2 Specific installer safety instructions
Installation and operation manual
9
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P684060-1 – 2022.02
WARNING
If one or more rooms are connected to the unit using a
duct system, make sure:
▪ there are no operating ignition sources (example: open
flames, an operating gas appliance or an operating
electric heater) in case the floor area is less than the
minimum floor area A (m²).
▪ no auxiliary devices, which may be a potential ignition
source, are installed in the duct work (example: hot
surfaces with a temperature exceeding 700°C and
electric switching device);
▪ only auxiliary devices approved by the manufacturer
are used in the duct work;
▪ air inlet AND outlet are connected directly to the same
room by ducting. Do NOT use spaces such as a false
ceiling as a duct for the air inlet or outlet.
Opening the unit (see
27])
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
Mounting the outdoor unit (see
WARNING
Fixing method of the outdoor unit MUST be in accordance
with the instructions from this manual. See
28].
Connecting the refrigerant piping (see
31])
WARNING
Field piping method MUST be in accordance with the
instructions
from
this
manual.
See
28].
NOTICE
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this unit to guarantee its
lifetime. The drying material may dissolve and damage
the system.
CAUTION
Install the refrigerant piping or components in a position
where they are unlikely to be exposed to any substance
which may corrode components containing refrigerant,
unless the components are constructed of materials that
are inherently resistant to corrosion or are suitably
protected against corrosion.
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas might be produced if refrigerant gas comes
into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
WARNING
During tests, NEVER pressurise the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
CAUTION
Do NOT vent gases into the atmosphere.
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
WARNING
NEVER remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Charging refrigerant (see
WARNING
▪ The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the
formation of a harmful gas.
▪ Turn OFF any combustible heating devices, ventilate
the room, and contact the dealer where you purchased
the unit.
▪ Do NOT use the unit until a service person confirms
that the part from which the refrigerant leaked has been
repaired.
WARNING
Charging of refrigerant MUST be in accordance with the
instructions from this manual. See
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
