Solar SR530C8Q User manual

Science and Technology Create Perfection
Read the instruction carefully please before operation!
Installation and Operating Manual
SR530C8/SR530C8Q
Solar Controller
For Split Pressurized Hot Water System

Operation manual of solar water controller SR530C8/SR530C8Q
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Contents
Contents
Contents----------------------------------------------------------------------------------------------------1
1. Safety information ----------------------------------------------------------------------------------3
1.1 Installation and commissioning -----------------------------------------------------------------3
1.2 About this manual ----------------------------------------------------------------------------------3
1.3 Liability waiver ---------------------------------------------------------------------------------------3
1.4 Important remark------------------------------------------------------------------------------------4
1.5 Description of symbols----------------------------------------------------------------------------4
1.6 Description of operation button------------------------------------------------------------------4
2. Installation --------------------------------------------------------------------------------------------5
2.1 Installing the controller-------------------------------------------------------------------5
2.2 Preparing before wire connection ---------------------------------------------------------------6
2.3 Power connection ----------------------------------------------------------------------------------6
2.4Terminal connection --------------------------------------------------------------------------------7
3. Commissioning--------------------------------------------------------------------------------------8
3.1 Set time/ week------------------------------------------------------------------------------------8
3.2 Menu structure-------------------------------------------------------------------------------------10
3.3Menu description-----------------------------------------------------------------------------------11
3.4 System description--------------------------------------------------------------------------------12
4. Controller functions-----------------------------------------------------------------------13
4.1 Access main menu -------------------------------------------------------------------------------13
4.2 Access submenu ---------------------------------------------------------------------------------13
4.3 Main menu DT O & DT F Temperature difference function-----------------------------14
4.4 Main menu-THET timing heating------------------------------------------------------- 15
4.5 TEMP Temperature main menu----------------------------------------------------------------18
4.5.1 EM Emergency collector temperature
（emergency switch-off temperature of collector）----------------------------------19
4.5.2 CMX Maximum limited collector temperature (collector cooling function)---19
4.5.3 CMN low temperature protection of collector---------------------------------------20
4.5.4 CFR frost protection of collector --------------------------------------------------21
4.5.5 SMX Maximum temperature of tank ----------------------------------------22
4.5.6 REC Tank re-cooling function----------------------------------------------------------22
4.5.7 C-F Celsius and Fahrenheit temperature transferring --------------------------23
4.6 FUN Auxiliary function--------------------------------------------------------------------------23
4.6.1 DVWG Anti-Legionella function --------------------------------------------------------24
4.6.2 CIRC Temperature controlled hot water circulation pump------------------------25
4.6.3 nMIN Solar circulation pump speed adjusting (RPM speed controlling)-------26
4.6.3.1 DTS Standard temperature difference

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(for circuit pump’s speed adjusting)----------------------------------------------26
4.6.3.2 RIS Temperature increase rate
(for circuit pump speed adjusting)-----------------------------------------------27
4.6.4 OHQM Thermal energy measuring-----------------------------------------------------27
4.6.4.1 FMAX Flow rate---------------------------------------------------------------------------28
4.6.4.2 MEDT Type of heat transfer liquid----------------------------------------------------29
4.6.4.3 MED% Concentration of heat transfer liquid -----------------------------29
4.6.5 INTV Pump interval function-------------------------------------------------------------30
4.6.5.1 tSTP Pump interval- time--------------------------------------------------------------31
4.6.5.2 tRUN Pump running time -------------------------------------------------------------31
4.6.6 BYPR High temperature by-pass function
(tank temperature automatically adjusting)-----------------------------------------31
4.7 HND Manual mode---------------------------------------------------------------------------------32
4.8 PASS Password setting-------------------------------------------------------------------------33
4.9 LOAD Recovery to factory setting------------------------------------------------------------34
4.10 ON/OFF button------------------------------------------------------------------------------------35
4.11 Holiday function-----------------------------------------------------------------------------------35
4.12 Manual heating-----------------------------------------------------------------------------------36
4.13 Temperature query function-------------------------------------------------------36
5. Protection function ------------------------------------------------------------------------------37
5.1 Memory Protection-------------------------------------------------------------------------37
5.2 Anti-dry heating Protection ------------------------------------------------------------------37
5.3 Screen protection----------------------------------------------------------------------------------37
6. Troubles Shooting--------------------------------------------------------------------------------37
6.1 Trouble protection ---------------------------------------------------------------------------------37
6.2 Trouble checking ----------------------------------------------------------------------------------38
7. Quality Guarantee ---------------------------------------------------------------------------------40
8. Technical data --------------------------------------------------------------------------------------41
9. Delivery scope--------------------------------------------------------------------------------------42
10. Device matchable to this controller---------------------------------------------------------42

