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Electrical Heating Thermostat
MH4
Introduction
MH4 is a Z-Wave Plus enabled device for indoor temperature control. It is mainly applied to
control electrical heating systems, such as heating film, heating cable, heater, etc. With the floor
over-heating protection and GFCI (Ground Fault Circuit Interrupter) function, this device works
as a reliable indoor temperature controller. Besides its stable performance, the unique design is
also an attractive feature for end users. Moreover, a built-in Z-Wave module makes it a smart
device which can be operated in any Z-Wave network with other Z-Wave certified devices .
Features：
Tempered glass panel with capacitive touch buttons
With two sensors to detect indoor& floor temperature
Floor overheating protection
GFCI(leakage protection): level 5mA
Multi-working modes to meet various user needs:
Time Period(Schedule) Mode
Comfort Mode
Energy-saving Mode
Vacation Mode
Programmable schedule: 4 periods each day of 7 days; 5+2; 5+1+1
Specification
Power supply: AC120V/AC240V, 60Hz
Max output: 1800W at 120AC ; 3600W at 240AC
Self-consumption: <2W
Temp. format: ℃ /℉ ; Time format: 12h / 24h
Z-Wave frequency: 908.42MHz, 941.42MHz or other customized
Panel dimension: 76*120*20mm
Vertical installation：hole pitch 82mm （American 120 box ）
Safety Information
To protect yourself and others from danger and to protect the device from damage, please read the
safety information before using it.
Important!
A qualified electrician with the understanding of wiring diagrams and knowledge of electrical
safety should complete installation following the instructions.
Before installation, please confirm the real voltage complying with the device’s specification.
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Cut off any power supply to secure the safety of people and device.
During installation, protect the device from any physical damage by dropping or bumping. If
happens, please contact the supplier for maintenance.
Keep the device away from acid-base and other corrosive solids, liquids, gases, to avoid
damage.
Avoid overexertion during operation, to protect device from mechanical damage.
Read all instructions and documentation and save for future reference.
Installation & Wiring
Location:
Thermostat is suggested to be installed indoor, a place with around 4
1/2
to 5 feet height above
the floor where represents the average room temperature. It should be away from direct sunlight,
any cover, or any heat source, to avoid false signal for temperature control.
CAUTION: Cut off power supply at circuit breaker or fuse before installation to avoid fire,
shock or death!
Step 1: Separate the device with a flat-head screwdriver into two parts: the display panel and the
bottom case.
Step 2: Insert all wires into the right terminals and tighten screws. Wiring diagram is shown below.
Step 3: Push the bottom case into the junction box and secure it with two screws, and then mount
the touch panel back.
Step 4: Confirm the device is well mounted, power on and it is ready to operate.
Wiring diagram:
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Note：
Setback (terminals 3&4)：the input terminal controlled by remote; one terminal connect to the
internal power source with a 10K resistor, the other terminal connect to the internal ground
wire.
Relout (terminals 5&6)：the output terminal controlled by remote; inside circuit is a OC
output, it can drive a relay that below 24V directly.The maximum drivable current is 30MA.
The internal circuit is shown as above.
Button & Display
Operation
On/Off operation
ON：When it displays OFF, slide up the ON/OFF button to turn it on. Local time, the
corresponding temperature, working mode and output status will be displayed on the screen.
OFF：In normal working interface, slide down the ON/OFF button to turn it off. It will
display OFF on the screen and all outputs will be closed.
GFCI Test
Enter into GFCI test：In the normal working interface, when the electrical heating is working,
press GFCI button, the icon of GFCI will be displayed on the screen, and the output of
electrical heating is closed, indicator light is on .
Exit from GFCI test: slide the ON/OFF button to turn it off and then turn it on, the device
will back to the normal working interface, the electrical heating begin to output and the icon
of GFCI disappeared.
Note: There is a electric leakage protector inside the thermostat, it’s used to protect the
operator avoid electric shock when the system is damaged. After installed the device, test this
function to make sure the proper operation of it.
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1、To make sure the thermostat is in the mode of heating. Please adjust the set point
temporarily when it necessary.
2、When you press GFCI button, the icon of GFCI will be displayed on the screen, and the
output of electrical heating is closed, indicator light is on ,otherwise, you should turn down the
thermostat and replace it.
