Assessments - 5, GPA: 3.6
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Facilidade de uso
Section II of this instruction describes the installation of the electric duct heater package with other than the Model 516 air handlers . SECTION I The electric duct heater is designed to be used with the Models 18- and 24-516 Fan Coil Units. Refer to Table I, Ratings and Capacities, for sizes and power inputs. Refer also to the Dimensional Drawing. The package, as shipped from the factory, contains heater coils, a rating plate, a sequencing relay (for 11- through 14.4-KW size units), automatic temperature control, and a manual temperature control switch. Each heater has both sides of the power line broken by a main contactor and a backup contactor, and has an open set of contacts for fan control. Before Starting Installation: 1. Check local codes and ordinances for additional requirements. 2. Check the incoming power supply to be sure that the rated voltage, frequency, and phase correspond to that stamped on the unit ratirig plate. 3 . Check the building power supply to be sure that it is sufficient to handle the additional electrical load imposed by this equipment. Installing the Electric Duct Heater Package The duct heater package is designed for zero clearance from combustible material. There must be a 7 -1 /2 inch clearance in front of the control box cover. A collar for mounting the duct heater is provided with each Fan Coil Unit. Use this collar I 39516D3 5/1/69 if the heater is to be installed within 6 inches downstream from the Fan Coil. Mount the collar on the duct flanges of the Fan Coil so that the opening for the duct heater is on the same side of the Fan Coil as the coil connections and rating plate. Make certain that the flange is at the bottom of the duct heater opening. This will insure that the heater is placed at the correct depth. Now, place the heater into the collar and attach it to the collar with four sheet metal screws. If the application does not provide adequate space for the duct heater to be installed 6 inches from the Fan Coil, then the duct heater must be installed 48 inches downstream from the Fajj-Coil Unit. To install the he, from the Fan Co hole in the side heater into place template, drill four_moun the heater with An air filter mi airstream. es .downstream 8 inch de the tox as a attach crews. return TOP VIEW SIDE VIEW 10 D -15i Electric Duct Heater Dimensional Drawing TABLE I - RATINGS AND CAPACITIES Package P/N KW Rating * Capacity Btuh Field Wire Connections No. of Circuits Minimum Wire Size AWG - 90° C - Copper Max Fuse Size Amps 208 V 230V 240V 65901D03 3 7,690 9,403 10,239 1 12 (2) 20 65901D04 4 10,254 12,538 13,652 1 10 (2) 20 65901D05 5 12,817 15,672 17,065 1 10 (2) 30 65901D06 6 15,381 18,807 20,478 1 10 (2)40 65901D07 7 17,944 21,941 23,891 1 8 (2) 50 65901D08 8 20,508 25,076 27,304 1 8 (2) 50 65901D09 9 23,071 28,210 30,717 1 6 (2) 60 65901D010 9.6 24,610 30,091 32,764 1 6 (2) 60 65901D011 11 28,199 34,479 37,543 2 10 ** (2) 30 10 (2) 40 65901D012 12 30,762 37,614 40,956 2 10 ** (2) 30 8 (2) 50 65901D013 13 33,326 40,748 44,369 2 10 ** (2) 30 8 (2) 50 65901D014 14 35,889 43,883 47,782 2 10 ** (2) 30 8 (2) 50 659Q1D015 14.4 36,915 45,136 49,147 2 10 ** (2) 30 8 - (2) 50 * Rated at 240V, 60 cycle, single phase ** Includes blower motor and one heating element 39516D3 . 2 . Limitations and Recommendations 1. The duct heaters should never be installed from the bottom or the top of the duct - only from the sides of the duct. The heaters must always be installed on the discharge side of the Fan Coil. 2. Only one duct heater may be used in any one duct. If the capacity required exceeds the output of one duct heater, select the total number of heaters and proportion them in separate runouts or separate ducts from the plenum. 3. Install the duct heater at least 18 inches away from any canvas duct connector. If the heater must be located closer, replace the canvas connector with an asbestos connector. 4 . The control enclosures of the duct heaters must be completely accessible and so located as to provide ventilation at all times. 5. The air duct should be installed in ac -cordance with the standards of the National Board of Fire Underwriters for the Installation of Air Conditioning and Ventilating Systems of other than Resident Type (pamphlet no. 90A), and Resident-Type Warm Air Heating and Air Conditioning Systems (pamphlet no. 90B). 6. Each duct heater should be provided with a fan relay. The heater and fan motor are to be wired so that the duct heater cannot operate unless the fan is on. Always hook the fan interlock to the high-voltage side of the system. Never use a fan delay with the electric duct heater. 7. The coil of the secondary contactor (general-purpose, continuous duty rated at 6000 cycles) must be wired in series with the manual reset limit control (TMR). NOTE: Observe at least one complete heating cycle before leaving the installation. Table II - Air D...