MCOHome MH4-US User manual

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Electrical Heating Thermostat
MH4-US
Introduction
MH4-US is a Z-Wave 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
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.
Cut off any power supply to secure the safety of people and device.

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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 41/2 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.
Comfort Mode
Time Peiod Mode Energy-saving Mode
Vacation Mode
Floor High Temperature Limit Alarm
Floor Temp Control
Room Temperature Control
Floor High Temperature Limit
S1:Up
S2:Down
S4：Mode Switch Button
S3:Local Time/ Time
Period Set Button S5：Confirm
Button/Check the Valve
Cumulative Time
ON/OFF
GFCI Test
Red Indicator Light
Keypad Lock
Remote Icon
Week
Icon of each
Time Period Local Time
GFCI
Electrical Heating
Celsius
Fahrenheit
Temperature
Set Temp
Indoor Temp
Floor Temp
Room Temp Control

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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.
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 normal working interface, long press button for 3s to enter into the Time settings interface.
Firstly, “WEEK” is blinking, press or button to set the values;
When finish the setting of WEEK, press button to switch to HOUR, “HOUR”is blinking,
press or button to set the values;
When finish the setting of HOUR, press button to switch to MINUTE, “MINUTE”is
blinking, press or button to set the values;
When finish the setting of MINUTE, press button 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
In normal working interface, short press button to enter into the Working Mode settings
interface. The working mode will be changed by every press of button. Press button
continuously, all the working modes will be switched cyclically.
Icon displays on the screen indicates it is in Time Period Mode；
Icon displays on the screen indicates it is in Comfort Mode；
Icon displays on the screen indicates it is in Energy-saving Mode；
Icon displays on the screen indicates it is in Vacation Mode；

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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.
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, short 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

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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
Floor Temperature Control Mode
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
Week\Periods
Period 1 Period 2 Period 3 Period 4
Mon~Fri 5:00 82℉7:00 75℉17:00 82℉22:00 75℉
Sat~Sun 5:00 82℉9:00 75℉17:00 82℉22:00 75℉

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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℃,
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 , electrical heating will be turned on
again, and the icon will be disappeared.
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
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）
Z-Wave Operation
Including & Excluding of Z-Wave network
Under the shutdown state, press & hold S1 to enter interface for inclusion or exclusion of
Z-Wave network. Before device included into network, “- - -” will display on the screen. Then
press S4 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_BASIC;
COMMAND_CLASS_THERMOSTAT_SETPOINT;
COMMAND_CLASS_THERMOSTAT_MODE;
COMMAND_CLASS_THERMOSTAT_OPERATING_STATE;
COMMAND_CLASS_SENSOR_MULTILEVEL;
COMMAND_CLASS_ASSOCIATION;
COMMAND_CLASS_VERSION;
COMMAND_CLASS_MANUFACTURER_SPECIFIC
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.
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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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.