INSTALLATION INSTRUCTIONS ECONOMIZERS WITH EXHAUST Models EIFM-3C For Use with Bard 2-1/2 through 3 Ton Wall Mount Air Conditioners and Heat Pumps Produced in 2005 and Later Bard Manufacturing Company, Inc. Bryan, Ohio 43506 Since 1914...Moving ahead, just as planned.
CONTENTS GENERAL General Information ................................................. 3 Unpacking ................................................................ 3 Description ............................................................... 3 INSTALLATION Basic Installation ............................................ 4 – 7, 9 Economizers – WA, WL & WH Series .................. 10 Wall Thermostats ...................................................
GENERAL GENERAL INFORMATION 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. The economizer housing is shipped in one carton which contains the electrical harness, miscellaneous hardware and installation instructions.
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.) WARNING Open and lock unit disconnect switch before installing this accessory to prevent injury or death due to electrical shock or contact with moving parts.
3. RIGHT HAND UNITS Remove and save existing unit return air filter and left side filter support bracket. Remove and save top four (4) screws from grille. (See Figure 2.) 4. Remove and discard the condenser partition blank off plate. (See Figure 2.) LEFT HAND UNITS Remove and save the existing unit return air filter and right side filter bracket.
5. FOR RIGHT HAND UNITS Install economizer by inserting the economizer into the unit to the far left side clearing the right filter bracket. Once the economizer is fully inserted, slide the economizer to the right until it is tight against the back of the control panel. (See Figure 3.) FIGURE 3 TOP VIEW OF BLOWER PARTITION SIDE SECTION Manual 2100-449A Page 6 of 13 FOR LEFT HAND UNITS Install economizer by inserting the economizer into the unit to the far right side clearing the left filter bracket.
IMPORTANT: Position front lip of economizer under front grille and on top of condenser partition. (See Figure 3 inset.) This is important to ensure proper drainage of any water entering damper assembly. 6. Mount mixed air thermistor to blower partition as shown with screws provided. Bracket with sensor installs on top of blower partition. Screws are inserted from the underside. Route wires as shown and secure with wire tie. Connect wires to thermistor. (See Figures 2 & 3.) 7.
Manual 2100-449A Page 8 of 13 FIGURE 5 TOP VIEW OF CONTROL PANEL
5. Mark correct setting on dial of minimum position potentiometer for future reference. D. Adjust the enthalpy control to position A, B, C, or D to achieve the maximum combination of temperature and humidity acceptable for the installation as per Table 2 below. The suggested setting is between A & B 70° DB @ 55 percent RH. Further recommendation is to always set the control at C or above. (See Figure 5.) E. Switch the thermostat fan control to automatic, and position the heat cool switch to cool.
ECONOMIZER – WA, WL & WH SERIES FEATURES • One piece construction – easy to install with no mechanical linkage adjustment required. • Exhaust air damper – built in with positive closed position. Provides exhaust air capability to prevent pressurization of tight buildings. • Actuator motor – 24 volt, power open, spring return with built in torque limiting switch.
CONDITION B – WARM OUTDOORS First stage cooling cycles and compressor and dampers remain in mechanical cooling mode.
FIGURE 8 ECONOMIZER OPERATION FOR SINGLE COMPRESSOR UNIT WALL THERMOSTATS FOR HEAT PUMPS WITH ECONOMIZER Thermostat Part 8403-060 Programmable or NonProgrammable Multi-Stage Heat/Cool & Heat Pump Thermostat. Automatic or Manual Changeover (Digital Electronic). 3 Stage Cool / 3 Stage Heat Manual 2100-449A Page 12 of 13 FOR AIR CONDITIONING WITH ECONOMIZER Thermostat Part 8403-060 or 8403-058. 8403-058 Configurable Multi-Stage Heat/Cool or Heat Pump Thermostat.
Manual 2100-449A Page 13 of 13
