mobiheat MH19.2ME/Q1 Wiring diagram

V18.4
Art. No: MH-BA-25
Page
Electric mobile heating
units
English translation of original operating
instructions
For type MH19.2ME/Q1, MH20.2E, MH40.2ME/Q1
Two different control units are described in this manual. Please observe the appropriate
instructions for your device in the following sections
3.3.3 Settings for type MHRE control unit
3.3.4 Settings for type MHRE control unit

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Table of contents
Section
1
Important safety regulations
2
Technical data
2.1 MH19.2ME/Q1
2.2 MH20.2E
2.3 MH40.2ME/Q1
2.4 Intended use
3
Setup/commissioning
3.1 Transport
3.2 Setup
3.3 Commissioning
3.3.1 Connection
3.3.2 Filling and venting
3.3.3 Settings for type MHRE control unit
3.3.4 MHRQ1 type control setting
3.3.4.1 Menu overview
3.3.5 Service menu
3.3.5.1 Outdoor temperature sensor / weather-controlled
3.3.5.2 Heating circuit pump run-on
3.3.5.3 Stand-by temperature
3.3.5.4 Min. boiler temperature
3.3.5.5 Max. boiler temperature
3.3.5.6 Switch-on delay for boiler
3.3.5.7 Date / time
3.3.5.8 Reset counter
3.3.6 Menu programs / log data
3.3.6.1 Pre-installed programs
3.3.6.2 Installing your own programs
3.3.6.3 Read log data
3.3.7 User menu
3.3.7.1 Select language
3.3.7.2 Power limit
3.3.7.3 Set clock
3.3.7.4 Factory settings
3.3.7.5 Information
3.3.8 Heating circuit pump setting
3.3.9 Voltage monitoring

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3.3.10 Dismantling
4
Malfunctions: Causes and remedies
4.1 General information
4.2 Error code table for type MHRE
4.3 Error code table for type MHRQ1
4.4 Heating circuit pump
5
Maintenance
5.1 Regular maintenance
5.2 Storage
6
Accessories
6.1 Supplied accessories
6.2 Optional accessories
7
Miscellaneous
7.1 Imprint / Hotline

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Symbols and terms used
All safety and warning notices in this manual have been clearly highlighted. The following
symbols and signal words have been used for warnings.
Danger
Warns you of dangers that could result in personal injury or considerable damage to
property.
Attention
Malfunctions may occur during operation if you do not follow these instructions.
Risk of electric shock
Indicates a situation that may result in electric shock.
Risk of burns
Indicates a situation that may cause burns due to extremely high or low temperatures.
Danger of explosion
Indicates a situation which may result in an explosion.
Warning: Flammable material
Tip
Reference to useful information when handling the device
Information
Abbreviations:
STB
Safety temperature limiter
MAG
Diaphragm expansion vessel
KFE
Fill and drain valve
VL
Flow
RL
Return
HK
Heating circuit
TWW
Warm drinking water
mWS
Meter water column

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1. Important safety regulations
IMPORTANT SAFETY REGULATIONS FOR BOILERS
READ THIS MANUAL CAREFULLY BEFORE CONNECTING THE BOILER TO THE HEATING
CIRCUIT. Installation and connection may only be carried out by qualified personnel.
Danger due to misuse!
Use the device only for the purpose described in this manual. Otherwise you may
endanger yourself or damage the device.
Danger due to unauthorised modifications!
Never modify the unit or any part of it without obtaining a clearance certificate from
the manufacturer. Otherwise you may put yourself and others at risk.
Serious injuries and/or considerable damage to property could result.
Danger for unauthorised operating personnel!
Only work with the device if you have been instructed accordingly and have
understood the contents of these operating instructions.
Never bridge the settings of the safety devices.
The device must not be used in hazardous areas
The electrical power supply must be disconnected before any maintenance work
is carried out on the unit.
Danger from fire and smoking!
Never smoke or light a fire on or in the system while you are working on or in the
heating system.
Otherwise you may put yourself at risk. This could result in serious injuries or
considerable damage to property.
Risk of burns!
During and immediately after operation, do not touch the device or any internal
components.
Risk of electric shock!
Work on electrical components must be carried out by qualified personnel in accordance
with local regulations.

