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INSTALLATION INSTRUCTIONS
ECONOMIZER WITH EXHAUST
MODEL
WGEIFM-3C
WGEIFM-5C
WGSEIFM-5
For Use with Bard 3 - 5 Ton Step Capacity
and
2 - 5 Ton Single Stage
Wall Mount Air Conditioners with Gas Heat
Manual : 2100-498B
Bard Manufacturing Company, Inc.
Supersedes: 2100-498A
Bryan, Ohio 43506
File: Volume III Tab 19
Since 1914...Moving ahead just as planned.
Date: 02-24-10
Manual 2100-498B
© Copyright 2007
Page 1 of 17
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CONTENTS Figures General General Information ................................................. 3 Figure 1 Removal of Exterior Panels .................... 4 Unpacking................................................................ 3 Figure 2 Installation of Economizer ....................... 5 Description............................................................... 3 Figure 3 Install Loose Piece Wire Harness ........... 6 Models ................................................................ 3
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GENERAL GENERAL INFORMATION DESCRIPTION The ventilator should only be installed by a trained The WGEIFM-3C economizer is designed to be used heating and air conditioning technician. These with Bard W24G to W36G 1-stage cooling, 1-stage instructions serve as a guide to the technician installing heating gas electric model wall mounts that are the ventilator package. They are not intended as a step equipped with fan cycling controls. The WGSEIFM-5 by step procedure with which the mechanically in
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INSTALLATION BASIC INSTALLATION 1. Unpack the ventilator assembly which includes the integral ventilator with attached electrical harness, WARNING blank-off plate and miscellaneous hardware. Open and lock unit disconnect switch before 2. Remove and save the existing exterior blower installing this accessory to prevent injury or access and service access panels (see Figure 1). death due to electrical shock or contact with 3. Remove and discard exhaust cover plate (see Figure 1). moving p
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5. Install ventilator sheet metal assembly by inserting 6. Open control panel to gain access to unit low voltage terminal block. the ventilator into the unit – centering between the tubing on the left and the control panel on the right. 7. Install loose piece wire harness plug into filter tray Once the ventilator is fully inserted, slide the & route wires into low volt box. (See Figure 3.) ventilator to align screw hole through the front of (Save back two {2} long red wires with push-on the con
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FIGURE 3 INSTALL LOOSE PIECE WIRE HARNESS PLUG ROUTE WIRES THROUGH WIRE MOUNT, AND INTO HOLE AT REAR OF UNIT INTO LOW VOLTAGE TERMINAL BLOCK AREA PLUG TO SECURE INTO FILTER TRAY MIS-2415 Manual 2100-498B Page 6 of 17
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FIGURE 4 WGSEIFM-5 WIRING DIAGRAM EIFM CONTROL PANEL 6 6 ORANGE DANGER ! 4 ENTHALPY SENSOR * ELECTRICAL SHOCK HAZARD 13 * DISCONNECT POWER BEFORE RED + SERVICING 4 6 S 7 7 9 O BLACK A B 7 7 CONROL 5 8 RELAY 11 TR TR1 BLACK BK 7 C 22 7 BROWN ORANGE O So + 9 G + R Sr 3 3 7 YELLOW Y 5 Y1 Y 66 7 1 PURPLE PR 2 7 Y 55 7 UNIT PINK PK 3 4 Y2 24 VOLT 7 TERMINAL T T1 F 7 STRIP P P1 E 4 4 BLUE BL 16 W1 LOGIC MODULE W2 1 2 3 PL1 8 7 A 7 8 PL2 R TH R UNIT BLOWER SECTION 4056-197 B 9. Mount mixed air t
