exeltec X CERK HE User manual

Installation , use and maintenance
manual
Gas fired radiant strips heating systems
Technoparc Saône
Vallée Est
-
215 Rue Marie Curie
-
01390 Civrieux en Dombes
Tel : [phone] Fax : [phone]
www.exeltec.fr – [e-mail]
X-CERK HE EVO 4 -2022-11--Iss1-0-EN
X CERK HE
/ X CERK HE
-
Jr
pr
e
-
mix
burner EVO4

This equipment has been manufactured to work for the intended purposes, without risk, provided
that the following indications are observed:
• Installation, use and maintenance are carried out according to the instructions in the present
manual;
• Power supply and working conditions comply with the product plate data.
IMPORTANT:
PLEASE READ THE INSTRUCTIONS CAREFULLY BEFORE PROCEEDING
WITH THE INSTALLATION AND USE OF THIS EQUIPMENT.
KEEP THE MANUAL FOR FUTURE REFERENCE.
This booklet has been prepared and printed by EXELTEC SAS. Reproduction, even in part, is forbidden without prior
permission.
Constant development in search of product improvement may lead, without advance notice, to changes or
modifications of the contents and descriptions herein

Contents
1 INTRODUCTION ................................................................................. 3
2 WARNINGS ........................................................................................ 4
2.1 Special warnings ................................................................................. 5
2.2 Disposal ............................................................................................ 5
2.2.1 Information to users ........................................................................... 5
2.3 General description ............................................................................. 6
2.4 Symbols and terminology used in the manual .......................................... 7
2.4.1 Terminology ...................................................................................... 7
2.4.2 Symbols ........................................................................................... 8
3 INTENDED USE .................................................................................. 9
3.1 General description and intended use ..................................................... 9
3.2 Identification data of the machine........................................................ 10
4 TECHNICAL DATA ............................................................................ 11
4.1 Technical data in accordance with regulation (EU) 2015/1188 – DIRECTIVE
2009/125 / EC (ErP) ....................................................................................... 12
4.2 Dimensions of thermal units SX (left version) ........................................ 14
4.3 Dimensions of thermal units DX (right version) ...................................... 16
4.4 Radiant ducts dimensions in millimetres ............................................... 18
4.5 Thermal unit components ................................................................... 19
4.6 Radiant ducts components.................................................................. 20
5 INSTALLATION ................................................................................ 21
5.1 Functional and surrounding spaces for the thermal unit ........................... 21
5.2 Distance between radiant ducts and combustible material ....................... 22
5.3 Transport, handling and lifting ............................................................ 23
5.3.1 Handling the thermal unit using eye-bolts (only mod. HE) ....................... 24
5.4 Mounting of thermal unit .................................................................... 26
5.5 Installation of the thermal unit over roof ............................................... 34
5.6 EXHAUST PIPE.................................................................................. 35
5.6.1 Water drain in the flue ....................................................................... 36
5.7 Installation of the radiant modules ....................................................... 36
5.7.1 First and second module .................................................................... 36
5.7.2 Installation of the next modules .......................................................... 38
5.7.3 Expansion joints ............................................................................... 44
5.8 Connections to gas net ...................................................................... 45
5.9 Electrical connections ........................................................................ 47
5.9.1 Thermal overload and short circuit protection ........................................ 47
5.9.2 Grounding ....................................................................................... 47
5.9.3 Protection from indirect contacts ......................................................... 47
5.9.4 Connection terminal board ................................................................. 48

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5.9.5 Connection diagram for sensors and EU-CM300 user interface .................. 49
5.9.6 Electrical diagram for mod. HE ............................................................ 51
5.9.7 Electrical diagram for mod. HE-Jr ........................................................ 52
5.9.8 Electrical panel on board the machine (mod. HE / HE-Jr) ......................... 54
5.9.9 EU-SP300 programmable power board ................................................ 55
5.9.10 Local operation and via EUBus network with EU-NET (with EU-Qbo100) and
EU-VISION (with EU-Qbo 300) configurations ........................................ 55
5.9.11 EUBus network connection scheme for EU-NET and EU-VISION configurations
56
6 WORKING SEQUENCE ...................................................................... 58
7 COMMISSIONING, SERVICE AND MAINTENANCE ............................. 59
7.1 Safety requirements .......................................................................... 59
7.2 Access to the thermal unit .................................................................. 60
7.3 Commissioning and start-up ............................................................... 60
7.4 Ordinary maintenance – General indications and prescriptions .................. 61
7.5 Ordinary maintenance operations ........................................................ 62
7.5.1 Thermal unit .................................................................................... 62
7.5.2 Radiant circuit modules ...................................................................... 63
7.5.3 Summary of main ordinary maintenance operation. ................................ 64
8 TROUBLESHOOTING ........................................................................ 66
8.1 Error code identification ..................................................................... 66
8.2 Error removal procedure .................................................................... 67
8.2.1 Errors reset ..................................................................................... 74
8.3 Problems during operation .................................................................. 75
8.4 Operation status and burner cycle diagram ........................................... 76
9 WARRANTY TERMS .......................................................................... 78