Local Time Setting
In shutdown mode, long press button to enter into the Time settings interface. The blinking
icon is the current modifiable item, press or button to set the values; press button
to switch the setting value. When finish the setting, press button as confirm or delay for 10s
without any operation to save all the values and return to the normal working interface
automatically. During setting, press button at any time, it can return to the normal working
interface directly and the values will be saved.
Working Mode Setting
Icon displays on the screen indicates it is in Time Period Mode；
Icon displays on the screen indicates it is in Manual Mode；
Icon displays on the screen indicates it is in Energy-saving Mode；
Icon displays on the screen indicates it is in Vacation Mode；
When the corresponding icon of working mode is blinking, press button to confirm or delay
for 10s without any operation to save the values and return to the normal working interface
automatically.
Temperature Setting
In any mode, press or button to enter into the Set Temp settings interface of the
corresponding mode. The “Set Temp” is blinking.
Press button to decrease the temperature, press button to increase the temperature.
After enter into the interface of Set Temp settings, long press or button to decrease/
increase the temperature continuously.
After finish the settings, press button to confirm or delay for 10s without any operation
to save the values and return to the normal working interface automatically.
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Check the Temperature
In the normal working interface, press and buttons simultaneously, the displayed
temperature will be switched between the room temp and floor temp .
Keypad Lock
In the normal working interface, press and buttons simultaneously to lock the
keypad, at the same time the icon will be displayed on the screen. When the keypad is locked,
you cannot do any operation of it. When the icon of Keypad Lock displays on the screen,
press and buttons simultaneously to unlock the keypad, and the icon will disappear
from the screen, and the keypad is back to its normal state.
Time Period Setting
In the normal working interface, long press button to enter into the Time Period
settings interface. First, the “HOUR”of the first period is blinking.
The blinking item is the adaptable item, press or button to change the values.
In the setting interface, press button to switch the weekday, the switch sequence is
Monday→Tuesday→Wednesday→Thursday→Friday→Saturday→Sunday→Exit.
In the setting interface, press button to switch the item among HOUR, MINUTE, Set
Temp, and Time Period of each day, press button continuously, the time period will be
switched from the 1st period to the 4th period.
During setting, press button to return to normal working interface directly, and the
changed values will be save.
The default setting is as follow:
Output Control
Week\Periods
Period 1 Period 2 Period 3 Period 4
Mon~Fri 5:00 28℃（82
℉）
7:00 24℃（75
℉）
17:00 28℃（82
℉）
22:00 24℃（75
℉）
Sat~Sun 5:00 28℃（82
℉）
9:00 24℃（75
℉）
17:00 28℃（82
℉）
22:00 24℃（75
℉）
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Floor Temperature Control Mode
: Floor Temperature Control, : Room Temperature Control, : Room
Temperature Control with floor high temperature protection.
When the icon displays on the screen indicates the system is in Floor Temperature
Control Mode, and the icon will be displayed beside the temperature value， it indicates the
current detected temperature is the floor temperature. When the detected indoor temperature ≤
the set temperature for -1.5℃，electrical heating will be turned on, and the icon will be
displayed on the screen; when the detected indoor temperature≥ the set temperature， electrical
heating will be turned off, the icon disappeared.
Room Temperature Control Mode
When the icon displays on the screen indicates the system is in Room Temperature
Control Mode, when the icon displays on the screen, it indicates the current temperature that
displayed on the screen is the indoor temperature. When the detected indoor temperature ≤ the
set temperature for 2.5℃, electrical heating will be turned on, and the icon will be displayed
on the screen; when the detected indoor temperature≥ the set temperature, electrical heating will
be turned off, and the icon will be disappeared from the screen.
Room Temperature Control, Floor High Temperature Limit Mode
If the icon displays on the screen, it indicates the system is in the Room Temperature
Control ,Floor High Temperature Limit Mode, when the icon displays on the screen, it
indicates the current temperature that displayed on the screen is the indoor temperature. When the
detected indoor temperature ≤ the set temperature for-2.5℃, electrical heating will be turned on,
and the icon will be displayed on the screen; when the detected indoor temperature ≥ set
temperature, electrical heating will be turned off, and the icon will be disappeared. Press
and buttons simultaneously, the displayed temperature will switch to the floor temperature,
and the icon will display beside the temperature. When the temperature is higher than 45℃
(113℉), the output will be closed, and then the icon will be displayed on the screen to
avoid overheating the floor. When the floor temperature reduced to 40℃(104℉), electrical heating
will be turned on again, and the icon will be disappeared.