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2. Technical data
Please refer to the following tables for the respective technical data and connected
loads for your model.
2.1 MH19.2ME/Q1
Dimensions (W x D x H):
600 mm
580 mm
1220 mm
Weight (including transport
trolley):
approx. 58 kg
Circulating pump:
max. 3.0 m3/h, max. 5.5 mWS
Heating connection:
VL/RL DN 25, bayonet lock
Volume MAG:
10 litres
Recommended operating
pressure:
1.5 –2.0 bar (safety valve = 3.0 bar)
Degree of protection:
IP 44
Heating mode:
20 –80°C
Heating capacity:
3 kW
11 kW
19 kW
Electrical connection:
CEE 16 A
/230V/50Hz/1
CEE 16 A
/400V/50Hz/3
CEE 32 A
/400V/50Hz/3
Control unit:
MHRE
MHRQ1
Digital
Digital and programmable
Screed heating programs
Screed heating programs:
-Screed curing DIN 1264-4
-Functional heating DIN 1264-4
-Screed curing DIN 1264-4
-Functional heating DIN 1264-4
-OE standard B 3732
-OE standard B 2242-2
-Suissetec Cement
-Suissetec Calcium Sulphate
CaSO4
2.2 MH20.2E
Dimensions (W x D x H):
600 mm
580 mm
1220 mm
Weight (including transport
trolley):
approx. 58 kg
Circulating pump:
max. 3.0 m3/h, max. 5.5 mWS
Heating connection:
VL/RL DN 25, bayonet lock
Volume MAG:
10 litres
Recommended operating
pressure:
1.5 –2.0 bar (safety valve = 3.0 bar)
Degree of protection:
IP 44

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Heating mode:
20 –80°C
Heating capacity:
19 kW
Electrical connection:
CEE 32 A/400V/50Hz/3

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The mobile electric heating units are compact and fully functional mobile electric heating units for
universal use as emergency heating in the event of heating faults, when working on a heat
generator, for frost protection, for screed heating or for preventive/initial heating, e.g. to prevent
icing up of a geothermal heat pump.
Control unit:
MHRE
MHRQ1
Digital
Digital and programmable
Screed heating programs
Screed heating programs:
-Screed curing DIN 1264-4
-Functional heating DIN 1264-4
-Screed curing DIN 1264-4
-Functional heating DIN 1264-4
-OE standard B 3732
-OE standard B 2242-2
-Suissetec Cement
-Suissetec Calcium Sulphate
CaSO4
2.3 MH40.2ME/Q1
Dimensions (W x D x H):
670 mm
585 mm
1260 mm
Weight (including transport
trolley):
approx. 70 kg
Circulating pump:
max. 3.0 m3/h, max. 5.5 mWS
Heating connection:
VL/RL DN 25, bayonet lock
Volume MAG:
12 litres
Recommended operating
pressure:
1.5 –2.0 bar (safety valve = 3.0 bar)
Degree of protection:
IP 44
Heating mode:
20 –80°C
Heating capacity:
8 kW
16 kW
40 kW
Electrical connection:
CEE 16 A
/400V/50Hz/3
CEE 32 A
/400V/50HZ/3
CEE 63 A
/400V/50Hz/3
Control unit:
MHRE
MHRQ1
Digital
Digital and programmable
Screed heating programs
Screed heating programs:
-Screed curing DIN 1264-4
-Functional heating DIN 1264-4
-Screed curing DIN 1264-4
-Functional heating DIN 1264-4
-OE standard B 3732
-OE standard B 2242-2
-Suissetec Cement
-Suissetec Calcium Sulphate
CaSO4
2.4 Intended use

