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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Features
• Function Code 28 and 29
: Setting control parameter for Sanity water heating operation
Descriptions for each parameters are as following.
- Value #1 of Function Code 28 : temperature gap from Value #2 of Function Code 28.
- Value #2 of Function Code 28 : maximum temperature generated by AWHP compressor cycle.
- Example : If Value #1 is set as ‘5’ and Value #2 is set as ’48’, then Session A (see the graph) will be started when
the water tank temperature is below 45°…. If temperature is above 48 °…, then Session B will be started.
- Value #1 of Function Code 29 : temperature gap from target sanitary water temperature. This value is required to
frequent On and Off of water tank heater.
- Value #2 of Function Code 29 : Determining heating demand priority between sanitary water tank heating and
under floor heating.
- Example : If user’s target temperature is set as ’70’ and Value #1 is set as ‘3’, then the water tank heater will be
turned off when the water temperature is above 73 °C. The water tank heater will be turned on when the water
temperature is below 70 °C.
- Example : If Value #2 is set as ‘0’, that means heating priority is on sanitary water heating, sanitary water is heat-
ed by AWHP compressor cycle and water heater. In this case the under floor can not be heated while sanitary
water heating. On the other hand, if the Value #2 is set as ‘1’, that means heating priority is on under floor heat-
ing, sanitary tank is ONLY heated by water heater. In this case the under floor heating is not stopped while sani-
tary water is heated.
Water heater off
temperature
Time
Session A
Session B
Session C
Session D
Target sanitary water
temperature (set by user)
Starting temperature
of sanitary water heating
Session A : Heating by AWHP compressor cycle and water heater
Session B : Heating by water heater
Session C : No heating (Water heater is Off)
Session D : Heating by water heater
Water temperature
(Inside sanitary water tank)
Value #1 of
Function Code 28
Value #2 of
Function Code 28
Value #1 of
Function Code 29
• Function Code 2A
: Miscellaneous setting
- Value #1 of Function Code 2A : determine electric heater and water heater on and off.
- Value #2 of Function Code 2A : not used.
- Example : If Value #1 is set as ‘0’, then electric heater and water heater are on and off according to control logic.
If Value #1 is set as ‘1’, then electric heater is never turned on and only water heater is on and off according to
control logic.
