OPERATION INSTRUCTIONS ENERGY RECOVERY VENTILATOR WITH EXHAUST Model: QERV-A4B QERV2-A4B For Use With Bard 2 Through 5 Ton QH Series Heat Pumps BARD MANUFACTURING COMPANY Bryan, Ohio 43506 Since 1914...Moving ahead, just as planned.
CONTENTS QERV Model Nomenclature ................................... 1 Electrical Specifications .......................................... 1 Figures Figure 1 Belt Replacement Instructions ................. 6 Figure 2 Hub Assembly with Ball Bearings ............ 7 General Description of QERV ................................ 1 Control Requirements ............................................ 1 Recommended Control Sequences ....................... 2 Ventilation Air Flow ....................................
MODEL NOMENCLATURE Q ERV - A 4 Q - QH Series Model B Modification Code Energy Recovery Ventilator QH Series Cabinet Size 4 - QH241, 301, 361, 421, 481, 601 Electrical A - 230/208 volt ELECTRICAL SPECIFICATIONS Model Voltage Amps Control Voltage QERV 230 / 208 2.2 24V GENERAL DESCRIPTION The Energy Recovery Ventilator was designed to provide energy efficient, cost effective ventilation to meet I. A. Q.
RECOMMENDED CONTROL SEQUENCES Several possible control scenarios are listed below: 1. Use a programmable electronic thermostat with auxiliary terminal to control the QERV based on daily programmed occupancy periods. Bard markets and recommends the White-Rodgers 1F94-80 (Bard Part No. 8403-034), programmable electronic thermostat for heat pump applications. 2. Use a motion sensor in conjunction with a mechanical thermostat to determine occupancy in the classroom. Bard markets the CS2000 for this use. 3.
PERFORMANCE AND APPLICATION DATA TABLE 2 SUMMER COOLING PERFORMANCE (INDOOR DESIGN CONDITIONS 75° DB / 62° WB) Ambient VENTILATION RATE – 450 CFM VENTILATION RATE – 375 CFM VENTILATION RATE – 300 CFM O.D.
TABLE 3 WINTER HEATING PERFORMANCE (INDOOR DESIGN CONDITIONS 70° F DB) Ambient O.D. VENTILATION RATE 450 CFM 80% Eff. 375 CFM 81% Eff. DB Degrees F WVL WHR WVL WHR 300 CFM 802 Eff.
CLEANABILITY AND PERFORMANCE In order to maintain energy recovery ventilation systems, energy transfer surfaces must be accessible for washing to remove oils, grease, tars and dirt that can impede performance or generate odors. Washing of the desiccant surfaces is required to remove contaminate buildups that can reduce adsorption of water molecules.
FIGURE 1 BELT REPLACEMENT INSTRUCTIONS Belt Replacement Instructions Route this part of replacement belt in top groove of pulley. Route this part of replacement belt in bottom groove of pulley. If belt "squeaks" or "chirps" lubricate lightly with LPS-1 or equivalent "dry film" lubricant.
FIGURE 2 HUB ASSEMBLY WITH BALL BEARINGS Manual 2100-310D Page 7
