ................................................................. 43

4.2 Periodic examination of venting system ................................................................................................................................................... 44

4.3 Proper procedure for cleaning flue gas .................................................................................................................................................... 44

4.4 Proper procedure for cleaning the burner ................................................................................................................................................ 44

4.5 Visual inspection of the flame .................................................................................................................................................................... 45

4.6 Proper reassembly and resealing of the air intake system .................................................................................................................... 45

4.7 Verification and cleaning of the condensate evacuation siphon.............................................................................................................. 46

4.8 Sealing gasket between distributor and boiler body ................................................................................................................................46

5 FAULT FINDING ................................................................................................................................................................................................ 47

5.1 Error codes ................................................................................................................................................................................................ 47

5.2 Request of maintenance ........................................................................................................................................................................... 48

SPARE PARTS .................................................................................................................................................................................................. 49

Warning: this manual contains instructions to be used exclusively by the installer and/or a competent person
in accordance with the current laws in force.
The end user MUST not make any alterations to the boiler.
Failure to follow the instructions indicated in this manual, which is supplied with the boiler, could cause injury
to persons, animals or damage to property. LATTNER shall not be held liable for any injury and/or damage.

This unit is ready for operation with gas A (natural), you can make the transformation to work

with gas E and (propane HD) using proper kit provided by LATTNER

Warning:

Any operation on the unit must be performed by authorized personnel.

3

General Information

1.1 -SYMBOLS USED IN THIS GUIDE

When reading this guide particular care has to be given to the parts marked with the followings symbols:

1.2 - CORRECT USE OF THE APPLIANCE

The ALKON appliance has been designed utilizing today’s heating technology and in compliance with the
current safety regulations.However, following an improper use, dangers could arise for the safety and life
of the user or of other people, or damage could be caused to the appliance or other objects.The appliance
is designed to be used in pumped hot water central heating systems. Any other use of this appliance will be

considered improper. LATTNER declines any responsibility for any damages or injuries caused by an
improper use; in this case the risk is completely at the user’s responsibility .In order to use the appliance
according to the scopes it was designed for it is essential to carefully follow the instructions indicated in
this guide.

1.3 - WATER TREATMENT

• The hardness of the mains water supply conditions the frequency with which the heat exchanger is cleaned.

• In hard water areas where the main water can exceed 15°f total hardness, a scale reducing device is
recommended. The choice of this device has to be made taking into consideration the characteristics of the
water.

• In order to improve the resistance to lime scale it is recommended to adjust the domestic hot water temperature

as near as possible to the one you really require.

• We recommend you to check the state of cleanliness of the domestic hot water heat exchanger at the end of
the first year and subsequently, on the basis of the lime scale found, this period can be extended to two years.

1

GENERAL INFORMATION

CAUTION

INDICATES A POTENTIAL HAZAR­DOUS SITUATION, WHICH IF NOT
AVOIDED, MAY RESULT IN MINOR
OR MODERATE INJURY.

WARNING

INDICATES A POTENTIALLY HAZAR­DOUS SITUATION, WHICH IF NOT AVO­IDED, COULD RESULT IN DEATH OR
SERIOUS INJURY.

DANGER

INDICATES AN IMMINENTLY HAZAR­DOUS SITUATION, WHICH IF NOT
AVOIDED, WILL RESULT IN DEATH
OR SERIOUS INJURY.

NOTICE

INDICATES SPECIAL ISTRUCTIONS ON
INSTALLATION, OPERATION OR
MAINTENANCE THAT ARE IMPORTANT
BUT NOT RELATED TO PERSONAL
INJURY OR PROPERTY DAMAGE.

CAUTION

RISK OF ELECTRIC SHOCK. INDICA­TES PRESENCE OF HAZARDS DUE
TO ELECTRIC SHOCK.

WARNING!

If you do not follow these instructions exactly, a fire or explosion may result causing property

damage, personal injury or loss of life.

- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

- WHAT T O DO IF YOU SMELL GAS

- Do NOT try to light any appliance

- Do NOT touch any electrical switch.

- Do NOT use any phone in your building.

- Immediately call your gas supplier from a neighbor’s
phone.
Follow the gas supplier’s instructions.

- If you cannot reach your gas supplier, call the fire dep.

4

General Information

WARNING!

The device should not be used by people with reduced physical, mental and sensory, experience and
knowledge. These people must be well-informed and supervised during the work. Children must be
supervised so they do not play with the appliance.

WARNING!
The installation, adjustment, and servicing of this appliance must be carried out by a competent person and
installed in accordance with the current standards and regulations. Failure to correctly install this appliance
could cause injury to persons, animals or damage to property . The manufacturer shall not be held liable for
any injury and/or damage.

DANGER!

Servicing or repairs of the appliance must be carried out by LATTNER authorised service technicians; LATTNER
recommends drawing up a service contract. Bad or irregular servicing could compromise the safe operation
of the appliance, and could cause injury to persons, animals or damage to property for which LATTNER shall
not be held liable.

WARNING!
Modifications to parts connected to the appliance

Do not carry out any modifications to the following parts:

- the boiler

- to the gas, air, water supply pipes and electrical current

- to the flue pipe, safety relief valve and its drainage pipe

- to the constructive components which influence the appliance’s safe operation

WARNING!

When tightening or loosening the screw pipe connections, use only adequate fork spanners.
The improper use and/or the use of inadequate equipment can cause damages (for example water or gas
leakages).

WARNING!

Indications for appliances operating with propane gas
Ensure yourself that before installing the appliance the gas tank has been purged.
For a correct purging of the tank contact the liquid gas supplier or a competent person who has been legally
authorized.
If the tank has not been correctly purged problems could occur during ignition.
If this occurs contact the liquid gas tank’s supplier.

1.5 -SAFETY W ARNINGS

1.4 - INFORMATION TO BE HANDED OVER TO THE USER

Go through the information in this manual with the owner/operator and make sure that he or she is familair
with all necessary operating instructions, in particular:

• Hand over these instructions to the end user, together with any other literature regarding this appliance,

placed inside the envelope contained in the packaging. The user has to keep these documents in a safe

place in order to always have them at hand for future reference.

• Inform the user on the importance of air vents and of the flue outlet system, stressing the fact that is absolutely

forbidden to make any alterations to the boiler.

• Inform the user how to check the system’s water pressure as well as informing him how to restore the correct

pressure.

• Explain the function of time and temperature controls, thermostats, heating controls and radiators, to ensure

the greatest possible fuel economy.

• Remind the user that it is obligatory to carry out a comprehensive service annually and a combustion analysis

every two years (in compliance with the national law).

• If the appliance is sold or transferred to another owner or if the present user moves home and leaves the

appliance installed, ensure yourself that the manual always follows the appliance so that it can be consulted
by the new owner and/or installer.

Failure to follow the instructions indicated in this guide, which is supplied with the boiler, could cause injury
to persons, animals or damage to property . The manufacturer shall not be held liable for any such injury and/
or damage.

5

General Information

1.6 DATA BADGE

A sample Data Plate for a Alkon Boiler is shown in figure
below.

DANGER
Smell of gas

If you smell gas follow these safety indications:

- Do not turn on or off electrical switches

- Do no smoke

- Do not use the telephone

- Close the main gas tap

- Open all windows and doors where the gas leakage has occurred

- Inform the gas society or a company specialized in installing and servicing heating systems

DANGER
Explosive and easily inflammable substances

Do not use or leave explosive or easily inflammable material (as for example: petrol, paint, paper) in the room
where the appliance has been installed.

A sample DataPackaging for a Alkon Boiler is shown in figure
below.

®

LATTNER

LATTNER

6

General Information

1.7 - THE FOLLOWING INSTRUCTION MUST
BE FOLLOWED

- The boiler must only be used for its designated purpose,

as described in the Installation Instructions.

- Each unit is fitted with a data plate. Consult the details on

this plate to verify whether the boiler is compliant with its
intended location, e.g.: gas type, power source and ven­ting classification.

- Only use the boiler with the accessories and spare parts

listed.

- Other combinations, accessories and consumables must

only be used if they are specifically designed for the inten­ded application and do not affect the system performance
and the safety requirements.

- Maintenance and repairs must only performed by trained

professionals.

- Installation of a condensing gas boiler must be reported to

the relevant gas utility company and have it approved.

- You are only allowed to operate the condensing gas boiler

with the vent system that has been specifically designed
and approved for this type of boiler.

- Please note that local permission for the vent system and

the condensate water connection to the public sewer sy­stem may be required.

You must also respect:

- The local building codes stipulating the installation rules.

- The local building codes concerning the air intake and

outlet systems and the chimney connection.

- The regulations for the power supply connection.

- The technical rules laid down by the gas utility company

concerning the connection of the gas connection to the
local gas mains.

- The instructions and standards concerning the safety equi-

pment for the water/space heating system.

- The Installation Instructions for building heating systems.

- The boiler must be located in an area where leakage of

the boiler or connections will not result in damage to the
area adjacent to the boiler or to lower floors of the structu­re. When such locations cannot be avoided, it is recom­mended that a suitable drain pan be installed under the
boiler.

- The boiler must be installed in such way that the all com-

ponents are protected from water (dripping, spraying, rain
etc.) during boiler operation and service.

- The boiler must not be installed on or against carpeting.

- Do not restrict or seal any air intake or outlet openings.

- If you find any defects, you must inform the owner of the

system of the defect and the associated hazard in writing.

DANGER.

Gas is flammable and may cause an explo­sion.
Beware if you smell gas: there may be an explo­sion hazard!

If the information in these instructions is not followed exactly,
a fire or explosion may result causing property damage,
personal injury or death.

- Do not store or use gasoline or other flammable vapors

and liquids in the vicinity of this or any other appliance.

WARNING
WHAT TO DO IF YOU SMELL GAS

- Do NOT try to light any appliance.

- Do NOT touch any electrical switch.

- Do NOT use any phone in your building.

- Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s in­structions.

- If you cannot reach your gas supllier, call the
fire department.

WARNING
Should overheating occur or the gas supply
fail to shut off, do not turn off or disconnect
the electrical supply to the pump. Instead,
shut off the gas supply at a location external
to the boiler.

Unsuitable heating system water can cause the formation of
scale or sludge, which affects system efficiency. It can also
cause corrosion and reduce life of the heat
exchanger.

- You must follow Latner guidelines for boiler water
quality.

- Thoroughly flush the system prior to filling.

- Follow the LATTNER cleaning instructions.

- Never use water that has been treated by a reverse
osmosis, D.I., or distilled water to soften the water to fill
the heating system.

- Do not use inhibitors or other additives unless appro­ved by LATTNER for that purpose!

- When frost protection of the heating system is desired,
only use LATTNER-approved antifreezes. The allowed
maximum concentration is 50%.

- When using oxygen-permeable pipes, e. g. for under
floor heating systems, you must separate the system
from the boiler using plate heat exchangers.

- Valve off boiler while flushing system, do not introduce
any system cleaner into the boiler loop. Flush system
thoroughly to remove all system cleaner before filling
boiler.

Approved antifreeze (max. concentration 50%):

• Rhomar RhoGard Mutli-Metal (AL safe)

• Noble Noburst AL

Approved system cleaner:

• Noble Noburst Hydronic System Cleaner

• Fernox F3 Cleaner

• Rhomar Hydro-Solv 9100

The system cleaners from NoBurst, Rhomar, and
Fernox are not to be used in the boiler. The boiler
must be closed off (valved off) from the rest of the
system or not connected while the cleaners are
in the system. The system should then be drai­ned and then thoroughly flushed with clean wa­ter to remove all the system cleaner.

Approved inhibitors:

• Rhomar Pro-tek 922

• Noble Noburst AL inhibitor

7

General Information

1.10 - GENERAL WARNINGS

This instruction manual is an integral and indispensable
part of the product and must be retained by the person in
charge of the appliance.

Please read carefully the instructions contained in this manual
as they provide important indications regarding the safe
installation, use and servicing of this appliance.

Keep this manual in a safe place for future reference.
The installation and servicing must be carried out in

accordance with the regulations in force according to the
manufacturer’s instructions and by legally competent
authorized persons.

