Hitachi YUTAKI M R32 Series - Commissioning Procedure; Test and Check

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PMML0600 rev.0 - 06/2022
7
COMMISSIONING PROCEDURE
COMMISSIONING
7.2.5 Test and check
Finally, test and check the following items:
• Water leakage
• Refrigerant leakage
• Electrical connection
 NOTE
Please refer to the chapters of “5.1.5 Water lling” and “7.3 Commissioning procedure” in this doc-
ument and refer the Outdoor unit Installation and Operation manual for the specic details about
refrigerant charge tasks.
! DANGER
Do not connect the power supply to the indoor unit prior to lling the space heating circuit
(and DHW circuit if it were the case) with water and checking water pressure and the total
absence of any water leakage.
7.3 Commissioning procedure
This procedure is valid regardless of what options are on the module.
• When installation is complete and all necessary settings (DIP-switches in PCBs and user con-
troller conguration) have been carried out, close the electrical box and place the cabinet as
shown in the manual.
• Make the start-up wizard conguration in the user controller.
• Make a test run as shown in item “7.4 Test run / air purge”.
• Aer test run is completed, start the entire unit or the selected circuit by pressing the OK but-
ton.
◆ Initial start-up at low outdoor ambient temperatures
During commissioning and when water temperature is very low, it is important for the water to
be heated gradually. Additional optional function can be used for starting at low water tempera-
ture conditions: Screed drying function:
✓ The screed function is used exclusively for the process of drying a newly applied screed to
the oor heating system. The process is based on EN-1264 par 4.
✓ When user activates screed function, the water set point follows a predetermined schedule:
1 Water set point is kept constant at 25ºC for 3 days
2 Water set-point is set to the maximum Heating supply temperature (but always limited to ≤
55ºC) for 4 days.