Exodraft EHC20 User manual

EHC20
Mounting, installation
and operating manual
GB
Read and save these instructions!

A. SUMMARY of assembly, installation and oper-
ating instructions. . . . . . . . . . . . . . . . . . . . . . 4
A.1 Description ..........................4
A.2 About the automatic controller .......4
A.3 Scope of delivery .....................4
B. Installation........................ 5
B.1 Wall mounting .......................5
B.1.1 Housing base.......................5
B.1.2 Housing cover ......................5
B.2 Electrical connection .................6
B.3 Temperature sensor installation.......6
C. Terminal plan and connections ..... 7
C.1 Terminal housing.....................7
C.2 Terminal plan for electrical connection 7
D. Pin-out diagram ................... 8
D.1 Program 6.1.7 Heat exchanger with bypass
damper, one buer memory and mixer. ....8
E. Installation note for 3-way mixing valve
10
E.1 SM230 with MV20/25/32 installation note
10
F. Service and start-up ..............11
F.1 Display and entry................... 11
F.2 Initial start-up with the start-up assistant
12
G. Lock menu .......................12
G.1 Activate/deactivate the lock menu .. 12
H. Option for heat quantity counter SE 20/SE 25/
SE 32 ................................13
H.1 Assembly and connection .......... 13
H.2 Start-up and set-up................. 14
I. SD card ..........................15
I.1 SD card ............................ 15
I.2 Logging............................ 15
I.3 Free storage........................ 15
I.4 Load conguration ................. 15
I.5 Save conguration ................. 15
I.6 Firmware update ................... 15
I.7 Ejection ............................ 15
J. Error messages ................... 16
J.1 Replacing a fuse.................... 16
J.2 Maintenance ....................... 17
K. Product information ..............18
K.1 Description ........................ 18
K.2 About the controller................ 18
K.3 Items supplied ..................... 18
L. Controller description.............19
L.1 Technical data...................... 19
M. Installation....................... 20
M.1 Wall mounting ..................... 20
M.1.1 Housing base......................20
M.1.2 Housing top .......................21
M.2 Electrical connection ............... 21
M.3 Installing the temperature sensors:.. 22
N. Terminal plan and connections .... 23
N.1 Terminal box ....................... 23
N.2 Terminal plan for electrical connections 23
N.3 Hydraulic variants / overview / systems 24
O. Connection diagrams .............26
O.1 Program 6.1.1. Heat exchanger without bypass
damper. With one storage tank. . . . . . . . . . . 26
O.2 Program 6.1.2. Heat exchanger without bypass
damper. With two storage tanks. ......... 28
O.3 Program 6.1.3 Heat exchanger without bypass
damper. With one storage tank and a mixer. 30
O.4 Program 6.1.4. Heat exchanger without bypass
damper. With two storage tanks and a mixer. 32
O.5 Program 6.1.5. Heat exchanger with bypass
damper. With one storage tank. . . . . . . . . . . 34
O.6 Program 6.1.6. Heat exchanger with bypass
damper. With two storage tanks. ......... 36
O.7 Program 6.1.7. Heat exchanger with bypass
damper. With one storage tank and a mixer. 38
O.8 Program 6.1.8. Heat exchanger with bypass
damper. With two storage tanks and a mixer. 40
O.9 Program 6.1.1. Heat exchanger with VFS sensor
for power measurement.................. 42
P. Operation ........................44
P.1 Display and entry system ........... 44
P.2 Setup wizard . . . . . . . . . . . . . . . . . . . . . . . 44
P.3 Unassisted setup ................... 45
P.4 Menu sequence and structure ...... 45
1. Measurements ...................46
2. Statistics .........................47
2.1 Operating hours.....................47
2.2 Heat quantity .......................47
2.3 Graphic overview....................47
2.4 Reports .............................47
2.5 Reset / delete .......................47
3. Operating mode ..................47
3.1 Automatic...........................48
3.2 Manual..............................48
3.3 O ..................................48
4. Settings..........................48
4.1 Tmin S (X) ...........................48
4.2 Tmax S (X)...........................48
4.3 Priority S(X) .........................49
4.4 T priority ............................49
4.5 Filling time ..........................49
4.6 Temperature rise ....................49
5. Protective functions ..............49
5.1 Anti-seize protection ................49
6. Special functions .................50
6.1 Program selection ...................50
6.2 Rotational speed control.............50
6.2.1 Rotational speed modes ...........50
6.2.2 Pump type ........................51
6.2.3 Pump settings .....................51
6.2.4 Purging time ......................53
6.2.5 Control time.......................53
6.2.6 Max. rotational speed..............53
6.2.7 Min. rotational speed ..............53
6.2.8 Setpoint value .....................54
6.3 R2 rotational speed control ..........54
6.4 Relay functions......................54
6.4.1 Thermostat........................54
6.4.2 Thermostat 2 ......................55
6.4.3 Cooling............................55
6.4.4 Return ow temperature rise.......56
6.4.5 Anti-Legionella function ...........56
6.4.6 Transfer ...........................57
6.4.7 Dierence .........................58
6.4.8 Solid fuel boiler....................59
6.4.9 Error messages ....................59
6.4.10 Pressure control ...................60
6.4.11 Booster pump .....................60
6.4.12 Parallel operation R (X).............60
6.4.13 Parallel operation R2...............61
6.4.14 Permanently on ...................61
6.4.15 Heating circuit.....................61
6.5 Heat quantity .......................62
6.5.1 Forward ow sensor (X) ............62
6.5.2 Return ow sensor.................62
6.5.3 Glycol type ........................62
6.5.4 Proportion of glycol................62
6.5.5 Forward throughow (X)...........62
6.5.6 Oset ∆T ..........................62
6.5.7 VFS (X) ............................62
6.5.8 VFS position .......................63
6.5.9 Reference sensor ..................63
6.6 Pressure monitoring.................63
6.6.1 Pressure monitoring ...............63
6.7 Sensor calibration ...................63
6.8 Setup ...............................64
6.9 Factory settings .....................64
6.10 SD card .............................64
6.10.1 Logging ...........................64
6.10.2 Free storage space.................64
6.10.3 Load conguration ................64
6.10.4 Save conguration.................64
6.10.5 Firmware update ..................64
6.10.6 Eject ..............................64
6.11 Time and date.......................65
6.12 Summer time .......................65
6.13 Power saving mode .................65
6.14 Ethernet ............................65
6.14.1 Ethernet...........................65
6.14.2 MAC address ......................65
6.14.3 TCP/IP address.....................65
6.14.4 Network mask . . . . . . . . . . . . . . . . . . . . .65
6.14.5 Gateway...........................65
6.14.6 Login..............................65
6.15 Temperature unit....................65
7. Menu lock........................66
8. Service Data......................66
9. Language ........................66
Q. Faults with error messages ........67
Q.1 Replace fuse ....................... 67
Q.2 Maintenance ....................... 68
R. Useful information / tips and tricks 69
3110086 EHC20 UK 110515
2