The installations for the domestic hot water production
MUST be build, in their entirety, with materials (taps, pipes,
fittings, etc.) approved for drinkable water.

By a competent person, we imply a person who has a specific
technical qualification in the field of components for central
heating systems for domestic use, domestic hot water
production and servicing. The person must have the
qualifications foreseen by the current laws in force.

Bad or irregular servicing could compromise the safe
operation of the appliance, and could cause injury to persons,
animals or damage to property. The manufacturer shall not
be held liable for any such injury and/or damage.

Before carrying out any cleaning or servicing turn off the
electrical supply to the boiler by means of the ON/OFF switch
and/or by means of the appropriate shutdown devices.

Do not obstruct the intake/outlet terminal ducts.
In the event of failure and/or faulty functioning of the appliance,

switch off the boiler. Do not attempt to make any repairs:
contact qualified technicians.

Any repairs must be carried out by LATTNER authorized
technicians and using only original spare parts. Non­observance of the above requirement may jeopardize the
safety of the appliance.

To guarantee the efficiency and correct functioning of the
appliance it is indispensable to have the boiler serviced
annually by a qualified person.

If the boiler remains unused for long periods, ensure that any
dangerous parts are rendered innocuous.

Before putting again into service an appliance which has been
unused for a certain time, proceed to rinse the domestic hot
water circuit, making the water flowing for the time necessary
to draw the full content of the domestic circuit.

If the appliance is sold or transferred to another owner or if
the present user moves home and leaves the appliance
installed, ensure yourself that the manual always follows the
appliance so that it can be consulted by the new owner and/
or installer.

Only original accessories must be used for all appliances
supplied with optionals or kits (including electrical ones).
This appliance must be used only for the purposes for which
it has been expressively designed. Any other use shall be
considered incorrect and therefore dangerous.

Operating Limits of the boiler:
Max. boiler temperature: 176 °F (80 °C)
Max Allowable Working Temperature ASME: 200 °F
Max. Allowable Working Pressure ASME: 92 psi

1.9 - DISPOSAL

- Dispose of the boiler packaging in an environmentally
sound manner.

- Dispose of components of the heating system (e.g. boiler
or control device), that must be replaced in an environ­mentally responsible manner.

1.8 - TOOLS, MATERIALS AND

ADDITIONAL EQUIPMENT

For the installation and maintenance of the boiler you
will need:

- Standard tools for space heating, gas and water fitting

- Digital manometer that is capable of reading both positive
and negative pressures

- Combustion analyzer

- Digital multimeter

- pH digital meter

- Metric Allen wrenches

- Metric socket wrenches

In addition, a handtruck with a fastening belt is useful.

8

Technical features and dimensions

2.1 - TECHNICAL FEATURES

The ALKON 50 and ALKON 70 boilers are a thermals gas fired
units with an atmospheric fully pre-mixed burner.

They are supplied only in heating version.

These boilers have an input head power of:
176,000 Btu or 227,500 Btu (51,58 or 66,67 kW), These boi­lers are designed for use on gas category IV.
The ALKON boiler is supplied complete with all the safety

and control devices in accordance with all the current
regulations and its technical and functional features comply
with the regulations prescribed by:

ANSI Z21.13 / CSA 4.9 - Gas-fired low pressure
steam and hot water boilers

DESCRIPTION OF COMPONENTS AND FEATURES:

• Aluminium heat exchanger/condenser;

• Fully premixed burner working at constant CO2;

• Electronic ignition;

• Safety high limit thermostat;

• Flow temperature sensor;

• Return temperature sensor;

• Automatic air vent;

• Drain condensate siphon

• Control panel with electrical protection;

2

R CH system return 1 ¼’’

M CH flow system 1 ¼’’
G Gas Inlet Ø ¾’’
Sc Outlet condensate drain siphon (from aluminium body)

Scf Outlet condensate drain siphon (from the flue pipe)
SV Safety valve outlet
A Air intake
S Flue Outlet

TECHNICAL FEATURES
AND DIMENSIONS

2.2 - DIMENSIONS

• eBUS device;

• CH temperature selector switch: 86 ÷176 °F (30 ÷ 80°C);

• Flame modulation in function of the absorbed power;

• Pump overrun function;

• Additional functions : diagnostics of operation parameters

and troubles, antifreeze, technical functions and digital in­dication of failures.

• Constant combustion ratio

• Self adapting output depending on the length of flue ducts

• Pump (only ALKON 70)

• Smoke pressure switch

OPTIONAL KITS:

• Kit of manifold for additional safety devices

• Krömschröder controller E8/Expansion modules and

modulating thermostats
(case for wall mounting)

• Mixing bottle Kit

• Chimney for single, battery or cascade mounting

• Supporting frames

• Kit of blind flanges and hydraulic manifolds

• On-Off pump for ALKON 50.

VIEW FROM ABOVE

VIEW FROM BELOW

24.2’’

(615 mm)

RMG

Sc

Scf

SV

A

S

10.5’’

(266 mm)

36.6’’
(930 mm)

16.9’’

(430mm)

4.2’’

(107 mm)

3.1’’

(78 mm)

7,1’’

(180mm)

3,1’’

(78 mm)

3,9’’

(100 mm)

5,2’’

(132 mm)

4,3’’

(110 mm)

4,3’’

(110 mm)

3,3’’

(85 mm)

3,1’’

(78mm)

5,3’’

(135mm)

4.9’’
(125 mm)

10.5’’
(266 mm)

7.0’’
(179 mm)

9

Technical features and dimensions

2.3 - MAIN COMPONENTS
ALKON 50

N.B.:
The boiler cannot work on natural circulation

AIR

VENT

VALVE

MODULATING

FAN

SMOKE

PRESSURE

SWITCH

GAS VALVE

SPACER PIPE

REPLACEABLE

FOR MOUNTING

OF OPTIONAL

CIRCULATOR

FLOW

TEMPERATURE

SENSOR

RETURN

TEMPERATURE

SENSOR

OVERHEAT

THERMOSTAT

IGNITION

TRANSFORMER

MIN. WATER

PRESSURE

SWITCH

IGNITION

ELECTRODE

SAFETY VALVE

ALUMINIUM HEA T
EXCHANGER/
CONDENSER

CONDENSATE

DRAIN

(Ø 1‘‘ - 25 mm)

FLUE

OUTLET PIPE

(Ø 3.14’’

- 80 mm)

PIPE WITH

SMOKE

SAMPLING

SIPHON

AIR INTAK E

OPENING

(Ø 3.14’’

- 80 mm)

R

1’’ ¼

R

1’’ ¼

G

¾’’

10

Technical features and dimensions

ALKON 70

PUMP

AIR

VENT

VALVE

MODULATING

FAN

SMOKE

PRESSURE

SWITCH

GAS VALVE

FLOW

TEMPERATURE

SENSOR

RETURN

TEMPERATURE

SENSOR

OVERHEAT

THERMOSTAT

IGNITION

TRANSFORMER

MIN. WATER

PRESSURE

SWITCH

IGNITION

ELECTRODE

SAFETY VALVE

ALUMINIUM HEA T
EXCHANGER/
CONDENSER

CONDENSATE

DRAIN

(Ø 1‘‘ - 25 mm)

FLUE

OUTLET PIPE

(Ø 3.14’’

- 80 mm)

PIPE WITH

SMOKE

SAMPLING

SIPHON

DETECTION

ELECTRODE

AIR INT AKE

OPENING

(Ø 3.14’’

- 80 mm)

R

1’’ ¼

R

1’’ ¼

G

¾’’

11

Technical features and dimensions

ATTENTION!
THE PRE- FORMING FOR THE BOILER PUMP
IS ONLY FOR THE PUMP KIT SUPPLIED BY
LATTNER

2.4 - BOILER WATER CIRCUIT DIAGRAM

1 Gas valve
2 CH flow temperature sensor
3 CH return temperature sensor
4 Condensate drain siphon
5 Overheat thermostat
6 Heat exchanger
7 Burner
8 Air vent valve
9 Flue outlet / Air intake
10 Fan
11 Premix
12 Room sealed chamber
13 Replaceable pipe for insertion optional pump

(only for ALKON 50)

pump only for ALKON 70
14 Pressure switch against lack of water
15 Safety valve supplied
16 Smoke pressure switch
17 Manomètre (optionelle)

M C.H flow
G Gas supply
R C.H. return

M

R

G

1

2

3

4

5

6

7

8

12

9

10

11

13

14

15

16

17

60

40 80

20 100

120

0

12

Technical features and dimensions

Minimum heat input

Nominal heat input (low)
(*) Nominal heat input (high) (reduction for Altitude)
Nominal heat output (HT)
Minimum heat output (HT)
Efficiency at full load (100%)
Efficiency at min load
Nominal heat output in condensing mode
Minimum heat output in condensing mode
Efficiency at nominal load in condensing mode
Efficiency at min load in condensing mode
Combustion efficiency at nominal load
Combustion efficiency at min load
Stand-by losses
Flue gas temperature (Flue gas temp - room temp)
Air excess λ

Condensate production max

Boiler category
Minimum water flow rate in CH circuit Δt 36°F (20°C)
Min. pressure in CH circuit
Max. allowable pressure in CH circuit
Water content in primary circuit
Maximum operating temperature
Minimum operating temperature

Electrical supply

Net weight
Gross weight

2.5 - PERFORMANCE DATA

For information regarding the adjustment of: INJECTORS - BURNER PRESSURES – DIAPHRAGMS – OUTPUTS – GAS CONSUMPTIONS
please refer to the paragraph BURNER ADJUSTMENT.

[Btu/hr (kW)]
[Btu/hr (kW)]
[Btu/hr (kW)]
[Btu/hr (kW)]
[Btu/hr (kW)]
[%]
[%]
[Btu/hr (kW)]
[Btu/hr (kW)]
[%]
[%]
[%]
[%]
[%]
[°F (°C)]
[%]
[lb/hr (kg/hr)]

[gal/min (l/min)]
[psi (kPa)]
[psi (kPa)]
[gal (L)]
[°F (°C)]
[°F (°C)]

[V-Hz]

[lb (kg)]
[lb (kg)]

55,800
227,500
204,750
199,000
47,700

87.45

85.50
298,600
54,000

91.46

96.7

98.4

98.3

0.22
124

20.6

20.3

IV

1.43

7.3
92
1
176
86

120 - 60

130
141

(16.35)
(66.67)
(60.01)
(58.32)
(13.98)

(70.0)
(15.83)

(51.1)

(9.2)

(5.40)
(50)
(634)
(3.9)
(80)
(30)

(59)
(64)

ALKON 70

38,500
176,000
158,400
154,000
32,900

87.66

85.50
161,000
37,200

91.6

96.70

97.8

98.4

0.3
110

20.6

16.5

IV

1.01

7.3
92
1
176
86

120 - 60

111
121

(11.28)
(51.58)
(46.42)
(45.13)
(9.6)

(47.2)
(10.9)

(43.3)

(7.5)

(3.86)
(50)
(634)
(3.9)
(80)
(30)

(50)
(55)

ALKON 50

Max dynamic gas pressure A (natural)
Nominal dynamic gas pressure A (natural)
Min. dynamic gas pressure A (natural)

Max dynamic gas pressure E (Propan HD)
Nominal dynamic gas pressure E (Propan HD)
Min. dynamic gas pressure E (Propan HD)

[in wc (kPa)]
[in wc (kPa)]
[in wc (kPa)]

[in wc (kPa)]
[in wc (kPa)]
[in wc (kPa)]

10.5

7.0

3.5

13.0

11.0

8.0

(2.61)
(1.74)
(0.87)

(3.23)
(2.74)
(1.99)

(*) For adjustments, refer to section 3.26 and 3.27

13

Instructions for the installer

3

INSTRUCTIONS FOR
THE INSTALLER

3.1 - GENERAL WARNINGS

WARNING!
This boiler has to be destined for the use for
which it has been expressively designed for.
Any other use shall be considered improper
and therefore dangerous.
This boiler is designed to heat water at a
temperature inferior to boiling point at an
atmospheric pressure.

