Mark Infra HT.2 User manual

MARK BV -The Netherlands
Beneden Verlaat, 87 – 89 Phone [phone] Web page www.mark.nl
9645 – BM Veendam Fax [phone] E-mail [email protected]
Luminous Infra-red Gas Heaters
MANUAL for INSTALLATION,
RUNNING and MAINTENANCE
“Infra HT.2” and “Infra HT.2 eco”
“Infra HT.2 PIEZO” and “Infra HT.2 eco PIEZO”
“Infra HT.2 DS”

page 2
CONTENT
For Your safety 2
Introduction / before starting installation 3
Plate label 4
Warrenty terms 4
Technical data 5
. heaters Infra HT.2 and Infra HT.2 eco 5
. heaters Infra HT.2 PIEZO and Infra HT.2 eco PIEZO 6
. heaters Infra HT.2 DS 7
Installation 8
. ventilation 8
. positioning 9 and 10
. minimum distance to people 11
. minimum distance to inflammable surfaces 12
. gas connection 13
. SIT control unit, electric connection 14
. SIT control unit, wiring diagram ON-OFF version 15
. SIT control unit, H / L version 16 and 17
. SIT control unit, wiring diagram H / L version 18
Put in opeartion and First Start-up 19
. heaters Infra HT.2, Infra HT.2 eco and Infra HT.2 DS 20
. heaters Infra HT.2 PIEZO and Infra HT.2 eco PIEZO 21
Maintenance and Annual Check 22
. nozzle replacement 23
. trouble shooting 24
CE certificate 25 and 26
Service sheet 27
FOR YOUR SAFETY
IMPORTANT: heaters MUST NOT be used in domestic environments. This unit will be
devoted only to the use for which it was expressly provided, all other uses will be
considered improper and therefore dangerous.
IMPORTANT : heaters MUST NOT be used in ambients with inflamable materials,
liquids or vapours : non-compliance with these requirements may be cause of death, injury
to persons or damage to things.
In case of gas smell : vent the ambient, do not start apparatus or electric
switches, leave the building; then contact gas company and follow their
instruction; if not possible, contact Firemen

page 3
GENERAL INSTRUCTIONS for INSTALLER,
USER and MAINTENANCE PERSONNEL
Thank you for having chosen MARK BV products !!! We are pleased to have You among
our Customers, and we do think that use of our heaters will be fully satisfactory. To keep
heaters perfectly working and safe, we ask you to follow the instructions of this handbook and
to have all installation and maintenance operations carried out only by skilled personnel. In
case of non-compliance with the following instructions, the warranty covering the
products will be null and void.
IMPORTANT!!! This manual is an integral and essential to the product and must be delivered
to the user. Please read the warnings contained in the manual before starting the
installation as provide important information concerning the safety of installation, use and
the necessary maintenance operations to be conducted over MARK BV heaters. Store
carefully the manual for further consultations.
Installation should be done in accordance with the Regulations in force, as instructed by the
Manufacturer and by professionally qualified staff; for professionally qualified staff means that
having specific technical competence in the field of components plants and, in particular, the
Technical Service Centres authorized by MARK BV. These devices must be installed only in
premises with a sufficient ventilation. An incorrect installation can cause damage to
people, animals and things, for which the Manufacturer is not responsible.
After you have removed any element of packing, ensure the integrity of the contents; in case
of doubt not use the equipment and contact the Manufacturer. The elements of packaging are
potentially dangerous and therefore should not be left within the reach of children and must be
disposed of according to regulations.
In case of failure and/or malfunction of the appliance, turn it off refraining from any attempt to
repair or direct intervention; the eventual repair of products MARK BV should be performed
only by an authorized Service Center by the Manufacturer using only original spare parts. In
each case, call professionally qualified staff.
To ensure the efficiency of the appliance and for its proper functioning periodic maintenance is
essential, performed by professionally qualified personnel, following the directions of
Manufacturer. Before carrying out any operation or maintenance of cleanliness, wait for the
unit is cold, disconnect the unit from the main power supply acting on the plant
switch, close gas supply acting on cut-off devices. If the unit is equipped with accessories
or modification kits (including electric) must be used genuine spare parts and accessories.
Failure to comply with the directions above may jeopardize the safety of the appliance.
When you decide to stop using the apparatus, will render harmless all parties that may be a
source of potential danger. If the unit should be sold or transferred to another owner, always
make sure this manual will accompany the equipment so that it can be consulted by the new
user and / or maintainer.
It is excluded any contractual liability and extra-contractual the Manufacturer for damage
caused by errors in the installation and use, and from non-compliance with the instructions
given by the Manufacturer. The installation and maintenance must be carried out in
accordance with regulations in the country of installation and the state of theart.

