Lennox VESZC1 User manual

Owner's Manual

Commercial Air Conditioners

Model:

Multi-VRF Centralized Controller

VESZC1 D

Thank you for selecting LENNOX air conditioners. Please read this

manual carefully before operation and keep it for further reference.

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.

 All photos in this manual is only for reference, please refer to the actual product

for the final effect.

Contents

1 INSTALLATION ...................................................................................................... 1

1.1 INSTALLATION REQUIREMENTS .......................................................................... 2

1.2 WIRING INSTRUCTIONS...................................................................................... 3

1.3 INSTALLATION PROCEDURE ............................................................................... 6

1.4 REMOVAL PROCEDURE...................................................................................... 8

2 DISPLAY AND WORKING INSTRUCTIONS............................................................... 8

2.1 MAIN PAGE DISPLAY AND BUTTONS .................................................................. 9

2.2 GENERAL BUTTONS ........................................................................................... 9

2.3 BUTTONS WORKING INSTRUCTIONS................................................................ 10

3 FUNCTIONS DESCRIPTION .................................................................................. 12

3.1 HELP INFO........................................................................................................ 12

3.2 INDOOR UNIT.................................................................................................... 12

3.3 SINGLE UNIT CONTROL ................................................................................... 13

3.4 ALL-CONTROL FUNCTION ................................................................................ 16

3.5 GROUP CONTROL ............................................................................................ 17

3.6 SCHEDULE MANAGEMENT ............................................................................... 18

3.7 LOCAL SETTING ............................................................................................... 21

3.8 ENGINEERING SETTING ................................................................................... 23

3.9 ABOUT .............................................................................................................. 24

Multi-VRF Centralized Controller Operation Manual

1 INSTALLATION

Fig.1.1 Parts of Centralized Controller

No.

①

②

③

④

Name

Touch screen

Self-tapping screw ST4.2×9.5

（used to secure the rear cover

of controller）

Rear cover of

controller

Rubber band

QTY

No.

⑤

⑥

⑦

⑧

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

Fig.1.2 Dimension of Centralized Controller

Multi-VRF Centralized Controller Operation Manual

Fig.1.3 Dimension of Electric Box Cover

1.1 Installation Requirements

(1) Communication cord of the centralized controller must be selected according

to the table below. Never use the cable that is not in compliance with

instructions of this manual.

Network

Cord type

Cord

standard

Cord size

((mm2/AWG))

Total length

L(m/feet)

Remark

Indoor

network

Light/Ordin

ary

polyvinyl

chloride

sheathed

cord.

(60227

IEC 52

/60227 IEC

53)

IEC

60227-

5:2007

2×0.75~

2×1.25

(2×AWG18~

2×AWG16)

L≤1000m

(L≤3280-5/6feet)

If cord size is 2×1mm2

(2×AWG16),communica

tion cord can be

stretched longer. But the

total length can’t exceed

1500m(4921-1/4feet).

Outdoor

network

L≤250

(L≤820-1/5feet)

Total length of

communication cord

can’t exceed

250m(820-1/5feet).

Notice:

① The cord shall be Circular cord (the cores shall be twisted together).

② If unit is installed in places with intense magnetic field or strong interference, it

is necessary to use shielded wire.

(2) 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.

Multi-VRF Centralized Controller Operation Manual

1.2 Wiring Instructions

(1) Wiring Ports

Port print

G1, G2

F1, F2

A2, B2

A3, B3

L, N

Meaning

CAN comm.

port

【reserved port】

Power

port

(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) Connection Method

There are three methods to connect centralized controller with the air conditioning

system.

Method 1: Connect with indoor network

Fig.1.4 Centralized Controller Connected with Indoor Network

Multi-VRF Centralized Controller Operation Manual

Method 2: Connect with outdoor network

Fig.1.5 Centralized Controller Connected with Outdoor Network

Method 3: Connect with heat recollection mode converter Network

Fig. 1.6 Centralized Controller Connected with Heat Recollection Mode Converter

Network

Multi-VRF Centralized Controller Operation Manual

Wiring Instructions:

a. 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.

b. If the centralized controller is to be connected with the network of indoor units,

connect according to fig.1.4. The controller can connect with any one indoor unit in

series, that is, connect the controller’s G1 and G2 ports with the D1 and D2 ports

correspondingly with communication cords. When the controller is 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.

c. If the centralized controller is to be connected with the network of outdoor units,

connect according to fig.1.5. 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.

d. 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".

e. If the centralized controller is to be connected with the network of heat

recollection, connect according to Fig. 1.6. 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:

a) 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.

b) 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.

c) 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.

d) The centralized control address DIP switch (SA2_Addr- CC) on the master

unit of other refrigerating systems must be set as follows:

Note: The centralized control address switch of DIP5 invalidation

Multi-VRF Centralized Controller Operation Manual

SA2

Address

NO.

DIP1

DIP2

DIP3

DIP4

DIP5

e) The centralized control address DIP switch (SA2_Addr- CC) cannot be the

same between different refrigerating systems. Otherwise, address conflicts

may occur and the unit cannot run properly.

1.3 Installation Procedure

Fig.1.7 Installation Diagram

Multi-VRF Centralized Controller Operation Manual

Fig.1.8 Diagram of Wooden or Plastic Plug

Fig. 1.9 Installation Holes of the Electric Box Rear Cover

Fig.1.7 is a simple installation procedure of centralized controller. Please pay

attention to the following matters:

(1) Before installation, first cut off the power supply of indoor unit. The power must

be cut off during the whole installation process.

(2) During the installation, be careful not to damage to touch screen.

(3) Before installation, please make the following preparations:

1) In case that the centralized controller is installed on wall, dig a hole that is the

size of 180mm×107mm×62mm and peg 4 wooden or plastic plugs on the

wall according to fig.1.8.

2) In case that the centralized controller is installed inside the control cabinet, dig

4 installation holes on the surface of the control cabinet according to fig.1.9.

(4) In step ①, pull out the power core and communication cord, and then lead

them separately from the wire orifice of the electric box rear cover. Never lead

the cords through a same orifice.

(5) In step ②, locate the electric box rear cover to the installation holes of the wall

with screw ST4.2×16 FA.

(6) In step ⑥ pull out the wire connecting the touch screen and controller’s rear

cover. Put the touch screen on a safe place.

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