INSTRUCTION MANUAL FOR: M52 3-Phase McLean Thermal 11611 Business Park Blvd. N Champlin, MN 55316 Tel: 763-323-8200 Fax: 763-576-3200 WWW.MCLE A NTH E RM A L . C OM 1 10-1008-202 rev 1 TABLE OF CONTENTS Receiving the Air Conditioner .....................................................................1 Handling and Testing the Air Conditioner...................................................1 Installation...................................................................................................2 Design Data, Model Drawing......................................................................3 Mounting Cutout Dimensions .....................................................................4 Components List.........................................................................................4 Wire Diagram..............................................................................................5 Temperature Control...................................................................................6 Principles of Operation ...............................................................................6 Maintenance...............................................................................................6 Trouble Shooting ........................................................................................8 McLean Thermal Warranty .......................................................................10 NOTE: Some of the information in this manual may not apply if a special unit was ordered. If additional drawings for a special unit are necessary, they have been inserted. Contact McLean Thermal if further information is required. RECEIVING THE AIR CONDITIONER Inspect the air conditioner. Check for concealed damage that may have occurred during shipment. Look for dents, scratches, loose assemblies, evidence of oil, etc. Damage evident upon receipt should be noted on the freight bill. Damage should be brought to the attention of the delivering carrier -- NOT to McLean Thermal -- within 15 days of delivery. Save the packing material and request an inspection. Then file a claim with the delivering carrier. McLean Thermal cannot accept responsibility for freight damages however, we will assist you in any way possible. HANDLING & TESTING THE AIR CONDITIONER If it is necessary to place the air conditioner in a horizontal position after unpacking, be certain it is placed in an upright, vertical or mounting position for a minimum of five (5) minutes before operating. Never attempt to operate the air conditioner while it is horizontal or on its side, back or front. The refrigeration compressor is filled with lubricating oil. Running the compressor without oil in the lower part of the housing will cause permanent damage to the air conditioner. This also voids the warranty. TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE. Refer to nameplate for proper electrical current requirements, then wire unit to a properly grounded power supply. Minimum circuit ampacity should be at least 125% of the amperage shown in the design data section for the appropriate model. No other equipment should be connected to this circuit to prevent overloading. Immediately after applying power the evaporator blower (enclosure air) should start running. Operate the air conditioner with the compressor running for five (5) to ten (10) minutes. Condenser air temperatures should be warmer than normal room temperatures within a few minutes after the condenser air blower starts. 1 10-1008-202 rev 1