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1. Safety information
1.1 Installation and commissioning
-• When laying cables, please ensure that no damage occurs to any of the
constructional fire safety measures presented in the building.
• The controller must not be installed in rooms where easily inflammable gas mixtures
are present or may occur.
• The permissible environmental conditions can’t be exceeded at the site of
installation.
• Before connecting the device, make sure that the energy supply matches the
specifications that controller requires.
• All devices connected to the controller must conform to the technical specifications
of the controller.
• All operations on an open regulator are only to be conducted cleared from the power
supply. All safety regulations for working on the power supply are valid.
• Connecting and /or all operations that require opening the regulator (e.g. changing
the fuse) are only to be conducted by specialists.
1.2 About this manual
This manual describes the installation, function and operation of a solar thermal
controller.
When installing the remaining components e.g. the solar collectors, pump assemblies
and the storage unit, are sure to observe the appropriate installation instructions
provided by each manufacturer. Only trained professional personnel may only perform
installation, electrical connection, commissioning and maintenance of the device. The
professional personnel must be familiar with this manual and follow the instructions
contained herein.
1.3 Liability waiver
The manufacturer cannot monitor the compliance with these instructions or the
circumstances and methods used for installation, operation, utilization and
maintenance of this controller. Improper installation can cause damages to material
and persons. This is the reason why we do not take over responsibility and liability for
losses, damages or cost that might arise due to improper installation, operation or
wrong utilization and maintenance or that occurs in some connection with the
aforementioned. Moreover we do not take over liability for patent infringements or

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infringements –occurring in connection with the use of this controller- on third parties
rights. The manufacturer preserves the right to put changes to product, technical date
or installation and operation instructions without prior notice. As soon as it becomes
evident that safe operation is no longer possible (e.g. visible damage). Please
immediate take the device out of operation. Note: ensure that the device cannot be
accidentally placed into operation.
1.4 Important remark
We have carefully checked the text and pictures of this manual and provided the best of
our knowledge and ideas, however inevitable errors maybe exist. Please note that we
can not guarantee that this manual is given in the integrity of image and text, they are
just some examples, and they apply only to our own system. Incorrect, incomplete and
erroneous information and the resulting damage we do not take responsibility.
1.5 Description of symbols
Safety instruction:
The safety instructions in the manual are marked with a warning triangle. They
indicate measures, which can lead to personal injury and safety risks.
Operation steps: small triangle “►”is used to indicate operation step.
Notes: Contains important information about operation or function.
1.6 Description of operation button

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No.
Button description
1
“-” Parameter adjust button
2
“+” Parameter adjust button
3
“ESC”, exit program setup
4
“SET” confirm button
5
“Holiday” button(SR530C8 have no such function)
6
“Heating”- manual heating button
7
“Clock” button
8
“On/off” button
9
LCD display screen
10
11
2．Installation
Controller can only be installed indoors, far away from dangerous place and away from
the electromagnetic field. Controller should be equipped with an additional plug, which
should have minimum 3mm distance between the pole of the plug or effective
compliance with the provisions of the installation. For example, switch or fuse, please
note that it should be separated between the wires, and use AC power.
2.1 Installing the controller
Note: the controller can only be installed in an area having an adequate level of
protection.
Fixing the hang-panel of controller
►Choose a suitable site
►Mark the position of hole
►Drill the fixing hole, insert the expansion screw
►Fix the hanging plate by using screw
►Press the control unit on the hanging plate
2.2 Preparing before wire connection
Please switch-off the power net before opening the controller cover, and note
the regulation of local electricity supply.
Open/ close the cover of terminal
►Loosen the screw ①②, move cover upwards and
take away the cover
►Close the cover: downwards close cover

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►fix cover by using screw ①②。
2.3 Power connection
Power can only be switched on when the house of controller is closed, an installer must
make sure that the IP protection class of the controller is not damaged during
installation.
Depending on the type of installation, the cables may enter the device through the rear
hole of the case ④or the lower side hole of the case ⑤
Cable come from the rear ④: remove the plastic flaps from the rear side of the case
using an appropriate tool.
Cable come from the below⑤: cut the left and right plastic flaps using an appropriate
tool (e.g. knife) and break them out of the case.
Notes: the flexible wire must be fastened on the case using the clamps provided