page 4
Plate label
Each unit is delivered complete with a plate of technical data, do not removable and placed at
the head of the heater.
note-A1 apparatus, gas categoryII 2L3B
Plate label (exemp le : Infra HT 16.2 eco, G25 natural gas)
Warrenty
MARK BV guarantees its products, whether installed by authorized personnel, for a period of 12
months from the date of the first start-up and no later than 18 months from the date of sale.
The warranty does not cover the components supplied by third parties, these are subject to
the conditions of the original warranty.
The guarantee is only the free supply on Ex-Works basis, of parts with manufacturing or
workmanship defects.
The guarantee does not cover disadvantages due to carelessness, incorrect setting, misuse of
the unit or fortuitous accidents, and not dependent on imperfection processing or defective
materials, and those due to dismantling or change without prior authorization from MARK BV.
The proper functioning of the apparatus depends on a proper installation and an start-up.
Failure to comply with these rules immediately involves the decay of the guarantee, and
therefore of responsibility by the manufacturer.

page 5
TECHNICAL DATA
series“Infra HT.2” and “Infra HT.2 eco”
Model, series Infra HT.2 .4.2 .6.2 .8.2 .10.2 .12.2 .16.2 .10+10.2 .12+12.2 .16+16.2
Weight, series Infra HT.2
(kg)
13
16
19
21
25
31
37
44
52
Model, series Infra HT.2 eco .4.2 e .6.2 e .8.2 e .10.2 e .12.2 e .16.2 e .10+10.2 e .12+12.2 e .16+16.2 e
Weight, series Infra HT.2 eco
(kg)
8 10 12 14 17 21 29 34 40
Number of ceramic plates
n°
4 6 8 10 12 16 20 24 32
Electric feeding 230 Volt - single phase - 50 Hz
NOx class 4 4 4 4 4 4 4 4 4
GAS G20
Heat input MAX (Hs)
(kW)
7,2 9,6 16,1 18,3 22,2 26,0 36,6 44,4 52,0
Heat input MAX (Hi)
(kW)
6,5
8,6
14,5
16,5
20,0
23,4
33,0
40,0
46,8
Heat input MIN (Hs)
(kW)
5,4 7,2 12,1 13,8 16,7 19,5 27,6 33,4 39,0
Heat input MIN (Hi)
(kW)
4,9 6,5 10,9 12,4 15,0 17,6 24,8 30,0 35,2
GAS supply pressure
(mbar)
20,0 20,0 20,0 20,0 20,0 20,0 20,0 20,0 20,0
NOZZLE pressure MAX
(mbar)
15,5
14,0
14,0
15,0
16,0
14,0
15,0
16,0
14,0
NOZZLE pressure MIN
(mbar)
8,5
7,5
8,0
9,0
9,5
8,0
9,0
9,5
8,0
Gas consumption MAX
(Sm
3
/h)
0,69 0,91 1,53 1,75 2,12 2,48 3,50 4,24 4,96
Gas consumption MIN
(Sm
3
/h)
