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1 1 1 53 5 0 1 8 5 VRF 4-Way Cassette air conditioner For commercial use Model name: สํํ า หร้ บ ใช ง านเชิ ง พาณิิ ช ย์์ 40VU____S-8S-TST Installation Manual Notice: is committed to continuously improving its products to ensure the highest quality and reliability standards, and to meet local regulations and market requirements.
– 1 – Contents Original instruction Please read this Installation Manual carefully before installing the Air Conditioner. • This Manual describes the installation method of the indoor unit. 1 Precautions for safety ....................3 • For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit. 2 Accessory parts ......................
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Thank you for purchasing this air conditioner. Definition of Protective Gear Please read carefully through these instructions that contain important information and ensure that you understand When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves them.
– 3 – Warning indications on the air conditioner unit Precautions for safety Warning indication Description The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual. WARNING WARNING ELECTRICAL SHOCK HAZARD WARNING ELECTRICAL SHOCK HAZARD Disconnect all remote...
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• Wear protective gloves and safety work clothing during • Do not install in a location where flammable gas leaks are installation, servicing and removal. possible. If the gas leak and accumulate around the unit, it may • Do not touch the aluminium fin of the unit. You may injure yourself ignite and cause a fire.
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– 5 – Refrigerant piping • Connect earth wire. (Grounding work) Incomplete grounding • Install the refrigerant pipe securely during the installation causes an electric shock. work before operating the air conditioner. If the compressor • Do not connect earth wires to gas pipes, water pipes, and is operated with the valve open and without refrigerant pipe, lightning conductor or telephone earth wires.
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• After the work has finished, use an insulation tester set CAUTION (500V Megger) to check the resistance is 1MΩ or more between New refrigerant air conditioner installation the charge section and the non-charge metal section • This air conditioner adopts the new HFC refrigerant (Earth section).
– 7 – Accessory parts Selection of installation place Accessory parts WARNING y Install the air conditioner at enough strong place to withstand the weight of the unit. Part name Q’ty Shape Usage If the strength is not enough, the unit may fall down resulting in injury. y Install the air conditioner at a height 2.5 m or more from the floor.
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Installation space REQUIREMENT y When using the air conditioner with 2-way / 3-way discharge system, a strong wind blows directly if the ceiling Secure the specified space in the figure for installation and servicing. height is lower than the standard. Model A mm Therefore, change the setting switch according to height of the ceiling.
– 9 – Installation Opening a ceiling and ◆ Treatment of ceiling installation of hanging bolts The ceiling differs according to structure of building. For details, consult your constructor or interior finish REQUIREMENT y Consider the piping / wiring before the unit is hung contractor.
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◆ Installation of ceiling opening Installation of ceiling panel Wireless type Level vial (levelness: 5 mm or less) Hanging bolt Indoor unit and hanging bolt (Sold separately) The sensor of indoor unit with wireless remote controller can receive a signal by distance within Install the ceiling panel according to Hanging bolt approx.
– 11 – Drain piping Connecting drain pipe Check the draining In the test run, check that water drain is properly y Connect a hard socket (Locally procured) to the hard y For length of the traversing drain pipe, restrict to CAUTION performed and water does not leak from the 20 m or less.
Refrigerant piping y Test water drain while checking the operation sound of the drain pump motor. (If the operation sound changes from continuous Projection margin in flaring: B (Unit: mm) sound to intermittent sound, water is normally CAUTION drained.) After the check, the drain pump motor runs, Outer dia.
– 13 – Airtight test / Air purge, etc. Electrical connection y Use the tightening torque levels as listed in the following table. For airtight test, air purge, addition of refrigerant, Outer dia. of connecting and gas leak check, refer to the Installation Manual Tightening torque (N·m) WARNING pipe (mm)
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q Power supply Remote controller wiring Power supply 220V ~, 50Hz y 2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring. Power supply switch / circuit breaker or power supply wiring / fuse rating for indoor units should be selected by the Remote controller wiring, remote controller inter-unit Wire size: 0.5 mm²...
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– 15 – Wiring between indoor and outdoor units 1. Remove the cover of the electrical control box by taking off the mounting screws (2 positions) and pushing the hooking section. (The cover of the electrical control box remains hanged to the hinge.) 2.
Installing indoor unit on high Applicable controls Each time [ ] [ ] setting button is pushed, ceiling indoor unit numbers in the group control change cyclically. Select the indoor unit to Applicable controls setup REQUIREMENT change settings for. When an indoor unit is installed on a ceiling higher (settings at the site) y The fan of the selected indoor unit runs.
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– 17 – Change of lighting time of How to set up louver lock Cancelling louver lock Group control filter sign (No swing) Set the wind direction to “0000” of the louver lock In a group control, a remote controller can control up to setup procedure above.
Test run After the test run, push OFF timer button to Repeat procedures → → → stop a test run. Indicators “Operation” (green), “Timer” ([TEST] disappears on the display and the air (green), and “Ready” (orange) in the Before test run CAUTION conditioner enters the normal stop mode.) wireless receiver section flash in approx.
– 19 – Maintenance Cleaning discharge louver The discharge louver can be removed to clean. 1. Remove the discharge louver. q Cleaning of air filter Use a vacuum cleaner to remove dust y Holding the both ends of the discharge louver, y Be sure to stop the air conditioner before cleaning from the air filter or wash them with remove the louver sagging the centre downward.
q Periodic Maintenance Troubleshooting For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner in use be cleaned and maintained regularly to ensure efficient operation of the air conditioner. When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended. ...
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– 21 – Check method On the wired remote controller, central control remote controller and the interface P.C. Board of the outdoor unit (I/F), a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. Board) to display the operation is provided.
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– 23 – Check code Wireless remote controller Outdoor unit 7-segment display Sensor block display of receiving unit Check code name Judging device Wired remote controller display Auxiliary code Operation Timer Ready Flash ─ Model mismatch of indoor and outdoor unit ─...
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Check code Wireless remote controller Outdoor unit 7-segment display Sensor block display of receiving unit Check code name Judging device Wired remote controller display Auxiliary code Operation Timer Ready Flash 01: Comp. 1 side 02: Comp. 2 side IPM short protection trouble Inverter 03: Comp.
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– 25 – Warnings on Refrigerant Leakage Important Check of Concentration Limit 2) When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas (opening The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the leaking out, its concentration will not exceed a set limit.
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