Hitachi YUTAKI S COMBI Series Installation And Operation Manual

61
PMEN0645 rev.0 - 04/2023
8
BEFOREOPERATION
COMMISSIONING
8.1 Before operaon
! CAUTION
• Supply electrical power to the system for approximately 12 hours before start-up aer a long
shut-o. Do not start the system immediately aer power supply, it may cause compressor
failure because the compressor is not well-heated.
• When the system is started aer a shut-o longer than approximately 3 months, it is
recommended that the system be checked by your service contractor.
• Turn OFF the main switch when the system is to be stopped for a long period of me: as the oil
heater is always energized even when the compressor is not working, there will be electricity
consumpon unless the main switch is turned OFF.
8.2 Preliminary check
When installaon is complete, perform commissioning according to the following procedure, and
hand over the system to the customer. Perform the commissioning of the units methodically, and
check that the electrical wiring and the piping are correctly connected.
Indoor and outdoor units must be congured by the installer to get the perfect seng and the unit
working.
 NOTE
For the commissioning of the outdoor unit please refer to the outdoor unit installaon and
operaon manual.
8.2.1 Checking the unit
• Check external appearance of the unit to look for any damage due to transportaon or
installaon.
• Check that all the covers are totally closed.
• Check that the recommended service space is respected (see Service space chapter in the
Indoor unit Instrucon manual and the outdoor unit Installaon and operaon manual).
• Check that the unit has been correctly installed onto the wall.
8.2.2 Electrical checking
! CAUTION
Do not operate the system unl all the check points have been cleared:
• Check to ensure that the electrical resistance is more than 1 MΩ, by measuring the resistance
between ground and electrical parts terminal. If not, do not operate the system unl the
electrical leakage is found and repaired. Do not impress the voltage on the terminals for
transmission and sensors .

Hitachi YUTAKI S COMBI Series Specifications

General

Type	Air-to-Water Heat Pump
Energy Efficiency Class (Cooling)	A++
Refrigerant	R32
Operating Temperature Range (Heating)	-20°C to 35°C
Energy Efficiency Class (Heating)	A+++
Integrated DHW Tank	190 liters
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Weight (Indoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Operating Temperature Range (Cooling)	+10°C to +46°C