Hitachi Cooling & Heating / SERIES OVERVIEW

Hitachi G Series

Air-Cooled Scroll Chiller / Heat Pump

Brand: Hitachi Cooling & Heating
Series: G
Equipment category: Heat Pumps

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Hitachi G air-cooled scroll chiller / heat pump series reference image — Series reference image. Individual model configurations may differ.

Product overview

G-Series modular air-cooled equipment uses R410A and hermetic scroll compressors. Standard A, all-year AN and low-temperature AL configurations have different operating envelopes. The tables show individual module ratings; combined plant duty requires a separate selection.

Key technical specifications

G: standard / all-year heat-pump modules

Standard A and all-year AN variants share the printed nominal ratings; their operating envelopes differ. These are single-module ratings, not capacities for a multi-module assembly.

G: standard / all-year heat-pump modules. Standard A and all-year AN variants share the printed nominal ratings; their operating envelopes differ. These are single-module ratings, not capacities for a multi-module assembly.
Model reference	Cooling capacity(kW)	Cooling input power(kW)	Heating capacity(kW)	Heating input power(kW)	Main power supply	Refrigerant	Compressor type	Length(mm)	Width(mm)	Height(mm)	Net weight(kg)	CSPF (brochure)(dimensionless)
RHUA021A-G	65	21.1	67	21.3	380 V / 3 phase / 50 Hz	R410A	Hermetic scroll	1900	970	1960	540	3.55
RHUA041A-G	130	41	133	41.2	380 V / 3 phase / 50 Hz	R410A	Hermetic scroll	2220	1110	2160	800	3.6
RHUA021AN-G	65	21.1	67	21.3	380 V / 3 phase / 50 Hz	R410A	Hermetic scroll	1900	970	1960	540	3.55
RHUA041AN-G	130	41	133	41.2	380 V / 3 phase / 50 Hz	R410A	Hermetic scroll	2220	1110	2160	800	3.6

Cooling: leaving water 7 °C, water flow 0.172 m³/(h·kW), outdoor dry bulb 35 °C. Heating: leaving water 45 °C, same flow coefficient, outdoor dry bulb / wet bulb 7/6 °C.
Standard cooling ambient 15–45 °C; AN all-year cooling ambient −15–45 °C. Both standard/all-year heating ambient −15–25 °C. Cooling/heating leaving-water ranges are 5–15 / 35–50 °C.
CSPF is the brochure seasonal index, not instantaneous COP or a guaranteed project energy-saving rate.
Brochure reference ratings are not a current stock or delivery guarantee. Confirm the complete configuration, nameplate, destination-market requirements and current selection before procurement.

G: low-temperature AL heat-pump modules

Separate AL configuration. Standard heating, nominal low-ambient heating and lower-temperature heating have distinct test conditions; do not compare them without those conditions.

G: low-temperature AL heat-pump modules. Separate AL configuration. Standard heating, nominal low-ambient heating and lower-temperature heating have distinct test conditions; do not compare them without those conditions.
Model reference	Cooling capacity(kW)	Cooling input power(kW)	Standard heating (7 °C air)(kW)	Standard heating input(kW)	Heating (−12 °C air)(kW)	Heating (−20 °C air)(kW)	APF (brochure)(dimensionless)	Main power supply	Refrigerant	Compressor type	Length(mm)	Width(mm)	Height(mm)	Net weight(kg)
RHUA026AL-G	74	23.1	82	23.7	52	43	3.28	380 V / 3 phase / 50 Hz	R410A	Hermetic scroll	1870	1030	1960	600
RHUA051AL-G	145	47.5	155	46.5	102	81	3.27	380 V / 3 phase / 50 Hz	R410A	Hermetic scroll	2210	1150	2250	940

Cooling: leaving water 7 °C; outdoor dry bulb 35 °C; water flow 0.172 m³/(h·kW). Standard heating: leaving water 45 °C, outdoor dry bulb / wet bulb 7/6 °C, same flow coefficient.
Nominal heating: leaving water 41 °C, outdoor dry bulb −12 °C / wet bulb −13.5 °C. Low-temperature heating: leaving water 41 °C, outdoor dry bulb −20 °C. These values are not the standard 7 °C heating rating.
AL envelope: cooling ambient 10–48 °C and leaving water 5–20 °C; heating ambient −30–30 °C and leaving water 35–60 °C. Confirm duty at the actual design point.
APF is the brochure seasonal index, not interchangeable with the standard-model CSPF or a project energy-saving percentage.
Brochure reference ratings are not a current stock or delivery guarantee. Confirm the complete configuration, nameplate, destination-market requirements and current selection before procurement.

Key configuration options

Standard and AN all-year configurations share nominal ratings but have different cooling ambient ranges.
Low-temperature AL models have their own capacity table, water-side heat exchanger and test conditions.
No screw, centrifugal or inverter-compressor configuration is inferred from the G-series name.

Applications

Modular hydronic cooling / heating
Project-specific outdoor chiller / heat-pump equipment selection

Information for equipment selection

Complete model / configuration and equipment schedule
Required duty and design water / ambient conditions
Power supply, installation space and project location
Destination-market requirements and current availability confirmation

Application suitability requires a review of the project requirements and selected model.

Technical documents

No model-specific technical documents are available for download on this page. Request Technical Information

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Product reference: Hitachi G Series

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