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1 INTRODUCTION
This manual contains the description of X CERK HE EVO4 radiant strips heating system operation
and the instructions necessary to correctly perform the main operations concerning installation, use
and routine maintenance.
The information provided is intended for a professional user. This user must have specific
knowledge on the use of the heating unit, be properly instructed and trained and have the necessary
authorization to operate on it.
The use of original spare parts and accessories is recommended. The installation of non-original
spare parts will invalidate the warranty. Furthermore, non-original parts could reduce the useful
life and performance of the heating system, as well as be dangerous.
Special symbols are present on the unit. The heating system manager has the responsibility to
keep them in perfect visual condition and to replace them in case they are no longer legible.

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2 WARNINGS
Carefully read the instructions and warnings contained in this document before starting the system
up, as they provide important information regarding safety, installation, use and maintenance.
1. This manual is an integral and essential part of the product and must be kept in a safe place
and made available to personnel;
2. Give this manual to the new owner and/or installer who will take care of the installation if
the appliance is sold, or transferred. In case of loss, immediately ask EXELTEC for a copy;
3. EXELTEC disclaims any liability for direct or indirect damage to people, animals or objects
arising from errors in installation, use, failure to comply with the instructions in this manual
and in any case with the instructions provided by the manufacturer;
4. The system must be installed in compliance with national and local regulations in force in
the country of installation;
5. This system shall be used solely for the purposes for which it was expressly designed and
built. Any other use is to be considered improper and therefore dangerous;
6. Any contractual or non-contractual liability of the manufacturer for damages arising from
errors in installation, use and in any case from non-observance of the instructions provided
by the manufacturer is excluded;
7. Installation in premises where artisan or industrial activities are carried out or where working
activities and materials may lead to the risk of formation of gases, vapours or dusts likely
to give rise to fires or explosions is not permitted;
8. The installation and start up of the system must be carried out by qualified and authorized
personnel;
9. The packaging elements (nails, staples, plastic bags, polystyrene foam, etc.) must not be
left within the reach of children as they are potential sources of danger, but must be disposed
of in accordance to current legislation.
Check the system every year through a EXELTEC authorised service centre.

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2.1 Special warnings
Check that the heat unit is pre-set to operate with the electrical power and the gas available in the
network by checking what is indicated in the serial data on the unit.
Check the seal of the gas supply installation, check that it has the suitable size for the necessary
capacity and that it is equipped with all safety and control devices according to the laws in force.
The electrical safety of the installation is complete when the installation is correctly connected to
an efficient grounding system that must meet the requirements of the laws in force.
In case of repeated arrests of the thermal unit do not persist in performing manual reset
procedures, but contact the professional, qualified personnel to solve this anomalous issue.
Deactivate the device in case of failure and/or malfunctioning, do not try to fix and/or directly
intervene on it, but promptly contact the authorised customer service. In case of prolonged
inactivity, close the valve of gas interception and power off the system.
If there are works in the place where the radiant circuit is to be installed, avoid accidental impacts
that can damage the seal of radiant pipes.
Should the installation be subject to demolition, respect the laws in force in the country where the
installation is located.
All materials and/or substances must not be dispersed in the environment but reused and/or
disposed of according to current legislation.
The installation contains the following materials:
 plastic components;
 electrical/electronic components;
 single and double insulated electrical wires;
 mineral wool insulating material;
 glass wool insulating material;
 steel, copper and aluminium.
2.2 Disposal
2.2.1 Information to users
Illegal/abusive disposal of products on the part of the user, leads to the application of the
administrative sanctions foreseen by the Italian Legislative Decree 152/2006.
INFORMATION TO USERS according to art. 14 of the Directive 2012/19/EU of the European
Parliament and of the Council of 4 July 2012 on waste electrical and electronic equipment (WEEE).