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2.4 Terminal connection
Before to open the terminal, please be sure to switch-off the power supplier
and pay attention to the local electricity supply rules.
Terminal layout
“ Reset” button：This button is on the terminal connection panel, when system program
is out of working, press “Reset” to recover the program of system to the factory
settings.
Power connection
Power connection terminal is: Input ports
Ground line terminal is GND
Sensor input ports
Input sensor ports T0, T1: for Pt1000 sensors, used for measuring the temperature of
collector and measuring the heat output.
Input sensor ports T2, T3, and T4: for NTC10K, B=3950 sensors, used for measuring
the temperature of tank and pipe.
Advice regarding the installation of temperature sensors:
Only original factory equipped Pt1000 temperature sensors are approved for use with
the collector, it is equipped with 1.5meter silicon cable and suitable for all weather
conditions, the temperature sensor and cable are temperature resistant up to 280oC,
not necessary to distinguish the positive and negative polarity of the sensor connection.
Only original factory equipped NTC10K,B=3950 temperature sensors are approved for
use with tank and pipe, it is equipped with 1.5meter PVC cable, and they are
temperature resistant up to 105oC, not necessary to distinguish the positive and
negative polarity of the sensor connection.
All sensor cables carry low voltage, and to avoid inductive effects, must not be laid

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close to 230 volt or 400-volt cables (minimum separation of 100mm)
If external inductive effects are existed, e.g. from heavy current cables, overhead train
cables, transformer substations, radio and television devices, amateur radio stations,
microwave devices etc, then the cables to the sensors must be adequately shielded.
Sensor cables may be extended to a maximum length of ca. 100 meter, when cable’s
length is up to 50m, and then 0.75mm2 cable should be used. When cable’s length is up
to 100m, and then 1.5mm2 cable should be used.
Output ports
Output R1：For solar circuit pump, semiconductor relay (SCR relay), also suitable for
RMP control, max. switching current 1A,
Output R2：for hot water circuit pump, electromagnetic relay, and max. switching
current 3.5A,
R2 ports are always open,
Output R3：for by-pass circuit pump or valve, electromagnetic relay, max. switching
current 3.5A, R3 ports are always open,
Output H1：for back-up electrical heater, electromagnetic relay, and max. switching
current 10A, H1 connection ports are always open.
3. Commissioning
Connect the sensors, pumps or switching valves to the controller before you
connect the power supply!
After switching on power to the controller, firstly it will ask for to set the time, password
and parameters of system.
3.1 Set time/week
►Press “Clock” button, time displays on screen, hour selection area “00” blinks on
display screen.
►Press “+”“-”button to set hour of clock
►Press “Clock” button again, minute
area“00”blinks
►Press “+”“-”button to set minute of clock.
►Press “Clock” again, week area “MO” blinks

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►Press “+”“-”button to set week.
►Press “ESC” button
to exit set program, or wait for 20 seconds to exit program automatically.
Code
Week day
MO
Monday
TU
Tuesday
WE
Wednesday
TH
Thursday
FR
Friday
SA
Saturday
SU
Sunday

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3.2 Menu structure
Menu of controller SR530C8Q Menu of controller SR530C8
Submenu:
Through submenu, customer can set the parameter as desired value, please check it
carefully.

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3.3 Menu description
Code
（Mainmenu）
Code
(Subme
nu)
Code
(Submenu)
Menu Description
Remark
DT O
Switch-on temperature
difference
DT F
Switch-off temperature
difference
THET
Timing heating
TEMP
Temperature
EM
Limited temperature of collector
(Emergency turnoff temperature
of collector)
CMX
Maximum temperature of
collector
(Collector cooling function)
CMN
Low temperature protection of
collector
CFR
Frost protection of collector
SMX
Maximum temperature of tank
REC
Tank re-cooling function
C-F
Celsius and Fahrenheit
temperature transferring
FUN
Auxiliary function
DVW
G
Anti legionnaires' function
CIRC
Temperature controlled hot
water circulation pump
nMIN
Speed controlling of circulation
pump
（RPM pump controlling）
Only available
on controller
SR530C8Q
DTS
Standard temperature difference
(for circulation pump speed
adjust)
RIS
Increase scale (circulation pump
speed adjusting parameter set)
OHQ
M
Thermal energy measuring
FMAX
Flow rate
MEDT
Type of heat transfer liquid
MED%
Concentration of heat transfer
liquid
INTV
Pump interval function
tSTP
Pump interval time
tRUN
Pump running time