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3.Setup/commissioning
3.1 Transport
Transport by forwarding agency
•Never lift or lash the device by the fittings.
•Store the device in a dry, frost-free and dust-protected place.
•Disconnect the device from the power source for storage.
•After use, store the device only in a completely empty condition. In this way you
ensure that no damage occurs to the device during transport and storage.
3.2 Setup
•Ensure the device is set up on firm and level ground.
•Secure the device against rolling away.
3.3 Commissioning
Installation and commissioning may only be carried out by qualified personnel
3.3.1 Connection
•Check whether the ball valves with thermometer handle are closed (Fig. 1,
Section 3.3.1). Close these if necessary.
•Connect the connecting pipes for the return (blue, Fig. 1, Section 3.3.1) and
flow (red, Fig. 1, Section 3.3.1) to the on-site heating system.
(Figure
1)

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3.3.2 Filling and venting
•Attach a vent line to the flow pipe (Pos. 4, Fig. 2, Section 3.3.2).
•Attach a water supply line to the fill and drain valve (Pos. 6, Fig. 2, Section 3.3.2).
•Open the fill and drain valve for the water supply line and bleed line.
•Fill the device until there is no more air in the device.
•Close the fill and drain valve at the flow (Pos. 4, Fig. 2, Section 3.3.2) and pay
attention to the indicated pressure (Pos. 5, Fig. 2, Section 3.3.2). The
recommended operating pressure is 1.5 –2 bar.
•Connect the device to the power supply (Pos. 7, Fig. 2, Section 3.3.2).
•Set the current selector switch to the desired connection (Pos. 7, Fig. 2, Section
3.3.2).
(Figure
2)
•Work on electrical components must be carried out by qualified personnel in
accordance with local regulations.
•Never bleed or fill the device when it is connected to the power supply.
•If you operate the device with deionised water, the conductivity of the water may
be too low in rare cases. The error "Air in boiler" appears. This is usually only the
case for conductivity below 8–10 µS. If required, you can retrofit your device with
a sensor for deionised water.

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10
3.3.3 Settings for the type MHRE control unit
•The heating circuit pump starts.
•A rotating running light appears in the display (Fig. 3, Section 3.3.3).
•The LED operating display flashes at position "0" (Fig. 3, Section 3.3.3).
•The "boiler ventilation" LED indicator lights up green. (Fig. 3, Section 3.3.3)
•The device is ready for operation.
(Figure 3)
•If the LED indicator "U<" lights up red, Have the on-site power supply
checked by a specialist.
•If the LED indicator "Air in boiler" lights up red and the heating circuit pump
does not start, the boiler is not sufficiently vented. Disconnect the device from
the power supply and bleed the device as described in Section
3.3.2.
•Automatic heating mode
•Set the switch (Fig. 4, Section 3.3.3) to on.
•The LED power indicator (Fig. 4, Section 3.3.3) lights up permanently. The
actual temperature is shown on the display.
(Figure 4)
•Use the selector switch (Fig. 5, Section 3.3.3) to select your desired
screed program.
(Figure 5)

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•Tap on the temperature selector switch (Fig. 6, Section 3.3.3) to display the
target temperature and the remaining running time of the program.
(Figure 6)
•If one of the selected heating programs is manually interrupted, the
program is stopped and starts from the beginning.
•If a heating program is active, the display alternates between "PR" and the
boiler temperature.
•You cannot intervene in the program sequence.
•In case of power failure, the current point within the heating program is stored
for one hour. If the power supply is active again, the heating program
automatically resumes from this point.
•Manual heating mode
•Switch on the device.
•Press the temperature selection button up or down for 5 seconds until the
temperature indicator on the display flashes. (Fig. 7, Section 3.3.3)
•Set the desired temperature using the temperature selection button.
(Figure 7)