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Remote Control Output
When the remote control signal input, the icon of remote is blinking; when the detected
indoor temperature ≤the set temperature for -2.5, electrical heating will be turned on, and the
icon will be displayed on the screen; meanwhile, the Relout start output signals, when the
detected indoor temperature≥ the set temperature, electrical heating will be turned off, and the
icon will be disappeared, meanwhile, the Relout close turn off output signal. The setting
default temperature is 16.5℃(61℉) on the remote control mode.
Notes: Remote signal control output has the highest priority.
Sensor Failure
When sensor failed to work, the icon EEE will display on the screen. The output will be closed.
Cumulative Time of the valve
In shutdown interface, long press button, the cumulative time of the valve will be displayed
on the screen. The cumulative time will reset and restarted when press and buttons
simultaneously.（Unit：min）
Temperature Unit Switching
In shutdown interface, long press and can switch the temperature unit settings.
Z-Wave Operation
Including & Excluding of Z-Wave network
In normal working interface, press & hold to enter interface for inclusion or exclusion
of Z-Wave network. Before device included into network, “- - -” will display on the screen. Then
press once, device will enter learning mode to get a node ID. If inclusion is success, a node
ID will display on the screen in a few seconds.
A node ID can always inform us whether the device is in the network or not.
Note: Follow the same steps to exclude the device from the network.
After inclusion, turn off the device and then turn it on. Now the device is ready to be operated
by controller/ gateway in Z-Wave network.
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Association Group
Thermostat supports 1 association group. A gateway is suggested to associate with this
group. Then if any changes happen, such as: temperature, working mode, etc., the thermostat
will report to this associated device (gateway).
Command Class supported by the device:
COMMAND_CLASS_ZWAVEPLUS_INFO,
COMMAND_CLASS_VERSION,
COMMAND_CLASS_MANUFACTURER_SPECIFIC,
COMMAND_CLASS_DEVICE_RESET_LOCALLY,
COMMAND_CLASS_ASSOCIATION,
COMMAND_CLASS_ASSOCIATION_GRP_INFO,
COMMAND_CLASS_POWERLEVEL,
COMMAND_CLASS_BASIC,
COMMAND_CLASS_FIRMWARE_UPDATE_MD_V2,
COMMAND_CLASS_CONFIGURATION,
COMMAND_CLASS_SENSOR_MULTILEVEL_V5,
COMMAND_CLASS_THERMOSTAT_SETPOINT,
COMMAND_CLASS_THERMOSTAT_MODE,
COMMAND_CLASS_THERMOSTAT_OPERATING_STAT
E,
COMMAND_CLASS_TIME,
COMMAND_CLASS_TIME_PARAMETERS
Note: Basic CC is used to control energy saving mode and comfort mode:
· Basic Set (Value = 0x00) = Set Energy Saving Mode
· Basic Set (Value = 0xFF) = Set Comfort Mode
· Basic Get = Get Report
· Basic Report (Value = 0x00) = Report Energy Saving Mode
· Basic Report (Value = 0xFF) = Report Comfort Mode
The other values besides the two above will be ignored.
Note:
This device supports 4 kinds of modes in Z-Wave: Off mode; Heating mode (Manual);
Energy Saving heating mode (Auto) ; Away heating mode (Vacation).
Users can set these 4 modes via COMMAND_CLASS_THERMOSTAT_MODE. And
COMMAND_CLASS_BASIC can switch among Heating mode & Energy saving heating mode.
COMMAND_CLASS_THERMOSTAT_SETPOINT can be used to set the heating
temperature threshold value in Heating mode or Energy saving heating mode.
