EUROSTER 813 – USER MANUAL 4
Overheating in the solar collector
In operating mode-1/2/3
Output A will be turned on when S1 temperature ≥ S1 Hi temp. limits. setpoint and S2
temperature ≤ S2 (Hi temp. limits. Setpoint -2°C)
Output A will be turned off when S1 temperature ≤ (S1 Hi temp. limits. setpoint -5°C)
and S2 ≤ S2 Hi temp. limits. setpoint
In operating mode-4
Output A&B will be turned on when S1 temperature ≥ S1 Hi temp. limits setpoint and S2
temperature ≤ (S2 Hi temp. Limits Setpoint -2°C)
Output A&B will be turned off when S1 temperature ≤ (S1 Hi temp. limits. setpoint -5°C)
and S2 temperature ≤ (S2 Hi temp. Limits. setpoint-2°C)
Overheating in the storage tank
In operating mode-1/2/3
Output A will be turned on when S2 temperature ≥ S2 Hi temp. limits setpoint and S1
temperature ≤ (S1 Hi temp. limits. setpoint -5°C)
Output A will be turned off when S2 temperature ≤ (S2 Hi temp. limits. setpoint -2°C)
and S1 temperature ≤ S1 Hi temp. limits. setpoint
In operating mode-4
Output A&B will be turned on when S2 temperature ≥ S2 Hi temp. limits. setpoint and S1
temperature ≤ (S1 Hi temp. limits. setpoint -5°C)
Output A&B will be turned off when S2 temperature ≤ (S2 Hi temp. limits. setpoint -2°C)
and S1 temperature ≤ S1 Hi temp. limits. setpoint
8. Anti-frost protection : Active when the unit is ON (in operation)
Output A will be turned on for 1 minute in every hour when S1 temperature = 5°C.
Output A will be permanent turned on when S1 temperature = 2°C, until S1 > 5°C.
Enable(ON) or disable(OFF) this function is selectable. Default setting : OFF
(Set/adjust all the setpoints in the S1,S2 and S3)
9. Set/adjust the "Hi. Temp. Limits." (the overheating protection temperature setpoint)
S1 : Setting range from 60°C to 190°C. Default setting 120°C
S2 : Setting range from 0°C to 100°C. Default setting 95°C
10. Set/adjust the "Lo Temp. Limits" (the lowest temperature protection setpoint):
Only in the S1
Output A will be shut off when temperature at S1 is lower than "Lo Temp. Limits" Setting
range from 10°C to 40°C. Default setting 15°C
11. ∆T S1-S2 (Turn ON or OFF the solar collector circulation pump to the differential setpoints)
ON :The minimum required temperature difference between S1 temperature at Solar panel
and S2 temperature at the lower of storage tank which is for turning ON Output A.
Setting range:3~20°C, default setting 10°C
OFF:The minimum required temperature difference between S1 temperature at Solar panel
and S2 temperature at the lower of storage tank which is for turning OFF Output A to avoid
reverse circulation.
Setting range:1~18°C, default setting 3 °C
12. ∆T S2-S3 (Turn ON or OFF the Circulation pump to the differential setpoints) Effects
in operating mode-4 only
ON:The minimum required temperature difference between S2 temperature at the lower
of 1st storage tank and S3 temperature at the lower of 2nd storage tank which is for
turning ON Output B. Setting range: 3~20°C, default setting 10°C
OFF:The minimum required temperature difference between S2 temperature at the lower
of 1st storage tank and S3 temperature at the lower of 2nd storage tank which is turning
OFF Output B. Setting range:1~18°C, default setting 3°C
13. Set/adjust the temperature setpoints at S2&S3 and their Switching differential
(Hysteresis)
These setpoints will provide this unit with the thermostatic operation to automatically
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