Bard 920-0074 QWSERV Operation Instructions Manual Download

Page: 1 / 12

Manual

2100-533A

Page

1 of 12

OPERATION INSTRUCTIONS

Model:

920-0074
QWSERV

ENERGY RECOVERY VENTILATOR

WITH EXHAUST

For Use With Bard

2 Through 5 Ton

QW*S Series

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506

Since 1914...Moving ahead, just as planned.

Manual:

2100-533A

Supersedes:

2100-533

File:

Volume II, Tab 14

Date:

12-08-10

Summary of Contents for 920-0074 QWSERV

Page 1: ...20 0074 QWSERV ENERGY RECOVERY VENTILATOR WITH EXHAUST For Use With Bard 2 Through 5 Ton QW S Series Bard Manufacturing Company Inc Bryan Ohio 43506 Since 1914 Moving ahead just as planned Manual 2100 533A Supersedes 2100 533 File Volume II Tab 14 Date 12 08 10 ...

Page 2: ...ator Maintenance 6 7 Maintenance Procedures 7 Figures Figure 1 Blower Speed Adjustment 4 Figure 2 Belt Replacement 8 Figure 3 Hub Assembly with Ball Bearings 9 Figure 4 Disconnect Tape Off Wiring 11 Figure 5 Field Set CO2 Sensor Jumpers 12 Wiring Diagram 10 Tables Table 1 Ventilation Air CFM 4 Table 2 Summer Cooling Performance 5 Table 3 Winter Heating Performance 6 COPYRIGHT DECEMBER 2009 BARD MA...

Page 3: ...t recommended below 5 F outdoor temperature because freezing of moisture in the heat transfer wheel can occur CONTROL REQUIREMENTS 1 Indoor blower motor must be run whenever the ERV is run 2 Select the correct motor speed on the ERV Using Table 1 of the ERV Installation Instructions determine the motor speed needed to get the desired amount of ventilation air needed For instance do not use the hig...

Page 4: ...ontrol circuit from the factory With the X Remote Thermostat Option it is default wired into the A terminal which drives the vent to operate only during occupied periods when using a Bard 8403 060 thermostat or Bard CS2000 controller If you prefer for the QWSERV to operate anytime the blower is operational you will need to install a jumper wire from G to A If you prefer to use Bard 8403 056 CO2 co...

Page 5: ... 3 2 8 0 8 4 6 0 8 4 6 0 8 4 6 0 8 4 6 0 8 4 6 0 8 4 6 0 8 4 6 0 8 5 4 1 0 3 8 7 5 5 7 1 0 0 0 1 1 4 1 7 8 5 9 7 1 5 5 1 4 3 4 1 4 3 4 1 4 3 4 1 4 3 4 1 4 3 4 1 4 3 4 1 4 3 4 8 6 7 9 6 4 2 5 5 7 1 1 0 0 0 9 0 8 5 7 0 7 5 6 0 6 0 9 5 1 3 5 6 4 1 2 2 5 3 2 1 0 9 2 7 0 9 2 7 0 9 2 7 0 9 2 7 0 9 2 7 0 9 2 7 0 9 2 7 0 0 3 4 2 5 7 1 4 1 2 6 0 5 0 0 3 3 5 0 2 2 5 9 3 1 9 2 0 8 8 3 7 4 8 3 7 4 8 3 7 4 8 3...

Page 6: ...ntain latent transfer efficiency Similar washing cycles may also be appropriate for industrial applications involving the ventilation of high levels of smoke or oil based aerosols such as those found in welding or machining operations for example In these applications latent efficiency losses of as much as 40 or more may develop over a period of one to three years NOTE Sensible performance only is...

Page 7: ... 3 Inspect energy recovery ventilator for proper wheel rotation and dirt buildup This can be done in conjunction with Item 2 above Energize the energy recovery ventilator after inspecting the filter and observe for proper rotation and or dirt buildup 4 Recommended energy recovery wheel cleaning procedures follow Disconnect all power to the unit Open the front hinged service door to the unit 5 Remo...

Page 8: ...LACEMENT INSTRUCTIONS Belt Replacement Instructions MIS 2166 Route 1 replacement belt in bottom groove of pulley Route 1 replacement belt in top groove of pulley If belts squeak or chirp lubricate lightly with LPS 1 or equivalent dry film lubricant ...

Page 9: ...Manual 2100 533A Page 9 of 12 FIGURE 3 HUB ASSEMBLY WITH BALL BEARINGS ...

Page 10: ...d Plug Motor Capacitor Capacitor 4 3 Note See Control Wiring Section of Installation Inst for Wiring Energy Recovery to Unit Note See Control Wiring Section of Installation Inst 1 2 Blower Motor Cassette Speed Plug Exhaust Relay Cassette Motor Plug Control 4 1 Motor Plug Transformer Power Plug Intake Motor Com 208V Cassette Exhaust Motor 3 Exhaust Blower Ground To Unit High Voltage 240 208 60 1 Bl...

Page 11: ...Manual 2100 533A Page 11 of 12 FIGURE 4 DISCONNECT TAPE OFF WIRE DISCONNECT AND TAPE OFF FOR CO2 CONTROLLED VENTILATION MIS 2759 ...

Page 12: ...f 12 FIGURE 5 FIELD SET CO2 SENSOR JUMPERS AN SET TO VOLTAGE SW2 SET TO ON OUT SET TO 20 100 AN OFF ON ON OFF 0 100 20 100 VOLTAGE CURRENT OUT SW2SW1 SW1 SET TO ON MIS 2756 QWSERV VENT PACKAGE CO2 CONTROLLER SETTING FOR 1000 PPM ...

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