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Parameters Settings:
Add Function Byte Options Default
Remark
1
Upload temperature
format automatically
1
0x00Celsius
0x01Fahrenheit
0x02Follow the main display
0x02
2
Upload temperature
value automatically
1
0x00 OFF
0x01 Upload the temperature
difference value only
0x02 Timing upload mode
only
0x03 Upload the difference
value+timing upload mode
0x03
3
Upload temperature
difference
2
Base on 0.1℃unit, 0x0005
by default, 5*0.1℃=0.5℃,
0x0003~0x03E8
0x0005
0.5℃
4
Upload time interval
regularly
2
Base on 1s unit, it suggest to
be set above 30s
0x000A~0xFFFF
0x001E
30S
FF Factory setting 1
0x55 Restore the factory
setting(write only)
Parameters
setting restore
to default
value,
association
groups deleted
FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b)) (USA only)
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
•Consult the dealer or an experienced radio/TV technician for help.
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Configuration of User Parameters (Hidden Menu)
In shutdown interface, press and buttons simultaneously to enter into the parameters
setting interface, then input password 1234 using “Up” button and “Down” button, press to
switch, then press “Confirm” button to enter into the setting interface. Following is the value of
each parameter:
NO. Parameter Default Value Setting Range Note
P1 High Temp Protection 45℃（113℉）
OF/45 ～ 95℃
（113-203℉）
OF： Turn off the floor high
temp protection
P2 Room Temperature Calibration 0（00） -9.5～9.5℃（-16～16℉）
P3 Temperature Backlash Value 2℃（4℉） 0.5～10℃（1-18℉）
P4 Key Volume Level 3 OF/1～9
OF：OFF
1 ～ 9 ： Length of the Key
Volume
P5 Backlight Brightness NO NO/ OF
NO：Always on
OF：Energy Saving of Backlight
P6 Control Mode A-F
A-F/Air/Flo
Air：Ambient Room
Temperature Control Mode
Flo：Floor Temperature Control
Mode
A/F:Room Temperature
Control, with Floor High
Temperature Limit Mode
P7 Time System 24 12/24
12：12-hour time system
24：24-hour time system
P8 Floor Temperature Calibration 0(00) -9.5～9.5℃（-16～16℉）
P9
Backlash Value of Floor Temp
Control
1.5℃(03℉) 0.5～10℃（01～18℉）
P10
Backlash Value of Floor
Protection Temp
5.0℃(09℉) 0.5～10℃（1-18℉）
P11
Temp Setting of Remote
Control Mode
16.5℃(62℉) 5～37℃（41-99℉）
P12 Factory Reset 53 0～99
Set it to 55 and then press S3 to
confirm to set it to Factory
Reset.
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P13 Heating temp increasing speed 5 0-99
P14 Celsius/Fahrenheit OC OC/OF
OC：Celsius
OF：Fahrenheit
（ After modify settings, to
restore the factory settings.）
Troubleshooting
Problem Solution
Thermostat functions but no heat
from the system
1. Check wiring instructions and wire identification
2. If the GFCI is tripped, reset the thermostat with the side switch
3. Check the resistance of the floor warming system. Refer to the cable
manufacturer installation manual
No display
Check wiring connection on the back of the unit
GFCI is tripped
1. Check wiring connections
2. Reset thermostat by switching off then back on
3. Check resistance of the floor warming system. Refer to the cable
manufacturer installation manual
Heat occurs at wrong time
Check the current time and schedule are properly set at AM or PM
Error EEE
Check floor sensor resistance. Change if out of range
1-year Limited Warranty
MCOHome warrants this product to be free from defects in material and workmanship under
normal and proper use for one year from purchase date of the original purchaser. MCOHome will, at its
option, either repair or replace any part of its products that prove defective by reason of improper
workmanship or materials. THIS LIMITED WARRANTY DOES NOT COVER ANY DAMAGE TO
THIS PRODUCT THAT RESULTS FROM IMPROPER INSTALLATION, ACCIDENT, ABUSE,
MISUSE, NATURAL DISASTER, INSUFFICIENT OR EXCESSIVE ELECTRICAL SUPPLY,
ABNORMAL MECHANICAL OR ENVIRONMENTAL CONDITIONS, OR ANY
UNAUTHORIZED DISASSEMBLY, REPAIR OR MODIFICATION. This limited warranty shall not
apply if: (i) the product was not used in accordance with any accompanying instructions, or (ii) the
product was not used for its intended function. This limited warranty also does not apply to any product
on which the original identification information has been altered, obliterated or removed, that has not
been handled or packaged correctly, that has been sold as second-hand or that has been resold contrary
to Country and other applicable export regulations.
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