Gree CE52-24/F(C) User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Centralized Controller
Model:
CE52-24/F(C)

To Users
Thank you for selecting Gree product. Please read this instruction manual
carefully before installing and using the product, so as to master and correctly use
the product. In order to guide you to correctly install and use our product and
achieve expected operating effect, we hereby instruct as below:
(1) This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsibility for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
(2) This instruction manual is a universal manual, some functions are only
applicable to particular product. All the illustrations and information in the
instruction manual are only for reference, and control interface should be
subject to actual operation.
(3) All the illustrations and information in the instruction manual are only for
reference. In order to make the product better, we will continuously
conduct improvement and innovation. If there is adjustment in the product,
please subject to actual product.
(4) If the product needs to be installed, moved or maintained, please contact
our designated dealer or local service center for professional support.
Users should not disassemble or maintain the unit by themselves,
otherwise it may cause relative damage, and our company will bear no
responsibilities.

Contents
1 Safety Notices (Please be sure to abide).........................1
2 User Notice.........................................................................1
3 Installation..........................................................................2
3.1 Installation Requirements .......................................................3
3.2 Wiring Instructions ..................................................................5
3.3 Installation Procedure...........................................................14
3.4 Removal Procedure ..............................................................16
4 Display and Working Instructions..................................16
4.1 Main Page Display and Buttons............................................17
4.2 General Buttons....................................................................18
4.3 Buttons Working Instructions ................................................19
5 Functions Description.....................................................21
5.1 Help Info................................................................................21
5.2 VRF Unit ...............................................................................21
5.3 Single Unit Control................................................................22
5.4 Water/Floor Control...............................................................25
5.5 Fresh Air Control...................................................................30
5.6 All-Control Function...............................................................32
5.7 Group Control .......................................................................34
5.8 Schedule Management.........................................................35
5.9 L-CAC&Split Unit ..................................................................38
5.10 Local Setting.......................................................................42
5.11 Engineering Setting.............................................................44
5.12 About...................................................................................46

Centralized Controller
1
1 Safety Notices (Please be sure to abide)
WARNING:If not abide them strictly, it may cause severe damage to the
unit or the people.
NOTE:If not abide them strictly, it may cause slight or medium damage to
the unit or the people.
This sign indicates that the items must be prohibited. Improper operation
may cause severe damage or death to people.
This sign indicates that the items must be observed. Improper operation
may cause damage to people or property.
WARNING!
This product can’t be installed at corrosive, inflammable or explosive environment
or the place with special requirements, such as kitchen. Otherwise, it will affect the
normal operation or shorten the service life of the unit, or even cause fire hazard or
serious injury. As for the above special places, please adopt special air conditioner
with anti-corrosive or anti-explosion function.
2 User Notice
All indoor units must be supplied with unified power.
Make sure communication cord is connected with the proper port, otherwise
there may occur communication malfunction.
Never knock on, throw or frequently detach the centralized controller.
Never operate the centralized controller with wet hands.
Never scratch the screen of centralized controller by hard or sharp objects.
If the centralized controller is connected with the outdoor network or the last
indoor unit of the indoor network, then a matching resistance must be
connected between G1 and G2 ports.
the centralized controller Connect with L-CAC&Split unit, The indoor unit
address must be set within the range from 1 to 36, communication way of
L-CAC&Split unit set long distance monitoring mode.

Centralized Controller
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3 Installation
Fig.3.1 Parts of Centralized Controller
No. ①②③④
Name Touch
screen
Self-tapping screw
ST4.2×9.5 MC(used to
secure the rear cover of
controller)
Rear cover of
controller Rubber band
QTY
1
4
1
6
No. ⑤⑥⑦⑧
Name
Screw
M4×12
(used to
secure
earthing
wire)
Screw ST4.2×16 FA
(used to secure electric
box cover)
Electric box
cover Matching resistance
QTY
1
4
1
2

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Unit:mm
Fig.3.2 Dimension of Centralized Controller
Unit:mm
Fig.3.3 Dimension of Electric Box Cover
3.1 Installation Requirements
(1) Communication cord of the centralized controller and Multi-VRF (CAN
Network) must be selected according to the table below. Never use the
cable that is not in compliance with instructions of this manual.

