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Summary of Contents for Lennox EMEA INNOV DMREF- R
- Page 1 INSTALLATION, USE AND MAINTENANCE MANUAL INNOV@ DMREF- R Air Conditioning Units for Close Control Application INNOV@-DMREF-R- IOM-0922-EN www.lennoxemea.com...
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Page 3: Table Of Contents
Index General Description ......................4 Structure ............................5 Application limits ..........................5 Cooling circuit ..........................5 “CW” units hydraulic section ......................6 Installation warnings ........................7 Inspection / Transport / Positioning ................... 8 Inspection on receipt ........................8 Lifting and transport ......................... 8 Unpacking ............................ -
Page 4: General Description
General Description DMREF R” “CCAC” self-contained units are specially designed for installation in technological environments such as Computer rooms, laboratories and in general where a high precision in climate control and a 24h/day operation are requested. NEW DMREF”R” units represent the state of the art between technology and design as well as all LENNOX products: thanks to their characteristics, NEW DMREF R can be installed also in offices where people are working. -
Page 5: Structure
Structure DMREF R” units are designed with a self supporting frame and all components are produced using sophisticated computer driven machines and special tools. All sheet metals are galvanized and all external panels are powder coated RAL 7016 giving to the units the image and the quality like last generation of IT devices. -
Page 6: Cw" Units Hydraulic Section
Cooling components • Chilled water valve with servomotor 0-10 V Electric control board Electric control board: The electric control board is constructed and wired in accordance with Directives 73/23/EEC and 89/336/EEC and related standards. The board may be accessed through a door after the main switch has been turned off.All the remote controls use 24 V signals powered by an insulating transformer situated on the electric control board. -
Page 7: Installation Warnings
Fig. 5 Basic cooling circuit (CW version) Standard Opt. 2-way valve Pos. Description Pos. Description Chilled water inlet Coil heat exchanger Chilled water outlet Purge valve 3-way valve 2-way valve (Opt.) Plug fan Pos. Description Pos. Description Chilled water inlet Coil heat exchanger Chilled water outlet Purge valve... -
Page 8: Inspection / Transport / Positioning
General rules • When installing or servicing the unit, you must strictly follow the rules provided in this manual, comply with the directions on the units themselves and take all such precautions as are necessary. • The fluids under pressure in the cooling circuit and the presence of electrical components may cause hazardous situations during installation and maintenance work. -
Page 9: Installation
Installation The NEW DMREF R air-conditioning unit is suitable for all environments except aggressive ones. Do not place any obstacles near the units and make sure that the air flow is not impeded by obstacles and/or situations causing back suction. Fig. -
Page 10: Humidifier
Humidifier The installation of the humidifier requires the connection to the water supply and drain hoses. To simplify installation, it is recommended to use hose with an inside diameter of 6 mm and an outside diameter of 8 mm and the revolving 3/4”G connection, either straight or 90°. A shut-off tap and a mechanical filter should be installed to trap any solid impurities. - Page 11 IMPORTANT WARNING: when installation is completed, flush the supply hose for around 30 minutes by piping the water directly into the drain without sending it into the humidifier. This will eliminate any scale or processing residues that may block the fill valve or cause foam when boiling.
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Page 12: Electrical Connections
Residual chlorine mg/l Cl- Calcium sulphate mg/l CaSO Metallic impurities mg/l Solvents, diluents, soaps, lubricants mg/l Values depending on specific conductivity; in general: TDS ≅ 0.93 * σ ≅ 0.65 * σ Not lower than 200% of the chloride content in mg/l of Cl Not lower than 300% of the chloride content in mg/l of Cl Warning: no relation can be demonstrated between water hardness and conductivity. -
Page 13: Operating Diagrams
Operating Diagrams UPFLOW DOWNFLOW DISPLACEMENT Start-Up Preliminary checks • Check that the electrical connections have been made properly and that all the terminals are securely tightened. This check should also be included in a periodic six-month inspection. • Check that the voltage at the RST terminals is 400 V ± 10% •... -
Page 14: Starting Operations
Starting operations Before starting the unit, turn the main switch on, select the operating mode desired from the control panel and press the ”ON” button on the control panel. You should not disconnect the unit from the power supply during periods when it is inoperative but only when it is to be taken out of service for a prolonged period (e.g. -
Page 15: Setting Operating Parameters
Setting Operating Parameters Generalities All the control devices are set and tested in the factory before the unit is dispatched. However, after the unit has been in service for a reasonable period of time you can perform a check on the operating and safety devices. The settings are shown in Tab. -
Page 16: Maintenance
Maintenance The only operations to be performed by the user are to switch the unit on and off. All other operations are to be considered maintenance work and must thus be carried out by qualified personnel trained to do their job in accordance with current laws and regulations. - Page 17 Fig. 13 Inspecting the air filter Open the unit front panels Pull out the air filter Check the condition of the filter and replace it if necessary “Down-Flow" version “Up-Flow" version “Displacement” version •17• INNOV@-DMREF-R-IOM-0922-EN...
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Page 18: Set The Right Fan Speed
Fig. 12 Relief valves • The relief valves is accessible on frontal side as indicate in below drawing Set the right fan speed The adopted fans are of the backward curved blades type in combination with a 4 poles e-motor. This kind of fan has very high performances so that it’s speed has to be reduced in order to match to the nominal air flow with the real external pressure drops: in case of wrong selection, the air flow may exceed the limits with possible water dragging out from the coils (down flow units) or in case of DC units. - Page 19 With the basic control the control tension is set with a manual potential installed in the E-Panel. To know the tension set with the potential it is necessary to use an external tool (Voltmeter). •19• INNOV@-DMREF-R-IOM-0922-EN...
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Page 20: Troubleshooting
Troubleshooting On the next pages you will find a list of the most common reasons that may cause the package unit to fail or any malfunction. This causes are broken down according to easily identifiable symptoms. You should be extremely careful when attempting to implement any of the possible remedies suggested: overconfidence can result in injuries, even serious ones, to inexpert individuals. - Page 22 AGENCES COMMERCIALES : BELGIQUE ET LUXEMBOURG POLOGNE + 32 3 633 3045 + 32 3 633 3045 +48 22 58 48 610 +351 229 066 050 FRANCE PORTUGAL +33 1 64 76 23 23 +33 1 64 76 23 23 +351 229 066 050 +7 495 626 56 53 ALLEMAGNE...
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