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Summary of Contents for Aprilaire 1952
- Page 1 Ultraviolet Germicidal Lamps Model 1952 24” Rooftop Unit Model 1953 32” Rooftop Unit Model 1972 Rooftop Unit, Internal Mount Safety, Installation and Service Manual Models 1952, 1953 & 1972 READ AND SAVE THIS MANUAL...
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Page 2: Table Of Contents
Installation of External Mount Rooftop Units (Models 1952 & 1953) ......4 Installation of Internal Mount Rooftop Units (Model 1972) . -
Page 3: Application
II. APPLICATION Models 1952, 1953, and 1972 Aprilaire Ultraviolet Germicidal Lamps are designed for the treatment of evaporator coils used in rooftop HVAC 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 drain pans and prevent further growth. -
Page 4: Installation Of External Mount Rooftop Units (Models 1952 & 1953)
INSTALLATION OF EXTERNAL MOUNT ROOFTOP UNITS (MODELS 1952 & 1953) FIGURE 1 – Model 1952/1953 Lamp Unit Base DETERMINE MOUNTING LOCATION Determine a mounting location for the lamp. Use the criteria below to select a proper location: 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. -
Page 5: Make Electrical Connections
5. Shield non-metallic components (such as electrical wires and fan belts) that receive direct or reflected UV radiation with aluminum tape, sheet metal, or conduit. FIGURE 3 – Model 1952/1953 Wiring Diagram Lamp Socket Interlock switches (not provided) -
Page 6: Install Lamp
Finally, return the Lamp Retaining Bracket onto the threaded stud of the Unit Base, securing with the washer and wing nut provided. (Note: the Lamp Retaining Bracket butts up against, but not onto, the Lamp Base.) FIGURE 4 – Model 1952/1953 Lamp Installation Keyhole Slot Lamp Base 3. -
Page 7: Installation Of Internal Mount Rooftop Units (Model 1972)
CHECK LAMP OPERATION The preferred method for checking lamp operation is to measure the current draw of the lamp using a clamp-on ammeter. To detect the low current of the UV lamp, the ammeter must be capable of measuring 100 mA and above. To prevent accidental exposure to harmful UV germicidal light during this procedure, the location where the amperage measurement is taken must be in a separate compartment from where the UV lamp is installed. - Page 8 (or section thereof) being illuminated. Note that a Model 1972 Internal Mount Unit can be installed in conjunction with a Model 1952/1953 External Mount Unit as shown. b. Install lamp in location that prevents exposure of plastics, rubber, paper, and other non-metallic materials to UV light, or shield such materials with aluminum tape, sheet metal, or metal conduit.
- Page 9 MAKE ELECTRICAL CONNECTIONS 1. Verify power to the HVAC equipment is shut off. Determine where the power for the unit will come from. The units can use any voltage from 120 VAC up to 277 VAC (single phase), 60 Hz. The ballast automatically adjusts to whatever voltage is supplied in that range.
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Page 10: Annual Lamp Replacement
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;... -
Page 11: Lamp Disposal
Model 1952 Replacement Lamp Model 1953 Replacement Lamp Model 1972 Replacement Lamp VII. LAMP REPLACEMENT RECORD Date Dealer Name Multi-Voltage High Output Ballast (for 1952, 1953, and 1972) Fuse (3 Amp, slow burn) Fuse Cap Lamp Socket Date #4466 #4412... -
Page 12: Limited Warranty
VIII. LIMITED WARRANTY Your Research Products Corporation Aprilaire Ultraviolet Germicidal Lamp Model 1952, 1953 or 1972 is expressly warranted for three (3) years from the date of installation to be free from defects. However the replaceable lamp is expressly warranted for only one (1) year from the date of installation to be free of defects.
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