Installation Guide

Page 19 mrcool.com
Indoor Unit Installation
5.1 Tools needed
You will require the following tools to carry out this
installation work correctly:
•1x crescent wrench, 19 mm
•1x crescent wrench, 22 mm/24mm
•1x crescent wrench, 24 mm/27mm
•1x Allen key, 5 mm
•1x Philips screwdriver
•1x leak detection spray or alternatively soap suds
(water/detergent mix)
5.2 Important information
•Follow the detailed instructions for connecting the
refrigerant pipes to the indoor unit and outdoor unit.
We can only provide a warranty if the lines are installed
correctly as described in the instructions.
•Do not remove the sealing caps and stoppers until
immediately before you install the lines.
•To prevent leaks, ensure that the quick-release screw
connections are absolutely free of dirt. Moisture or
foreign bodies will adversely affect the function of the
quick-release connectors, leading to a risk of refrigerant
loss (not covered by the warranty).
•Only install refrigerant lines outdoors in dry weather.
•The refrigerant lines must not be plasterred over after
they are installed.
•Please make sure that refrigerant is never allowed to
enter the environment. Improper handling of
refrigerant may be harmful to health. Always wear
work gloves and goggles when handling refrigerant.
•Do not smoke during the installation work. The
equipment must never be o+perated without the
refrigerant lines connected, otherwise the equipment
will be damaged immediately.
•The screw connections may only be tightened using the
appropriate open ended (i.e. crescent or adjustable) wrench.
Step 5: Connect Refrigerant Piping to Indoor Unit Refrigerant Pipe Connectors (both ends):
NOTE: To distinguish the connectors to be
connected to the indoor unit and outdoor unit,
the connectors of the refrigerant pipe has been
labelled “A”, “B”,“C”and “D”. Ensure the marks
on the connectors are the same, to the indoor’s
and outdoor’s respectively during connection.
If the screw connections are tightened with too little
torque, they will leak. If they are tightened with too
much torque, the screw connections may suffer
damage. Please refer to the torque requirements
section for more information. If you are not confident
about connecting the refrigerant line connectors
yourself, it is imperative that you contact the
MRCOOL® customer service team or a professional.
IMPORTANT:
The EQ valves are only designed for one-time
installation. Their seal can not be guaranteed if they are
installed on more than one occasion. This will also void
the warranty.
5.3 Connecting the refrigerant pipes to the
indoor unit
1.
Do not remove the plastic seals from the indoor
equipment and the appropriate refrigerant pipe
until immediately before you connect them.
2. Align the refrigerant pipes correctly, make sure
the dimensions of the connecting refrigerant pipe
are the same. Place the screw connector on the
refrigerant pipes just on to the thread on the
indoor equipment and tighten the first few
threads by hand.
IMPORTANT:
Before you continue, it is essential that you read
the following instructions carefully.