0,52 0,69 1,15 1,31 1,59 1,86 2,62 3,18 3,72
Nozzle diameter (mm) 2,10 2,45 3,10 3,30 3,50 3,90 2 x 3,30 2 x 3,50 2 x 3,90
GAS G25
Heat input MAX (Hs)
(kW)
7,2 9,6 16,1 18,3 22,2 26,0 36,6 44,4 52,0
Heat input MAX (Hi)
(kW)
6,5 8,6 14,5 16,5 20,0 23,4 33,0 40,0 46,8
Heat input MIN (Hs)
(kW)
5,4 7,2 12,1 13,8 16,7 19,5 27,6 33,4 39,0
Heat input MIN (Hi)
(kW)
4,9
6,5
10,9
12,4
15,0
17,6
24,8
30,0
35,2
GAS supply pressure
(mbar)
25,0
25,0
25,0
25,0
25,0
25,0
25,0
25,0
25,0
NOZZLE pressure MAX
(mbar)
13,7 14,0 14,5 16,0 16,0 14,0 16,0 16,0 14,0
NOZZLE pressure MIN
(mbar)
8,3 7,5 8,5 9,5 9,5 8,0 9,5 9,5 8,0
Gas consumption MAX
(Sm
3
/h)
0,80 1,06 1,78 2,03 2,46 2,88 4,06 4,92 5,76
Gas consumption MIN
(Sm
3
/h)
0,60
0,80
1,34
1,53
1,85
2,17
3,06
3,70
4,34
Nozzle diameter
(mm)
2,30 2,70 3,40 3,60 3,80 4,30 2 x 3,60 2 x 3,80 2 x 4,30
GAS G30
Heat input MAX (Hs)
(kW)
7,0 9,3 13,5 17,9 21,7 25,4 35,8 43,4 50,8
Heat input MAX (Hi)
(kW)
6,5
8,6
12,5
16,5
20,0
23,4
33,0
40,0
46,8
Heat input MIN (Hs)
(kW)
5,3 7,0 10,2 13,4 16,3 19,1 26,8 32,6 38,2
Heat input MIN (Hi)
(kW)
4,9 6,5 9,4 12,4 15,0 17,6 24,8 30,0 35,2
GAS supply pressure
(mbar)
30,0 30,0 30,0 30,0 30,0 30,0 30,0 30,0 30,0
NOZZLE pressure MAX
(mbar)
28,2
28,0
28,0
28,5
28,1
27,5
28,5
28,1
27,5
NOZZLE pressure MIN
(mbar)
16,5
16,0
15,5
16,0
16,0
16,5
16,0
16,0
16,5
Gas consumption MAX
(kg/h)
0,51 0,68 0,99 1,30 1,58 1,84 2,60 3,16 3,68
Gas consumption MIN
(kg/h)
0,39 0,51 0,74 0,98 1,18 1,39 1,96 2,36 2,78
Nozzle diameter (mm) 1,30 1,50 1,80 2,10 2,30 2,45 2 x 2,10 2 x 2,30 2 x 2,45
GAS G31
Heat input MAX (Hs)
(kW)
7,0 9,3 13,5 17,9 21,7 25,4 35,8 43,4 50,8
Heat input MAX (Hi)
(kW)
6,5 8,6 12,5 16,5 20,0 23,4 33,0 40,0 46,8
Heat input MIN (Hs)
(kW)
5,3 7,0 10,2 13,4 16,3 19,1 26,8 32,6 38,2
Heat input MIN (Hi)
(kW)
4,9
6,5
9,4
12,4
15,0
17,6
24,8
30,0
35,2
GAS supply pressure
(mbar)
37,0 37,0 37,0 37,0 37,0 37,0 37,0 37,0 37,0
NOZZLE pressure MAX
(mbar)
36,2 35,7 35,7 36,2 36,2 35,7 36,2 36,2 35,7
NOZZLE pressure MIN
(mbar)
22,0 20,0 20,0 20,0 20,0 20,5 20,0 20,0 20,5
Gas consumption MAX
(kg/h)
0,50
0,67
0,97
1,28
1,55
1,82
2,56
3,10
3,64
Gas consumption MIN
(kg/h)
0,38
0,50
0,73
0,96
1,16
1,37
1,92
2,32
2,74
Nozzle diameter
(mm)
1,30 1,50 1,80 2,10 2,30 2,45 2 x 2,10 2 x 2,30 2 x 2,45

