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Aprilaire 1952 manual

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Table of contents for the manual

  • Page 1

    Safety , Installation and Ser vice Manual Models 1 952 , 1 953 & 1 972 Ultraviolet Germicidal Lamps READ AND SA VE THIS MANUAL Model 1952 24” Rooftop Unit Model 1953 32” Rooftop Unit Model 1972 Rooftop Unit, Internal Mount[...]

  • Page 2

    2 I. SAFETY INSTRUCTIONS WARNING Ultraviolet light is harmful to eyes and skin. Never look at light produced by this lamp. Shut off power to lamp before servicing. Electrical shock from 120 - 277 V AC may cause serious injury . Shut off power before starting installation and do not turn power back on until complete. Sharp edges may cause personal i[...]

  • Page 3

    3 II. APPLICA TION Models 1952, 1953, and 1972 Aprilaire Ultraviolet Germicidal Lamps are designed for the treatment of evaporator coils used in rooftop HV AC air handling units or in larger split systems used in the light commercial market. The UV germicidal light emitted from the lamps will kill microorganisms growing on evaporator coils and drai[...]

  • Page 4

    4 INST ALLA TION OF EXTERNAL MOUNT ROOFTOP UNITS (MODELS 1952 & 1953) a. The lamps are intended for evaporator coil treatment. See Figure 2 for typical installation. If a single Lamp cannot illuminate the majority of the evaporator coil, two or more units might be required as shown. T o the extent possible, the Lamp(s) should be centered on the[...]

  • Page 5

    5 INST ALL THE UNIT BASE 1. Using the Unit Base as a guide, mark the locations for the lamp and mounting holes on the rooftop unit cabinet. 2. Carefully inspect the inside of the rooftop unit and make sure that no damage to any components will occur as a result of drilling the holes. 3. Drill hole for the lamp using a 2 in. hole cutter . At the mou[...]

  • Page 6

    6 INST ALL LAMP 1. Remove Lamp from shipping tube. Use ceramic ends of Lamp when handling – do not touch the glass tube of Lamp. Use alcohol to remove any dirt and/or fingerprints from the Lamp. 2. Referring to Figure 4, follow the steps below to install Lamp: a. First, with the Lamp Retaining Bracket removed, slide the Lamp into the large side o[...]

  • Page 7

    7 INST ALLA TION OF INTERNAL MOUNT ROOFTOP UNITS (MODEL 1972) Wiring Access Cover Mounting Brackets Lamp Socket Lamp FIGURE 5 – Model 1 972 90-744 CHECK LAMP OPERA TION The preferred method for checking lamp operation is to measure the current draw of the lamp using a clamp-on ammeter . T o detect the low current of the UV lamp, the ammeter must [...]

  • Page 8

    8 a. The lamps are intended for evaporator coil treatment. See Figure 6 for typical installations. If a single Lamp cannot illuminate the majority of the evaporator coil, two or more units might be required. T o the extent possible, the Lamp(s) should be centered on the coil (or section thereof) being illuminated. Note that a Model 1972 Internal Mo[...]

  • Page 9

    9 3A Fuse Ground Y ellow (2) NO T USED Ballast Lamp Sock et Red (2) Blue (2) White Black Green Green Black 120V AC to 277V AC P ower Source White Interlock switches (not provided) recommended for all access panel doors FIGURE 7 – Model 1972 Wiring Diagram 90-754 INST ALL LAMP 1. Remove Lamp from shipping tube. Use ceramic ends of Lamp when handli[...]

  • Page 10

    10 IV . ANNUAL LAMP REPLACEMENT The Aprilaire Ultraviolet Germicidal Lamp is designed for the lamp to be on at all times. After 9,000 hours of operation – 1 year of constant use – the effectiveness of the lamp inside the unit diminishes and needs to be replaced. Rarely will a lamp burn out in one year of continuous use; replacement is necessary[...]

  • Page 11

    11 VI. TROUBLESHOOTING If the Lamp does not operate, check the following: 1. Electrical Connections – Verify that the Lamp has been wired correctly . The power to lamp must be always ‘on’ during normal operation. On External Mount Units, verify that safety switch inside the cover of Unit Base has not been damaged. The voltage into the units s[...]

  • Page 12

    B2203283 1015 E. W ASHINGT ON A VE. • MADISON, WI 53703 • PHONE: 888/782-8638 • F AX: 608/257-4357 • www .aprilairecontractor .com VIII. LIMITED WARRANTY Y our Research Products Corporation Aprilaire Ultraviolet Germicidal Lamp Model 1952, 1953 or 1972 is expressly warranted for th ree (3) years from the date of installation to be free from[...]