® PELCO ® EH4712DB/ EH4718DB Series Environmental Enclosures Installation/ Operation Manual C1446M-B (7/98) Pelco • 3500 Pelco Way, Clovis • CA 93612-5699 USA • www.pelco.
CONTENTS Section Page 1.0 GENERAL .................................................................................................. 3 1.1 IMPORTANT SAFEGUARDS AND WARNINGS ............................... 3 2.0 DESCRIPTION .......................................................................................... 4 2.1 MODELS ............................................................................................ 4 2.2 CERTIFICATIONS ....................................................................
1.0 GENERAL 1.1 IMPORTANT SAFEGUARDS AND WARNINGS Prior to installation and use of this product, the following WARNINGS should be observed. 1. Installation and servicing should only be done by qualified service personnel and conform to all local codes. 2. Unless the unit is specifically marked as a NEMA Type 3, 3R, 3S, 4, 4X, 6, or 6P enclosure, it is designed for indoor use only and it must not be installed where exposed to rain and moisture. 3. Only use replacement parts recommended by Pelco. 4.
2.0 DESCRIPTION The EH4712DB and EH4718DB environmental enclosures are constructed of aluminum. The enclosures are installed by attaching the top of the unit to a mounting surface. A door in the bottom drops open for access during installation or to make camera/lens adjustments. You can install cameras with either fixed focal length lenses or motorized zoom lenses. All models have an adjustable camera sled to accommodate different sizes of cameras and lenses. 2.
3.0 INSTALLATION 3.1 ENCLOSURE MOUNTING 1. Place the enclosure on a flat surface with the bottom facing up. Open the door. 2. Remove the camera sled from the rail (refer to Figure 1 for the location of the camera sled): 3. a. Loosen the screws. b. Slide the sled so that the screws are in the large part of the mounting holes. c. Remove the sled. d. Remove the parts tied to the sled.
SCREW (2) ENCLOSURE LID CAMERA SLED ENCLOSURE BODY FOAM FILTER VENT GRILL VENT COVER PLATE WASHER (2) SCREW (2) Figure 1.
10. Two vent cover plates with gaskets affixed come attached to the camera sled as loose equipment. Locate them for use in the following steps. On the bottom of the enclosure, remove two screws and washers that attach the vent grill and foam filter to the front of the enclosure. Using the same screws and washers, attach a vent cover plate and gasket to the front of the enclosure. 11.
DIFFERENT POWER REQUIREMENTS 1. Bring in wires for AC high and AC neutral for the camera. If you are using 24 VAC, refer to Table A to determine the size of wire to use. 2. Refer to Figure 2 and connect the wires as follows: a. Connect AC high to connector 9 of the 10-connector INPUTS terminal block. b. Connect AC neutral to the connector 10 of the 10-connector INPUTS terminal block. 3. Add up the wattages of the enclosure’s accessories. Refer to Table B for wattages of the accessories. 4.
Figure 2.
Table A. 24 VAC Wiring Distances The following are the recommended maximum distances for 24 VAC applications and are calculated with a 10-percent voltage drop. (10-percent is generally the maximum allowable voltage drop for AC-powered devices.) EXAMPLE: An enclosure that Wire Gauge requires 80 vA and is installed 35 feet (10 m) from the transformer would require a minimum wire gauge of 20 Awg.
Models with Heater-Blower (-1/-2/-3) - Refer to Figure 2 and wire the motorized zoom lens control as follows: a. Connect or wire the lens control from the camera to the LENS or LENS CONTROL connector on the circuit board. b.
4.0 OPERATION Models with Heater-Blower (-1/-2/-3) Only - The fan thermostat on the circuit board is set to turn on the fan between 77° and 93°F (25° and 34°C) and to turn off the fan between 62° and 78°F (17° and 26°C). The heater/defroster thermostat on the circuit board is set to turn on the heaters (and defroster, if installed) between 42° and 58°F (6° and 14°C) and to turn off the heaters (and defroster, if installed) between 72° and 88°F (22° and 31°C).
5.0 MAINTENANCE Perform the following maintenance at regularly scheduled intervals to prolong the operational life and appearance of the equipment. 1. Clean the window with a mild nonabrasive detergent in water and a soft cloth to maintain picture clarity. 2. If your enclosure has a blower, clean the foam filter (if installed) as follows: On the bottom front of the enclosure, remove the two screws and washers in the vent grill. Remove the vent grill and take out the filter.
6.
GENERAL Environment: Indoor/outdoor -10° to 120°F (-23° to 49°C) Can be modified for use in a marine or high-moisture environment. (Design and product specifications subject to change without notice.) A EH4712DB EH4718DB A 7.25 (18.42) 9.25 (23.50) B 16.2 (41.15) 21.2 (53.84) C 13.3 (33.78) 18.3 (46.48) 2.00 (5.08) 1/4-20 B 3.50 5.00 (8.89) (12.70) 4.00 (10.16) 6.87 (17.
7.0 WARRANTY AND RETURN INFORMATION WARRANTY Pelco will repair or replace, without charge, any merchandise proved defective in material or workmanship for a period of one year after the date of shipment. Exceptions to this warranty are as noted below: • Five years on FT/FR8000 Series fiber optic products. • Three years on Genex® Series products (multiplexers, server, and keyboard).