page 6
series “Infra HT.2 PIEZO” and “Infra HT.2 eco PIEZO”
Model, series Infra HT.2 PIEZO .4.2 PIEZO .6.2 PIEZO .8.2 PIEZO
Weight, series Infra HT.2 PIEZO
(kg)
13
16
19
Model, series Infra HT.2 eco PIEZO .4.2 eco PIEZO .6.2 eco PIEZO .8.2 eco PIEZO
Weight, series Infra HT.2 eco PIEZO
(kg)
8 10 12
Number of ceramic plates
n°
468
Electric feeding NO NO NO
NOx class 444
GAS G20
Heat input MAX (Hs)
(kW)
7,2 9,6 16,1
Heat input MAX (Hi)
(kW)
6,5
8,6
14,5
Heat input MIN (Hs)
(kW)
---
Heat input MIN (Hi)
(kW)
---
GAS supply pressure
(mbar)
20,0 20,0 20,0
NOZZLE pressure MAX
(mbar)
15,5
14,0
14,0
NOZZLE pressure MIN
(mbar)
-
-
-
Gas consumption MAX
(Sm
3
/h)
0,69 0,91 1,53
Gas consumption MIN
(Sm
3
/h)
---
Nozzle diameter (mm) 2,10 2,45 3,10
GAS G25
Heat input MAX (Hs)
(kW)
7,2 9,6 16,1
Heat input MAX (Hi)
(kW)
6,5 8,6 14,5
Heat input MIN (Hs)
(kW)
---
Heat input MIN (Hi)
(kW)
-
-
-
GAS supply pressure
(mbar)
25,0
25,0
25,0
NOZZLE pressure MAX
(mbar)
13,7 14,0 14,5
NOZZLE pressure MIN
(mbar)
---
Gas consumption MAX
(Sm
3
/h)
0,80 1,06 1,78
Gas consumption MIN
(Sm
3
/h)
-
-
-
Nozzle diameter
(mm)
2,30 2,70 3,40
GAS G30
Heat input MAX (Hs)
(kW)
7,0 9,3 13,5
Heat input MAX (Hi)
(kW)
6,5
8,6
12,5
Heat input MIN (Hs)
(kW)
---
Heat input MIN (Hi)
(kW)
---
GAS supply pressure
(mbar)
30,0 30,0 30,0
NOZZLE pressure MAX
(mbar)
28,2
28,0
28,0
NOZZLE pressure MIN
(mbar)
-
-
-
Gas consumption MAX
(kg/h)
0,51 0,68 0,99
Gas consumption MIN
(kg/h)
---
Nozzle diameter (mm) 1,30 1,50 1,80
GAS G31
Heat input MAX (Hs)
(kW)
7,0 9,3 13,5
Heat input MAX (Hi)
(kW)
6,5 8,6 12,5
Heat input MIN (Hs)
(kW)
---
Heat input MIN (Hi)
(kW)
-
-
-
GAS supply pressure
(mbar)
37,0 37,0 37,0
NOZZLE pressure MAX
(mbar)
36,2 35,7 35,7
NOZZLE pressure MIN
(mbar)
---
Gas consumption MAX
(kg/h)
0,50
0,67
0,97
Gas consumption MIN
(kg/h)
-
-
-
Nozzle diameter
(mm)
1,30 1,50 1,80

page 7
series “Infra HT.2 DS”
Model Infra HT.2 DS 4.2 DS 6.2 DS 8.2 DS 10.2 DS 12.2 DS
Number of ceramic plates
n°
4 6 8 10 12
Electric feeding 230 Volt - single phase - 50 Hz
Weight, series Infra HT.2 DS
(kg)
11 13 15 17 19
NOx class 44444
GAS G20
Heat input MAX (Hs)
(kW)
7,2 9,6 16,1 18,3 22,2
Heat input MAX (Hi)
(kW)
6,5 8,6 14,5 16,5 20,0
Heat input MIN (Hs)
(kW)
5,4
7,2
12,1
13,8
16,7
Heat input MIN (Hi)
(kW)
4,9 6,5 10,9 12,4 15,0
GAS supply pressure
(mbar)
20,0 20,0 20,0 20,0 20,0
NOZZLE pressure MAX
(mbar)
15,5 14,0 14,0 15,0 16,0
NOZZLE pressure MIN
(mbar)
8,5
7,5
8,0
9,0
9,5
Gas consumption MAX
(Sm
3
/h)
0,69 0,91 1,53 1,75 2,12
Gas consumption MIN
(Sm
3
/h)
0,52 0,69 1,15 1,31 1,59
Nozzle diameter (mm) 2,10 2,45 3,10 3,30 3,50
GAS G25
Heat input MAX (Hs)
(kW)
7,2 9,6 16,1 18,3 22,2
Heat input MAX (Hi)
(kW)
6,5 8,6 14,5 16,5 20,0
Heat input MIN (Hs)
(kW)
5,4 7,2 12,1 13,8 16,7
Heat input MIN (Hi)
(kW)
4,9
6,5
10,9
12,4
15,0
GAS supply pressure
(mbar)
25,0 25,0 25,0 25,0 25,0
NOZZLE pressure MAX
(mbar)
13,7 14,0 14,5 16,0 16,0
NOZZLE pressure MIN
(mbar)
8,3 7,5 8,5 9,5 9,5
Gas consumption MAX
(Sm
3
/h)
0,80
1,06
1,78
2,03
2,46
Gas consumption MIN
(Sm
3
/h)
0,60 0,80 1,34 1,53 1,85
Nozzle diameter (mm) 2,30 2,70 3,40 3,60 3,80
GAS G30
Heat input MAX (Hs)
(kW)
7,0
9,3
13,5
17,9
21,7
Heat input MAX (Hi)
(kW)
6,5 8,6 12,5 16,5 20,0
Heat input MIN (Hs)
(kW)
5,3 7,0 10,2 13,4 16,3
Heat input MIN (Hi)
(kW)
4,9 6,5 9,4 12,4 15,0
GAS supply pressure
(mbar)
30,0
30,0
30,0
30,0
30,0
NOZZLE pressure MAX
(mbar)
28,2 28,0 28,0 28,5 28,1
NOZZLE pressure MIN
(mbar)
16,5 16,0 15,5 16,0 16,0
Gas consumption MAX
(kg/h)
0,51 0,68 0,99 1,30 1,58
Gas consumption MIN
(kg/h)
0,39
0,51
0,74
0,98
1,18
Nozzle diameter
(mm)
1,30 1,50 1,80 2,10 2,30
GAS G31
Heat input MAX (Hs)
(kW)
7,0 9,3 13,5 17,9 21,7
Heat input MAX (Hi)
(kW)
6,5
8,6
12,5
16,5
20,0
Heat input MIN (Hs)
(kW)
5,3 7,0 10,2 13,4 16,3
Heat input MIN (Hi)
(kW)
4,9 6,5 9,4 12,4 15,0
GAS supply pressure
(mbar)
37,0 37,0 37,0 37,0 37,0
NOZZLE pressure MAX
(mbar)
36,2
35,7
35,7
36,2
36,2
NOZZLE pressure MIN
(mbar)
22,0 20,0 20,0 20,0 20,0
Gas consumption MAX
(kg/h)
0,50 0,67 0,97 1,28 1,55
Gas consumption MIN
(kg/h)
0,38 0,50 0,73 0,96 1,16
Nozzle diameter (mm) 1,30 1,50 1,80 2,10 2,30
note –the unit “Infra HT 10.2 DS”is NOT in production yet

page 8
INSTALLATION
Ventilation of the ambients
The unit leaves the combustion products into the environment in which it is used (equipment
type A1). It is therefore necessary to ensure ventilation and air changes of the premises
in which the heater is installed, realizing appropriate air outlet openings on the perimeter
walls of the same, or creating a system of mechanical ventilation. To ensure a sufficient air
change, the flow of air needed can be calculated using the following equation (UNI EN 13410):
Vtot = ΣQnb x L
Where :
•Vtot air change flow rate in m
3/h
•ΣQnb total heating power installed in the premises in kW
•L air change coefficient (must be ≥ 10 m
3 /h / kW)
IMPORTANT !!! air change coefficient “L” to be used MUST NOT
be lower than 10 m3/h for each kW of installed power
For NO reason the heaters can be installed :
•in ambients used as residential ambient
•in rooms smaller than 12 m3
•where wind speed is higher than 2 m/s
IMPORTANT:
heaters
must be installed
in
well-ventilated and manned ambients, in
compliance with current legislation

page 9
Positioning of the radiant heater
The heaters can be installed on walls / pillars, or hanging at ceiling. On request, we can
provide supports (S hooks and chains are excluded) for suspension at ceiling (picture 1), or
wall brackets to fix the heaters on the wall (picture 2) with different angled positions for
the heater. The following figures will show you how to install all types of heaters.
picture 1 – with chains seriesInfra HT.2 picture 2 – at wall seriesInfra HT.2
picture 1 – with chains series Infra HT.2 eco picture 2 – at wall series Infra HT.2 eco
picture 1 – with chains series Infra HT.2 DS picture 2 – at wall series Infra HT.2 DS