WARNING!
These appliances are exclusively designed
to be installed inside adequate boiler rooms.
Therefore these appliances must not be
installed and operated externally. An outdoor
installation could cause malfunctioning and
could be dangerous. For external
installations, it is recommended to use
appliances which are specifically designed
and predisposed for this purpose.

Before installing the boiler the following points
have to be carried out by a competent engineer:

a) The whole system should be thoroughly
flushed in order to remove any residual dirt or
grime which could compromise the correct
boiler operation.
b) Check that the boiler has been preset for
operating with the gas type available.
This is verifiable via the indication on the
packaging and on the data badge;
c) Check that the chimney/flue pipe has an
adequate draught,does not have any
constrictions, and that no other appliance’s flue
outlets have been fitted, unless the chimney
is serving more than one heating appliance,
according to the specific standards and
regulations in force.
The connection between the boiler and
chimney/flue outlet can be made only after this
verification has been carried out.

WARNING!
In rooms where there is the presence of
aggressive vapours or dust the appliance
must operate independently from the air
present in the boiler’s location room!

WARNING!
The appliance must be installed by a qualified
engineer, who complies to the technical­professional requirements, who, under his own
responsibility, guarantees the compliance of
the standards according to the latest
regulations.

WARNING!
The appliance must be installed only on a

closed, vertical flat wall, made of non
combustible material.
The appliance must be positioned so that at
least the minimum operational and servicing

clearances are provided.

The boiler must be connected to a heating system which is
compatible to its performance and output.

Before boiler installation, complete all of the
following instructions:

The installation must conform to the requirements of the
authority having jurisdiction or, in the absence of such
requirements, to one of the following:

- United States - Installation must conform to the requirements

of the

National Fuel Gas Code, ANSI Z223.1/NFPA 54.

- Canada - Installation must conform to the requirements of

CAN/CSA-B149.1 - Natural Gas and Propane Installation
Code

Where required by the authority having jurisdiction, the
installation must conform to the Standard ASME CSD-1

Controls and Safety Devices for Automatically Fired Boilers

NOTES:

- Installers must follow local regulations with respect to

installation of Carbon Monoxide (CO) Detectors. Also, follow
the maintenance recommendations in this manual.

- FOR MASSACHUSETTS INSTALLATIONS: The boiler must

be installed by a plumber or gas fitter licensed within the
Commonwealth of Massachusetts.

14

Instructions for the installer

3.3 - PACKAGING

The ALKON 50/70 boiler is supplied fully assembled in a
strong cardboard box.

After having unpacked the boiler check that it is
intact and undamaged.

CAUTION

Keep the packaging material (cardboard box,
plastic bags, polyester protection etc.) out of

the reach of children as they can be
dangerous.

LATTNER refuses all liability for injury to
persons, animals or damage to property
deriving from not having respected the above
mentioned recommendations.

In the packaging, in addition to the boiler, you can also find
the following contents:

- Tecnical documetation set

- N° 3 plastic plugs for fixing boiler Ø 0,47‘‘ (12 mm)

- Boiler support bracket

- Condensate evacuation siphon

- Aluminum pipe Ø 3.1‘‘ (80 mm) for smoke evacuation

- Thread Adapter Kit NPT/gas (Supply - Return - Gas),

with sealing rings.

- Gas Ball Valve

3/4”

3.2 - CODE AND STANDARDS
APPROVALS

ALKON 50 - 70 has been reviewed for compliance with the
applicable sections of the following North
American Standards:

ANSI Z21.13 / CSA 4.9 - Gas-fired low pressure
steam and hot water boilers

ASME SECTION IV: ASME Boiler and Pressure Vessel
Code with addenda, Section IV: Rules for Construction of
Heating Boilers

SCAQMD RULE 1146.2. EMISSIONS OF OXIDES OF
NITROGEN FROM LARGE W ATER HEA TERS AND SMALL
BOILERS AND PROCESS HEA TERS

CSD-1: CONTROLS AND SAFETY DEVICES FOR
AUTOMATICALLY FIRED BOILERS

CAUTION
The boiler may be damaged when not secu­red properly.

- Only transport the boiler using appropriate transportation
equipment, such as a handtruck with a fastening belt or
special equipment for maneuvering steps.

- When shipping the boiler must be secured on the tran­sportation equipment to prevent it from falling off.

- Protect all parts against impacts if they are to be transpor­ted.

- Follow the transportation markings on the packaging.

• Packaged boilers must always be lifted and carried by two
people, or you must use a handtruck or special equipment
for transport.

14.6’’

(370 mm)

28.1’’

(715 mm)

40.4’’

(1025 mm)

15

Instructions for the installer

3.4 - MINIMUM CLARANCE FOR

SERVICING

Observe minimum distance of the boiler

TOP of the boiler: 24’’ (600 mm)

FRONT of the boiler: 12” + 24” = 36” (900 mm)
RIGHT side: 12’’ (300 mm)
LEFTside: 12’’ (300 mm)
FLOOR/GROUND: 40’’ (1000 mm)
BACK of the boiler: 0’’

Maintain an installation clearance from combustible construc­tion from hot water piping of at least 1" (25 mm).

- Remove the packaging materials.

- Do not tear the packaging.

- Lay the boiler on its back during unpacking. When

unpacking, the casing can be removed from the boiler.
This part can be kept apart during installation. It must be
placed on the boiler and fixed with the screw behind the
door before the boiler is started up.

- The boiler can be mounted practically to any wall with the

suspension bracket and the enclosed mounting equip­ment.

- The wall must be flat and of sufficient strength in order to

be able to securely hold and support the boiler weight
with its water content.

- Take note of the necessary space around the boiler for

installation of venting system, pipework and servicing. See
drawing in section 3.4

The location of the boiler can be determined by using the
draw on page 16. Remember to account for the spacing of the
plumbing kit.

- Drill the necessary holes

- Install the mounting bracket to the wall using the supplied

mounting materials

CAUTION
Lifting and carrying precautions.
To avoid personal injury please follow these
recommendations:

- Always lift the boiler with 2 people or use
special equipment.

- When lifting the boiler, bend the knees, and
keep the back straight and feet apart.

- Do not lift and twist at the same time.

- Lift and carry the boiler close to the body.

- Wear protective clothing and gloves to pro­tect from any sharp edges.

CAUTION
Lift the boiler only by the boiler's rear wall.

- Dispose the packaging materials.

12.3’’
(311.5 mm)

11.8 ’’

300 mm

11.8’’

300 mm

39.4’’
1000 mm

23.6’’

(600 mm)

10.5’’

266 mm

23.6’’

600 mm

Operating

space

16

Instructions for the installer

Special attention shall be paid to local regulations and laws
about boiler houses and particularly to the obligation of
keeping minimum clearances and empty space around the
boiler. The installation shall be in compliance with all latest
regulations and laws about boiler houses, installations of
heating and hot-water systems, ventilation, chimneys capable
of evacuating the flue gases of condensing boilers and any
other applicable requirement.

When selecting the position for the installation of the boiler
please comply to the following safety requirements:

• Guarantee an easy access to the components of the boiler

to facilitate the possible operations of ordinary and extra­ordinary maintenance.

• The room where the boiler will be placed must always be

frost free.

• The appliance must be installed exclusively on a vertical
and solid wall, capable of adequately supporting the weight
of the boiler;

• The wall must not be made of inflammable material.

3.5 - BOILER LOCATION INSIDE A BOILER HOUSE

• Do not store or use gasoline or other flammable vapors

and liquids in the vicinity of this or any other appliance.

• Never use or store any chlorinated detergents or haloge-

nated hydrocarbons (e.g. in spraycans, solvents and de­tergents, paints, adhesives) in proximity of the boiler.

• The boiler must be installed in such a way that it is pro-

tected from water (dripping, spraying, rain, etc.) during
operation and service (circulator replacement, condensa­te trap, control replacement, etc.)

• This boiler is for intended for indoor installations only.

Products to avoid present in boiler room
and/or around combustion air intake

Spray cans containing chloro-/fluorcarbons
Ammonium and/or ammonium solutions
Permanent wave solutions
Chlorinated waxes and/or cleaners
Swimming pool chemicals based on chlorine
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents
found in household laundry rooms
Adhesives used to fasten building products and
other similar products

Areas likely to have contaminants

Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages with workshops

R

MG

S

3.3’’

(85 mm)

4.3’’

(110 mm)

4.3’’

(110 mm)

5.2’’

(132 mm)

7.0’’

(177 mm)

33.7’’
(856 mm)

34.1’’
(865.5 mm)

1.8’
(45 mm)

12.3’’
(311,5 mm)

10.4’’
(265 mm)

4.1’’
(103 mm)

2.2’’
(56.5 mm)

17

Instructions for the installer

• Mark the 3 holes with the wall bracket, using a spirit level.

• Install the wall bracket with the 3 screws

• With 2 people, lift the boiler by holding it by its back and by

the transport rail and install it on the wall bracket

• The boiler can be moved sideways to get the correct posi-

tion.

3.6 - CONNECTIONS

A) Thread Adapter Kit NPT/gas
M=

CH system flow 1’’¼

R=

CH system return 1’’¼

G = Gas Ball Valve ¾”

RG = Gas Adaptor ¾‘‘

S = Condensate Drain

S

G

R

M

RG

3.7 - INSTALLATION ON EXISTING

HEATING SYSTEMS

- The circulation pump’s output, the head and flow direction

are suitable.

- The gas feeding supply pipe and the eventual tank are

constructed according to the regulations in force.

- The expansion vessels assure the total absorption of the

dilatation of the fluid contained in the system.

- The system has been cleaned of impurities and lime scale.

Boiler system flushing
(Not Boiler heat exchanger)

When replacing an existing boiler the heating
system should be flushed with the old boiler in

place before the new boiler is added to the sy­stem. If the old boiler has already been removed a bypass
must be piped in when the new boiler is installed in order
to facilitate the flushing of the system.
The boiler must be valved off from the system, while the
system is flushed.
No system cleaner should ever enter the boiler heat
exchanger because of its caustic nature it could damage
the heat exchanger.

When the appliance is installed on existing systems, ensure
yourself that:

- The flue outlet pipe is suitable for condensing boilers, for
the temperature of the products of combustion, calculated
and manufactured according to the regulations in force. It
must be installed as much as possible in a straight line,

R

M

G

S

3.3’’

(85 mm)

4.3’’

(110 mm)

4.3’’

(110 mm)

5.2’’

(132 mm)

7.0’’

(177 mm)

33.7’’
(856 m m)

34.1’’
(865.5 mm)

1.8’’

(4.5 mm)

12.3’’
(311,5 mm)

10.4’’
(265 mm)

4.1’’
(103 mm)

2.2’’
(56.5 mm)

0,5’’

(12 mm)

0,5’’

(12 mm)

0,5’’

(12 mm)

A

18

Instructions for the installer

tested for soundness, insulated and must not have any
occlusions or restrictions.

- The flue outlet pipe has a connection for the discharge of
condensate.

- The boiler room has a suitable outlet for the discharge of
condensate produce by the boiler.

- The electrical system has been fitted in compliance to the
specific norms and the work has been carried out by a
competent person.

19

Instructions for the installer

3.8 - GAS CONNECTION

DANGER

The gas connection must be carried out by a
registered engineer who will have to respect

and comply to the regulations in force and to
the requirements indicated by the local gas
supplier. An incorrect installation could

cause injury to persons, animals or damage
to property . The manufacturer shall not be
held liable for any injury and/or damage.

WARNING
LATTNER wall mounted boilers are built to run
on Natural Gas or Propane Gas.
The gas type the boiler is suitable for is
indicated on the packaging label and on the
data plate boiler.
First check the identification plate on the boiler
for the suitable gas type.

DANGER
Do not use the boiler for another type of gas
than indicated on the identification plate of the
boiler. This will cause improper functioning and
can damage the boiler.

Natural gas: refer to chapter 3.8.1
Propane gas: refer to chapter 3.8.2

Pipe sizing for natural gas

- Contact gas supplier to size the gas supply line and meter.

Gas piping

The boiler gas pipe is equipped with external 3/4" M-NPT
thread, onto which the tail piece of the gas shut off valve can
be connected. Use appropriate sealing.

