Solar Controller SRK868V6 Installation and Operation Instructions
http://www.keracontrols.com
8
Inputs
1. Inputs
T1, T2
and
T3 (T4 optional)
for temperature sensors wiring
2. 3-cond. cable connected to the
Control Panel
Outputs
1. Outputs
P1
and
P2
: electromagnetic
relays
max. Switching current: 5A
2. Output
H1
: electromagnetic relay,
max switching current 16A
3. Output
R1
: electromagnetic relay,
max switching current 5A
Power Supply connection
1. Make sure that the
Power Line voltage is
as specified for the
controller model
System Reset:
This button is located above the screw terminals. Press to RESET the entire system to the factory settings.
NOTE: Installation of the temperature sensors:
Only the originally supplied Pt1000 temperature sensor should be used at the Solar collector. It has high temperature
silicon jacketed cable that is suitable for all weather conditions. This temperature sensor and the cable can withstand
temperatures up to +280
o
C (+536F). There in NO positive and negative polarity on the sensor connections.
Only the originally supplied NTC10K, B=3950 temperature sensors should be used at the tank and hot water pipe locations.
They have PVC jacketed cable, that is temperature resistant up to +105
o
C (+221F). There is NO positive or negative
polarity on the sensors connections.
All sensor cables carry low voltage, and must not be laid close to any high voltage wiring like 120, 230 or 400-volt wiring. A
minimum separation of at least 100 mm (4”) is required.
If external electromagnetic fields are present, e.g. from heavy current cables, overhead train cables, transformer
substations, radio and transmitters, radio stations, microwave devices etc, then the sensor cables may have to be
adequately shielded.
The Sensor cables may be extended to a maximum length of appx. 100 meters ( 300 feet ). The longer the cable, the
heavier (thicker) the cable gauge should be used.
3.
System Setup and Operation
Remember to connect the sensors and the pumps to the controller before connecting the Power supply !
After switching on the power to the controller, first set the controller “clock”.
Note, that the control panel LCD display has a back light that can turn itself off after appx. 30 minutes of not using
any pushbuttons. The backlight will be reactivated immediately upon pressing of any button on the panel.
3.1 ON / OFF button operation
►
Press and hold the “
ON/OFF
” button for 3 seconds. The entire controller will be deactivated but the tank temperature (T2)
and current time ( clock ) will remain displayed on the screen.
When the “
ON/OFF
” button is pressed again, the controller will be reactivated.
3.2 Clock preset
After power is switched on for the first time, the display will show the clock time as: “00:00”.
►
Press the “
Clock
” button. The clock hours will flash
►
Press “
▲
”“
▼
” buttons to set the current hour.
►
Press the “
Clock
” button again. The clock minutes will flash
►
Press “
▲
”“
▼
” buttons to set the current minutes.
After 6 seconds the controller will store the setting automatically.