page 10
The brackets provided by MARK BV allow an angle of installation variable once mounted on a
wall or pillar, in order to get a better heat distribution (picture 2.1 shows supports for units
type Infra HT.2 eco, Infra HT.2 eco PIEZO and Infra HT.2 DS)
IMPORTANT !!!
•at each side of the burner 2 hooks are provided with M8 inserts, for fixing to a wall or
at ceiling by means of appropriate brackets (not supplied, available on request); do not
create other anchor points on the carpentry of the heater and in particular on
the body burner, but use only those designed by the factory
•we recommend MARK BV original brakets for installation of the radiant heaters
•for fixing brackets on a wall or pillars assess the consistency of walls and the load
applied, in order to choose the correct anchors to be used; in any case provide
blocks with M8 screw minimum diameter (e.g. anchor Fischer TA - M in steel, with M8
screw)
IMPORTANT !!!
The equipment must be installed in horizontal position.
In any case, the system of fixing / suspension must allow the thermal expansion of
appliance (some m illimeter depending on the model).
picture 2.1 – different angles available

page 11
MINIMUM height of installation (for people confort)
The indicative heights for the installation of heaters are as follows :
MODEL HEIGHT of INSTALLATION (mt)
MIN MAX
Infra HT 4.2 PIEZO ; Infra HT 4.2 eco PIEZO 2,5 4,5
Infra HT 6.2 PIEZO ; Infra HT 6.2 eco PIEZO 3,5 5,0
Infra HT 8.2 PIEZO ; Infra HT 8.2 eco PIEZO 4,0 6,0
Infra HT 4.2 ; Infra HT 4.2 eco ; Infra HT 4.2 DS 2,5 4,5
Infra HT 6.2 ; Infra HT 6.2 eco ; Infra HT 6.2 DS 3,5 5,0
Infra HT 8.2 ; Infra HT 8.2 eco ; Infra HT 8.2 DS 4,0 6,0
Infra HT 10.2 ; Infra HT 10.2 eco ; Infra HT 10.2 DS 5,0 7,0
Infra HT 12.2 ; Infra HT 12.2 eco ; Infra HT 12.2 DS 6,0 8,0
Infra HT 16.2 ; Infra HT 16.2 eco 7,0 9,0
Infra HT 10+10.2 ; Infra HT 10+10.2 eco 8,0 11,0
Infra HT 12+12.2 ; Infra HT 12+12.2 eco 9,0 14,0
Infra HT 16+16.2 ; Infra HT 16+16.2 eco 10,0 18,0
Height “MIN" means the minimum distance at which the equipment should be installed so that
people who are in radiated zone, are not subject to excessive heat.
Quotes relate to equipment installed in horizontal position for heaters with angled position
(15 ÷ 45 °); the minimum height can be reduced roughly between a 5% (15 ° angle) and a
20% (45 ° angle).
Shares relate to installation with ambient temperature of 10 ÷ 12 °C; in case of ambients
with higher or lower temperatures the minimum height of installation must be reviewed;
consider a reduction of 5% (for temperatures lower of approx. 5 ° C) or increase of 5% (for
temperatures higher of approx. 5 ° C).
Above heights of installation are indicative, consult us each case to select the correct unit
and the best height of installation (in particular for limit values).

