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Summary of Contents for Lennox VEMD027N432U
- Page 1 VRF Indoor Units Installation Manual Medium ESP Fan Coil Indoor Unit VEMD027N432U VEMD031N432U VEMD034N432U VEMD038N432U VEMD042N432U VEMD048N432U Thank you for selecting LENNOX air conditioners. Please read this manual carefully before operation and keep it for further reference.
- Page 2 We have the right to make necessary revision to the product from time to time due to the reason of sales or production, and reserve the right to revise the contents without further notice. (7) The final right to interpret for this instruction manual belongs to LENNOX.
- Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product; (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer;...
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Page 4: Table Of Contents
Contents 1 Safety Notices (Please be sure to abide )............1 2 Product Introduction .................... 4 2.1 Names of Key Components ....................4 2.2 Rated Working Condition ....................4 3 Preparations for Installation ................. 5 3.1 Standard Fittings ........................ 5 3.2 Location for Installation ...................... -
Page 5: Safety Notices (Please Be Sure To Abide)
Multi Variable Air Conditioners Ducted Type Indoor Unit 1 Safety Notices (Please be sure to abide) Warning: If not abide strictly, it may cause severe damage to the unit or the people. Note: If not abide strictly, it may cause slight or medium damage to the unit or the people. - Page 6 Multi Variable Air Conditioners Ducted Type Indoor Unit R410A refrigerant can Please use specialized produce poisonous gas once accessories or parts to carry it meets fire, so please out installation, or water ventilate the room leakage, electric shock, fire immediately if refrigerant hazard may resulted.
- Page 7 (e.g. unpleasant smell), please turn off the unit at Do not repair the air once and disconnect power conditioner by yourself. supply. Then contact LENNOX Improper repair will cause service center. If the air electric shock or fire hazard. conditioner continues to...
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Page 8: Product Introduction
Multi Variable Air Conditioners Ducted Type Indoor Unit 2 Product Introduction 2.1 Names of Key Components Fig 2.1 ① ② ③ Name Air Outlet Air-return Opening Drain Pipe 2.2 Rated Working Condition Indoor Side Condition Outdoor Side Condition Dry Bulb Temp ℃ Wet Bulb Temp ℃... -
Page 9: Preparations For Installation
Multi Variable Air Conditioners Ducted Type Indoor Unit 3 Preparations for Installation Note: Product graphics are only for reference. Please refer to actual products. Unspecified measure unit is mm. 3.1 Standard Fittings Please use the supplied standard fittings listed below as instructed. Name Appearance Q'ty... -
Page 10: Requirements For Communication Line
Multi Variable Air Conditioners Ducted Type Indoor Unit (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. -
Page 11: Wiring Requirements
(1) Power Cord Size and Air Switch Capacity Air Switch Minimum Sectional Minimum Sectional Capacity Area of Ground Wire Area of Power Cord Model Power Cord Size （A） （mm ） （mm ） VEMD027N432U VEMD031N432U VEMD034N432U 220-240V-1ph-50Hz 208-230V-1ph-60Hz VEMD038N432U VEMD042N432U VEMD048N432U... -
Page 12: Installation Instructions
Multi Variable Air Conditioners Ducted Type Indoor Unit Notes: ① Use copper wire only as unit’s power cord. Operating temperature should be within its rated value. ② If the power cord is more than 15m long, please increase properly the sectional area of power cord to avoid overload, which may cause accident. - Page 13 Multi Variable Air Conditioners Ducted Type Indoor Unit Below are dimensions of A, B, C, etc. for different models: Unit: mm Model VEMD027N432U 1236 1200 1016 1050 VEMD031N432U VEMD034N432U VEMD038N432U 1379 1340 1153 1188 VEMD042N432U VEMD048N432U 4.1.2 Suspend the indoor unit (1) Drill bolt holes and install bolts 1) Stick the reference cardboard on the installation position;...
- Page 14 Multi Variable Air Conditioners Ducted Type Indoor Unit Fig 4.1.6 NOTES! ① Before operation, please prepare all pipelines (connection pipe, drainage hose) and wires (connection wire for wired controller, connection wire for indoor unit). ② When drilling holes on ceiling (air return outlet or air outlet), you can need to reinforce the ceiling to prevent vibration.