Legend for symbols: The following symbols are used throughout the manual as warnings. They indicate potential
hazards or refer to important information relating to the product.
Prohibitory symbol: Failure to observe information marked with a prohibitory symbol can result in
serious injuries – or even death!
Hazard symbol: Failure to observe information marked with a hazard symbol can result in injuries
and/or damage to the device.
Attention symbol: Information that is particularly important for the functioning and optimum use of
the device and the system.
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCKS OR PERSONAL INJURIES,
THE FOLLOWING RULES MUST BE OBSERVED:
• The device should only be used in the manner specied by the manufacturer. If you have any questions,
please contact the manufacturer. The address and telephone number of the manufacturer can be found
in the list at the end of this manual.
• Before maintaining or cleaning the device, switch it o at the service panel and lock the service panel so
that it cannot be turned on again accidentally.
• Installation work and work on the electrical connections should be carried out by specialists in
accordance with the laws and regulations in place.
• Observe the device manufacturer's guidelines and safety regulations as well as the ocial provisions in
force in the particular country.
• The device must be earthed.
No special requirements. The device must be disposed of in accordance with the ocial provisions
concerning the disposal of electronic waste.
3110086 EHC20 UK 110515 3

A. SUMMARY of assembly, installation and operating instructions
A.1 Description
The automatic controller was produced and tested while taking into account all requirements for high-quality and safety.
A two-year warranty from the date of sale applies to the device in accordance with the law.
However, the warranty and liability are not valid regarding damage to persons or property that, for example, are ascribed
to one or more of the following causes:
• Failure to follow these assembly instructions and service guide
• Incorrect assembly, start-up, maintenance or servicing
• Improper repairs carried out
• Unauthorised structural modications made to the device
• Installation of additional components that were not tested with the device
• Any damage resulting from continued use of the device in spite of an evident defect
• Failure to use original repair parts and accessories
• Failure to use the device as intended
• Exceedance of or failure to meet the limit values in the technical data
• Force majeure
A.2 About the automatic controller
The EHC temperature dierence controller enables you to eciently use and check the function of your heat exchanger.
Above all, the device gives you condence through its functionality and simple, almost self-explanatory, operation.
The individual entry keys are assigned to each dierent useful function and explained step-by-step. In the automatic
controller menu, help texts and clear graphics are also available in addition to keywords for measured values and
settings.
The EHC temperature dierence controller can be used with dierent systems.
A.3 Scope of delivery
• EHC20 temperature dierence controller
• Threescrews (3.5x35 mm) and threerawl-plugs (6mm) for wall mounting
• 12 strain relief clamps with 24 screws, replacement fuses 1x T2 A / 250 V
• Micro SD card + adapter
• EHC assembly and service guide
• Thermal compound
• One Pt1000 ue gas temperature sensor
• One Pt1000 pipe surface temperature sensor
• One Pt1000 Buer tank sensor with sleeve
Please use thermal compound with the temperature sensors to ensure better heat transfer.
Optionally included, depending on design/order:
• Flowsensor for energy measurement
4 • Product information 3110086 EHC20 UK 110515

