Mitsubishi Electric M-SERIES, Manual

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M series
C-554
MULTI SYSTEM Inverter Heat Pump
MUL
TI
SYSTEMS
INST
ALLA
TION
PROCEDURE
These explanation are excerpted
from the installation manual.
MXZ-3B54VA MXZ-3B68VA MXZ-4B71VA
SPECIFICATIONS
Model
Power supply *1 Wire specifications *2 Pipe length and height dif ference *4, *5, *6, *10
Rated
V oltage
Fre-
quency
Breaker
capacity
Power supply
Indoor/outdoor
c onn ec ting wire
Max. pipe length
per indoor unit /
for multi-system
Max.
height dif ference
Max. no. of bends
per indoor unit /
for multi system
Refrigerant adjust -
ment A *7
MXZ-3B54VA
230 V 50 Hz 25 A 3-core 2.5 mm
2
4-core
1.0/1.5 mm
2
25 m / 50 m
15 m
25 / 50
20 g/m MXZ-3B68VA
25 m / 60 m
MXZ-4B71VA 25 / 60
*1 Connect to the power switch which has a gap of 3 mm or more when open
to interrupt the source power phase. (When the power switch is shut off, it
must interrupt all phases.)
*2 Use wires in conformity with design 60245 IEC 57. Use the indoor/outdoor
connecting wire in conformity with the wire specifications specified in the
installation manual of the indoor unit.
*3 Never use pipes with thickness less than specified. The pressure resist -
ance will be insufficient.
*4 Use a copper pipe or a copper-alloy seamless pipe.
*5 Be care ful not t o crus h or ben d th e pipe during pipe bending.
*6 Refrigerant pipe bending radius must be 100 mm or more.
*7 If pipe length exceeds 40 m, additional refrigerant (R410A) charge is re-
quired. (No additional charge is required for pipe length less than 40 m.)
Additional refrigerant = A × (pipe length (m) - 40)
*8 Insulation material : Heat resisting foam plastic 0.045 specific gravity
*9 Be sure to use the insulation of specified thickness. Excessive thickness
ma y c au se in correc t in s tallation of th e indoo r unit an d in suf ficient thi c k -
ness may cause dew drippage.
*10 If the outdoor unit is installed higher than the indoor unit, max. height
difference is reduced to 10 m.
SELECTING PIPE SIZE AND OPTIONAL DIFFERENT-DIAMETER JOINTS
The diameter of connection pipes differs according to the type and capacity of indoor units. Match the diameters of connection pipes for indoor and outdoor
units according to the following table.
• If the diameter of connection pipes does not match the diameter of pipe end connections, use optional different-diameter joints.
Outdoor unit
Indoor unit
15/20/22/25/35/42 50 60
MXZ-
3B54VA
MXZ-
3B68VA
MXZ-
4B71VA
Pipe size
liquid (W all thickness) / gas (W all thickness)
6.35 (0.8) / 9.52 (0.8) 6.35 (0.8) / 12.7 (1.0) 6.35 (0.8) / 15.88 (1.0)
- A UNIT 6.35 (0.8) / 12.7 (1.0) - / MAC-A455JP - / - - / MAC-A456JP
A UNIT B UNIT
6.35 (0.8) / 9.52 (0.8) - / - - / MAC-454JP - / PAC-SG76RJ B UNIT C UNIT
C UNIT D UNIT
If you use commercially available copper pipes, use the C1220t for the R410A.
(Unit: mm)
INSTALLATION DIAGRAM
Units should be installed by licensed contractor according to local code requirements.
After the leak test, apply insulat-
ing material tightly so that there is
no gap.
When the piping is to be at-
tached to a wall containing metals
(tin plated) or metal netting, use
a chemically treated wooden
piece 20 mm or thicker between
the wall and the piping or wrap 7
to 8 turns of insulation vinyl tape
around the piping.
To use existing piping, perform
COOL operation for 30 minutes
and pump down before removing
the old air conditioner. Remake
flare according to the dimension
for new refrigerant.
ACCESSORIES
Check the following parts before installation.
(1) Drain socket 1
(2) Drain cap 2
PARTS TO BE PROVIDED AT YOUR SITE
(A) Power supply cord* 1
(B) Indoor/outdoor unit connecting wire* 1
(C) Extension pipe (Refer to 1-4.) 1
(D) Wall hole cover 1
(E) Piping tape 1
(F)
Extension drain hose
(or soft PVC hose, 15 mm inner
diameter or hard PVC pipe VP16)
1
(G) Refrigeration oil
Little
amount
(H) Putty 1
(I) Pipe fixing band 2 to 7
(J) Fixing screw for (I) 2 to 7
(K) Wall hole sleeve 1
(L)
Soft PVC hose, 15 mm inner di-
ameter or hard PVC pipe VP16 for
drain socket
1
* Note:
Place indoor/outdoor unit connecting wire (B) and
power supply cord (A) at least 1 m away from the
TV antenna wire.
The “Q’ty” for (B) to (K) in the above table is quan-
tity to be used per indoor unit.
MXZ-4B71VA
More than
100 mm
Open as a rule
More than 500 mm
if the front and both
sides are open
More than 100 mm More than
200 mm if there are obstacles to
both sides
Open as a rule
More than 500 mm if the back,
both sides and top are open
More than 350 mm
Outdoor unit installation
330
Air inlet
166 500
Air inlet
4-10 × 21 Oval holes
361 396
Air outlet
835
(Unit: mm)