The connection to the boiler must include a suitable method
of disconnection and a gas control valve must be installed
adjacent to the boiler for isolation purposes. The nominal inlet
working gas pressure measured at the boiler should be 7"
W.C. (18 mbar) for Natural gas (Gas A).
Maximum pressure with no flow (lockup) or with the boiler
running is 10.5 inches W.C. Minimum pressure with the gas
flowing (verify during boiler startup) is 4.0 inches W.C.

Pipe sizing for propane gas

- Contact gas supplier to size pipes, tanks, and 100% lockup
gas pressure regulator.

Propane Supply Pressure Requirements

- Adjust propane supply regulator provided by the gas sup­plier for 13 inches W.C. maximum pressure.

- Pressure required at gas valve inlet pressure port:

- Maximum 13 inches W.C. with no flow (lockup) or with
boiler running.

- Minimum 8 inches W.C. with gas flowing (verify during
boiler startup).

Ensure that the high gas pressure regulator is installed at
least 6 to 10 feet upstream of the boiler.

Gas piping

- Use a gas shut off valve compatible with propane gases.

- A sediment trap must be provide upstream of the gas con­trols.

The boiler pipe is provided with external 3/4" M-NPT thread,
onto which the tail piece of the gas shut off valve can be
screwed. Use appropriate sealing.

The connection to the boiler must include a suitable method
of disconnection.
The nominal inlet working gas pressure measured at the boi­ler should be 11" W.C. (27 mbar) for Propane gas (Gas E).
A gas control valve must be installed adjacent to the boiler for
isolation purposes. The nominal inlet working gas pressure
measured at the boiler should be 11 inch W.C. (27 mbar) for
Propane gas (Gas E).

3.8.1 - GAS CONNECTION WITH NATURAL GAS

The gas supply connection must comply with lo­cal regulations or, if such regulations do not exist,
with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54.
For Canada, the gas connection must comply with
local regulations or, if such regulations do not exist,

with the CAN/CSA-B149.1-05 - Natural Gas and
Propane Installation Code

Before installing the boiler it is recommended to

thoroughly clean all the supply piping in order to
remove any eventual residual grime which could
compromise the boilers correct functioning.

As a safety measure against gas leaks,
LATTNER recommends installing a surveillance
and protective system made up of a gas leakage
detector combined with an on-off selenoid valve
on the gas supply line.

DANGER
Always check the safety of the gas pipe system
by means of a bubble test using leak-search
spray.

The boiler and its individual shut off valve must
be disconnected from the gas supply piping sy­stem during any pressure testing of that system
at test pressures in excess of 1/2 PSI (3.5kPa).

The boiler must be isolated from the gas supply
piping system by closing its individual manual
shutoff valve during any pressure testing of the
gas supply piping system at test pressures equal
to or less than 1/2 PSI (3.5 kPa).

3.8.2 - GAS CONNECTION WITH PROPANE GAS

20

Instructions for the installer

3.9 - FLOW AND RETURN PIPE CONNECTIONS

WARNING!
IT IS ABSOLUTEL Y FORBIDDEN TO FIT ON-OFF
VAL VES ON THE GENERA TOR T O THE FORE
OF THE SAFTEY DEVICES

WARNING!
Before installing the boiler we recommend
that the system is flushed out with a suitable
product, in order to eliminate any metallic
tooling or welding residues, oil and grime
which could reach the boiler and affect the
proper running of the boiler.

GATE
VALVES

R

M

NOTICE
When using plastic pipes, observe the supplier’s
instructions especially those referring to recom­mended jointing techniques and the notes rela­ting to the heating system water.

NOTICE
To prevent contamination in the heating system
we recommend you integrate a dirt filter in the
return pipe, near the boiler. In an old system it is
a requirement to install a dirt filter. Also install
shutoff valves to enable filter cleaning immedia­tely upstream and down stream of the dirt filter
(scale cartridge or y-strainer).

When determining the size of the CH circuit pipes it is
essential to bear in mind the pressure losses induced by any
of the system’s components and by the configuration of the
same system.

The route of the piping has to be conceived taking all the
necessary precautions in order to avoid air locks and to
facilitate the continuous purging of the system.

- Connect CH flow pipe to the Supply connection making
sure it is not under stress. Use a supply pipe with a mini­mum diameter of 1’’¼ (32 mm).

- Connect the return pipe with a fiat rubber seal installed to
the Return connection making sure it is not under stress.
Use a return pipe with a minimum diameter of 1’’¼ (32
mm).

WARNING!

Ensure yourself that the system’s piping is not
used as the earth clamps for the electrical or
telephonic system. They are absolutely
unsuitable for this use. In a short time this could
cause serious damage to the piping, boiler
and radiators.

NOTICE
The pipe to be connected to the boiler must be
cleaned before connecting in order to prevent
dirt from entering and damaging the boiler.

21

Instructions for the installer

The following table gives an indication of the pump’s flow rate
in function of the Δt of the primary circuit.

ALKON 50

ALKON 70

3.10 - PRIMARY BOILER PUMP OR BOILER SYSTEM PUMP

NOTE: The use of a mixing header fitted between the boiler circuit and the system circuit is always advisable.
It becomes INDISPENSABLE if the system requires flow rates superior to the maximum permitted boiler flow
rates, which is to say lower than 27 °F (15 K).

Pressure losses in wc

Q: water flow rate gal/h

PRESSURE A V AIBLE TO THE SYSTEM (red)
PRESSURE LOSSES (Blue)

Power supply in btu (kW)

Max flow rate
demanded in gal/h (l/h)

ΔΔ

ΔΔ

ΔT 27°F (15°C)

Max flow rate
demanded in gal/h (l/h)

ΔΔ

ΔΔ

ΔT 36°F (20°C)

154,000
(45,13)

199,000
(58,32)

683

(2826)

513

(2120)

683

(3927)

663

(2946)

If determined by the installer
or technical engineers must
be sized according to the
data of boiler and system.

In case of fixed raet pump is
recommended to choose a
circulator with flow rate and
head at about 2/3 of the
characteristic curve.

The

ΔΔ

ΔΔ

Δt between supply and

return boiler should never be
less than 27 °F (15 K).

PRESSURE LOSSES
ALKON 50

B

(1) VALUES REFER TO THE MAX SPEED
(2) IF EQUIPPED WITH OPTIONAL PUMP

PRESSURE AV AIBLE
ALKON 70 (1)
ALKON 50 (2) (1)

A

The chart below shows, respectively:

A) Prevalence available net losses of the boiler (For boilers

equipped with a pump supplied by LATTNER)

B) Pressure drop between Return and Delivery (For boilers

supplied without pump)

Size of the pumps

22

Instructions for the installer

3.12 - WORKING PRESSURE

The boiler’s maximum allowable working pressure is set at
92 psa (634 kPa); whilst the minimum pressure is pre­charged to 7,3 psa (50 kPa).

3.11 - PRESSURE RELIEF VALVE DRAIN

PIPE

WARNING!
Please remember that it is forbidden to
interpose, between the boiler and the
pressure relief valve, any type of cutting-off
device. Moreover it is recommended to use
cutting-off valves which do not exceed the
maximum allowable operating pressure.

WARNING!
In correspondence to the heating pressure
relief valve foresee the installation of a
discharge pipe with a funnel and a siphon
which lead to an adequate drainage. The
drainage has to be controllable by sight.
If this precaution is not made, an eventual
intervention of the pressure relief valve could
cause injury to persons, animals or damage
to property. The manufacturer shall not be
held liable for any injury and/or damage.

3.13 - CONNECTING THE EXPANSION
VESSEL IN A SINGLE BOILER
SYSTEM

CAUTION
Damage to the installation due to faulty
pressure relief valve.

An expansion tank must be part of the central heating system.
The expansion tank must be appropriate to the water content
of the installation. The pre-charge pressure depends on the
installation height above the mounted expansion tank.

1

R MG

NOTICE
The expansion tank is NOT a part of the delivery
and should be sourced locally. Please refer to
the expansion tank manufacturer for further in­formation.
Fill expansion tank to a minimum of 14.5 psi.

NOTICE
For the boiler to function correctly, it is necessary
to connect the expansion tank to the expansion
tank connection on the boiler. If the expansion
tank is not connected to the supplied connection
damage to the boiler may occur.

This reliev valve comply with the standard for
Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems ANSI
Z21.22b-01(R08)/CSA 4.4b-01(R08)
and/or the standard Temperature, Pressure,
Temperature and Pressure Relief Valves and
Vacuum Relief Valves CAN1-4.4-M80

23

Instructions for the installer

A

B

C

3.15 - CONDENSATE DRAIN

During the combustion process the boiler produces
condensate which, through the “A” pipe, flows into the siphon.
The condensate which forms inside the boiler has to be routed
into an adequate drain by means of the pipe “B”. otherwise

the boiler will not function and can cause property damage.

The condensate must be drained from the boiler in accordan­ce with local, state or federal rules and regulations.

DANGER!
Before commissioning the appliance fill the
siphon and check the correct drainage of the
condensate.
If the appliance is used with the condensate
drain siphon empty there could be danger of
intoxication resulting from the escape of flue
gasses.

The connection between the appliance and the sewage sy­stem must be carried out in compliance with the specific refe­rence standards, and in particular:

- prevent the end user utilizing the condensate produced;

- a siphon must be fitted (supplied with the boiler);

- there must be no bottlenecks;

- the connection must be made just under the bottom part of
the boiler;

- it must be installed so as to avoid freezing of the liquid
when the boiler is operating and prevent the eventual pres­surization of the sewage system;

- consent the correct downflow of the appliance’s liquid di­scharges;

- it must be made with materials which are resistant to con­densate

- if the condensate outlet of the boiler is lower than the drain,
a condensate pump must be used.

- The condensate produced by the boiler has a pH value
between 3 and 4.

- Do not drain the condensation water to the external rain
gutter because of the danger of freezing and blockage of
the drain.

- Install a neutralization unit if required by the local code

Condensate inlet
coming from the
flue outlet

Condensate drain
pipe of boiler and
chimney
(to connect to the
sewage system

Condensate
inlet coming
from the heat
exchanger

NOTICE

Use materials approved by the authority having
jurisdiction. in the absence of such authority, PVC
and CPVC pipe must comply with ASTM D1785,
F441 or D2665. Cement and primer must com­ply with ASTM D2564 or F493.
For Canada, use ULC certified PVC or CPVC
pipe, fittings and cement.

3.14 - UNDERFLOOR HEATING SYSTEM

(PLASTIC PIPES)

NOTICE

When using oxygen-permeable pipes, e. g. for
floor heating systems, you must separate the

system using plate heat exchangers.
No recourse can be made to the terms of the
warranty in the event of failure to observe the
regulations pertaining to plastic underfloor
heating pipes.

WARNING

Before putting the boiler into operation fill the
condensate trap with 1.27 cups / 300 ml of wa­ter. If the boiler will be installed in a high tempe­rature installation such as baseboard with a
supply temperature of 160°F or above, fill the
condensate trap with vegetable oil instead of
water.

Periodic cleaning of the condensate disposal sy­stem must be carried out.

24

Instructions for the installer

3.16 - WATER TREATMENT

The chemical/physical features of the heating system’s water
are fundamental for the boiler’s correct operation and safety.

Among the inconvenients caused by the bad quality of the
feeding water, the most frequent and the most serious is the
incrustation of the boiler thermal exchange surfaces.

Less frequent, but also serious, is the hydraulic circuit
surfaces.

It is ascertained that the boiler incrustations, due to their low
thermal conductivity , highly reduce the thermal exchange, even
if with a thickness of some millimetres and provoque a very
dangerous localised overheating.

We suggest to make the water treatment of the heating circuit
in the following cases:
a) When the hardness of the water is higher than 9 grains

(15°f);
b) For C.H. installations with large water content;
c) Renewal of the water system due to uncontrolled leakages;
d) Subsequent refilling of the system due to maintenance

works on the installation;
e) Presence of different metals in the hydraulic circuit.
The scope of this treatment is finalized for eliminating or

substantially reducing the following problems:

- lime scale deposit

- corrosion sludge

- deposits

- microbiological growths (moulds, bacteria etc.)

