5
PMEN0643 rev.0 - 04/2023
1
IMPORTANTNOTICE
GENERAL INFORMATION
1.4 Important noce
• Verify, in accordance with the manuals which appear in the outdoor and indoor units, that all
the informaon required for the correct installaon of the system is included. If this is not the
case, contact your distributor.
• Hitachi pursues a policy of connuous improvement in product design and performance. The
right is therefore reserved to vary specicaons without noce.
• Hitachi cannot ancipate every possible circumstance that might involve a potenal hazard.
• This air to water heat pump has been designed for standard water heang for human beings
only. Do not use this for other purposes such as for drying clothes, heang foods or for any
other heang process (except swimming pool).
• No part of this manual may be reproduced without wrien permission.
• If you have any quesons, contact your service contractor of Hitachi.
• Check and make sure that the explanaons of each part of this manual correspond to your air to
water heat pump model.
• Refer to the models codicaon to conrm the main characteriscs of your system.
• Signal words (NOTE, DANGER and CAUTION) are used to idenfy levels of hazard seriousness.
Denions for idenfying hazard levels are provided in inial pages of this document.
• The operaon modes of these units are controlled by the unit controller.
• This manual should be considered as a permanent part of the air to water heat pump. It gives
a common descripon of and informaon for this air to water heat pump which you operate as
well as for other models.
• Keep the water temperature of the system above the freezing temperature.