HXHD125A7V1BVRVIII system indoor unit4PW62585-1 – 11.2010Operation manual2User:Person who is owner of the product and/or operates the product.Service company:Qualified company which can perform or coordinate the requiredservice to the unit.Applicable legislation:All international, European, national and local directives, laws,regulations and/or codes which are relevant and applicable for acertain product or domain.Accessories:Equipment which is delivered with the unit and which needs to beinstalled according to instructions in the documentation.Optional equipment:Equipment which can optionally be combined to the products as perthe subject of this manual.Field supply:Equipment which needs to be installed according to instructions inthis manual, but which are not supplied by Daikin.2. GENERAL SAFETY PRECAUTIONSThe precautions listed here are divided into the following four types.They all cover very important topics, so be sure to follow themcarefully.3. INTRODUCTION3.1. General informationThe unit is the indoor part of the air to water REYAQ heat pump. Theunit is designed for floor standing indoor installation and used forheating applications. The unit can be combined with space heatingradiators (field supply) and with an EKHTS200/260AC domestic hotwater tank (option).A remote controller with room thermostat functionality is standardsupplied with this unit to control your installation.Refer to the installation manual for the list of options.3.2. Scope of this manualThis manual describes how to start up and switch off the unit, setparameters and configure the schedule timer by means of thecontroller, maintain the unit and solve operational problems.DANGER: ELECTRICAL SHOCKSwitch off all power supply before removing the switchboxservice panel or before making any connections ortouching electrical parts.Do not touch any switch with wet fingers. Touching a switchwith wet fingers can cause electrical shock. Beforetouching electrical parts, turn off all applicable powersupply.To avoid electric shock, be sure to disconnect the powersupply 1 minute or more before servicing the electricalparts. Even after 1 minute, always measure the voltage atthe terminals of main circuit capacitors or electrical partsand, before touching, be sure that those voltages are50 V DC or less.When service panels are removed, live parts can easily betouched by accident. Never leave the unit unattendedduring installation or servicing when the service panel isremoved.DANGER: DO NOT TOUCH PIPING AND INTERNALPARTSDo not touch the refrigerant piping, water piping or internalparts during and immediately after operation. The pipingand internal parts may be hot or cold depending on theworking condition of the unit.Your hand may suffer burns or frostbite if you touch thepiping or internal parts. To avoid injury, give the piping andinternal parts time to return to normal temperature or, ifyou must touch them, be sure to wear protective gloves.NOTICEAn HXHD125 indoor unit can only be connected to anREYAQ outdoor unit.INFORMATIONThe installation of the indoor unit(s) is described in theindoor unit installation manual.