An appropriate treatment of the supply water will prevent
the above stated problems and will maintain the correct
operation and efficiency of the generator in time.

For this purpose it will be necessary to fix the following
chemical-physical characteristics of the water:

PH include between 6,5 and 8
Hardness 6 ÷ 9 grains (9 ÷ 15 fr)

Water hardness

When there is a water hardness of more than 6 to 9 grains
hardness a water softener must be installed.

Sediment

If there is sediment in your domestic water supply sediment
filter or other suitable device should be used to remove it.

THE INSTALLA TION MUST BE FORESEEN ON THE RETURN
PIPE OF THE PRIMARY CIRCUIT DOWNSTREAM OF THE
CIRCULATING PUMP.

WARNING!

All necessary precautions must be taken for
preventing the formation and localization of
oxygen in the system’s water. For this reason,
ensure yourself that the plastic piping used in
underfloor heating systems is impermeable
to oxygen.

If any anti-freeze solutions are used ensure that they are
compatible with aluminium and any other boiler
components and materials.

WARNING!
Any damage caused to the boiler due to the
formation of lime scale or by corrosive water
will not be covered by the warranty.

WARNING
Appropriate steps must be taken to ensure

the indirect tank water heater does not be­come plugged by scale caused by hard wa­ter or sediment.
If the indirect tank water heater becomes

plugged by either scaling from hard water of
sediment it is not the responsibility of LA TT ­NER.

25

Instructions for the installer

3.17 - COMBUSTION AIR AND VENTILATION

OPENINGS

Provisions for combustion and ventiiation air must be made
in accordance with section 5.3, Air for Combustion and Venti­lation, of the National Flue Gas Code, ANSI Z223.1/NFPA 54.,
or Sections 7.2, 7.3 or 7.4 of CAN/CSA-B149.1-05,
installation
Codes, or appiicabie provisions of the local building codes.

CAUTION
BOILER DAMAGE AND OPERATIONAL
FAILURES

Due to insufficient or improper openings for com­bustion air and/or ventiiation of the boiler room.
Provisions for combustion air and ventiiation are
always required, regardiess whether the combu­stion air is taken from the outside (sealed com­bustion) or inside (room air for combustion).
Insufficient ventilation of the boiler room can lead
to high air temperatures. This can result in boiler
damage.

- Make sure that intake and exhaust openings
are sufficiently sized and no reduction or closu­ re of openings takes place.

- When the problem is not resolved, do not ope­ rate the boiler.

- Please note these restrictions and its dangers
to the operator of the boiler.

WARNING

BOILER DAMAGE !

Due to contaminated air.

- Boiler must be clear and free from combustible
materials, gasoline and other flammable vapors
and liquids, and corrosive liquids and vapors.
Never use chiorine and hydrocarbon containing
chemicals (such as spray chemicals, solution
and cleaning agents, paints, giues etc) in the
vicinity of the boiler.

- Do not store and use these chemicals in the
boiler room.

- Avoid excessive dust formation and buildup.

NOTICE

When one expects contaminated combustion air
(near swimming pools, chemical cleaning ope-

rations and hair salons),
sealed combustion operation is recommended.

DANGER

Fire danger due to flammable materials or liqui­ds.

-Do not store flammable materials and liquids in
the immediate vicinity of the boiler.

All Air from inside the Building (room air)

The closet shall be provided with two permanent openings
communicating directly with an additional room(s). The total
input of all gas utilization equipment installed in the combi­ned space shall be considered in making this determination.
Each opening shall have a minimum free area of 1 square
inch per 1,000 Btu per hour of total input rating of all gas
utilization equipment in the confined space, but no less than
100 square inches. One opening shall commence within 12
inches (305 mm) of the top, and one opening shall commen­ce within 12 inches (305 mm) of the bottom of the enclosure.
The minimum dimension of air openings shall be not less
than 4 inches (101 .6 mm).

All Air from Outdoor (seaied combustion)

The cioset shall be provided with two permanent openings,
one commencing within 12 inches (305 mm) from the top,
and one commencing within 12 inches (305 mm) from the
bottom of the enclosure. The openings shall communicate
directly, or by ducts, with the outdoors or spaces (crawi or
attic) that freely communicate with the outdoors.
The minimum dimension of air openings shall be no less
than 4 inches (101.6 mm).

1. Where directly communicating with the outdoors, each ope­ning shall have a minimum free area of 1 square inch per
4,000 Btu/hr of total input rating of all equipment in the enclo­sure.

2. Where communicating with the outdoors through vertical
ducts, each opening shall have a minimum free area of 1
square inch per 4,000 Btu/hr of total input
rating of ali equipment in the enclosure.

3. Where communicating with the outdoors through horizon
tal ducts, each opening shall have a minimum free area of 1
square inch per 2,000 Btu/hr of total input rating of ali equip­ment in the enclosure.

4. Where ducts are used, they shall be of the same cross­sectional area as the free area of the opening to which they
connect.

26

Instructions for the installer

3.18 - INSTALLATION OF THE EXHAUST
AND AIR INTAKE SYSTEM

NOTICE

Consult local and state codes pertaining to spe­cial building
code and fire department requirements. Adhere

to national
code requirements.

NOTICE

Observe the listed maximum lengths of vent sy­stem which are boiler model dependent.The ma­ximum permissible lenghts are listed at page 26

- 29

Minimum clearance of 4 ft (1.22m) horizontally from, and in no
case above or below, unless a 4 ft (1.22 m) horizontal distan­ce is maintained, from electric meters, gas meters, regulators
and relief equipment.

The minimum distance from adjacent public walkways, adja­cent buildings, openable windows and building openings shall
not be less than those values specified in the National Fuel
Gas Code, ANSI Z223.1 / NFPA 54 and / or the Natural Gas
and Propane Installation Code, CAN/CSA B149.1

Do not extend exposed vent pipe outside the building beyond
recommended distance. Condensate could freeze and block
vent pipe.

Vent should terminate at least 3 ft (915 mm) away from adja­cent walls, inside corners and 5 ft (1525 mm) below roof ove­rhang (see figure).

it is not recommended to terminate vent above any door or
window, condensate can freeze causing ice formations.

Do not use chimney as a raceway if another boiler or fire
place is vented into or through chimney.

EXHAUST

INTAKE

12’’ (305 mm)

minimum

12’’ (305 mm)

minimum

12’’ (305 mm)

minimum

12’’ (305 mm)

minimum

12’’ (305 mm)

minimum

NOTICE
Terminals should be positioned as to avoid pro­ducts of combustion entering openings into bu­ildings or other vents.

NOTICE
Terminals should be positioned as to avoid pro­ducts of combustion entering openings into bu­ildings or other vents.

NOTICE

Maintain 12” of clearance above the highest anti­cipated snow level or grade or, whichever is gre­ater. Please refer to your local codes for the snow
level in your area.

NOTICE

The whole route of the vent system must be in­stalled upwards, never downwards,
completely nor partly.

NOTICE

The terminal should be located where dispersal
of combustion products is not impeded and with
due regard for the damage or discolouration that

might occur to building products in the vicinity
(see above figure).
In certain weather conditions condensation may
also accumulate on the outside of the air inlet
pipe. Such conditions must be considered and
where necessary insulation of the inlet pipe may
be required.

In cold and/or humid weather water vapor may
condense on leaving the vent terminal. The effect
of such ‘water condensation’ must be considered.
The terminal must be located in a place not likely
to cause a nuisance.

27

Instructions for the installer

When using indoor air, LATTNER strongly recommends the
use of an indoor air filter.
This boiler requires adequate combustion air for ventilation
and dilution of flue gases.
Failure to provide adequate combustion air can result in unit
failure, fire, explosion, serious bodily injury or death.
Use the following methods to ensure adequate combustion
air is available for correct and safe operation of this boiler.

Important: Combustion air must be free of corrosive chemi­cals. Do not provide combustion air from corrosive environ­ments. Appliance failure due to corrosive air is not covered by
warranty.
Combustion air must be free of acid forming chemical such as
sulfur, fluorine and chlorine. These chemicals have been found
to cause rapid damage and decay and can become toxic when
used as combustion air in gas appliances. Such chemicals
can be found in, but not limited to bleach, ammonia, cat litter,
aerosol sprays, cleaning solvents, varnish, paint and air fre­sheners. Do not store these products or similar products in the
vicinity of this boiler.

3.19 - ROOM AIR SYSTEM

FOR INSTALLATION USING INDOOR
COMBUSTION AIR

Boiler designed to be connected to an open flue which will
terminate vertically through the roof. The combustion air is
withdrawn directly from the room where the boiler is installed.

The flue system must be installed in
accordance with the local and national
Standards.

Use only original LATTNER flue outlet systems, which are
provided from the follow manufacturer:

TABLE FLUE OUTLET SYSTEM

Damages caused by installation errors and for non­observance of the instructions given by the manufacturer
will invalidate all the supplier’s contractual or extra
contractual responsibilities.

If the boiler has to be replaced ALWAYS replace the flue
outlet system.

The boiler has been tested and approved with the terminals

distributed by LATTNER that comply the requirement s of ANSI
Z21.13 / CSA 4.9 for the following flue configurations.

Item
Decription

Concentic
extension

3.28 ft
Concentic

extension

1.62 ft
Elbow 90°

Elbow 45°

Horizontal
Flue terminal

Venting
terminal

Vertical
Flue
Terminal

Manufacturer

GROPPALLI

GROPPALLI

GROPPALLI

GROPPALLI

GROPPALLI

GROPPALLI

STABILE

Material

Stainless
Steel

Stainless
Steel

Stainless
Steel

Stainless
Steel

Stainless
Steel

Stainless
Steel

Stainless
Steel

Code
LATTNER

00362445

00362446

00362442

00362441

00362439

00362440

00362244

WARNING: for this type of connection the room must com­ply with the same installation regulations valid for open
chimney boilers.

The chimney must comply to the current regulations.

Flue outlet systems must be purchased
from the dealer of products LA TTNER.

28

Instructions for the installer

L min = 39.4‘‘ (1 m)
L max = 787.4‘‘ (20 m)

L

1

L2

L min = 39.4‘‘ (1 m)
L max = 787.4‘‘ (20 m)

L max = L1+L2

L max = L1+L2

L1

L2

Preliminary operations:
Fit the smoke evacuation pipe Ø 3.15‘‘ (80 mm), supplied in
the carton, as shown in the picture.

FLUE OUTLETS Ø 3.15‘‘ (80 mm)

The total allowed linear maximum length of the
smoke evacuation and air intake pipes, of Ø 3.15‘‘
(80 mm), is 787.4‘‘ (20 m), including one wide
radius curve and one evacuation terminal.

ATTENTION!
In the case in which danger of freezing subsists,
the insulation of the smoke evacuation pipe is
recommended on the whole length, in both
cases, outside or in the chimney.

ATTENTION!
For boiler have horizontal runs sloping
upwards not less than 1/4 in / ft (21 mm / m)
from the boiler to the vent terminal.

29

Instructions for the installer

Smoke evacuation by two separate ducts

Ø 3.15‘‘ (80 mm)

L min = 78.7‘‘ (2m)

39.37‘‘ (1 m) air intake + not less than 39.4 (1 m)
smoke evacuation

L max = 787.4‘‘ (20 m)

393.7‘‘ (10 m) air intake + 393.7‘‘ (10 m) smoke evacuation

L

1

L2

COMBINATION DIRECT VENT SYSTEM

Boiler with separate air inlet and products outlet. These ducts
can discharge into areas with different pressure.
The two terminals must not be fitted on to two opposite walls.

Boiler designed for connection to horizontal inlet and out- let
terminals, which admit fresh air to the burner and discharge
the products of combustion to the outside through concentric
or twin ducts.

The minimum distance between the inlet air duct and the flue
outlet duct must be of 9.8 in and both terminals must be posi­tioned within a 19.6 in square section.