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BYPA
By pass (high temperature)
HDN
Manual controlling
PASS
Password set
LOAD
Recovery to factory set
3.4 System description
Note:
T3 is alternative sensor, when no sensor (T3) is installed in the top part of tank,
controller will use the signal of sensor T2 automatically to control the auxiliary heating
or the circulation pump.
1 collector array –1 storage tank –1 pump and auxiliary heating
Description:
The solar circuit pump (R1) is switched on as soon as the switch-on temperature
difference (△Ton) between the collector array (T1) and the storage tank (T2) is
reached. If the temperature difference between the collector array (T1) and storage
tank (T2) drops below the switch-off temperature difference (△Toff), or the temperature
of storage tank (T3) reaches the preset maximum storage temperature, then the solar
circuit pump ( R1) is switched off.
Back-up heating by auxiliary boiler (detailed see paragraph 4.3):
Within the preset time section of back-up heating, if the temperature T3 is below the
switch-on temperature, then the circulation pump ( H1) of back-up heating is triggered,
when T3 is heated to the switch-off temperature, circulation pump H1 of back-up
heating is ceased.

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T0: Temperature sensor for thermal energy measuring ( optional sensor)
T1: Temperature sensor for collector array
T2: Temperature sensor in the bottom part of tank 1.
T3: Temperature sensor in the top part of tank (optional sensor)
T4: Temperature sensor on hot water circulation pipe (optional sensor)
R1: Solar circuit pump
R2: Hot water circuit pump (optional output)
R3: High temperature by-pass pump or valve (optional output)
H1: output for back-up electrical heater
4．Controller functions
4.1 Access main menu
Under standby status, doing like following access main menu
►Press “SET” button, “PWD 0000”displays on screen, the left first digital blinks, ask for
entering password, factory default set password is “ 0000”
►Press “+”“-” button to enter first digital of
password.
►Press “SET” button again, the second digital
blinks
►Press “+”“-” button button, to enter second digital of password
►Press “SET” button again, the third digital blinks
►Press “+”“-” button to enter the third digital of password
►Press “SET” button again, the fourth digital blinks
►Press “+”“-” button, to enter the fourth digital of password
►Press “SET” button again to access main menu
►Press “+”“-” button, can select the main menu
►Press “ESC” button to exit main menu
4.2 Access submenu
After selecting main menu, do like following access submenu
►Press “SET” button, to access submenu
►Press “+”“-” button to select submenu
►Press “SET” button again to access program，
can adjust parameter value now
►Press “+”“-”button, to adjust the value of
parameter
►Press “ESC” button, exit program of submenu
►Press “ESC” button again, to exit main menu.
For example: submenu

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4.3 Main menu DT O & DT F Temperature difference function
Description:
Solar circuit pump R1 is triggered by the temperature difference function, so long as the
temperature difference between collector and tank reaches the switch-on DT, solar
circuit pump is triggered.
For example: the switch-on DT is 8oC, switch-off DT is 4oC, if the temperature in the
bottom part of tank is 20oC, then just when collector temperature rises up to 28oC,
pump is triggered, and when collector temperature drops to 24oC, pump is ceased.
Note: the switch-on/off DT of 8 oC and 4 oC are standard system setting according to
many years’ experience, only in special application cases it needs to be changed, (e.g
far distance heat transferring), normally it is recommend to use default set. Switch-on
and switch-off DT are alternating set. To avoid mistake the minimum difference
between two temperature differences (ΔTon –ΔToff) is set as 2oC.
Setup the switch-on temperature difference:
Under standby status, access main menu DT O,
►Press “SET” button, to access settings program of DT O, “DT O 08℃” displays on
screen, “08℃” blinks, the switch-on temperature difference can be set.
►Press “+”“-” button, to adjust the value of switch-on DT, adjustable range
(OFF+2℃）～20℃，factory setting is 8℃
►Press “ESC” button to exit this setting,
parameter is saved automatically.
Setup the switch-off temperature difference:
Under standby status, access main menu DT F
►Press “SET” button, to access settings program of DT F, “DT F 04℃” displays on
screen, “04℃” blinks, the switch-off temperature difference can be set.
►Press “+”“-” button to adjust the value of switch-off DT, adjustable range 0℃～
（ON-2℃），factory set is 4℃.
►Press “ESC” to exit menu, or wait for 20
seconds to exit automatically, the setup
parameters are saved automatically.