page 12
MINIMUM distances from flammable surfaces
IMPORTANT !!! The flammable materials inside the radiation could begin to burn and
cause fires.
Minimum distances of installation must be respected between the heating surface of the
heater and the adjacent walls, inside the area of radiation and outside, if they are not
protected against radiation or are flammable materials; in case below minimum distances
can not be met, consider to mount screens for the heat.
Pay special attention also in cases of installing heaters above craneways.
The MINIMUM distances are as follows :
MODEL MINIMUM distance (mt) between heater and ...
ceiling floor front sides
Infra HT 4.2 PIEZO ; Infra HT 4.2 eco PIEZO 1,0 2,0 1,0 1,0
Infra HT 6.2 PIEZO ; Infra HT 6.2 eco PIEZO 1,0 2,5 1,0 1,0
Infra HT 8.2 PIEZO ; Infra HT 8.2 eco PIEZO 1,5 3,0 1,5 1,5
Infra HT 4.2 ; Infra HT 4.2 eco ; Infra HT 4.2 DS 1,0 2,0 1,0 1,0
Infra HT 6.2 ; Infra HT 6.2 eco ; Infra HT 6.2 DS 1,0 2,5 1,0 1,0
Infra HT 8.2 ; Infra HT 8.2 eco ; Infra HT 8.2 DS 1,5 3,0 1,5 1,5
Infra HT 10.2 ; Infra HT 10.2 eco ; Infra HT 10.2 DS 1,5 3,5 1,5 1,5
Infra HT 12.2 ; Infra HT 12.2 eco ; Infra HT 12.2 DS 1,5 4,0 2,0 1,5
Infra HT 16.2 ; Infra HT 16.2 eco 1,5 4,5 2,0 1,5
Infra HT 10+10.2 ; Infra HT 10+10.2 eco 2,0 5,0 2,5 2,0
Infra HT 12+12.2 ; Infra HT 12+12.2 eco 2,0 5,5 2,5 2,0
Infra HT 16+16.2 ; Infra HT 16+16.2 eco 2,0 6,0 2,5 2,0
NOTE –contactus in case of different quotes orspecial cases
SURFACES CLOSE to HEATERS MUST BE DONE IN MATERIAL of CLASS
'A0' with respect TO FIRE RESPONSE (NOT COMBUSTIBLE and NOT
INFIAMMABLE) and with DEGREE of RESISTANCE TO FIRE EQUAL or
MORE THAN "REI 90"

page 13
Connection to gas supply
IMPORTANT !!! hydraulic connection of the heater to the gas distribution net must be made
according to information given in this technical book exclusively by professionally qualified
staff
The heaters are provided according to the type of gas chosen, and then before making the
connection to the power network of gas, make sure that the gas used corresponds to
what is shown on the data plate lebel of the unit. Before connection to the gas
pipeline, make sure that the pipes are properly cleaned and produced in accordance
with regulations in force in the country of installation.
>>> NOTICE : provide a fuel interception tap in the vicinity of the heater, and with easily
accessible position; make the connection between the heater and the gas network
using an approved steel flexible pipe.
Once the connection is made, in compliance with the rules in force in the country of
installation, a) verify the sealing of hydraulic pipes and gas connection to the unit, b) check
that the pressure is correct, c) make sure that the apparatus functions in the conditions for
whic h it was prepared.
•Models Infra HT.2 , Infra HT.2 eco and Infra HT.2 DS : the connection is 1/2" gas.
The models Infra HT.2, Infra HT.2 eco and Infra HT.2 DS are equipped with a
multifunctional group composed of double seat valve fitted with pressure stabilizer and
integrated flame control. The stabilizer accepts a maximum inlet pressure of 50
mbar and the valve is equipped with a pressure intakes, to measure and control
incoming and outgoing pressures.
•Models Infra HT.2 PIEZO and Infra HT.2 eco PIEZO : the connection is 3/8" gas.
The Infra HT.2 PIEZO and Infra HT .2 eco PIEZO models are equipped with valve tap,
pressure stabilizer for a maximum inlet pressure of 50 mbar, and pressure intake
at the nozzle.
NOTE : all units are supplied already tested and set to the properly
operating pressure; therefore DO NOT remove seals, DO NOT
change the values (expiring of guarantee !!!)
IMPORTANT !!! the feeding gas pipeline must be kept at a distance of at least
1 m from the zone of discharge of the combustion products and must not be
exposed all'irraggiamento direct irradiation of heaters

page 14
Connection to electric supply
(only for units with flame control)
The heater must be fed with 230V / Single Phase / 50Hz voltage. The control flame mounted
on gas valve has a plug/socket connection with security hook (picture 3). Mount a bipolar
switch upstream of the heater for switch-on and switch-off, so you can isolate it from electric
supply. Use this manual for the size of the power supply line, or refer to the data given in the
plate label of the heater. In any case, for ON-OFF version use a cable 3x1.5mm
2 minimum
section. The wiring diagrams are shown on page 20 (ON-OFF version) and page 23 (H/L =
TWO-STAGES version) of this manual.
For the electrical connection unlock the plug and unscrew its case; connect a tri-polar cable
according to the indications given on the terminal plug, namely:
L1 phase wire
N neutral wire
earth wire
L2 modulator command for H/L = two-stages gas valve (if provided)
L3 signal for burner block (if provided)
It is also essential for the smooth functioning of the appliance, and for the safety of the user,
an efficient plant earthing, executed according to existing regulations. Under no
circumstances you can use the conduit connection of gas as earthing of equipment.
Picture 3 – Connector for electric connection
IMPORTANT: the electrical connection of the equipment shall be made in
accordance with the directions given in this technical book exclusively by
professionally qualified personnel. The installation must be carried out in
accordance with regulations in the country of installation.
IMPORTANT: It is essential for the smooth functioning of the heater, to
respect the Phase / Neutral polarity of the network, with one indicated
on the power connector.

