STIEBEL ELTRON SOM 7 SI - Manual (Page 20)

SOM 7 SI
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4.1.19 Operating Mode
• HND1 / HND2
Operating mode
OFF
: relay off (blinking) +
AUTO : relay in automatic operation
ON : relay on (blinking) +
HND1/HND2:
Operating Mode
Adjustment range:
OFF, AUTO, ON
Factory setting: AUTO
The thermostat function is independent from the solar loop’s
differential switching temperatures and can be used either
to control a backup heating source such as a boiler, or to
send some of the tank’s excess thermal energy to a heating
loop or heat dump. Whis one it does is dependent upon the
settings AH O and AH F.
• If AH O < AH F
The thermostat function is used to add heat to the
tank using a back up heating source.
• If AH O > AH F
The thermostat function is used to remove the tank’s
excess thermal energy.
Symbol will be shown on the display if the second
relay output is activated.
4.1.18 Thermostat Function (Arr = 3)
Afterheating
AH O:
Thermostat
Switch-on Tem perature
Adjustment range 30 - 205°F
Factory setting 105°F
AH F:
Thermostat
Switch-off Tem pe rature
Adjustment range 30 - 205°F
Factory setting 115°F
t1 E, t2 E, t3 E:
Thermostat switch-on time
Adjustment range:
00:00 - 23:45
Factory setting: 00:00
t1 A, t2 A, t3 A:
Thermostat switch-off time
Adjustment range:
00:00 - 23:45
Factory setting: 00:00
In order to block the thermostat function for a certain time
span, there are 3 time frames t1, t2 and t3. If, for example,
the function should be activated only between 6:00 and
9:00, t1 E should be set to 6:00 and t1 A should be set for
9:00. If all of the thermostat time functions are set to 00:00,
the themostat function will be in continuous operation.
(factory setting).
4.1.20 Language
use of surplus energy
4.1.21 Units for Temperature Display
The menu unit can be adjusted:
• °FAH
• °CEL
For control and service work the operating mode of the
controller can be manually adjusted by selecting the ad-
justment value HAND, in which the following settings are
available.
The menu language can be adjusted in this channel.
• dE : German
• En : English
• It : Italian
• Fr : French
UNIT:
Temperature Display Units
A d j u s t m e n t r a n g e :
FAH, CEL
Factory setting: FAH
LANGUAGE
Language Setting
A d j u s t m e n t r a n g e :
d E , E n , I t , F r
Factory setting: En