INSTALLATION INSTRUCTIONS ECONOMIZERS WITH EXHAUST Model EIFM-5C For Use with Bard 3-1/2 through 6 Ton Wall Mount Air Conditioners and Heat Pumps Bard Manufacturing Company Bryan, Ohio 43506 Since 1914...moving ahead just as planned.
CONTENTS GENERAL General Information ................................................. 1 Unpacking ................................................................ 1 Description ............................................................... 1 INSTALLATION Basic Installation ...................................................... 2 Economizer – WA, WL & WH Series ...................... 7 FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 ................................................
GENERAL GENERAL INFORMATION DESCRIPTION The economizer should only be installed by a trained heating and air conditioning technician. These instructions serve as a guide to the technician installing the economizer package. They are not intended as a step by step procedure with which the mechanically inclined owner can install the package.
INSTALLATION BASIC INSTALLATION 1. Unpack the economizer assembly which includes the integral economizer with attached electrical harness, mixed air thermistor, miscellaneous hardware and installation instructions. 2. Remove and save the existing exterior blower access and service access panels on the Bard wall mount unit. (See Figure 1.) 3. Remove and save existing unit return air filter and center screw in front grille. (See Figure 1.) 4. Remove and discard the exhaust cover plate. (See Figure 1.
IMPORTANT: Position front lip of economizer on top of front grille and condenser partition (See Figure 2 inset.) This is important to ensure proper drainage of any water entering damper assembly. LEFT HAND UNITS – Slide the economizer to the left until it is tight against the back of the corner panel. 6. Mount mixed air thermistor to blower partition with screws provided. Bracket with sensor installs on top of blower partition and screws are installed from the underside.
FIGURE 3 MIS-1356 Manual 2100-447 Page 4
Manual 2100-447 Page 5 FIGURE 4 TOP VIEW OF CONTROL PANEL MIS-350 MIS-350
10. Connect leads with fork terminal to corresponding points on terminal strip. RE: C.Y.G. (See wiring diagram.) 11. Wire nut leads with 5/8" stripped ends to Y1 and Y2 leads from thermostat. See wiring diagram in this manual. NOTE: Wires referenced in note one on wiring diagram are for special control application only and are not normally used in conjunction with other circuitry to open the damper regardless of outside temperature and humidity. Consult factory for details. 12. Close control panel cover 13.
F. Readjust temperature on the thermostat to engage the second stage of cooling (Y2). The damper motor should return to previously set minimum position. Compressor motor should start. G. Switch thermostat to OFF fan and OFF heat/ cool positions to de-energize unit. Economizer damper should return to full closed (100 percent return air) position. Checkout is complete. 16. Replace control access panel and mist eliminator. 17.
CONDITION B – WARM OUTDOORS First stage cooling cycles the compressor and dampers remain in mechanical cooling mode.
FIGURE 7 ECONOMIZER OPERATION FOR SINGLE COMPRESSOR UNIT MIS-1351 WALL THERMOSTATS FOR HEAT PUMPS WITH ECONOMIZER Thermostat Part 8403-027 (White Rodgers IF92-71) Electronic Heat Pump Thermostat 2 Stage Cool / 3 Stage Heat FOR AIR CONDITIONING WITH ECONOMIZER Thermostat Part 8403-021 (Honeywell T874D1934) Subbase Part 8404-012 (Honeywell Q674A1001) 2 Stage Cool / 2 Stage Heat Manual 2100-447 Page 9
Manual 2100-447 Page 10
