7 | Operation
Installer and user reference guide
24
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
7 Operation
In this chapter
7.1 Before operation .................................................................................................................................................................... 24
7.2 Operation range...................................................................................................................................................................... 25
7.3 Operating the system ............................................................................................................................................................. 25
7.3.1 About operating the system .................................................................................................................................. 25
7.3.2 About cooling, heating, fan only, and automatic operation ................................................................................. 25
7.3.3 About the heating operation ................................................................................................................................. 26
7.3.4 To operate the system (WITHOUT cool/heat changeover remote control switch) ............................................. 26
7.3.5 To operate the system (WITH cool/heat changeover remote control switch)..................................................... 27
7.4 Using the dry program............................................................................................................................................................ 27
7.4.1 About the dry program .......................................................................................................................................... 27
7.4.2 To use the dry program (WITHOUT cool/heat changeover remote control switch)............................................ 28
7.4.3 To use the dry program (WITH cool/heat changeover remote control switch) ................................................... 28
7.5 Adjusting the air flow direction.............................................................................................................................................. 29
7.5.1 About the air flow flap ........................................................................................................................................... 29
7.6 Setting the master user interface .......................................................................................................................................... 30
7.6.1 About setting the master user interface ............................................................................................................... 30
7.6.2 To designate the master user interface (VRV DX and Hydrobox) ......................................................................... 30
7.7 About control systems............................................................................................................................................................ 30
7.1 Before operation
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been carried out correctly by
an installer.
NOTICE
NEVER inspect or service the unit by yourself. Ask a qualified service person to
perform this work.
CAUTION
It is unhealthy to expose your body to the air flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner
is used together with the system.
CAUTION
Do NOT operate the system when using a room fumigation-type insecticide.
Chemicals could collect in the unit, and endanger the health of people who are
hypersensitive to chemicals.
NOTICE
Be sure to turn ON the power 6 hours before operation in order to have power
running to the crankcase heater and to protect the compressor.
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