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EXAMPLE: Adjust the thermostat temperature to engage the first stage of cooling only (Y). This will 1. Measure return air temperature (RAT) cause the dampers to modulate to achieve (assume 75° F for example). mixed air temperature of 55° provided outside 2. Measure outdoor air temperature (OAT) air enthalpy is sufficiently low. If enthalpy is (assume 60° F for example). too high for economizing, low enthalpy can be 3. Calculate the mixed air temperature (MAT) simulated by temporarily removing
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FIGURE 5 ECONOMIZER LOGIC MODULE Manual 2100-498B Page 9 of 17
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WG3S Ventilation Airflow 700 600 500 Stage #2 400 Operation 300 Blower Only & Stage #1 Operation 200 100 0 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 Vent Position WG4S Ventilation Airflow 900 800 700 600 Stage #2 500 Operation Stage #1 Operation 400 Blower Only 300 200 100 0 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 Vent Position Manual 2100-498B Page 10 of 17 Ventilation Airflow (CFM) Ventilation Airflow (CFM)
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WG5S Ventilation Airflow 1000 900 800 700 600 500 Stage #2 Operation 400 Stage #1 Operation 300 Blower Only 200 100 0 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 Vent Position Manual 2100-498B Page 11 of 17 Ventilation Airflow (CFM)
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W24G EIFM Airflow Versus Position - Low Speed 600 550 500 450 400 350 Free Blow 300 .15" ESP 250 .30" ESP 200 150 100 50 0 closed A B C D Open Damper Position W24G EIFM Airflow Versus Position - Medium Speed 700 650 600 550 500 450 400 350 Free Blow 300 .15" ESP 250 .30" ESP 200 150 100 50 0 closed A B C D Open Damper Position W24G EIFM Airflow Versus Position - High Speed 750 700 650 600 550 500 450 400 Free Blow 350 .15" ESP 300 .30" ESP 250 200 150 100 50 0 closed A B C D Open Damper Positio
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W30-36G EIFM Airflow Versus Position - Low Speed 650 600 550 500 450 400 350 Free Blow 300 .15" ESP 250 .30" ESP 200 150 100 50 0 closed A B C D Open Damper Position W30-36G EIFM Airflow Versus Position - Medium Speed 750 700 650 600 550 500 450 400 Free Blow 350 300 .15" ESP 250 .30" ESP 200 150 100 50 0 closed A B C D Open Damper Position W30-36G EIFM Airflow Versus Position - High Speed 800 750 700 650 600 550 500 450 400 Free Blow 350 .15" ESP 300 .30" ESP 250 200 150 100 50 0 closed A B C
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W42-60G EIFM Airflow Versus Position - Low Speed 650 600 550 500 450 400 350 Free Blow 300 0.15" ESP 250 200 0.30" ESP 150 100 50 0 closed A B C D Open Damper Position W42-60G EIFM Airflow Versus Position - Medium Speed 800 750 700 650 600 550 500 450 400 Free Blow 350 0.15" ESP 300 0.30" ESP 250 200 150 100 50 0 closed A B C D Open Damper Position W42-60G EIFM Airflow Versus Position - High Speed 900 850 800 750 700 650 600 550 500 450 Free Blow 400 0.15" ESP 350 300 0.30" ESP 250 200 150 100
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FIGURE 6 ECONOMIZER OPERATION FOR SINGLE COMPRESSOR UNIT Manual 2100-498B Page 15 of 17
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If second stage closes on the thermostat, the dampers ECONOMIZER SEQUENCE OF return to the closed or minimum position setting and the OPERATION compressor starts for mechanical cooling. CONDITION A — COOL OUTDOORS First stage cooling closes and powers the economizer dampers to economizer mode and the indoor blower starts. Mixed Air Sensor senses a mixture of return air and outdoor air and modulates the dampers accordingly. Compressor operation is inhibited. (See Figure 7.) FIGURE 7 CALL FOR B
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CONDITION B — WARM OUTDOORS First stage cooling cycles the compressor and dampers remain in mechanical cooling mode. FIGURE 8 CALL FOR COOLING OPERATION Manual 2100-498B Page 17 of 17