3.20 - VENT AND AIR SUPPLY SYSTEM

FOR ORIZONTAL DIRECT VENT
SYSTEM

Smoke evacuation by two separate ducts

Ø 3.15‘‘ (80 mm)

L min = 78.7‘‘ (2m)

39.37‘‘ (1 m) air intake + not less than 39.37 (1 m)
smoke evacuation

L max = 787.4‘‘ (20 m)

393.70‘‘ (10 m) air intake + 393.7‘‘ (10 m) smoke evacuation

L1

L2

ATTENTION!
For boiler have horizontal runs sloping
upwards not less than 1/4 in / ft (21 mm / m)
from the boiler to the vent terminal.

30

Instructions for the installer

3.21 - ELECTRICAL CONNECTIONS

Regulations in force

The electrical connections to the boiler must be made in ac­cordance with all applicable
local codes and the latest revision of the NFPA 70: National
Electrical Code
Installations should also conform with C22.1 - Canadian
electrical code, part I (21st edition), safety standard for electri­cal installations if installed in Canada.

CAUTION

The boiler must be electrically grounded in ac­cordance with local codes, or in absence of lo­cal codes, with the National Electrical Code,
NFPA 70: National Electrical Code C22.1- Ca­nadian electrical code, part I (21st edition), sa-

fety standard for electrical installations
The gas, D.H.W. and the CH system pipes can­not be used as ground plates.

Ensure that the above safety electrical requirements subsist;
in case of doubt, ask for a professionally qualified technician
to check the appliance’s electrical system.

LA TTNER refuses responsibility for any damages arising from
failure to earth the boiler correctly.

It is necessary that a qualified technician verifies that the
electrical system is adequate to the appliance’s maximum
absorbed power, indicated on the data plate, verifying in
particular that the section of the system’s cables is suitable
to the appliance’s maximum absorbed power.

CAUTION

For the appliance’s general electrical supply the
use of adaptors, multiple sockets and/or
extension cords is strictly forbidden.
The use of any power supplied equipment
implies the observance of several fundamental
rules, such as:

- Do not touch the appliance with any wet part of your body
and/or barefooted;

- Do not pull the supply cables

- Do not expose the boiler to sunlight, rain, etc., unless it is
explicitly foreseen;

- Do not permit children or inexpert people to use the
appliance.

Mains electrical supply connection
120 V - 60 Hz

Power supply cord

The boiler is provided complete with a power supply cord
59‘‘ (1,5 m) long and with a cross section area of 3 x 16 AWG

The electric connections of the boiler are shown in the section
named “ACTUAL WIRING DIAGRAM” (paragraph 3.22)

WARNING!
We remind you that upstream of the electrical
connection, it will be necessary to foresee a
service relay (NOT SUPPLIED) which, when
the additional electrical safety devices (if
any) intervene, shuts down the electrical
supply to the on-off fuel valve fitted on the
gas supply circuit, but not to the boiler so as
to guarantee the running of the pump and
permit the boiler to cool down.

DANGER!
The electrical connections must be carried
out only by a qualified engineer.
Before carrying out the connections or any
other operation on the electrical parts,
always switch off and disconnect the
electricity supply and ensure yourself that it
cannot be accidentally turned on.

It is necessary to fit a double pole switch on
the electrical supply line, having a contact
separation in both poles, in an easy accessible
position in order to make quick and safe the
servicing operations.

FASTON BLOCKING
If necessary the faston can be disconnected by
slightly folding up, with a point, the blocking
tongue ‘’ Á. ‘’.

A

CAUTION

External connection board connections
WARNING

Danger of fatal accident due to electric shock.
120 VAC connections may be present on the
external connection board when power is sup­plied to the boiler.

- No changes may be made to the wiring of the
boiler.

- All connections should be designed in accor
dance with the applicable regulations.

- Label all wires prior to disconnection when
servicing controls. Wiring errors can cause im
proper and dangerous operation.

- Verify proper operation after operation servi
cing.

31

Instructions for the installer

Connection of the additional safety devices

- Gain access to the Y1 terminal board

- A Room Thermostat will be connected to the
terminals 1 and 2 after removal of the existing bridge
wire.

- For the Heating Controller connection use the

connecting terminals 3 and 4.

Room
thermostat

E8 heat ing
controller

CAUTION!
Switch off and disconnect the electricity

supply before carrying out any operations
on the electrical parts.

- For the connection remove the existing jumper.

CDS - 1
Prearrangement for the
connection of the
additional safety devices

LIGHTBLUE

LIGH TBLU E

LIGH TBLU E

For the connection of the E8
heating controller, to remove the
“bridge wire” existing between the
terminals 1 and 2.

Room thermostat and/or E8 heating controller connection

CAUTION
Switch off and disconnect the electricity

supply before carrying out any operations on
the electrical parts.

A hot water boiler installed above radiation
level or as required by the Autority having
jurisdiction, must be provided with a low water
cutoff devices either as a part of the boiler or at
the time of boiler installation.

32

Instructions for the installer

3.22 - WIRING DIAGRAM for ALKON 50

MDV = Motor 3 way valve
P SYST. = Pump system
SS = DHW sensor

Note: Any accessories shown in the drawn
are not available for this model of boiler

Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.

21

ORANGE +

BLACK (-)

BROWN (PWM)
BLUE (TACHO)

45

BLUE (N)

12

BROWN (L1)

3

RIL./REG.

ALIM.
120V

SRR

SR

BROWN

BROWN

BLUE

YELL/GREEN

E. RIV.

WHITE

BLACK

DK

BROWN

BLUE

BLUE

BLUE

BROWN

Fs1

BLACK
BLUE
BROWN
ORANGE

P

BLUE

BROWN

YELL-GREEN

GREEN
GREEN

WHITE

WHITE

WHITE

BROWN

BLUE

BROWN

GREEN

RED (CH)

WHITE (DHW)

IG

VM

L1

N

120 V - 60 Hz

SS

MDV

00333986

BLUE - N

BROWN - L

E. ACC

TR. ACC

BLUE
BROWN

RED

YEL

/

GREEN

VG

YEL/GREEN

OR

Only with

BROWN
BLUE

BLACK
WHITE

TL

TF

B

L

A

C

K

BLUEPFBLUE

CDS-1

YELL-GREEN

BROWN

BLUE

P

BOILER

SYSTEM

P

1 (NC)

BROWN

3 ( C )

WHITE

BLUE

= Minimum water pressure switch
= Ignition electrode
= Detection electrode
= Power switch On-Off
= Pump boiler (optional)
= CH sensor
= CH return sensor

= Limit thermostat
= Smoke thermostat (only pre-arran

g

ement)
= Ignition transformer
= Gas valve
= Modulating fan detection/adjustment

DK
E. ACC
E. RIV.
IG
P
SR
SRR
TL
TF
TR.ACC
VG
VM

CSD - 1
Prearra ngement for the
connection of the
additional safety devices

33

Instructions for the installer

WIRING DIAGRAM for ALKON 70

21

ORANGE +

BLACK (-)
BROWN (PWM)
BLUE (TACHO)

45

BLUE (N)

12

BROWN (L1)

3

RIL./REG.

ALIM.
120V

SRR

SR

BROWN

BROWN

BLUE

YELL/GREEN

E. RIV.

WHITE

BLACK

DK

BROWN

BLUE

BLUE

BLUE

BROWN

Fs1

BLACK
BLUE
BROWN
ORANGE

P

BLUE

BROWN

YELL-GREEN

GREEN
GREEN

WHITE
WHITE

WHITE

BROWN

BLUE

BROWN

IG

VM

L1

N

120 V - 60 Hz

BLUE - N

BROWN - L

E. ACC

TR. ACC

BLUE
BROWN

RED

YEL

/

GREEN

VG

YEL/GREEN

TL

TF

B

L

A

C

K

1 (NC)

BLUE

PF

BROWN

3 ( C )

WHITE

BLUE

BLUE

CDS-1

YELL-GREEN

BROWN

BLUE

P

BOILER

SYSTEM

P SYST. = Pump system

Note: Any accessories shown in the drawn
are not available for this model of boiler

= Minimum water pressure switch
= Ignition electrode
= Detection electrode
= Power switch On-Off
= Pump boiler
= CH sensor
= CH return sensor

= Limit thermostat
= Smoke thermostat (only pre-arran

g

ement)
= Ignition transformer
= Gas valve
= Modulating fan detection/adjustment

DK
E. ACC
E. RIV.
IG
P
SR
SRR
TL
TF
TR.ACC
VG
VM

CSD - 1
Prearra ngement for the
connection of the
additional safety devices

Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.

34

Instructions for the installer

3.23 - GENERAL LADDER DIAGRAM

L

N

AC/DC

CPU

P

F

G

120 V AC

15 kV

Fs1

FLAME

CAUTION HIGH VOLTAGE SPARK LEAD

SPARK

ROD

A8 - 1

IG

A

8 - 2

IG

A8 - 2

A

9 - 2

A

9 - 6

A

6 - 6

A

6 - 5

A

9 - 5

A

9 - 1

A

8 - 1

A3-5

SRR

RIBBON CABLE

A3

A3 6- A3-3

S

R

A3 4- A4-6PFA4-5 A4-4 A4-5TLA4-1

CDS-1

A2-3DKA2-1

888

DISPLAY

A1 - 4
A1 - 2

A1 - 1

A1 - 3

RL 4

RL 1

RL 2

RL 3

(*)

A4-4

A4-3

SL (**)

A

TTENTION

A

UTE TENSION CÂBLE D’ALLUMAGE

A4-2

35

Instructions for the installer

3.25 - FILLING THE SYSTEM

WARNING!

Do not mix the CH system’s water with anti­freeze or anti-corrosion solutions using wrong
concentrations! It could cause damage to the
washers and could provoke noise during
normal boiler operation.
LATTNER refuses all liability for injury to
persons, animals or damage to property
deriving from not having respected the above
mentioned recommendations.

Before filling the heating system, the complete system, inclu­ding all zones, must be thoroughly cleaned and flushed to
remove sediment.
Flush until clean water runs free of sediment. LATTNER sug­gests using an approved system cleaner to flush the system,
but not the boiler. Always use LATTNER approved antifree­zes. See the list at page 7.
Never use reverse osmosis, D.I., or distilled water for filling
the heating system.

WARNING!

Do not use petroleum-based cleaning or sea­ling compounds in the boiler system. Damage
of seals and gaskets in boiler and system could
occur, resulting in substantial property dama­ge.

The central heating installation needs to be fil­led with potable water.

Use only potable water or approved glycol for
filling the heating system.
When the water hardness of the filling water
exceeds > 8 gpg the water has to be treated
until below the maximum value of 8 gpg
The pH value of the installation water must be

between 6.5 and 8.5. Check the pH value using proper equi­pment or by having the water analyzed by a water treatment
company.
If pH differs from above, contact LATTNER engineering for
further assistance.
Failure to adhere to the water quality requirements will result
in a void of warranty.

Once all the connections are made, it is possible to fill the
circuit.
This operation has to be performed very carefully, by obser­ving the following steps (boiler in Off position):

- open the radiator bleeds and make ascertain the good
operation of the automatic air vent fitted in the boiler.

- open progressively the filling valve and make sure the
automatic air vent, in the system, work properly.

- close the bleeders of the radiators when water starts to
come out.

- control via manometer (Optional) that the water pressure
has reached a minimum value of 11,6/14,5 psi (0,8/1) bar

- close the filling valve and bleed again all the radiators.

- inspect for the soundness all the hydraulic connections.

- after the commissioning of the boiler and the reaching of
the normal operation temperature, switch off the operation
of the boiler and the pump and repeate the bleed opera­tion.

- let the installation cool down and, if necessary, add water
in order to reach the minimum presure of 11,6/14,5 psi
(0,8/1) bar

3.24 - STARTING UP: Filling and de-aerating

the boiler and installation

CAUTION
Observe the following rules of safety:

- All work on the unit must take place in a
dry environment.

- LATTNER units may never be in operation
without their housing, except in connection
with maintenance or adjustments.

- Never allow electrical or electronic
components to come into contact with
water.

NOTICE
Carry out the following tasks in connection
with maintenance, etc. to an already installed

unit:

- Shut down all programs

- Close the gas shut off valve

- Shut off the power at the main power switch

- Close the service valves (supply and return)

NOTICE
T ake note of the following when maintenance
or adjustments are needed:

- The unit must be able to function during these
activities; for this reason, the unit’s supply
voltage, gas pressure and water pressure
must be maintained. Ensure that this is not a
source of potential danger during these
activities.