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The crossed bin symbol (Fig. 2.1) on the appliance or on its packaging indicates that the product,
at the end of its operating life, must be collected separately and not disposed together with other
mixed urban waste.
Fig 2.1 Fig. 2.2
The separate collection of this equipment at the end of its life is organized and managed by the
manufacturer. The user who wishes to dispose of the present equipment can therefore contact the
manufacturer and follow the system that this has adopted to allow the separate collection of the
equipment at the end of life, or autonomously select an authorized waste chain for its management.
The adequate separate collection of the disused equipment for the start after recycling, treatment
and environmentally compatible disposal helps to avoid possible negative effects on the room and
human health and favours the reuse and / or recycling of the materials of which it is composed the
equipment.
2.3 General description
XCERK HE/HE-Jr is a radiant heating system operating with gas, and it is particularly suitable to
heat medium-large environments. Its design and manufacturing have involved special attention in
order to obtain optimal results in terms of efficiency, safety, temperatures uniformity and reduction
in polluting emissions.
XCERK HE/HE-Jr consists of aluminised steel fixed on the ceiling of the room to heat. The heated
pipes emit infrared rays that heat the environment without creating air movement.
The production of the heat necessary for heating the radiant pipes takes place through a heat unit
equipped with modulating burner. The heat exchange of the combustion chamber to the fluid
present in the pipes is ensured by the continuous recirculation of the same fluid through a
centrifugal fan.

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2.4 Symbols and terminology used in the manual
2.4.1 Terminology
DAMAGE Physical injury or damage to health
GCV Higher calorific value, it is the total quantity of heat emitted by a
fuel mass unit dried till its intrinsic humidity, when this is
subjected to complete combustion in presence of oxygen and
when the products of combustion are back to the original pre-
combustion temperatures; this quantity includes the vapour
condensation heat created by the combustion of the hydrogen
contained inside the fuel.
NCV Lower calorific value, it is the total quantity of heat emitted by a
fuel mass unit containing a proper humidity level, when this is
subjected to complete combustion in presence of oxygen and
when the products of combustion are back to the original pre-
combustion temperatures.
DANGER Potential source of damage, the term danger can be qualified in
order to state its origin (for example electric, danger, mechanical
danger, etc.).
QUALIFIED PERSONNEL Person having the requisites required by the law in force, who
has achieved experience concerning the necessary interventions,
who attended proper specialisation and/or professional training
courses.
USER Person using the product.
INTENDED USE Use of the appliance in conformity to the indications in the
present manual.

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2.4.2 Symbols
SYMBOL DESCRIPTION
NOTE
Indicates information useful for the correct operation of the system or
behavioural indications.
DANGER
Indicates a high level of danger. Failure to comply may result in serious injuries
or death
DANGER
Indicates a medium level of danger. Failure to comply may result in medium or
serious injuries
ATTENTION
Indicates a warning. Failure to comply may result in material or functional
damage, even irreversible damage
PROHIBITION
Generic prohibition
PROHIBITION
Do not use screws
PROHIBITION
Do not use sealant
INDICATION
Use sealant
INDICATION
Use screws
Tab. 2.1

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3 INTENDED USE
3.1 General description and intended use
X CERK HE/HE-Jr is a radiant heating system operating with gas, and it is particularly suitable to
heat medium-large environments. Its design and manufacturing have involved special attention in
order to obtain optimal results in terms of efficiency, safety, temperatures uniformity and reduction
in polluting emissions.
X CERK HE/HE-Jr consists of aluminised steel fixed on the ceiling of the room to heat. The heated
pipes emit infrared rays that heat the environment without creating air movement.
The production of the heat necessary for heating the radiant pipes takes place through a heat unit
equipped with modulating burner. The heat exchange of the combustion chamber to the fluid
present in the pipes is ensured by the continuous recirculation of the same fluid through a
centrifugal fan.
Any use of the system other than that indicated above is to be considered
unauthorised and dangerous.

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3.2 Identification data of the machine
Each appliance is identified with a rating plate containing its technical characteristics and serial
number. This label, together with warning ones, are applied on the electrical panel on board of the
unit and they must not be removed.
Below is an example of the aforementioned label.
Fig. 3.1
In case of orders of spare parts or inquiries about procedures for the use and/or
maintenance of the radiant strips heating systems, always indicate exact model
and serial number as shown on the rating plate.
It is absolutely forbidden to remove the rating plate or alter its data.

