EWELLY EW-802 Manual

版本：802.18.11.01
Microcomputer Thermostat Serial
《 》EW-802 Directions
。
This product is mainly used in solar water heater equipment, the use of
the temperature difference and temperature to control the output.
This product has three output controls. One way to control the temper-
ature difference between the two temperature zones. When the temperature
difference reaches the set value, the water pump cycle is automatically
operated to balance the temperature in the two temperature zones. The second
way controls electric heating. When the solar heating fails to exceed the
heating temperature difference of the set temperature, the electric heating
system automatically starts heating to the set temperature and automatically
thermostats within the temperature difference control range. The third way to
control the water valve, automatically add water and automatically stop adding
water when there is water shortage.。
1. ：AC220V ±10％ 50HZ/60HZ
2. Output ：5A/220V/AC
3. ：≤3W
4. ：-10℃ ～50℃ RH≤90％
5. Control of heating：2℃ ～99℃
6. Control of thermal start-up：3℃～50℃
7. Resolution：1℃ Accuracy：±1℃
8. I two-ways sensors，20KX1.5mX2
ne water level probe
9. ：72(L)×(H)×(D)mm
Operating voltage
Load
Power Consumption
Working environment
Overall Dimension 54 88
O
10. Rail mounting
nput signal:
When two temperature sensor detects a
temperature of two zones, the difference is
greater than the value of the temperature
difference between the set start value, the
circulation pump relay ON, temperature
difference setting range: temperature of
the pump stopped+1 ℃ ~ 50 ℃.
Start-up temperature difference
Temperature difference
When the set temperature is reached,
the heating is stopped, and the
difference between the electric heating
is restarted after the temperature is
back. Temperature hysteresis setting
range: 1 °C ~ 20 °C.
High temperature zone temperature correction
Low temperature zone temperature correction
When the thermostat detects the
temperature of the high temperature
zone and the actual value error, this
feature can be amended. Correction
range: -10 ℃ ~ 10 ℃.
When the thermostat detects the
temperature of the low temperature
zone and the actual value error, this
feature can be amended. Correction
range: -10 ℃ ~ 10 ℃.
Sensor error self-test function
The “EH” symbol is displayed when
the high temperature zone sensor is
opened. The "heating" relay is
disconnected, the "pump" relay is
energized, and the "pump" indicator is
illuminated.
The “EH” symbol is displayed when
thelow temperature zone sensor is
opened. The "heating" relay is
disconnected, the "pump" relay is
energized, and the "pump" indicator is
illuminated.
●In non-setting state, press to check the current temperature
in the high temperature zone.
Temperature difference of the pump stopped
When the temperature difference between
the two sensors is less than this value, the
circulation pump stops.
Range 1 ℃ ~ started temperature difference-1 ℃
Note: When difference of the pump stops setting “0”,
once the circulation pump relay ON, circulation
pump not stopped.。
Heating temperature difference
High temperature zone must be higher
than the setting temperature difference.
Equal or less than this value automatically
start heating control. Heating temperature
range:0℃ ～20℃ 。
EW-MH802
Ewelly
EW-M H106
Ewelly
EW-M H10 6
Ewelly
EW-M H106
Ewelly
EW-M H10 6
Ewelly
EW-M H10 6
Ewelly
EW-M H106
Ewelly
EW-M H106
Ewelly
EW-M H10 6
Ewelly
EW-M H10 6
Ewelly
When the water level is lower than the low
water level value, the “LL” symbol is
displayed alternately with the low
temperature zone temperature, while the
“watering valve” relay is sucked and added
with water; the “heating” relay and the
“water pump” relay are disconnected.
EW-M H10 6
Ewelly
●In the non-setting state, hold 6 seconds, the display will flash
and the factory parameters will be restored.
Heating load indication
Circulating pump
Water
valve
Low temperature zone
temperature
Technical Specifications
Panel Diagram
1.The voltage must accord with controller's demand.
The voltage's deviation is no more than ±10%.
2.The loop of sensor is possible to keep away from the
loop of power.
3.Differentiate sensors, power lines, and output relays.
Demand of install
1. Low temperature zone temperature settings: Press displays the
temperature of low temperature zone, press or to change the
controlling temperature. Without pressing any key when finished operating，it
will automatic save memory setting parameters after six seconds.
2.Parameter setting: Holding and after six seconds to enter Setup,
the corresponding indicator flashes, more than once every press to run the
next function indicators, then press or to change the parameters for
each function. Without pressing any key when finish operation, it will
automatic save memory setting parameters after six seconds.
Brief on Controlling Procedure

Note: When the temperature difference is set at 0, the electric power is entered
into the heating state.
Ewelly
220V/AC
Heating
Pump
High temp.
Sensor
Low temp.
Sensor
EW-MH1 06
Low
wate r level
dete ction
Water valve
Note: the output has a high voltage of 220V
Output load: 5A 220V/AC
●Heating: When the instrument satisfies the following conditions: ①High temperature zone temperature ≤ "low temperature zone set temperature" +
"heating temperature difference";②Low temperature zone temperature ≤ "low temperature zone set temperature" - "temperature difference",the "heating" relay is
absorbed and the "heating indicator" is ON.