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Page 15: Refrigerant Pipe Connection
Multi Variable Air Conditioners Ducted Type Indoor Unit 4.2 Refrigerant Pipe Connection (1) Aim the flaring port of copper pipe at the center of screwed joint and then tighten the flaring nut with hand as shown in fig 4.2. (2) Tighten the flaring nut with torque wrench. Torque for tightening nut Pipe diameter (mm) Torque (N·m) -
Page 16: Drainage Pipe Installation
Multi Variable Air Conditioners Ducted Type Indoor Unit Fig 4.3.1 4.3.2 Drainage Pipe Installation (1) Insert the drain hose into the drain hole and tighten it with tapes, as shown in Fig 4.3.2. (2) Tighten the pipe clamp, with the distance between screw nut and hose smaller than 4mm. - Page 17 C. Fig 4.3.9 model A(mm) B(mm) C(mm) VEMD027N432U VEMD031N432U VEMD034N432U VEMD038N432U VEMD042N432U VEMD048N432U (10) Drain pipes should have a downward slope of at least 1%~2%, in order to prevent pipes from sagging, install hanger bracket at intervals of 1000~1500mm.
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Page 18: Installation Of Air Duct
Multi Variable Air Conditioners Ducted Type Indoor Unit 1) In case of commissioning finished, please energize the IDUs and switch to cooling or dry mode, meanwhile, the water pump operates, you can check the draining through the transparent part of drain socket. 2) If communication wire is not connected, communication malfunction “C0”... - Page 19 Multi Variable Air Conditioners Ducted Type Indoor Unit 4.4.1 Installation of Air-out Duct (1) Installation of the Rectangular Duct Fig 4.4.1 Name Name Hanger Rod Static Pressure Box Return Air Duct Filter Screen Canvas Duct Main Supply Air Duct Return Air Inlet Supply Air Outlet (2) Installation of Circular Duct Fig 4.4.2...
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Page 20: Installation Of The Return Air Duct
Multi Variable Air Conditioners Ducted Type Indoor Unit Fig 4.4.6 Air-return Opening Size of Air Outlet Size of Air-return Opening Model VEMD027N432U 1016 1050 VEMD031N432U VEMD034N432U 1153 1188 VEMD038N432U VEMD042N432U VEMD048N432U 4.4.3 Installation of the Return Air Duct (1) The default installation location of the rectangular flange is at the back and the return air cover plate is at the bottom, as shown in Fig 4.4.7. -
Page 21: Installation Of Wired Controller
Multi Variable Air Conditioners Ducted Type Indoor Unit Fig 4.4.8 Name Name Return Air Inlet (with filter) Indoor unit Canvas Duct Supply Air Duct Return Air Duct Grille 4.4.4 Installation of the Fresh Air Pipe (1) When the fresh air pipe is needed to be connected, cut the fresh air baffle as Fig 4.4.9. Plug up the gap of the fresh air baffle by sponge if the fresh air duct is not be used. -
Page 22: Wiring Work
Multi Variable Air Conditioners Ducted Type Indoor Unit 5 Wiring Work Warning! Before obtaining access to terminals, all supply circuits must be disconnected. Notes: ① Units must be earthed securely, or it may cause electric shock. ② Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring could cause malfunction or even damage the unit. -
Page 23: Power Cord Connection
Multi Variable Air Conditioners Ducted Type Indoor Unit 5.2 Power Cord Connection Warning! ① Every unit should be equipped with a circuit breaker for short-circuit and overload protection. ② During operation, all indoor units connected to the same outdoor unit system must be kept energized status. -
Page 24: Connect Communication Wire Of Wired Controller
Multi Variable Air Conditioners Ducted Type Indoor Unit (5) For more reliable communication, make sure connect the terminal resistor to the most downstream IDU of the communication bus (terminal D1 and D2), as shown in fig 5.3.2, terminal resistor is provided with each ODU. 5.4 Connect Communication Wire of Wired Controller （1）... - Page 25 Multi Variable Air Conditioners Ducted Type Indoor Unit Fig 5.5...
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Page 26: Setting Of External Static Pressure
Multi Variable Air Conditioners Ducted Type Indoor Unit 6 Setting of External Static Pressure Working range for external static pressure of this series of duct type unit is 0 Pa~80 Pa. For corresponding external static pressure to the respective static pressure notch please see as below. -
Page 27: Table Of Error Codes For Indoor Unit
Multi Variable Air Conditioners Ducted Type Indoor Unit 8 Table of Error Codes for Indoor Unit Error Error Error Content Content Content Code Code Code Quantity Of Group Water Temperature Indoor Unit Error Control Indoor Units Error Setting Error Indoor Fan Indoor Units Jumper Cap Error Protection... -
Page 28: Troubleshooting
Multi Variable Air Conditioners Ducted Type Indoor Unit 9 Troubleshooting The air conditioner is not expected to be serviced by users. Incorrect repair may cause electric shock or fire, so please contact an authorized service center for professional service. The following checks prior to contact may save your time and money. Phenomenon Troubleshooting ①... - Page 32 Contact us at +1-305-718-2901 LennoxGlobalHVAC@lennoxintl.com 2020 Lennox Industries Inc. For a complete list of the registered and common law trademarks owned by Lennox Industries Inc., please visit www.lennoxglobal.com...
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