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4 TECHNICAL DATA
TECHNICAL SPECIFICATION X CERK HE X CERK HE-Jr
Nominal heat output [kW] Heat input [kW] 275.8 114.4
Thermal efficiency NCV 100% [%] 290 120
Thermal efficiency NCV 50% [%] 92.90% 93.10%
Envelope loss factor [%] 95.50% 95.40%
Exhaust gas – thermal loss @ burner ON [%] 2.20% 2.20%
Exhaust gas – thermal loss @ burner ON [%] 4.90% 4.70%
Exhaust gas – thermal loss @ burner OFF [%] <0,1% <0,1%
Useful efficiency NCV 100% [%] 95.10% 95.30%
Useful efficiency NCV 50% [%] 96.60% 96.50%
Exhaust gas temperature @ 100% [°C] (*)
120 ÷ 170
110 ÷ 140
Exhaust gas temperature @ 50% [°C] (*) 70 ÷ 120 60 ÷ 100
Fuel gas – compatibility G20 - G25 - G31
Heat-transfer fluid -
Emission system Radiant strip
Power supply [V/Hz/-] 400 / 50 / 3F+N
Installed electric power [kW] 2.7 1.6
Power consumption in stand-by [W] 10 10
Max input current [A] @ 400 V / 50 Hz 4.7 2.7
Inverter presence
YES
Modulation of the recirculation fan for combustion products YES
Combustion modulation YES
Evacuation of the combustion products – Type of installation B22 ; B52
Category II2H3P
Regulation mode Modulating
Burner type Mixing premix blown
Exahust gas - available pression [Pa] 50 10
Exhaust gas – duct max. length [m] (**) 5 8
Flue gas connection [mm] 150 120
Gas supply connection [BSP] 1” 3/4”
Nitrogen oxides emissions [mg/kWh] 27 29
Unit weight [kg] 190 122
Frame weight [kg]
29
20
Lw - Max sound power level [dB(A)] 90 86
Lp - Max sound power level @5m [dB(A)] 73 69
Supply pressure G20 min / max [mbar] 20 / 100 20 / 50
Supply pressure G31 min / max [mbar] 37 / 100 37 / 50
Radiant modules compatibility M8Ø3 – M4Ø3
M12Ø3
M8Ø2
M8Ø3 – M4Ø3
Tab. 4.1
Reference gas G20
*
Variable depending on module type and radiant line configuration
**
Consider that each 90° curve corresponds to 1.5 linear metres of duct.
***
Refer to the specifications indicated in the paragraph 5.8 .
The thermal unit has been designed for an operating temperature between 0 °C
(*) and + 40 °C
(*) With optional electric heater, to be ordered on request, it is possible to extend the operation up
to – 15°C outside temperature.

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4.1 Technical data in accordance with regulation (EU) 2015/1188 –
DIRECTIVE 2009/125 / EC (ErP)
Mandatory information for local space heaters for commercial use.
Model identification: XCERK-HE-
Jr
60
XCERK-HE-
Jr
60
XCERK-HE-Jr
120
XCERK-HE-Jr
120
Heat generator to be installed outside the heated area yes no yes no
Type of heating: radiant strips radiant strips radiant strips radiant strips
Fuel Natural gas H Natural gas H Natural gas H Natural gas H
Fuel Gaseous Gassoso Gassoso Gassoso
Data Value Value Value Value
Space heating emissions (*)
(NOx ≤ 200 mg/kWhinput)
[mg/kWhinput]
(GCV)
26 26 26 26
Heat output
Nominal heat output Pnom kW 57.2 57.2 114.4 114.4
Minimum heat output Pmin kW 28.6 28.6 57.2 57.2
Minimum heat output
(percentage of nominal heat output)
.. % 50 50 50 50
Nominal tube system heat output (if applicable) Psystem kW N.A. N.A. N.A. N.A.
Nominal tube segment heat output (if applicable) Pheater,i kW N.A. N.A. N.A. N.A.
Number of identical tube segments n - - - - -
Radiant factor
Radiant factor at nominal heat output RFnom - 0.6446 0.6446 0.6446 0.6446
Radiant factor at minimum heat output RFmin - 0.5914 0.5914 0.5914 0.5914
Radiant factor of tube segment at nominal heat output RFi - - - - -
Auxiliary electricity consumption
At nominal heat output elmax kW 0.500 0.500 0.500 0.500
At minimum heat output elmin kW 0.337 0.337 0.337 0.337
In standby mode elSB kW 0.010 0.010 0.010 0.010
Permanent pilot flame power requirement
Pilot flame power requirement
(if applicable)
Ppilot kW N.A. N.A. N.A. N.A.
Useful efficiency (GCV) — tube local space heaters only (**)
Useful efficiency at nominal heat
output (**)
ηth,nom % 85.8 85.8 85.8 85.8
Useful efficiency at minimum heat
output (**)
ηth,min % 85.9 85.9 85.9 85.9
Useful efficiency of tube segment at minimum heat
output (if applicable)
ηi % N.A. N.A. N.A. N.A.
Envelope losses
Envelope insulation class U W/m2K 0.5 0.5
Envelope loss factor Fenv % 2.2% -- 2.2% --
Heat output control type (select one)
— single stage (ON/OFF) no no no no
— two stage no no no no
— modulating yes yes yes yes
Seasonal space heating energy efficiency
(≥74%)
ηS % 85.2 87.5 86.1 88.3
(*) Nox = nitrogen oxides
Tab 4.2