Installation• 5
3110086 EHC20 UK 110515
B. Installation
B.1 Wall mounting
1. Loosen cover screw completely
2. Carefully remove the terminal cover from the bottom part. Loosen the two screws on the top part and
remove the top part from the base.
3. Mark the three mounting holes (see ”C.1.1 Housing base”). Make sure that the wall surface is as even as
possible so that the housing is not warped when attached.
4. Drill three holes in the wall at the marked places using a drill and #6 bit and insert the rawl-plugs.
5. Set the automatic controller on the upper screw.
6. Insert and screw in the two lower screws.
Only install the automatic controller in dry rooms and under the environmental conditions as
described in B.1 ”Technical Data”.
The automatic controller must not be accessible from the back!
B.1.1 Housing base
161
11,8 195,4
9
R4.5
4.4
3333
139,3
n
3.5
169.3
B.1.2 Housing cover
Terminal housing cover
Cover screw

6 • Installation 3110086 EHC20 UK 110515
B.2 Electrical connection
Disconnect the power supply before working on the device and make sure that it cannot be
reconnected! Check that the power is o!
The electrical connection must only be carried out by qualied personnel in compliance with
the applicable laws. The automatic controller must not be put into operation if any damage is
visible on the housing, such as cracks.
Low-voltage cables such as temperature sensor cables must be routed separately from mains
voltage cables. Only put temperature sensor cables into the left side, and the mains voltage
cable into the right side of the device.
Safe isolation of the voltage supply to the automatic controller has been provided, such as
provision for an overheating emergency stop switch.
The cables to be connected to the device may be stripped up to maximum of 55mm and the
sheath should reach into the housing to exactly behind the strain relief.
The automatic controller and VFS sensor must have the same earthing potential. The VFS
sensor has a functional earthing (PELV). The peripheral unit terminal of the automatic
controller must be connected to the the piping system near the sensor.
Terminal instructions
1. Insert a suitable screwdriver into the upper opening and press the lock handle down.
Leave the screwdriver in the opening.
2. Insert the cable into the lower opening.
3. Remove the screwdriver.
B.3 Temperature sensor installation
The automatic controller works with Pt1000 temperature sensors to ensure that the temperature is precisely recorded
so that the unit functions under technically optimal conditions.
The temperature sensor cables must be placed separately from the mains cables and must not,
for example, be placed in the same cables duct!
Place the sensors precisely in the area to be measured! Only use the feeder, tube or ush
sensor for the applicable area of use with the allowed temperature range that corresponds to
each. The thermal conductor must be used during assembly!

Installation• 7
3110086 EHC20 UK 110515
The sensor cables to S7/S8 may be extended to a maximum total length of 30 metres with a
cable that has a diameter of at least 0.75mm². The sensors from S1 to S6 may be extended to a
maximum total length of 10metres with a cable that has a diameter of at least 0.75mm².
Pay attention that no contact resistance occurs while joining the cables!
Connect the VFS direct sensors with the corresponding plug. In order to avoid damage to the
direct sensors, we strongly recommend only placing them in the return ow! Pay attention to
the correct ow direction when assembling the (VFS) direct sensors!
C. Terminal plan and connections
C.1 Terminal housing
The mains side of the terminal housing is protected on the right side by an additional plastic plate.
Before removing the plate, check that the power to the automatic controller has been switched o.
C.2 Terminal plan for electrical connection
max. 12 V
Extra-low voltages
max. 12 VAC/DC
Terminals Connection for
S1 Sensor 1
S2 Sensor 2
S3 Sensor 3
S4 Sensor 4
S5 Sensor 5
S6 Sensor 6
S7 Sensor 7
S8 Sensor 8
V1 0-10 V/PWM
V2 0-10 V/PWM
VFS1 Grundfos Direct Sensor
VFS2 Grundfos Direct Sensor
RC Room controller
SD card slot
for data storage and
updates
Ensure you insert
the card correctly!
The card must
enter without any
resistance, do not
force it into the
slot!
Ethernet (optional)
for linking to an LAN
Potentially
free relay
NO
Normally
open
(closer)
C
Common
(Voltage)
NC
Normally
closed
(opener)
Mains
230 VAC
Mains voltages 230 VAC 50-60 Hz
Terminals Connection for
R1 Switch output 1 (speed)
R2 Switch output 2 (speed)
R3 Switch output 3
R4 Switch output 4
R5 Switch output 5
R6 Switch output 6
N Mains neutral cable N
L External mains line conduc-
tor L
The peripheral unit protective earth
must be connected at the peripheral
unit of the metal terminal block!
V2 V1 S8 S7
VFS2RC VFS1
SD Card
Ethernet
S6 S5 S4 S3 S2 S1 GND R6NC CNO R5 R4 R3 R2 R1 N L
Netz / MainsRelaisPF-RelaisKleinspannungen

