8425 Almeria Avenue
•
Fontana CA 92335
Ph (909) 434-3100
•
Fax (909) 434-3101
Protecting Our Environment
– Since 1978
www.sunearthinc.com
SunEarth-Steca TR0301U Technician Menu – v5
The Operating Instruction Manual does not cover this technician menu.
WARNING! Adjusting settings incorrectly can result in poor system performance and may result in damage to solar
thermal system components. These settings should only be adjusted by a qualified technician with thorough knowledge of
the workings and components of solar thermal systems.
To activate or access the
technician
menu:
•
Hold all three buttons down for ~5 seconds until the screen changes.
•
The screen should show “on” and flashing between T1 and T2.
If it doesn’t work, try again, all three buttons at the same
time for 5 seconds
In the technician menu you can adjust the following:
Menu
Item
Default Description
on
16F
Differential “on”- turns the pump on when the temperature T1-T2= 16F. Display flashes
between T1 and T2.
(See the Operating Instructions 7.1 Automatic storage tank charging)
oFF+4F <=on<=100F
off
8F
Differential “off”-turns the pump off when the temperature T1-T2=8F. Display flashes
between T1 and T2.
(See the Operating Instructions 7.1 Automatic storage tank charging)
0< oFF<on-4F
HYS
6F
Hysteresis for MAX tank temperature T2- turns the pump off when T2=140F (0 ~ 95°C), turns
the pump on when T2=134F (0 ~ MAX T2/2 ). Display flashes MAX T2.
(See the Operating
Instructions 7.2 Automatic charging shutdown) 32F~203F
on
261°F
Over temperature function “on”- turns the pump back on when T1=261°F Display flashes heat
waves on the collector and T2.
(See the Operating Instructions 7.3 Automatic pump blockage)
176°F<=on<=oFF-4F
oFF
266°F
Over temperature function “off”- turns the pump off when T1=266°F. Display flashes heat
waves on the collector and T2.
(See the Operating Instructions 7.3 Automatic pump blockage)
on+4F<=oFF<=392°F
oFF
95°F
Holiday/vacation setting- turns the pump on periodically recirculating fluid to the collectors
cooling the tank until T2=95°F. Display flashes umbrella and T2.
(See the Operating Instructions 7.5 Holiday Function). 68°F<=oFF<=MAX T2-20F
on
32°F
Minimum temperature of collector- turns the pump on
32°F<= on <= over temperature on -20F
off
off
Off: pump
stops
if Freeze recirculation functionis active and there is an error on T1
On: pump
starts
if Freeze recirculation function is active and there is an error on T1
off
extra
off
Stagnation Reduction funciton delays fluid standstill(stagnation) by repeatedly stopping the
pump as the T2 approaches its MAX tank setting.
ON: The pump starts cycling at 20
°
F below the MAX tank main menu setting
40
extra
40
After the initial pump stoppage, pump restarts when collector temperature is 40
°
F less than the
OVER TEMPERATURE FUNCTION(default 266
°
F). Pump now stops and starts within a
20
°
F range until MAX tank main menu setting is reached.
T1-collector sensor, T2-tank sensor, T3-optional informational sensor-does not effect operation of the controller
Within the technician menu,
the graphical display on the screen will indicate what you are adjusting.
•
Use the arrow keys to scroll up and down through the menu to get to the function that you want to change. The graphical
display on the screen will indicate what you are adjusting
(see table above)
.
•
Hold the “SET” button down for ~3 seconds to access adjustment of the function value, just like the main menu described in
the manual
(see 8.2 Setting the controller)
. The screen will change and will flash between the number set in the controller
and the function being changed.
•
Use the arrow keys to adjust the number.
•
Use the “SET” button to set the number into the software. The controller has EPROM memory so settings will be saved even
when the controller is powered off.
