Mitsubishi Heavy Industries HMK60, Installation Manual

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6
Safety precautions
fan can start unexpectedly, which can cause
personal injury.
Do not touch any refrigerant pipes
when the system is in operation.
During operation the refrigerant pipes become
extremely hot or extremely cold depending the
operating condition, and it can cause burn injury
or frost injury.
This manual is only for outdoor units
connected to HSB series and HMK
series.
When you connect other indoor units to outdoor
units, please refer to other manual.
Notabilia for units designed for R410A
Only use R410A refrigerant. R410A is the
refrigerant whose pressure is 1.6 times as high as
that of conventional refrigerant.
The size of charging port of service valve and
check joint for R410A are altered from that for
conventional refrigerant in order to prevent the
system being charged with the incorrect
refrigerant by mistake. And the protruding
dimension of pipe for flare processing and flare
nut size for R410A are also altered from that for
conventional refrigerant in order to reinforce
strength against the pressure for R410A.
Accordingly the dedicated tools for R410A listed
in the below mentioned table should be prepared
for installation and servicing.
Dedicated tools for R410A
a) Gauge manifold
b) Charge hose
c) Electronic scale for refrigerant charge
d) Torque wrench
e) Flare tool
f) Protrusion control gauge for copper pipe
g) Vacuum pump adapter
h) Gas leak detector
Do not use charging cylinder. Using charging
cylinder may alter the composition of refrigerant,
which results in making the performance of the
system worse.
Refrigerant must be charged always in liquid state
from the bottle.