8• Connection diagrams 3110086 EHC20 UK 110515
D. Pin-out diagram
D.1 Program 6.1.7 Heat exchanger with bypass damper, one buer memory and mixer.
This diagram shows the following system:
Heat exchanger with bypass damper. A buer memory, a mixer and a circulating pump.
Project:
Material:
Date:
Rev.:
Title:
Rev. No.: Ref.:
Format: A3
Weight:
Approved:
Draw. No.:
Sheet:
PR-0012
Installation
15-01-2014
6.1.9
pmn
DS/EN 22768 m
Unless otherwise specified tolerances are after
0,000 kg
CHR-P
1 of 2
R1
S1
R6
S8
R4
R5
VFS
S3
A1
Place the S8 temperature sensor in the entry of the heat exchanger.
Mount the S3 temperature sensor on the supply pipe immediately behind the circulating pump.
Mount the S1 temperature sensor in the lower part of the buer memory.
VFS is the sensor for heat quantity measurement – optionally available.
A1 is the STB safety temperature limiter. Warning: only use with external sensors!
A2 Passage adjustment valve (provided).
The mixer should be mounted on R4 (brown/black) and R5 (black/brown). See SM230 with MV20/25/32 on page 9 of the
installation guide.
Mount the circulating pump on the R1 terminal.
Mount the bypass engine on the R6 terminal.
The lower terminal strip is the minus pole and/or the neutral point.
V2 V1 S8 S7
VFS2RC VFS1
SD Card
Ethernet
S6 S5 S4 S3 S2 S1
GND
R6NC CNO R5 R4 R3 R2 R1 N L
S8 S3 S1 R4/R5 R1R6
ForsyningRelePF-ReleSvagtstrøm
An STB safety temperature limiter must be mounted in the supply and must close the bypass damper at
a temperature of 100°C!

Connection diagrams • 9
3110086 EHC20 UK 110515
Project:
Drawing Date:
Rev. Date:
Rev.:
Title:
Ref.:
Rauchgastemperatur Vorlauftemperatur Pufferspeicher-
temperatur
Drawing N°:
3110082
Blau
Braun/Schwartz
Schwartz/Braun
STB Thermostat
EHC20 System 6.1.7
TFI B
26-09-13
30-04-14
MischerBypass Pumpe
Temperaturfühlereingang 8
VFS2 Sensor
VFS1 Sensor
Netz / Mains
0-10V Ausgang
0-10V Ausgang
exodraft EHC10/EHC20 Regler
PF-Relais
Relaisausgang 6
Relaisausgang 1
RC stecker
CAN CAN
Temperaturfühlereingang 7 Temperaturfühlereingang 6 Temperaturfühlereingang 5 Temperaturfühlereingang 4 Temperaturfühlereingang 3 Temperaturfühlereingang 2 Temperaturfühlereingang 1 Relaisausgang 5
Relaisausgang 4
Relaisausgang 3 Relaisausgang 2
CCWCW N CCWCW N
LNPE
LNPE LNPE LNPE
U
-S1
U
-S3
U
-S8
L1
N
PE
1 111 12 2222 3 3 34 44 5
CGND GNDGND GNDGND GND GNDGNDGND GND
L
N NN
N
NNNNC NO
PE
PE
PE
PE
PE
PE
PE
PE
R1R2R3R4R5R6S1S2S3S4S5S6S7S8V1V2
1 111 12 2222 3 3 34 44 5
CGND GNDGND GNDGND GND GNDGNDGND GND
L
N NN
N
NNNNC NO
PE
PE
PE
PE
PE
PE
PE
PE
R1R2R3R4R5R6S1S2S3S4S5S6S7S8V1V2
t°

10 • Installation 3110086 EHC20 UK 110515
E. Installation note for 3-way mixing valve
Please pay attention to the installation note during use of the Exodraft SM230 with MV20 three-way mixing valve.
When using a dierent three-way mixing valve, please pay attention to the ow direction during
installation!
E.1 SM230 with MV20/25/32 installation note
Pay attention to the basic setting of the mixing valve and ow direction before installing the MV20/25/32!
The drive axle notch must be in the centre of the valve exit.
Please pay attention to the mixer setting in case of a change in ow direction:
Connect the motor to the valve and screw together. The motor is xed in place by removing the front cover.