●Stop heating: When the low temperature zone temperature ≥ "low temperature set temperature" or "high temperature zone temperature" ≥ "low temperature set
temperature" + "heating temperature difference". Then the "heating" relay is turned off and the "heating indicator" is turned off.
●Pump operation: when the "high temperature zone temperature" - "low temperature zone temperature" ≥the set "start-up temperature difference". "Pump" relay ON,
"pump indicator light" ON.
●Pump stop: When "high temperature zone temperature" - "low temperature zone temperature" ≤ setting of "stop pump temperature difference". The "water pump"
relay is OFF and the "water pump indicator" is OFF.
●Automatic watering: When the water level is lower than the “low water level detection” position, the “watering valve” relay is closed, and the “LL” and “low temper-
ature zone temperature” are displayed alternately. The “watering valve indicator” is ON.
●Stop adding water: When the water level is higher than the “high water level detection”, the “watering valve” relay is OFF and the “watering valve indicator” is OFF.
Note: If water level detection is not required, the high and low water level detection and the water level common port can be shorted together.
Wiring Diagram
High
wate r level
dete ction
Wate r level
publ ic port
Lights NO.Function Setting range
Ex-factory
Value
Unit
NO.1Indicator
NO.1.2 Indicator
NO.2 Indicator
NO.3 Indicator
NO.4 Indicator
Temperature difference
start-up
Temperature
difference
High temperature
correction
Low temperature
correction
Temp.difference
of stopped pump+1～50
1～20
-10～10
-10～10
5
5
0
2
0
℃
℃
℃
℃
℃
Stop the pump
temperature
1～temp.difference
started-1
Parameters for Procedure
NO.3.4 Indicator Heating temperature
difference 0～20 ℃
5
Feature Descriptions
Failure Causes Precautions
No display when power
is on.
Check if the power is broken or the
thermostat failture. 。
Check power supply and change fuse.
Check if the input voltage is right or
change the thermostat with our distributor.
Displaying but machine
doesn't work
The setting temperature is lower than the
present temperature.
The heat protector is open circuit because the
pressure is over loads.
Reset the necessary controlling temperature.
Check the reasons for overload and overheating.
After the trouble is solved, restart to work.
Displayed temperature is
unstable or there exists
misplay.
The sensor is interfered; or poor wiring;
or Together with other power cord bundle；
or line damage.
Separate sensor wiring with power cables
or change shielded lines or check if the contact
is tight or not.
Measurement error between
current temperature and
displayed.
The installation position of the sensor is not
correct; or the sensor's wiring is too long and
its resistance is over; or the wiring connected
poor; or the sensor is damaged
All sensors should be corrected at their locations.
Enlarge the cross section of the expanded wires.
Make sure the wires sealed is good. or Change the
sensor.
Machine does not stop
when the temperature
reaches.
The sensor is not correctly installed and cannot
measure the correct temperature. Compressor
contactor fails.
Check if the sensor has accurately measured
the temperature or not. Change compressor
contactor.
Relay work with overload
“EH” or “EL” is displayed
Return difference value is too small or the
setting for pressure protection is not correct.
The sensor is opened or shorted circuit.
Reset and enlarge return difference value. Adjust
setting for pressure protection.
Check to see if the sensor wiring has good contact
with coupling end or not.
Trouble shooting
Warnings
1. Please read this product instruction carefully and connect input/output
plugs of power & sensor to the corresponding sockets strictly by following
connection diagram, otherwise the usage & operations will be affected.
Check again to make sure there is no mistake. Tighten all the screw of
connection plugs again, and then connect it to the power for running.
2. Keep away this product from moist or corrosive air and high magnetic
field. Otherwise the normal operation of this product will be affected.
.3. All our products have passed strict quality inspections before leaving
factory. We provide one-year quality guarantee (which is limited to product
itself ,and is not responsible for any other joint and several liability) period
for this product.
Guan gzhou Eliw eli Auto con trol Tec h. Co., Ltd.
http://www.eliweli.com
If the products including but not limited to, the following is not the
product itself quality problem caused by the damage, Install and use
under the do not conform to the safe environment; That the load capacity
is beyond the scope of product is allowed; Products by users to
disassemble and change, change the internal components, etc.,We will
not be so and damaged products provide a replacement and maintenance
services, regardless of whether its in the quality assurance period;
Meanwhile, we will not assume so direct or indirect losses caused by the
liability to pay compensation.
Product warranty date on the case is important basis of product
quality assurance. Appeared including but not limited to full filling
without permission, to change, to replace lost, damaged, scratched, dirty,
and so on, we will not provide a replacement and maintenance services
for these products.
If you have any doubt or problem concerning the electronic
temperature or humidity controller made by us, please contact our
distributors and we will provide you high-quality after-sale services.
Thanks!