page 15
WIRING DIAGRAM, “SIT” control unit ON-OFF

page 16
NOTE for SIT “HIGH / LOW” gas valve = two-stages
>>> NOTICE : the “HIGH / LOW ” version must be equipped with a specific
switch for pressure modulator feeding, to be placed in
the main electric switchboard.
Modulator fed: HIGH pressure running
Modulator NOT fed: LOWpressure running
IMPORTANT !!! start-up of the heater must always take place
with the modulator fed (HIGH pressure running)
You will find the data (heat input, pressure and gas flow rate) referring to the apparatus with
H/L = TWO-STAGES version, in the tables of this manual :
. heaters Infra HT.2 and Infra HT.2 eco page 5
. heaters Infra HT.2 DSpage 7
The H/L = TWO-STAGES version allows :
Øsave on gas consumption
Øbetter confort condition for people
Ølower number of start-up / switch-off of the heater

page 17
Setting of the pressure
Unscrew the screw of the PO pressure intake of the gas valve before the nozzle (pictures 1.A
and 1.B), and connect a water column manometer. Feed the modulator and take out the
yellow tap of the pressure regulator. Act, as shown in picture 2, on the CH10 screw for setting
of the maximum pressure, till you get the required pressure. Take out tension at the pressure
modulator, and with a screw-driver act on the inner screw for minimum setting (picture 3) till
you get the required pressure.
Picture 1.A
Picture 1.B
Picture 2 Picture 3

page 18
WIRING DIAGRAM, SIT control unit H/L = TWO-STAGES

page 19
PUT IN OPERATION and FIRST START-UP
When the first ignition of heater is important to do some preliminary checks to ensure
proper operation of the unit. The operations listed below are considered essential for its safe
operation.
•make sure there are no losses in the gas line and that is properly sized
•check that the pressure of fuel and type of gas used comply with the provisions on the
plate of the characteristics of the heater
•check the proper installation of gas valve / control flame group (only models Infra HT.2,
Infra HT.2 eco and Infra HT.2 DS)
•check that the power electric line has been correctly sized, which has been respected
phase - neutral polarity and that the cable earthing is connected (only models Infra
HT.2, Infra HT.2 eco and Infra HT.2 DS)
•make sure the mechanical installation (supports) of the heater have been properly
carried out and that the connections bolts are tight
•use only steel materials, since heat is transferred from heaters to supports

page 20
Put in operation and First Start-up for units with
ELECTRONIC CONTROL UNIT
(Infra HT.2, Infra HT.2 eco and Infra HT.2 DS)
For the heaters with an ignition system and electronic control flame, the start-up sequence
includes the following phases:
•giving tension to the heater, ignition electrode begins sparkling, and the gas valve
opens
•the sparkling electrode ends after 30 seconds
•in the case has not been detected the presence of flame, control flame goes into block
after 30 seconds. For re-start it is necessary to remove tension for a period of not less
than 20 seconds: after that period of time, the start-up sequence can be repeated. If
the heater continues going into block, refer to the section 'Maintenance' of this manual
•switch-off of the heater is done by taking out power supply to control unit
So, must perform the following procedure (picture 4) :
•unscrew the screw of intake pressure, upstream at the nozzle (PO) and connect a
suitable gauge
•remove the cap of pressure regulator (R) and act, as shown in picture 4, on the
screw of adjustment till match up to the pressure gauge reading with that stated on
plate on the characteristics
•disconnect the pressure gauge and close the screw of intake pressure (PO)
•reassemble the cap of the regulator (R) and place a suitable seal
Picture 4 – Setting of working pressure for
models Infra HT.2, Infra HT.2 eco and Infra HT.2 DS with “SIT”valve
IMPORTANT: at time of first start-up of the heater, pressure setting has to be
checked, then must be sealed the body of pressure regulatorof gas valve