Hitachi YUTAKI S COMBI Series Installation And Operation Manual

64
PMEN0645 rev.0 - 04/2023
8
TESTRUN/AIRPURGE
COMMISSIONING
! CAUTION
It is recommended start the unit (rst power ON) with heater forced OFF and compressor forced
OFF (See “5.4.4.3 Addional hydraulic oponal elements (For DHW)”). In order to circulate water by
water pump and remove possible air into the heater (Check heater completely lled).
8.4 Test run / air purge
Test run is a working mode used when commissioning the installaon. Some sengs are made to
let the installer an easy job. Air purge funcon drives the pump in a way for evacuang air bubbles
in the installaon.
Example for PC-ARFH2E
This menu shows the following test to be launched:
• Unit Test Run
• Air Purge
• Screed Drying
• Pump down procedure
Aer “Test Run”, “Air Purge” or “Pump down procedure” opon is selected, the YUTAKI user
controller asks for the duraon of the test.

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