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3.3.4 Setting the MHRQ1 type controller
Installation and commissioning may only be carried out by qualified personnel
1Power button
2USB port
3STB
4Boiler temperature
5Outdoor temperature (only for units with outdoor temperature sensor)
6Number of active heating stages
7Heating circuit pump in operation
8Date
9Operating mode: Manual M or screed heating program
10 Time
11 Multifunction key
12 Multifunction key
13 Enter key / select program
14 Back / request program info
15 Pressure display
16 Frost protection active

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3.3.4.1 Menu overview
1. Service menu
Outdoor temperature sensor / weather-controlled
Heating circuit pump run-on
Stand-by temperature
Min. boiler temperature
Max. boiler temperature
Switch-on delay for power levels
Date / time
Delete log data
Reset counter
Reset to factory settings
2. Programs/log data menu
Pre-installed programs
Installing your own programs
Read log data
3. User menu
Select language
Power limit
Set clock
Factory settings
Information
Setting the boiler temperature
Press the arrow keys (11 and 12) up or down to set the desired
temperature. Confirm the change with the Enter key (13).
Select program
Press the Enter key (13) to select the heating program. Use the
arrow keys (11 and 12) to set the desired program and confirm
with the Enter key (13).
Press the Enter key (13) to cancel the program. Use the keys (11
and 12) to select yes or no and confirm your selection with the
Enter key (13).
Back / query remaining program time
Press the Back key (14) to return to the previous page in the
menu.
Press the Back key (14) to query the remaining program
time.

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Boiler temperature
Service menu
Press the buttons (13 and 14) for at least 5 seconds to call
up the service menu.
Enter the PIN by pressing the following key combination
334112:
2 x 1x 2x 1x
3.3.5 Service menu
3.3.5.1 Outdoor temperature sensor / weather controlled
Setting the heating characteristic (only for devices with outdoor temperature sensor)
Preset characteristic curves
Outside
temperature

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•Underfloor heating ON →Heating characteristic 0.1 –0.9
•Underfloor heating OFF →Heating characteristic 1 –3
•Select the desired heating characteristic with the arrow keys (11 and 12)
and confirm with the Enter key (13).
•The heating characteristic can only be set when the outdoor sensor is active.
•This function is not possible with mobile devices.
3.3.5.2 Heating circuit pump run-on
•0 –15 minutes
•Select the desired time with the arrow keys (11 and 12) and press Enter
(13) to confirm.
3.3.5.3 Stand-by temperature
•10°C –50°C
•Select the desired stand-by temperature with the arrow keys (11 and 12) and
confirm with the Enter key (13).
3.3.5.4 Min. boiler temperature
•You can set the minimum boiler temperature to 15°C –50°C.
•Select the desired temperature with the arrow keys (11 and 12) and
confirm with the Enter key (13).
3.3.5.5 Max. boiler temperature
•You can set the maximum boiler temperature to 50°C –90°C. (Max.
operating temperature 80°C)
•Select the desired temperature with the arrow keys (11 and 12) and
confirm with the Enter key (13).
3.3.5.6 Switch-on delay for power levels
•You can set the time between switching on two power levels to between 15
and 360 seconds.
•Select the desired temperature with the arrow keys (11 and 12) and
confirm with the Enter key (13).
3.3.5.7 Date / time
•Select the desired date or time with the arrow keys (11 and 12) and confirm
with the Enter key (13).