WARNING
Following maintenance or other activities;
always check the installation of all

parts through which gas flows (with bubble
test using leak-search spray).

36

Instructions for the installer

37

Instructions for the installer

3.26 - INITIAL LIGHTING

PRELIMIARY CHECKS

CAUTION
The first ignition must be carried out by a
qualified technician. Failure to do so could
cause injury to persons, animals or damage
to property. LATTNER shall not be held liable
for any injury and/or damage.

Before lighting the boiler check that:

- the boiler installation has been carried out in accordance
with the specific Standards and regulations in force for
the gas part and for the electrical part;

- the air supply and the discharge of the products of
combustion are carried out in the correct way in
accordance to the specific Standards and regulations in
force;

- the gas supply system is correctly dimensioned for the
boiler’s output and is fitted with all the safety and control
devices prescribed by the regulations in force;

- the electrical supply must be 120 V - 60 Hz;

- the system has been filled with water (pressure
registered on the gauge 11,6/14,5 psi (0,8/1) bar with
pump not running);

- any on-off valves of the system are open;

- the mains supply gas corresponds to the one which the
boiler has been calibrated for: otherwise convert the boiler
to use the available gas (Using kit code and follow the
instruction “GAS CONVERSION”); this operation must be
carried out by a qualified technician in compliance to the
regulations in force;

- the gas supply cock is open;

- there are no gas leaks;

- the external mains supply switch is on;

- the system’s safety valve on the boiler is not blocked and
that it is connected to the sewage system;

- the condensate drain siphon has been filled with water;

DANGER!
Before commissioning the appliance fill the
siphon and check the correct drainage of the
condensate.
If the appliance is used with the condensate
drain siphon empty there could be danger of
intoxication resulting from the escape of flue
gasses.

- there are no water leaks;

- all the necessary ventilation conditions and minimum
clearance distances are guaranteed for subsequent
servicing.

LIGHTING AND SHUTTING DOWN PROCEDURES
For lighting and shutting down the boiler refer to the

“INSTRUCTIONS GUIDE FOR THE PERSON IN CHARGE OF
THE APPLIANCE”

Information to be passed on to the user.

The usert be instructed on the use and operation of the
boiler and in particular:

- Hand the booklet: “USER’S OPERATING
INSTRUCTIONS”, as well as all the other literature
relative to the appliance, and placed in the envelope
contained in the packaging, to the user.

The user must retain this literature for any future
reference.

- Inform the user of the importance of the air vents and of
the flue outlet system, stressing the fact that absolutely
no modification can be made.

- Inform theuser regarding the control of the system water
pressure and how to restore it to the correct value.

- Explain and demonstrate to the user the correct function
and adjustment of the temperature, thermostats and
radiators for the economic use of the system.

- Remind the user that a comprehensive service and the
measurement of the combustion efficiency should be
carried out regularly (as requested by the national law).

- If the appliance is sold or transferred to another owner
or if the present user moves home and leaves the
appliance installed, ensure yourself that the manual
always follows the appliance so that it can be consulted
by the new owner and/or installer.

38

Instructions for the installer

- Check that the boiler is connected to the electrical
supply; the green indicator led “Q” (

) on the control

panel must be illuminated.

- Create a request in CH by pressing key indicate.

- Turn the gas valve knob, in OFF position.

- After 1sec, boiler switch off,

LIGHT
BLUE

- Power on by switching ON-OFF switch

3.27 - TESTING THE IGNITION SAFETY

SHUT OFF DEVICE

Lock-out indicator
led illuminated
+ fault indicator led

- Press Reset Key will displayed the fault code LF (loss

of flame), the boiler will retry ignition cycle (7 seconds)
after which if was not removed the cause of the fault
(gas tap) the boiler will shut off.

39

Instructions for the installer

1

1

1

3.28 - BURNER ADJUSTMENT

WARNING!

All the instructions indicated below are for the
exclusive use of qualified LATTNER service
technicians or installers.

All the boilers are supplied already calibrated
and tested. If it is necessary to change the
calibration due to gas conversion or adaptation
to the mains supply system, the gas valve must
be re-calibrated.

A) Max output adjustment

- Connect a suitable C0

2

gas analyser to the sampling

point in the flue inlet/outlet terminal.

- Pressing simultaneously the keys + (plus) and –

(minus) for at least 3 seconds the boiler will operate
in the CH mode at the maximum output (led 1
illuminated).

- Check that the C0

2

values are within the values

indicated in the table “Burner pressures”

- If necessary correct the value by turning the adjustment

screw “A” in a CLOCKWISE direction to decrease the
value and in an ANTICLOCKWISE direction in order to
increase it.

B) Min output adjustment

- By pressing the key “- decrease” again the boiler will
operate at the minimum output (led 1 blinking).

MAXIMUM OUTPUT
ADJUSTMENT SCREW (A)

- To disenable the CHIMNEY SWEEPER MODE
press the keys + (increase) and – (decrease)
simultaneously (led 1 off).

- Check that the C0

2

values are within the values indicated

in the table “Burner pressures”

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

BLUE

YELLOW

LIGHT
BLUE

VIOLET

BLUE

YELLOW

40

Instructions for the installer

C) COMPLETION OF THE BASIC ADJUSTMENTS

- Check the C0

2

values at the minimum and maximum

outlet

- If necessary make the required adjustments

To ensure correct operation the C0

2

values
have to be adjusted with extreme care
respecting the values indicated in the table.

- Close the sampling test point in the flue inlet/outlet
terminal with the appropriate cap C.

MINIMUM OUTPUT
ADJUSTMENT
SCREW (B)

Tighten the maximum adjustment screw “A”
in a clockwise direction until you arrive to
the abutting end, than slacken for 7 turns.
Verify the boiler ignition; if the boiler goes
into lockout slacken the screw “A” again of
one turn, than retry the ignition. If the boiler
goes into lockout again, carry out the above
indicated operations until the boiler is
lighted.
At this point carry out the burner adjustment
as previously indicated.

- If necessary correct the value by turning the adjustment
screw “B” in a CLOCKWISE direction to increase the value
and in an ANTICLOCKWISE direction in order to decrease
it.

Type of
Gas

7 (1,74)

11 (2,74)

7 (1,74)

11 (2,74)

0.038 (1,07)

0.015 (0,42)

0.038 (1,07)

0.015 (0,42)

0.173 (4,91)

0.067 (1,90)

0.156 (4,42)

0.060 (1,71)

A (Natural)
E (Propan HD)

A (Natural)
E (Propan HD)

min
(FL)

ALKON 50

9.5

10.8

9.5

10.8

92
93

82
83

24
24

24
24

0.22 (5,6)

0.22 (5,6)

0.22 (5,6)

0.22 (5,6)

9.5

10.8

9.5

10.8

Start

output %

IG

40
50

40
50

Check the C0

2

levels often, especially at low flow rate

INJECTORS – PRESSURES

CO

2

level

(%)

min

CO

2

level

(%)

max

Fan speedSupply

pressure

in wc (kPa)

Minimum gas

consumption

ft3/hr (m3/hr)

Ø Mixer

injectors

Øin (mm)

max

(FH)

Maximum gas

consumption

ft3/hr (m3/hr)

V max

fun

FU

10
10

10
10

ALKON 70

FOR HIGH AL TITUDE

Type of
Gas

7 (1,74)

11 (2,74)

7 (1,74)

11 (2,74)

0.055 (1,56)

0.021 (0,60)

0.055 (1,56)

0.021 (0,60)

0.224 (6.35)

0.087 (2,46)

0.156 (5,72)

0.060 (2,21)

A (Natural)
E (Propan HD)

A (Natural)
E (Propan HD)

min
(FL)

9.5

10.8

9.5

10.8

81
80

73
72

21
21

24
24

0.35 (9,0)

0.35 (9,0)

0.22 (5,6)

0.22 (5,6)

9.5

10.8

9.5

10.8

Start

output %

IG

50
50

50
50

CO

2

level

(%)

min

CO

2

level

(%)

max

Fan speedSupply

pressure

in wc (kPa)

Minimum gas

consumption

ft3/hr (m3/hr)

Ø Mixer

injectors

Øin (mm)

max

(FH)

Maximum gas

consumption

ft3/hr (m3/hr)

V max

fun

FU

12
12

12
12

FOR HIGH AL TITUDE

41

Instructions for the installer

3.29 - PROGRAMMING OF THE OPERATING PARAMETERS

WARNING! THESE OPERA TIONS ARE ACCESSIBLE TO TRAINED INST ALLERS AND SERVICE ENGINEERS
ONL Y FOR CHANGING THE P ARAMETER SETTINGS

BURNER MODULA TION LEVEL IN IGNITION (IG)

By pressing the YELLOW key you have access to the first
adjustable parameter BURNER MODULATION LEVEL IN

IGNITION (IG)

(Operation A)

By pressing the YELLOW key again the standard parameter
setting is displayed.

(Operation B)

By pressing the keys + (increase) or – (decrease) a number
of times the parameter can be changed.

(Operation C)

After setting the desired value pressing the YELLOW key stores
this new value in the memory.

Press the YELLOW key and the LIGHT BLUE key simultane­ously to enter in the service mode SE and change the values
of the pre-set operating parameters.

PUMP OVERRUN

Continue to change to the parameters by pressing the – key
(decrease).
The successive parameter which can be changed is: PUMP

OVERRUN (Po).

Repeat the operations A-B-C for setting the desired value
from 1 to 10 minutes.

Standard setting: 5 minutes

CAUTION!
DO NOT CHANGE THE PARAMETER

.

Standard Natural Gas setting

40 % 50 %

Standard LPG setting 50 % 50 %

ALKON 50

70

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

42

Instructions for the installer

SETTING OF THE MINIMUM HEA TING TEMPERA TURE

Continue to change to the parameters by pressing the – key
(decrease).
The successive parameter which can be changed is: SETTING

OF THE MINIMUM HEA TING TEMPERATURE (HL).

Repeat the operations A-B-C for setting the desired value
from 68 to 140 °F (20 to 60°C)

Standard setting: 95° F (35°C)

SETTING OF THE MAXIMUM HEATING TEMPERATU­RE

Continue to change to the parameters by pressing the – key
(decrease).
The successive parameter which can be changed is: SETTING

OF THE MAXIMUM HEA TING TEMPERATURE (HH

Repeat the operations A-B-C for setting the desired value
from 149 to 185 °F (65 to 85°C)

Standard setting: 176° F (80°C)

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

3.30 - VARIATION OF INPUT RANGE FOR
HIGH ALTITUDE

It is necessary adjust nominal heat input by reducing
the fan speed.

Modify the parameter FH from the boiler panel board:
See factory parameter (supplied separately and modifia-
ble only with access code).

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

Insert
Code

Choose

LIGHT
BLUE

VIOLET

YELLOW

BLUE

Reach the FH parameter by pressing key - several time

LIGHT
BLUE

VIOLET

YELLOW

BLUE

(Operation A)

By pressing the YELLOW key again, the standard parameter
setting is displayed.

(Operation C)

After setting the desired value pressing the YELLOW key stores
this new value in the memory.

See value of parameter FH at table
INJECTOR - PRESSURES page 38.

(Operation B)

By pressing the keys + (increase) or – (decrease) a number
of times the parameter can be changed.

43

Servicing schedule

CAUTION
To ensure the continued safe and efficient
operation of the boiler it is highly
recommended that it is checked at regular
intervals and serviced when necessary, and
that only original spare parts are used.

Regular attention will prolong the life of the
boiler.

DANGER
If the boiler is not checked and serviced
regularly it could cause material and personal
damages.

For this reason LATTNER recommends that a servicing
contract should be made with our authorized After Sales
Service Assistance Centre.

The boiler must have regular maintenance and cleaning in
order to ensure reliable and efficient operation. Regular
attention will prolong the life of the boiler.

The frequency of servicing will be determined by the service
engineer and will depend on the appliance’s state of condition.

