Mitsubishi Electric CITY MULTI PUMY-P NHMU, Installation Manual

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already included when the outdoor unit is shipped. Thus, if the total extended piping
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additional refrigerant charge using the procedure shown below.
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with any refrigerant.
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Additional
refrigerant charge
=
Liquid pipe size
Total length of
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+
Liquid pipe size
Total length of
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–
Refrigerant
amount for outdoor
unit
kg
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(m) ×
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×
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(m) ×
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×
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3.0 kg
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(Please see the lower half of Fig. 4-1.)
Outdoor model : P48
Indoor
3 $ ¡>@ P>IW@ D¡>@ P>IW@
3
E¡>@ P>IW@
3 F¡>@ P>IW@
3 G¡>@ P>IW@
The total length of each liquid line is as follows
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Therefore,
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Additional
refrigerant charge = 45 m × 0.06 kg + 40 m × 0.024 kg – 3.0 kg = 0.7 kg (rounded up)
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When drain piping is necessary, use the drain socket or the drain pan (option).
3ā3
Drain socket PAC-SG61DS-E
Drain pan PAC-SG64DP-E
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1
Follow ordinance of your governmental organization for technical standard related
to electrical equipment, wiring regulations and guidance of each electric power
company.
2
Wiring for control (hereinafter referred to as transmission line) shall be (5 cm [2
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noise from power source wiring. (Do not insert transmission line and power source
wire in the same conduit.)
3
Be sure to provide designated grounding work to outdoor unit.
4
Give some allowance to wiring for electrical part box of indoor and outdoor units,
because the box is sometimes removed at the time of service work.
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connected, electrical parts will be burnt out.
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systems are wired with the same multiplecore cable, the resultant poor transmit-
ting and receiving will cause erroneous operations.
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7
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for outdoor unit transmission.
(Transmission line to be connected with indoor unit : Terminal block TB3 for
transmission line, Other : Terminal block TB7 for centralized control)
Erroneous connection does not allow the system to operate.
8
In case to connect with the upper class controller or to conduct group operation in
different refrigerant systems, the control line for transmission is required between
the outdoor units each other.
Connect this control line between the terminal blocks for centralized control. (2-
wire line with no polarity)
When conducting group operation in different refrigerant systems without connect-
ing to the upper class controller, replace the insertion of the short circuit connector
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9
Group is set by operating the remote controller.
At the
conditions
below:
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only. The stop valve shape, service port
position, etc., may vary according to the
model.
* Turn section
A
only.
(Do not further tighten sections
A
and
B
together. )
C
Charge hose
D
Service port
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Do not tighten the service port too much when installing it, otherwise, the valve core
could be deformed and become loose, causing a gas leak.
After positioning section
B
in the desired direction, turn section
A
only and tighten it.
Do not further tighten sections
A
and
B
together after tightening section
A
.
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B
G
H
E
D
I
(2)
1 2
(2) Liquid side (Fig. 4-7)
1
Remove the cap and turn the valve rod counterclockwise as far as it will go with
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stopper.
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10 revolutions)
2
Make sure that the stop valve is open completely, push in the handle and rotate
the cap back to its original position.
A
Valve
B 8QLWVLGH
C
Handle
D
Cap
E
Local pipe side
F
Open position side
G
Service port
H
Wrench hole
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Operation section
Refrigerant pipes are protectively wrapped
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before or after connecting the pipes. Cut out the knockout in the pipe cover following
the groove and wrap the pipes.
Pipe inlet gap
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-
main.
(If the gaps are not closed, noise may be emitted or water and dust will enter the
unit and breakdown may result.)