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4.4 Main menu - THET timing heating
Description:
Electrical heater, gas boiler or oil boiler can be integrated into solar system used as
back-up of system, and they can be triggered automatically at preset time by preset
temperature. Within a preset time section, when the temperature (T3) of top part of
tank drops below the preset switching-on temperature of this function, back-up heating
starts to work, when T3 rises up to the preset turning off temperature, back-up heating
is stopped. Within 24 hours, three time sections can be set with this controller.
Factory set:
The first time section: back-up heating function starts at 4:00 and ends at 5:00 am.
Within this time section, switch-on temperature is 40℃, switch-off temperature is 45℃.
The second time section: from 10:00 to 10:00 am, it means there is no back-up heating
in this time.
The third time section: back-up heating function starts at 17:00 and ends at 22:00 pm.
Within this time section, the switch-on temperature is 50℃, switch-off temperature is
55℃.
The switch-on temperature adjustable range: 10℃~ (OFF-2 ℃)
The switch-off temperature adjustable range: (ON+2 ℃) ~ 80℃
If you want to shut off one timing heating, then you can set the turning on time and
turning off time same value (for example, the second time section no this function, then
you can set turning on/off time is 10:00 ~ 10:00)
When time is outside of the preset time section, back-up heating doesn’t work
automatically even when the tank temperature reaches the switch –on temperature of
heating.
Note:
When there is no sensor installed in the top part of tank (no T3 sensor), controller
will take the signal of T2 (sensor in bottom of tank) automatically to control this
function.
The time in this controlled is 24 hours, when you set time section, the switch-off
time of heating should be larger than switch-on time. For example: if you set the
switch-on time of heating is at 17:00, but switch-off time of heating is 6:00, then
this setting doesn’t take effect, that means within this time section, heating
function doesn’t work. The correct set is like flowing: it should be divided into two
time sections, one time section is from 17:00 to 23:59, the other time section is
from 00:00 to 06:00.
Setup steps:
Under standby status, access main menu tHET
►Press “SET” button, access THET program to set parameter, “tH 1o 04:00” displays

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on screen, the switch-on time and temperature for first time section of heating function
can be set
►Repress “SET” button, “04” of hour time
blinks on screen
►Press “+”“-” button to adjust hour of time
►Repress “SET” button again, “00” of minute time blinks on screen
►Press “+”“-” button to adjust minute of time
►Repress “SET” button, temperature “40℃” blinks on screen
►Press “+”“-” button, to set the switch-on temperature of heating
►Then, Press “ESC” to exit this set and to access the switch-off time and temperature
set
►Press “+” button, “tH 1F 05:00” displays on screen, the switch-off time and
temperature for first time section of heating function can be set
►Press “SET” button, “05” of hour time blinks on screen.
►Press “+”“-” button to adjust hour of time
►Repress “SET” button, “00” of minute time
blinks on screen
►Press “+”“-” button to set minute of time
►Repress “SET” button, temperature “45℃” blinks on screen
►Press “+”“-” button, to set switch-off temperature of heating
►Press “ESC” to exit this set program, parameters are saved automatically
-------------------------------------------------------------------------------------------------------------------
►Press“+” button, “tH 2o 10:00” displays on screen, the switch-on time and
temperature for the second time section of heating function can be set
►Press “SET” button, “10” of hour time blinks on screen
►Press “+”“-” button to adjust hour of time
►Repress “SET” button, “00” of minute time
blinks on screen
►Press “+”“-” button to adjust minute of time
►Repress “SET” button, temperature “50℃” blinks on screen
►Press “+”“-” button to adjust switch-on temperature of heating
►Then press “ESC” to exit this set and to access the switch-off time and temperature
set