4

INSPECTION AND SERVICING SCHEDULE

4.1 - INSTRUCTIONS FOR INSPECTION

AND SERVICING

CAUTION
To ensure a long life to all your boiler
components and in order not to alter the
conditions of the approved product, only
original LATTNER spare parts must be used.

Before servicing always carry out the following steps:

- Disconnect the mains electricity supply.

- Separate the appliance from the electrical supply by me-

ans of a separating device with an opening contact of at
least 3 mm (for example safety devices or power switches)
and ensure yourself that it cannot be accidentally reinser­ted.

- Close the on-off valve fitted upstream of the boiler.

- If necessary, and in function of the type of work to be car-

ried out, close any on-off valves fitted on the CH flow and
return pipes, as well as the cold water inlet valve.

- Remove the appliance’s front panel.

After having carried out all the necessary maintenance work
always follow these steps:

- Open the CH flow and return valves as well as the cold

inlet valve (if previously closed),

- Purge and, if necessary, proceed with restoring the hea-

ting system’s pressure until a pressure of 0,8/1 bar is rea­ched.

- Open the on-off gas cock.

- Reconnect the appliance to the electrical supply and switch

on the mains electrical supply.

- Test for gas soundness, on the gas side and on the water

side.

- Replace the appliance’s front panel.

IMPORTANT:

After having performed the maintenance of
the appliance remember to reset the counter
by selecting “Cr” from the parameters menù
and introducing the relevant resetting code.

Relation between the temperature (°C) and the nom.
resistance (Ohm) of the heating sensor SR and the return
heating sensor SRR.

T° F (C) 32 (0) 33.8 (1) 35.6 (2) 37.2 (3) 39.2 (4) 41 (5) 42.8 (6) 44.6 (7) 46.4 (8) 48.2 (9)

32 (0) 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987
50 (10) 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153
68 (20) 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466
86 (30) 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584

104 (40) 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768
122 (50) 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596
140 (60) 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824
152 (70) 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304
176 (80) 1263 1222 1183 1146 1110 1075 1042 1010 979 949
194 (90) 920 892 865 839 814 790 766 744 722 701

T ABLE OF THE RESISTANCE VALUES IN FUNCTION OF THE HEATING SENSOR (SR) AND RETURN HEATING SENSOR
TEMPERA TURE (SRR)

Ex: At 101 °F (25°C), the nominal resistance is 10067 Ohm

At 194 °F (90°C), the nominal resistance is 920 Ohm

44

Servicing schedule

4.2 - PERIODIC EXAMINATION OF VENTING
SYSTEM

4.3 - PROPER PROCEDURE FOR
CLEANING FLUE GAS
PASSAGEWAYS

(After 1 year maintenance)

Verify that the system of flue and chimney are
unobstructed.

4.4 - PROPER PROCEDURE FOR
CLEANING THE BURNER

The inspection of the boiler and venting system should be
done every 1 years and full maintenance every 2 years,
whichever occurs first. When doing this the circumstances of
the boiler’s location must be taken into account. From this
one can determine whether to deviate from this advice.

Please contact LATTNER for further guidance on the
frequency and service requirements. Contact details can
be found on the back page of this manual.

V erify that the air ventilation system, air intake and air
intake pipes are unobstructed.

(After 1 year maintenance)

• Perform cleaning of the burners only by blowing, with com-

pressed air, acting from the “side flame”

• Verify visually the state of the spot weldings of the L profiles

and the burner mesh.

Compressed air

• Wash with water the combustion chamber, avoiding to
wet the electrical harness
During this operation it will be necessary to ascertain
that the condensate drain pipe is free, so that the washing
water does not come out from the inspection hole.

• Blow the combustion chamber with compressed air, trying
to remove all the dirt still fixed to the fins.

• Once the washing of the aluminium sections is finished,
make sure the siphon for the evacuation of the conden­sate is free: if necessary clean it.

45

Servicing schedule

4.5 - VISUAL INSPECTION OF THE FLAME

4.6 - PROPER REASSEMBLY AND
RESEALING OF THE VENT-AIR
INTAKE SYSTEM

(2 and 4 yearmaintenance)

The burner must flame evenly over the entire surface when
operating correctly. The flame must burn with a clear, ORAN­GE, stable flame.

Check the flame through the inspection glass

The flame pattern should be as shown in the figures below.

SATISFACTORY

ORANG E FLAME

FLAME:
YELLOW = CO2 HIGH NOT SATISFACTORY
BLUE = CO2 LOW NOT SATISFACTORY
ORANGE = OK SATISFACTORY

After removing, inspected and possibly cleaned, Flue pipes
and air intake, replace the tubes correctly.

Attention to the sense of double lip seals.

DOUBLE LIP SEAL

A

A

46

Servicing schedule

4.7 SEALING GASKET BETWEEN
DISTRIBUTOR AND BOILER BODY

DANGER!
It is absolutely necessary to replace the
gasket at any time the inspection or mainte­nance is made on the burner.

When refitting the mixer tighten the nuts
progressively and in crossed way, by using a
dynamometric wrench adjusted at 7.37 lbf x ft
(10 Nm).

Mixer

Gasket
between
mixer and
boiler body.

Burner

Body

4.6 CLEANING THE CONDENSATE DRAIN
SIPHON

In order to check and clean the siphon carry out the following
steps:

- unscrew the plastic nuts (1) and (2) and to remove the

siphon;

- Verify if there are any deposits flush them out with clean

water;

- reassemble the siphon in reverse order.

DANGER
Before commissioning the appliance fill the
siphon via the filling hole and check the
correct drainage of the condensate.
If the appliance is used with the condensate
drain siphon empty, the combustion
adjustments could result completely wrong.
Furthermore this could lead to danger of
intoxication following the escape of flue
gasses.

1

2

47

Fault finding

Description: Failure of the heating return sensor
(SRR)

Corrective action: Check the efficiency of the
sensor and/or wiring

Description: Over high temperature detected by
the heating sensor (SR) >203°F (>95°C)

Corrective action: Check the system’s water
circulation

Description: Loss of flame signal during boiler
operation

Corrective action: Press the reset key on the panel

5

FAULT FINDING

2

1

3

5.1 - ERROR CODES

The boiler is fitted with an integrated diagnostic readout which,

in case of malfunction, consents the immediate individuation
of the type of fault directly on the control panel display

In the following fault finding table our purpose is to give some
technical information regarding the solutions to any problems
which could occur during boiler operation or commissioning
of the boiler.

When the fault signalling led (1) is on, press the LIGHT BLUE
key (2) to check the error code on the display (3).

Code:

Description: Mains voltage < 96 Vac

Corrective action: Check that the mains voltage
is <96 Vac, if the mains voltage is correct replace
the control board.

Code:

Description: Insufficient gas pressure

Corrective action: Check the pressure; if the
pressure is correct check the efficiency of the gas
pressure switch and/or the wiring.

Code:

Description: Difference between the heating
temperature sensor (SR) and the heating return
sensor (SRR) too high

Corrective action: Check the installation

Code:

Code:

Code:

Code:

Description: No flame detected during the ignition
phase.

Corrective action: Press the reset key on the
control panel

Code:

Description: Low water pression
Corrective action: Fill-up the water circuit

Code:

Description: Modulating fan failure

Corrective action: Check the fan’s wiring

Code:

Description: Modulating fan failure

Corrective action: Check the fan’s wiring

Code:

Description: Main heat exchanger frozen

Corrective action: Carefully de-frost the exchanger

Code:

Description: Intervention of the high limit
thermostat (TL)

Corrective action: Press the reset key on the
control panel

LIGHT
BLUE

VIOLET

YELLOW

BLUE

48

Fault finding

The boiler has an integrated system that, after 15.000
ignitions (3 value displayed x 5000) Value switching On or

3.000 (3 value displayed x 1000) hours of operation of the
burner, provides to signal that the boiler needs
maintenance.

Such information is indicated on the display by the lighting

of the code .

The flashing of the code doesn’t inhibit the
normal operation of the boiler.

Service the appliance and subsequently reset the counter
by selecting “Cr” from the parameters menù and
introducing the relevant resetting code.

5.2 - REQUEST OF MAINTENANCE

Code:

Code:

Description: Alteration of the operating
parameters caused by EMC disturbances

Corrective action: Restore the factory parameters

Code:

Description: Flame signal detected before the
ignition cycle

Corrective action: Disconnect the detection
electrode’s wire from the control board; if the error
code disappears replace the cable, otherwise
replace the control board.

Code:

Description: Flame detected after burner OFF

Corrective action: Disconnect the gas valve’s wire
from the control board; if the error code
disappears replace the control board, otherwise
replace the gas valve.

Code:

Description: Internal failure

Corrective action: Replace the control board

Description: Heating sensor failure

Corrective action: Check the sensor’s efficiency
and/or wiring

Code:

Description: Common chimney obstruction
Corrective action: Verify the chimney

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

LIGHT
BLUE

VIOLET

YELLOW

BLUE

Insert
Code

Confirm (yellow)
to reset value

Choose

49

Spare parts

ALKON 50

13

36

37

41

39

38

3

9

33

23

31

43

20

10

32

12

1

18

2

14

16

2

25

4

22

26

4

4

4

27

28

17

8

21

6

29

7

35

6

39

11

24

42

5

15

44

44

34

40

45

50

Spare parts

ALKON 70

13

36

37

41

39

38

3

9

33

23

31

43

20

10

32

12

1

18

2

14

16

2

25

4

22

4

27

28

17

8

21

6

6

30

39

11

24

42

5

15

4

26

4

35

44

44

34

45

40

51

Spare parts

Pos. Code Description

Spare parts list

1 95000023 Assorted gasket

2 95000426 Gas valve gasket (10 pcs.)

3 95000610 Grommet (6 pcs.)

4 95000657 Silicon pipe 4x8

5 95000679 Sight glass

6 95000680 CH flow sensor

7 95000781 Safety valve 6 bar

8 95000936 Heat exchanger Alkon 50/70

9 95000933 PCB Alkon 70

95000934 PCB Alkon 50

10 951000105 Dash board Alkon 70

951000104 Dash board Alkon Alkon 50

11 95212123 RH casing

12 95212125 Front casing

13 95212658 LH casing

14 95250489 Fan seal

15 95251384 Ignition electrode

16 95251500 Burner seal

17 95251502 Burner

18 95260588 Automatic air vent

20 95261102 Switch

21 95261494 Overheat thermostat 203°F (95°C)

22 95261988 3.15’’ (80mm) seal (2 pcs.)

23 95261999 Cover protection switch

24 95262087 3.15’’ (80mm) seal

25 95262128 Gas valve

26 95263579 Ignition transformer

27 95263551 Fan Alkon 70

95263552 Fan Alkon 50

28 95262451 Mixer Alkon 70

95262789 Mixer Alkon 50

29 95262604 Low water switch

30 95263555 Pump GRUNFDFOS UPS 26-99 FC

31 95310239 Display case

32 95310726 Fascia board

33 95310885 Programming keys

34 95263580 Gas tap 3/4"NPT

35 95263581 Condensate trap

36 95600402 Wiring VM R – TL

37 95600403 Wiring SR – SRR

38 95600406 Wiring ALIM. 120V

39 95600405 Wiring E. RIL.

40 95603418 Smoke Pressostat

41 95600407 Wiring T.ACC.-VG-VM(A)-P (Alkon 70)

95600404 Wiring T.ACC.-VG-APM-VM(A) Alkon 50

42 95600377 Ignition lead

43 95630163 Display board

44 95251826 Adapter F 1" 1/4 GAZ - 1" 1/4 NPT

45 95251827 Adapter F 3/4" GAZ - 3/4" NPT

LATTNER declines every responsibility for the possible inaccuracies if owed to errors of
transcript or press. Also reserves the right to bring those changes that it will hold
necessary to it own products or profits, without jeopardizing its essential characteristi­cs.

Lattner Boiler Mfg. Co.

1411 9th St. S.W. - P.O. Box 1527 - Cedar Rapids, IA 52404

319 - 366 - 0778 - 800 - 345 - 1527 - Fax: 319 - 366-0770

www.lattner.com

®

LATTNER