User manual TOSHIBA VN250-SE SERVICE MANUAL

[. . . ] A02-012 Revised on : 2005/Feb. /15 SERVICE MANUAL HEAT EXCHANGE VENTILATORS VN-250SE VN-350SE VN-500SE VN-800SE VN-1KSAE VN-500SE PRINTED IN JAPAN, Jan. , 2003 ToMo CONTENTS 1. SAFETY CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TECHNICAL POINTS (PERFORMANCE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REFERENCE DRAWING FOR INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Maintenance Method In order to prevent the reduced effectiveness of your Heat Exchange Ventilators, be sure to clean dirt and dust from the filter and Heat Exchanger at regular intervals. CAUTION Be sure to turn the power off, and to keep the exclusive breaker off before carrying out maintenance activities. Switch Do not immerse the filter or other resin components in water 60°C or above. Never use water on the motor, the switch, or the Heat Exchanger. Turn off Motor Wa t or aer 60° bov C e Switch Heat Exchange Element Do not use the following items for cleaning. Avoid using heat to dry the filter, as it may cause changes in shape or quality. Always be sure to use a filter. Failure to do so may cause dust and dirt to build up on the Heat Exchanger, lowering its efficiency and rendering it inoperable. Gasoline Filter Thinner Metal brush Benzene ­ 14 ­ 7-4. Model VN-250SE/VN-350SE/VN-500SE · Stop the operation and keep the exclusive breaker "OFF". · Cleaning the filter (When required) 1) Enter the ceiling from the Inspection Opening for the Heat Exchange Ventilators, and remove the screw on the inspection cover. 2) Holding the Inspection Cover, turn two pieces of knob for 90° and remove the cover. 3) There is a filter below the Heat Exchanger at two places, respectively. 4) Either lightly strike the removed filter with your hand or vacuum it with a vacuum cleaner to remove the dirt. If it is very dirty, swish it back and forth in a solution of lukewarm water and dish-washing (neutral) detergent. 5) Install the filter after thoroughly allowing it to dry naturally. Hook Inspection Cover Hook Inspection Cover CAUTION Avoid using heat to dry the filter, as this may cause changes in the shape or quality of the filter. · Whenever the filter was damaged, order the sales shop or the engineering office. (Separately sold) · Cleaning the Heat Exchanger. (If you find it too much stained, clean it. ) 1) Remove the filters. 2) Remove the two Heat Exchanger from the unit. (Model VN-250SE has one Heat Exchange. ) Knob Position When installed (Closed) To remove (Open) CAUTION · The weight of the Heat Exchanger is as shown in the table below. Hold it firmly to ensure that you do not drop it. Model VN-250SE VN-350SE VN-500SE Weight (kg/piece) 4. 5 3. 4 3. 7 Pieces to be used 1 2 2 Filter Heat Exchanger ­ 15 ­ 3) Use a vacuum cleaner to remove dust and dirt from the element's surface. CAUTION · Use a brush attachment on the vacuum cleaner nozzle. Avoid using a hard nozzle as it may disfigure the heat exchange foils. · Never use water to clean the Heat Exchanger. · Whenever the Heat Exchanger was damaged, order the sales shop or the engineering office. (Separately sold) 4) When cleaning is completed, return the Heat Exchanger and filter to their former positions, and close the Inspection cover and tighten the screw. Nozzle Mark CAUTION · Make absolutely sure to install the filter with an indication of " " turned to wart the Heat Exchanger side. Failure to do so will lead to clogging of the Heat Exchanger foils and reduced performance. · Insert the heat exchanger right side up, with the label marked ñ facing toward you. ­ 16 ­ 7-4-2. [. . . ] Q & A FOR HEAT EXCHANGE VENTILATORS (Users are responsible for the following contents. ) Question u Fan does not operate. Answer · Is the electric wiring securely performed? For this model, the terminal block for connection of cables is provided to the side of the main unit. The connecting works between the power supply and the switch and between the switch and the main unit are performed by the special dealers. Incorrect cabling from the specified switch and the switches disables to adjust the air volume. [. . . ]