Fill The Name Of Connected System; Caution On Refrigerant Leakage; Turn Over To Customer; Dimension And The Quantity Of Electric Wire - Midea MDV-D252W/CS Installation Manual

FILL THE NAME OF CONNECTED SYSTEM

To clearly identify the connected systems between
two or more indoor units and outdoor unit, select
names for every system and record them on the
nameplate on the outdoor electric control box cover.
Model (indoor unit)
Room Name
E.g.: Indoor unit (A) of the
first system on second floor
is recorded as: 2F 1A.

CAUTION ON REFRIGERANT LEAKAGE

This air conditioner adopts R22 as refrigerant, which is
safe and noncombustible. The room for air conditioner
should be big enough that refrigerant leakage can not
reach the critical thickness. Besides this, you can take
some action on time.
Critical thickness
without any harm to person. R22 critical
3
thickness: 0.3 [ kg/m ]
Outdoor unit
Indoor unit
Room full of leaking refrigerant
(All the refrigerant has leaked)
Calculate the critical thickness through following
steps, and take necessary actions.
1. Calculate the sum of the charge volume (A[kg])
Total refrigerant volume= refrigerant volume when
delivered(13[kg])+superaddition
2. Calculate the indoor cubage (B[m ]) (as the
minimum cubage)
3. Calculate the refrigerant thickness
A [ kg]
Critical thickness 0.3 [
3
B [ m ]
Countermeasure against overhigh thickness
1. Install mechanical ventilator to reduce the refrigerant
thickness under critical level. (ventilate regularly)
2. Install leakage detector alarming device related to
mechanical ventilator if you can not regularly
ventilate.
the max thickness of Freon
3
3
kg/m ]
b.
Leakage detector alarming device
related to mechanical ventilator
OA
(Leakage detector alarming device should
be installed in places easily keeping refrigerant)

TURN OVER TO CUSTOMER

The owner's manuals of indoor unit and outdoor
unit and Service manual must be turned over to
the customer.
Particularize the contents in the owner's manual
to the customers.

Dimension and the quantity of electric wire

Name
Type
Signal wire
of indoor/ 2-core
outdoor unit
1. Signal wire of indoor/outdoor unit adopts 2-core shielded
wire which has polarity. For least interference, the closed
ends of shield wire should be connected continuously and
the shielding layer should be connected to the end E on
outdoor terminal block.
2. 5-core shield wire is used for wire controller (terminals
A, B, C, D and E)
3. The controlling between indoor and outdoor units is
realized by RS485 communication, and the address is
set while installation.
Signal wire of indoor/outdoor unit and wiring
of wire controller belong to low voltage circuit,
which should not contact power cord with high
voltage.
Indoor unit
a.
Ventilation
peristome
Size
2
0.75mm 500m RVVP-0.75mmx 2
CAUTION
2