Centralized Controller
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Network
Cord
type
Cord
standard
Cord size
(mm
2
/AWG)
Total length
L(m/feet)
Remark
Indoor
network
Light/
Ordinary
polyvinyl
chloride
sheathe
d cord.
(60227
IEC 52
/60227
IEC 53)
IEC
60227-
5:2007
2×0.75~
2×1.25 (2×
AWG18~2×
AWG16)
L≤1000m
(L≤3280-5/6
feet)
If cord size is 2×
1mm2(2×AWG16),
communication cord
can be stretched
longer. But the total
length can’t exceed
1500m(4921-1/4feet).
Outdoor
network
L≤500
(L≤820-1/5f
eet)
Total length of
communication cord
can’t exceed
500m(820-1/5feet).
NOTICE:
①The cord shall be Circular cord (the cores shall be twisted together).
②If unit is installed in places with intense magnetic field or strong interference, it
is necessary to use shielded wire.
(2) Communication cord of the centralized controller and L-CAC&Split Unit
(Modbus net) must be selected according to the table below.
Cord type Cord size (mm2) Cord standard Note
Two_core
five twisted
pair 24AWG(2×0.6mm)
TIA/EIA-568-A
When the
communication
distance exceeds
800m,the need to
increase the
photoelectric
isolation repeter
(3) Never install the centralized controller in the following places:
1) Places with corrosive gas or serious dust, salt mist or oil smoke.
2) Wet and damp places, with direct sunlight.
3) Places near high temperature objects or places where units might be
splashed by water.

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3.2 Wiring Instructions
3.2.1 Wiring Ports
Port print
G1, G2
F1, F2
A2, B2
A3, B3
L, N
Meaning
CAN
comm.
port
fire alarm port 【reserved
port】L-CAC&Split
unit port Power port
3.2.2 Power Supply
The centralized controller shall use independent power supply.
The range of input voltage: 100~240 VAC; Frequency range: 50/60Hz
Select power cord according to the following table. Never use the power cord
that is not in compliance with instructions of this manual.
Cord type Cord standard Cord size (mm2)
Single-cord soft
conductiveunsheathed
cord
(60227 IEC 08)
IEC 60227-3:2007 1.5
3.2.3 Connection Method of Multi-VRF (CAN Network)
There are three methods to connect centralized controller with the Multi-VRF
system.
Method 1: Connect with indoor network
Fig.3.4 Centralized Controller Connected with Indoor Network

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Method 2: Connect with outdoor network
Fig.3.5 Centralized Controller Connected with Outdoor Network
Method 3: Connect with heat recollection mode converter Network
Fig. 3.6 Centralized Controller Connected with Heat Recollection Mode Converter
Network

Centralized Controller
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Wiring Instructions:
(1) The centralized controller is applicable to multi VRF units, connectable with
network of indoor units or the network of outdoor units. One centralized
controller can control up to 16 sets of outdoor system and up to 255 sets of
indoor unit.
(2) If the centralized controller is to be connected with the network of indoor units,
connect according to fig.3.4. The centralized controller can only be connected
with the terminal unit of indoor network. A matching resistance needs to be
added with the communication cords at the G1 and G2 ports.
(3) If the centralized controller is to be connected with the network of outdoor units,
connect according to fig.3.5. The centralized controller can only be connected
with the terminal system of the outdoor network. A matching resistance needs
to be added with the communication cords at the G1 and G2 ports.
(4) The centralized control address DIP switch (SA2_Addr-CC) indicates the
centralized control address required when different refrigerating systems are
controlled in a centralized manner. The default factory setting is "00000".
(5) If the centralized controller is to be connected with the network of heat
recollection, connect according to Fig.3.6. The method 2 is also applicable to
centralized controller switching in heat recollection network.
If the centralized controller is to be connected with the network of outdoor units,
set the DIP switch according to the following methods:
1) The DIP switch must be set on the master unit and set the Master Unit
Setting DIP Switch(SA8) to "00". Otherwise, the setting is invalid.
2) On the same refrigerating system, the centralized control address DIP switch
(SA2_Addr-CC) on a non-master unit is invalid, and it is unnecessary to change
the settings.
3) The centralized control address DIP switch (SA2_Addr- CC) on the master
unit of a refrigerating system must be set to “0000/”, and this system is the
master system.
4) The centralized control address DIP switch (SA2_Addr- CC) on the master
unit of other refrigerating systems must be set as follows: