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Low ESP Fan Coil Indoor Unit

3.2 Location for Installation 

(1) The appliance shall not be installed in the laundry. 

(2) 

The top holder must be strong enough to support unit’s weight. 

(3) Drain pipe can drain water out easily. 

(4) There is no obstacle at inlet or outlet. Please ensure good air circulation. 

(5) In order to make sure the space for maintenance, please install the indoor unit according 

to the dimension described below. 

(6) Keep the unit away from heating source, inflammable gas or smoke. 

(7) This is a concealed ceiling type unit. 

(8) Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m from the TV 

set and radio. Otherwise, these electrical appliances may have image interference and 

noise. (Even if the distance is 1m, when there is strong electric wave, noise may still 

occur.) 

Fig 3.2 

Notes: 

Installation of the unit must be in accordance with National Electric Codes and local

regulations. 

Improper installation will affect unit’s performance, so do not install the unit by yourself.

Please contact local dealer to arrange professional technicians for the installation. 

Do not connect power until all installation work is finished.

3.3 Requirements for Communication Line 

Notes: 

If the unit is installed in the place with strong electromagnetic interference, shielded wire must 

be applied on the communication wire between indoor unit and wired controller. Twisted pair line 

with shielding function must be applied on the communication wire between indoor unit and indoor 

unit(outdoor unit). 

Summary of Contents for VRF VELD007N432U

Page 1: ...ler OA Outside Air Evaporator Types Thank you for selecting LENNOX air conditioners Please read this manual carefully before operation and keep it for further reference K 230 60 3 and 220 50 3 N 380V...

Page 2: ...ensuring reliability of complete unit maintaining normal communication and preheating refrigerant When the unit won t be used for a long time cut off the power of the complete unit However please pre...

Page 3: ...n and Drainage System Testing 12 4 4 Installation of Air Duct 15 4 5 Installation of Wired Controller 18 5 Wiring Work 19 5 1 Connection of Wire and Patch Board Terminal 19 5 2 Power Cord Cnnection 20...

Page 4: ...r supply carefully This air conditioner must be properly grounded through the receptacle to avoid electric shock The grounding wire shouldn t be connected with gas pipe water pipe lightning arrester o...

Page 5: ...en Never start or stop the air conditioner by inserting or removing the power cord Do not turn off the air conditioner until it runs for at least 5 minutes Otherwise oil return of the compressor will...

Page 6: ...oor temp and outdoor temp within 5 C If abnormal condition occurs e g unpleasant smell please turn off the unit at once and disconnect power supply Then contact LENNOX service center If the air condit...

Page 7: ...27 19 35 24 Rated Heating 20 15 7 6 Indoor Unit Working Temperature Range 16 C 32 C 2 3 Unit Functions Unit Functions Wired Controller VEWCL1B Standard Operation Mode Cooling Heating Fan Dehumidifyin...

Page 8: ...oor unit 2 M4X25 Screw Cross recessed small pan head screw 3 To fix the wired controller 3 Drain Hose Assembly 1 To connect with the hard PVC drain pipe 4 Special Nut 1 To be used for connecting the r...

Page 9: ...electrical appliances may have image interference and noise Even if the distance is 1m when there is strong electric wave noise may still occur Fig 3 2 Notes Installation of the unit must be in accord...

Page 10: ...in places with intense magnetic field or strong interference it is necessary to use shielded wire 3 3 2 Select communication line for indoor unit and outdoor unit Fig 3 3 2 Wire Type Total Length of...

Page 11: ...selection requirements Power cord size is based on BV single core wire 2 4pc at 40 Cambient temperature when laying across plastic pipe Air switch is D type and used at 40 C If actual installation co...

Page 12: ...e electric box and below unit s lower level 1 Below are the outline dimension applicable to indoor units of VELD007N432U VELD021N432U Fig 4 4 1 Below are dimensions of A B C etc for different models U...

Page 13: ...0 695 1379 565 1340 655 260 207 1153 220 1188 716 1 Drill bolt holes and install bolts 1 Stick the reference cardboard on the installation position drill 4 holes according to the hole site on the card...

Page 14: ...The washer fixing plate will prevent the washer from falling 3 The usage of paper pattern Refer to paper pattern of installation for ceiling opening dimension The center of ceiling opening is indicat...

Page 15: ...should be short and the gradient downwards should be at least 1 2 in order to drain condensation water smoothly 2 The diameter of drainage hose should be bigger or equal to the diameter of drainage pi...

Page 16: ...e distance between screw nut and hose smaller than 4mm metal clamp accessory drain hose accessory Fig 4 3 2 Fig 4 3 3 3 Use sealing plate to make the pipe clamp and hose insulated as shown in Fig 4 3...

Page 17: ...direction should be at least 1 2 If the raising pipe is vertical with the unit the raising height should be less than 800mm Fig 4 3 9 10 Drain pipes should have a downward slope of at least 1 2 in ord...

Page 18: ...revent air leakage The design and construction of air duct should comply with national requirements The edge of air return duct is suggested to be more than 150mm away from the wall Add a filter to th...

Page 19: ...utlet and Air return Opening 1 Range of Capacity 7000 21000 Fig 4 4 3 Air Outlet Fig 4 4 4 Air return Opening Model Size of Air Outlet Size of Air return Opening A B C D 121 528 580 161 121 728 780 16...

Page 20: ...end of the return air duct to the return air outlet of the unit by rivets and the other to the return air louver For the sake of the convenience to freely adjust the height a cutting of canvas duct wi...

Page 21: ...air duct is not be used 2 Install the round flange so that the fresh air duct can be connected as Fig 4 4 10 3 Sealing and heat preservation should be done for both the air pipe and round flange pipe...

Page 22: ...ion wires should be separated from power cord and connection wire between indoor unit and outdoor unit Adjust the static pressure via wired controller according to site circumstance 5 1 Connection of...

Page 23: ...5 3 Connection of Communication Wire between Indoor Unit and Outdoor Unit or indoor unit 1 Detach the electric box lid 2 Let the Communication cable pass through the wiring through holes 3 Connect th...

Page 24: ...roller 3 Wired controller and receiving light board can be installed at the same time When operating through a remote controller both wired controller and the receiving light board can receive the sig...

Page 25: ...it used in the environment with much dust please clean it regularly usually once every two weeks 6 2 Maintenance before the Seasonal Use 1 Check if the air inlet and air outlet of indoor and outdoor u...

Page 26: ...tage is too low Defect of main PC board The unit stops after running for a while The inlet or outlet of ODU or IDU are blocked by obstacle Poor cooling effect The filter is dirty Too heavy heat load o...

Page 27: ...Low ESP Fan Coil Indoor Unit 24...

Page 28: ...ct us at 1 305 718 2901 lennoxglobalhvac lennoxintl com 2018 Lennox Industries Inc For a complete list of the registered and common law trademarks owned by Lennox Industries Inc please visit www lenno...

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