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►Press “+” button, “tH 2F 10:00” displays on
screen, set the switch-off time and temperature
of second time section of heating function
►Press “SET” button, “10” of hour time blinks
on screen
►Press “+”“-”button to adjust hour of time
►Repress “SET” button, “00” of minute time blinks on screen
►Press “+”“-” button to adjust minute of time
►Repress “SET” button, temperature “55℃”blinks on screen
►Press “+”“-” button, to adjust switch-off temperature of heating
►Press “ESC” to exit this set program, parameter is saved automatically
------------------------------------------------------------------------------------------------------------------
►Press “+” button, “tH 3o 17:00” displays on screen, set the switch-on time and
temperature of the third time section of heating function
►Press “SET” button, “17” of hour time blinks
on screen
►Press “+”“-” button, to adjust hour of time
►Repress “SET” button, “00” of minute time
blinks on screen
►Press “+”“-” button, to adjust minute of time
►Repress “SET” button, temperature “50℃” blinks on screen
►Press “+”“-” button, to adjust switch-on temperature of heating
►Press “ESC” to exit this set program and to the switch-off time and temperature set
►Press “+” button, “tH 3F 22:00” displays on screen, the switch-off time and
temperature of the third time section of heating function can be set
►Press “SET” button, “22” of hour time blinks
on screen
►Press “+”“-” button, to adjust hour of time
►Repress “SET” button, “00” of minute time
blinks on screen
►Press “+”“-” button to adjust minute of time
►Repress “SET” button, temperature “55℃” blinks on screen
►Press “+”“-” button to adjust switch-off temperature of heating
►Press “ESC” to exit menu, or wait for 20 seconds, set parameters are saved
automatically
Note: when no gas or oil boiler is installed in system, electrical heater can be installed
as back-up device, when electrical heater is in operation status, signal blinks on

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screen.
If customer use electrical heater as back-up, please according to the power of electrical
heater to equip corresponding safety devices like contactor and breaker with this
controller, we strongly recommend equipping with SR801 device with this controller,
(SR801 detailed technical data see paragraph 10 spare parts)
4.5 TEMP Temperature main menu
For every system, the factory set parameters are in the best condition that is fully
integrated into the entire solar system. But these parameters can also be set
individually to cater the special requirements, please carefully observe the operation
data of system components after setting.
Note: parameters that can be set depend on the selected system, not all the
parameters can be adjusted in a solar system.
Following submenu can be access though TEMP main menu.
EM Emergency collector temperature
（Emergency switch-off temperature of collector）------------------------------------------4.5.1
CMX Maximum limited collector temperature (collector cooling function) ----------- 4.5.2
CMN low temperature protection of collector ----------------------------------------------4.5.3
CFR frost protection of collector -----------------------------------------------------------------4.5.4
SMX Maximum temperature of tank-------------------------------------------------------------4.5.5
REC Tank re-cooling function --------------------------------------------------------------------4.5.6
C-F Celsius and Fahrenheit temperature transferring--------------------------------------4.5.7
Function
Adjustable
range
Factory set
Function exit
temperature
EM Emergency collector
temperature
Emergency switch-off temperature
of collector）
120℃～200℃
130℃
127℃
CMX Maximum limited collector
temperature
(collector cooling function)
110℃～190℃
110℃
107℃
CMN low temperature protection of
collector
0℃～90℃
OFF
CFR frost protection of collector
-10℃～10℃
OFF
SMX Maximum temperature of tank
2℃～95℃
60℃
58℃
REC Tank re-cooling function
OFF
C-F Celsius and Fahrenheit
temperature transferring
oC ~ oF
oC

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4.5.1 EM Emergency collector temperature（Emergency switch-off temperature of
collector）
Function description:
When collector temperature rises up to the limited temperature (EM), this function is
activated, solar circulation pump is stopped in order to avoid the damage of system
other components caused by high temperature. The adjustable range of this EM
temperature is （120℃～200℃）, factory set is 130℃. When the temperature of
collector rises up to EM limited temperature, solar circuit pump is ceased, but when
collector temperature drops to 127℃, solar circuit pump restarts, and this function is
deactivated.
Setup steps:
to access main menu TEMP, then select submenu EM, “EM 130℃” displays on screen
►Press “SET” button, parameter “130℃” blinks.
►Press “+”“-” button, adjust EM temperature, adjustable range (120℃～200℃),
factory set is 130℃.
►Repress “SET” button, activate and deactivate this function, if deactivate the function,
“EM - - -” displays on screen.
►Press “ESC” button to exit menu or wait for 20 seconds to exit automatically, set
parameters are saved automatically.
When this two signals of EM blinks on the screen, it indicates this function
is in activated, and at this moment temperature of tanks reaches to its maximum limited
temperature
When only this signal of EM blinks on the screen, it indicates this function is also
activated, but temperature of tank doesn’t reach to its maximum limited temperature
4.5.2 CMX Maximum limited collector temperature (collector cooling function)
Function description:
The collector cooling function delays the vaporization of the heat transfer fluid. Shortly
before reaching the maximum temperature of the collector, the solar pump starts
working in order to cool down the heat transfer fluid using the heat losses occurring in
pipelines and storage cylinder.