System Set-Up
76
Air-to-Water Heat Pump
• Function Code 2A
: Miscellaneous setting
- Value #1 of Function Code 2A : determine electric heater and sanitary tank heater on and off.
- Value #2 of Function Code 2A : not used.
- Example : If Value #1 is set as ʻ0ʼ, then electric heater and sanitary tank heater are on and off
according to control logic. If Value #1 is set as ʻ1ʼ, then electric heater is never turned on and only
water heater is on and off according to control logic.
• Function Code 2B
: Sanitary water heating timers
Determine following time duration : operation time of sanitary tank heating, stop time of sanitary
tank heating, and delay time of sanitary tank heater operating.
- Value #1 of Function Code 2B : This time duration defines how long time sanitary tank heating can
be continued.
- Value #2 of Function Code 2B : This time duration defines how long time sanitary tank heating can
be stopped. It is also regarded as time gap between sanitary tank heating cycle.
- Value #3 of Function Code 2B : This time duration defines how long time sanitary tank heater will
not be turned on in sanitary water heating operation.
- Example of timing chart :
Sanitary tank
heating is enabled
Sanitary tank heater
is enabled
Sanitary tank
heating is required
Sanitary tank
heating operation
Sanitary tank
heater operation
Time
2B.03
2B.03
2B.01
2B.01
2B.02
2B.02
2B.02
