FLUID COIL INSTALLATION OPERATION AND MAINTENANCE Commercial Products PO Box 1457 / 1000 Heatcraft Drive, Grenada, MS 38902-1457 Tel: 800-225-4328 / 662-229-4000 Fax: 662-229-4212 Email: coils@heatcraft.com Web Site: www.heatcraft.
FLUID IOM Guidelines for the installation, operation and maintenance of Heatcraft’s cooling and heating coils have been provided to help insure the proper performance of the coils and their longevity. These are general guidelines that may have to be tailored to meet the specific requirements of any one job. As always, the installation and maintenance of any coil should be performed by a qualified party or individual.
FLUID IOM Mounting Horizontal Air Flow Horizontal Tubes Level with the y-axis and x-axis. Vertical Air Flow Horizontal Tubes Level with the z-axis and x-axis. Horizontal Air Flow Vertical Tubes Level with the y-axis and x-axis. 2 Y X Z 1. All Heatcraft water and glycol coils are designed to be fully drainable when properly mounted. 2. Vertical air-flow is not recommended for dehumidifying coils.
FLUID IOM Cleanable Fluid Coils Heatcraft also offers cleanable fluid coils for applications where mechanical cleaning of the internal surface of the tubes are required. Our cleanable coils utilize a box-style head in lieu of cylindrical headers. The head contains baffles for circuiting and is removable for easy access to coil tubes. Type “P” coils are cleanable from the supply end of the coil. Type “Q” coils are cleanable from the end opposite the supply.
FLUID IOM 6. Proper clearance should be maintained between the coil and other structures such as the fan, filter racks, transition areas, etc.. 7. Once installed, the coil should be pressurized to 100 psig with dry nitrogen or other suitable gas. The coil should be left pressurized for a minimum of 10 minutes. If the coil holds the pressure, the hook-up can be considered leak free. If the pressure drops by 5 psig or less re-pressurize the coil and wait another 10 minutes.
FLUID IOM Return Air Air Supply Figure 2 - Coil Diagram Su pp ly Air Vent Side Vent Gate Plug Valve Re tur n Air Flow Tee Dirt Leg Cap Side Drain Plug Union Drain Valve Figure 3 - Vertical Airflow Diagram Operation Initial Start-Up 1. Open all air vents so that air is eliminated from within the coil circuitry and headers. Verify that all vents and drains are not obstructed and do discharge a stream of water. 2. Fill the coil with water then close all vents. 3.
FLUID IOM General 1. Proper air distribution is vital to coil performance. Air flow anywhere on the coil face should not vary by more than 20%. 2. The drain pan and associated piping (drain line and trap) should be installed so that there is no standing water in the drain pan and that no blow-through occurs. 3. Fluid and air velocities should be maintained within Heatcraft’s recommended values.
FLUID IOM a. Nuts and weld studs should be coated with thread lubricant. b. Tighten all nuts per Figure 4 - Torque Pattern, to 35 ft-lb torque. After the initial torque has been applied retorque them to 50 ft-lb, again using the pattern shown in Figure 4. The permissible range of final torque values are as follows: maximum torque: 53 ft-lb design torque: 50 ft-lb minimum torque: 47 ft-lb c. Pressure test coils per the installation instructions. d.
FLUID IOM of the electrical components of the blower. Failure to do so may result in damage to the equipment and serious injury. 4. Close the vent or drain plug on the header which the blower is connected and open the drain valve or cap on the other header. 5. Operate the blower for 45 minutes and then check the coil to see if it is dry. A mirror placed in the discharge will become fogged if moisture is present. Repeat this procedure until the coil is dry. 6.
FLUID IOM 4. Drain the coil by opening all drain valves and/or the drain plug. Remove the vent plug to aid the draining process. 5. Close the drain valve(s) and drain plug. 6. Connect the flushing system to the coil. A typical system is shown in Figure 5 - Flushing System Diagram. 7. With the throttling valve closed, start the pump and operate until the air is vented from the coil. Next, close the air vent. 8. Open the throttling valve about half-way and circulate the fluid through the coil for 15 minutes.
Commercial Products WARRANTY The Heat Transfer Division of Heatcraft Inc., hereinafter referred to as the “Company”, warrants that it will provide free suitable repair or replacement of coils in the event any coil of its manufacture used in the United States proves defective in material or workmanship within twelve (12) months from the date shipped by the Company. THIS WARRANTY CONSTITUTES THE BUYER’S SOLE REMEDY. IT IS GIVEN IN LIEU OF ALL OTHER WARRANTIES.