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Model identification:
XCERK-HE 150 XCERK-HE 150 XCERK-HE 300 XCERK-HE 300
Heat generator to be installed outside the heated area
yes no yes no
Type of heating:
radiant
strips
radiant
strips
radiant
strips
radiant
strips
Fuel Natural gas
H
Natural gas
H
Natural gas
H
Natural gas
H
Fuel
Gaseous Gassoso Gassoso Gassoso
Data Value Value Value Value
Space heating emissions (*)
(NOx ≤ 200 mg/kWh
)
input
[mg/kWh
]
inp ut
(GCV)
19 19 19 19
Heat output
Nominal heat output
P
nom
kW 142.7 142.7 275.8 275.8
Minimum heat output
P
min
kW 77.3 77.3 140.1 140.1
Minimum heat output
(percentage of nominal heat output)
.. % 54 54 51 51
Nominal tube system heat output (if applicable)
P
system
kW N.A. N.A. N.A. N.A.
Nominal tube segment heat output (if applicable)
P
heater,i
kW N.A. N.A. N.A. N.A.
Number of identical tube segments
n - - - - -
Radiant factor
Radiant factor at nominal heat output
RF
nom
-
0.6487 0.6487 0.6487 0.6487
Radiant factor at minimum heat output
RF
min
-
0.5951 0.5951 0.5951 0.5951
Radiant factor of tube segment at nominal heat
output
RF
i
- - - - -
Auxiliary electricity consumption
At nominal heat output
el
max
kW 0.813 0.813 0.813 0.813
At minimum heat output
el
min
kW 0.485 0.485 0.485 0.485
In standby mode
el
SB
kW 0.010 0.010 0.010 0.010
Permanent
pilot flame power requirement
Pilot flame power requirement
(if applicable)
P
pilot
kW N.A. N.A. N.A. N.A.
Useful efficiency (GCV) — tube local space heaters only (**)
Useful efficiency at nominal heat
output η
th,nom
% 85.6 85.6 85.6 85.6
Useful efficiency at minimum heat
output η
th,min
% 87.0 87.0 87.0 87.0
Useful efficiency of tube segment at minimum hea
t
output (if applicable)
η
i
%
N.A. N.A. N.A. N.A.
Envelope losses
Envelope insulation class
U
W/m2K
0.5 0.5
Envelope loss factor
F
env
% 2.2% -- 2.2% --
Heat output control type (select one)
— single stage (ON/OFF)
no no no no
— two stage
no no no no
— modulating
yes yes yes yes
Seasonal space heating energy
efficiency
(≥74%)
η
S
% 87.1 89.3 87.5 89.8
(*) Nox = nitrogen oxides
Tab. 4.3

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4.2 Dimensions of thermal units SX (left version)
Fig. 4.1
1 = Gas
connection
2 = Electrical connection

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DIMENSION X CERK HE-Jr (mm) X CERK HE (mm)
A 1544 1757
B 459 660
C 265 264
D 157 189
E 658 640
F 326 490
G 358 416
H 120 150
I 820 833
J 239 384
K 320 340
L 239 274
M 798 998
N 930 1125
O 824 1023
P 311 372
Q 358 440
R 591 813
S 34 180
T 750 750
U 34 68
V 144 287
W 364 406
X 176 213
Y 528 710
WEIGHT 122 kg 190 kg
Tab 4.4

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4.3 Dimensions of thermal units DX (right version)
Fig. 4.2
1 = Gas connection
2 = Electrical connection

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DIMENSION X CERK HE DX (right version)
(mm)
A 1767
B 660
C 272
D 180
E 630
F 613
G 291
H 150
I 833
J 384
K 340
L 274
M 998
N 1125
O 1023
P 436
Q 469
R 813
S 70
T 750
U 179
V 120
W 406
X 376
Y 710
WEIGHT 190
kg
T
ab.
4.5

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4.4 Radiant ducts dimensions in millimetres
M12Ø3 model weighs 30 kg/m and has the following dimensions:
Fig. 4.3
M8Ø3 model (on the left) weighs 25 kg/m while M4Ø3 model (on the right) weighs 19 kg/m.
Their dimensions are:
Fig. 4.4
M8Ø2 model (M8Ø2-RV with “V” reflector and M8Ø2-ST without reflector) weighs 20 kg/m and
has the following dimensions:
Fig. 4.5