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Page 27
mrcool.com
Outdoor Unit Installation
Refrigerant Piping Connection
6
NOTE
To distinguish the connectors to be connected to the indoor unit and outdoor unit, the
connectors of the refrigerant pipe have been labelled “A”,“B”,“C”and “D”. Ensure the marks on
the connector are the same to the indoor’s and outdoor’s respectively during connection.
Connecting the refrigerant pipe to outdoor unit
CAUTION
For your safety, always wear goggles and work gloves when connecting the pipes.
6
Refrigerant Piping Connection
1. First remove the
water tray on the
outdoor unit as
shown.
2. Do not remove the plastic seals from the
outdoor unit and the appropriate
refrigerant pipes until immediately before
you connect them.
NOTE: The refrigerant pipes must be connected to the
valves on the outdoor unit with as little stress as
possible.
IMPORTANT: Before you continue, it is essential that
you read the following instructions carefully.
3. Align the refrigerant pipes correctly so that they line
up with the valves and are not stressed. Place the
screw connector on the refrigerant line just on to the
thread on the outdoor unit and tighten the first few
threads by hand.
4. Now tighten the bottom screw connector first and
then the top screw connector using the open ended
wrench (i.e. crescent or adjustable). Using the wrench,
hold the points marked “1” and turn the nuts only at
the points marked “2” (Select the appropriate wrench
according to the dimensions of the connector).
Ensure that the screw connectors do not skew as you
tighten them and work quickly. See below for the
proper torque requirements.
After completing steps 1- 4, check that all the
connections are sealed correctly using leak detection
spray or soap suds. If any bubbles form, the system
has a leak and the screw connectors must be
retightened using an crescent or adjustable wrench.
IMPORTANT
Since the coupling works with tapping
rings, it may leak if you undo and
reconnect the pipes. This will also
void the warranty.
1
1
2
2
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