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3.3.5.8 Reset counter
•You can reset the operating hours of the individual heating elements. The
total operating time of the boiler cannot be reset.
•Select the desired heating element or all heating elements with the arrow keys
(11 and 12) and confirm with the Enter key (13). Select YES or NO with the
arrow keys (11 and 12) and confirm with Enter.
3.3.6 Programs/log data menu
3.3.6.1 Preinstalled programs
MHRE + MHRQ1
Only with MHRQ1
Day
Screed curing Functional
heating
OE
standard
OE
standard
Suissetec Cement
Suissetec
DIN 1264-4 DIN 1264-4
B 3732
B 2242-2
Calcium
sulphate
CaSO4
1
25°C 25°C
20°C
20°C
20°C
20°C
2
30°C 25°C
25°C
25°C
20°C
20°C
3
35°C 25°C
30°C
30°C
20°C
20°C
4
40°C 50°C
35°C
35°C
20°C
20°C
5
45°C 50°C
40°C
40°C
20°C
20°C
6
50°C 50°C
45°C
45°C
20°C
20°C
7
50°C 50°C
45°C
50°C
20°C
25°C
8
50°C
45°C
50°C
20°C
25°C
9
50°C
35°C
50°C
20°C
25°C
10
50°C
25°C
40°C
20°C
50°C
11
50°C
30°C
20°C
50°C
12
50°C
20°C
20°C
50°C
13
50°C
20°C
20°C
50°C
14
50°C
20°C
20°C
15
50°C
20°C
16
50°C
20°C
17
45°C
20°C
18
35°C
20°C
19
25°C
20°C
20
20°C
21
25°C
22
25°C

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23
25°C
24
50°C
25
50°C
26
50°C
27
50°C
Program terminated:
25°C
3.3.6.2 Installing your own programs
Create program file
•Download and install the Windows app MHLogs from www.mobiheat.de on
your PC or notebook.
•Start the MHLogsprogram.
•In the main menu, click on
•Click the New Program button.
•Enter the desired name for the program.
•Enter the number of days for your program.
•In the Temperatures line, insert your desired temperatures and separate
them with a comma without spaces.
•Insert an empty USB stick into a free USB slot. (The USB stick must be formatted
as FAT32 ).
•Click on Export and select the USB stick as the storage location.
•Close the program.
•After the message Update successful is displayed, you can remove the
USB stick.
•Connect the USB stick to the control unit (port 2).
•Use the arrow keys (11 and 12) to select Transfer Setup Files and confirm
with Enter. (13)
3.3.6.3 Reading out log data
•Connect a USB flash drive
•If setup files are available, use the arrow keys (11 and 12) to select log data onto
USB and confirm with the Enter key (13).
•If there are no setup files, the log data is automatically loaded onto USB.

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•Create log.
•Connect the USB stick to your PC or notebook.
•Start the MHLogsprogram.
•Click in the menu bar on
•Select the folder with your recordings on the USB stick.
•By double-clicking on the recording in the MHLogs program, you can view the
recording as text and graphics.
•To create a PDF log, enter your company data under (in the
main menu) and then select a recording. On the menu, click on , fill
out the form, and then click Save log as PDF.
3.3.7 User menu
3.3.7.1 Select language
•Select the desired language with the arrow keys (11 and 12) and confirm with the
Enter key (13).
3.3.7.2 Power limitation
•Select the desired number of heating elements with the arrow keys (11 and 12)
and confirm with the Enter key (13).
3.3.7.3 Setting the clock
•Set the desired time with the arrow keys (11 and 12) and confirm with the
Enter key (13).
3.3.7.4 Factory settings
•Select yes or no with the arrow keys (11 and 12) and confirm with the Enter key
(13).
3.3.7.5 Information
•Software version is displayed.
•Use the arrow keys (11 and 12) up or down to display the operating
hours.

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3.3.8 Setting the heating circuit pump
- Heating circuit pump
MH19.2ME/Q1
- Heating circuit pump MH20.2E
- Heating circuit pump
MH40.2ME/Q1
•If the rooms are not heated sufficiently, the speed of the pump may be too low.
In this case, switching to a higher speed is necessary. If the pump is set to a
speed that is too high, flow noises are generated in the pipes and especially at
throttled thermostatic valves. They can be switched to a lower speed by means
of a rotary knob on the terminal box: left for minimum and right for maximum
speed (Fig. 8, Section 3.3.8).
(Figure
8)