92
MUL
TI V Hydro Kit Medium T
emperature (K2) Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Functions
Temperature Control Parameter Settings
Water Supply Off Temperature During Cooling
Use to determine leaving water temperature when the product is turned off. This function is used for preventing condensation from generating
and pooling on the floor when the unit is in cooling mode.
• Stop Temperature: Cut-off temperature. Stop Temperature is valid when an Fan Coil Unit is installed.
• Fan Coil Unit: Use to determine if an Fan Coil Unit is installed or not.
Example: If Stop Temperature is set as "10" and Fan Coil Unit is "Use", but actually Fan Coil Unit is NOT installed in the water loop, the unit
will stop operation in cooling mode when the leaving water temperature is below 50°F (10°C).
Example : If Stop Temperature is set as "10" and Fan Coil Unit is "Not Use", but actually Fan Coil Unit is installed in the water loop, the Stop
Temperature setting is not used and the unit does NOT stop operation in cooling mode when the leaving water temperature is below 50°F
(10°C).
Fan Coil Unit Installation
•
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PRE-COMMISSIONING
Tank Settings 2
Tank Settings 2 include the parameters below:
• Minimum Temperature: Temperature difference from Maxi-
mum Outdoor Temperature.
• Maximum Outdoor Temperature: Maximum temperature
generated by the compressor cycle.
Example: If Minimum Temperature is set as "5" and Maxi-
mum Outdoor Temperature is set as "48", then Session A
(see figure at right) will start when the water tank tempera-
ture is below 113°F (45°C). If temperature is above 118°F
(48°C), then Session B will start.
• Hysteresis: Temperature difference from target domestic
hot water temperature. This value is required for frequent
On and Off water tank heater operation.
• Heating Priority: Determining heating demand priority be-
tween domestic hot water tank heating and floor heating.
• Domestic hot water heating does not operate when it is disabled.
• Hydro Kit only performs the heating priority function.
Water Heater Off
Temperature
Time
Session B
Session C
Target DHW
Temperature (Set by User)
Starting Temperature
of DHW 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)
Minimum
Temperature
Maximum Outdoor
Temperature
Hysteresis
Session D
Session D
Session A
Session A
Figure 105: Tank Setting Parameters.
Example: If the target temperature is set as "70" and Hysteresis is set as "3", then the water tank heater will be turned OFF when the water
temperature is above 163°F (73°C). The water tank heater will be turned ON when the water temperature is below 158°F (70°C).
Example: If Heating priority is set as "DHW", that means heating priority is on domestic hot water heating, domestic hot water is heated by
the compressor cycle and water heater. In this case, the floor heating can not operate during domestic hot water heating. Conversely, if the
Heating priority is set as "Floor heating", that means the floor heating is the priority, domestic hot water tank is ONLY heated by water heater.
In this case, the floor heating does not stop operation while the domestic hot water is heated.
