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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. Manual : 2100-449A
Supersedes: 2100-449
Bryan, Ohio 43506
File: Volume III Tab 19
Since 1914...Moving ahead, just as planned.
Date: 03-14-08
Manual 2100-449A
© Copyright 2004
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CONTENTS FIGURES GENERAL General Information ................................................. 3 Figure 1 ................................................................ 4 Unpacking................................................................ 3 Figure 2 ................................................................ 5 Description............................................................... 3 Figure 3 ................................................................ 6 Figure 4 .............
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GENERAL Inspect the carton housing of each economizer as it is GENERAL INFORMATION received, and before signing the freight bill, verify that The economizer should only be installed by a trained all items have been received and that there is no visible heating and air conditioning technician. These damage. Note any shortages or damage on all copies of instructions serve as a guide to the technician installing the freight bill. The receiving party must contact the last the economizer package.
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INSTALLATION BASIC INSTALLATION 1. Unpack the economizer assembly which includes 2. Remove and save the existing exterior blower the integral economizer with attached electrical access and service access panels on the Bard wall harness, mixed air thermistor, miscellaneous mount unit. (See Figure 1.) hardware and installation instructions. WARNING Open and lock unit disconnect switch before installing this accessory to prevent injury or death due to electrical shock or contact with movi
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3. RIGHT HAND UNITS Remove and save existing 4. Remove and discard the condenser partition blank unit return air filter and left side filter support off plate. (See Figure 2.) bracket. Remove and save top four (4) screws from grille. (See Figure 2.) LEFT HAND UNITS Remove and save the existing unit return air filter and right side filter bracket. FIGURE 2 Manual 2100-449A Page 5 of 13
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FOR LEFT HAND UNITS Install economizer by 5. FOR RIGHT HAND UNITS Install economizer by inserting the economizer into the unit to the far inserting the economizer into the unit to the far right side clearing the left filter bracket. Once the left side clearing the right filter bracket. Once the economizer is fully inserted, slide the economizer to economizer is fully inserted, slide the economizer to the left unit it is tight against the back of the the right until it is tight against the
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7. Open unit control panel to gain access to unit low IMPORTANT: Position front lip of economizer under voltage terminal block. front grille and on top of condenser partition. (See Figure 3 inset.) This is important to ensure proper 8. FOR LEFT HAND UNITS Reroute economizer drainage of any water entering damper assembly. wiring harness to the left side. (See Figure 4.) 6. Mount mixed air thermistor to blower partition as 9. Route electrical harness leads through the 7/8" shown with scre
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Manual 2100-449A Page 8 of 13 FIGURE 5 TOP VIEW OF CONTROL PANEL
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9. Connect lead with fork terminal to corresponding 5. Mark correct setting on dial of points on terminal strip. Re.: C.Y.G. (See wiring minimum position potentiometer diagram.) for future reference. 10. Wire nut leads with 5/8" stripped ends to Y1 and D. Adjust the enthalpy control to position A, B, C, Y2 leads from thermostat. See wiring diagram in or D to achieve the maximum combination of this manual or on economizer. temperature and humidity acceptable for the installation as per Table 2 b
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ECONOMIZER SEQUENCE OF OPERATION ECONOMIZER – WA, WL & WH SERIES CONDITION A – COOL OUTDOORS FEATURES First stage cooling closes and powers the economizer • One piece construction – easy to install with no dampers to economizer mode and the indoor blower mechanical linkage adjustment required. starts. Mixed Air Sensor senses a mixture of return air • Exhaust air damper – built in with positive closed and outdoor air and modulates the dampers accordingly. position. Provides exhaust air capab
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CONDITION B – WARM OUTDOORS First stage cooling cycles and compressor and dampers remain in mechanical cooling mode. FIGURE 7 MECHANICAL COOLING OPERATION Manual 2100-449A Page 11 of 13
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FIGURE 8 ECONOMIZER OPERATION FOR SINGLE COMPRESSOR UNIT WALL THERMOSTATS FOR AIR CONDITIONING WITH ECONOMIZER FOR HEAT PUMPS WITH ECONOMIZER Thermostat Part 8403-060 or 8403-058. Thermostat Part 8403-060 Programmable or Non- 8403-058 Configurable Multi-Stage Heat/Cool or Heat Programmable Multi-Stage Heat/Cool & Heat Pump Pump Thermostat. Automatic or Manual Changeover Thermostat. Automatic or Manual Changeover (Digital (Digital Non-Programmable Electronic). Electronic). 3 Stage Cool / 3 St
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Manual 2100-449A Page 13 of 13
