Greenheck Fan 90, HRE-20, 55, 45 manual Drain Trap

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4 in.
2 in.

THE FOLLOWING COMPONENTS SHIP FROM GREENHECK WITH HRE (INSTALLATION, WIRING, AND POWER BY OTHERS)

 

PART DESCRIPTIONS

GREENHECK P/N

QTY.

HOLDING VA

INRUSH VA

JOHNSON CONTROLLER

07458032

1

-

-

OUTDOOR AIR SENSOR

07458298

1

-

-

24 HOUR TIMER

07381940

1

-

-

VALVE, WATER SUPPLY (A)

05461262

1

25

70

VALVE, DRAIN (B)

05461263

1

25

50

VALVE, SUMP DRAIN (C)

05461264

1

25

70

24V AC POWER AND WIRING

BY OTHERS

OUTDOOR AIR

SENSOR

 

24VAC

SENSOR

COM

 

 

JOHNSON CONTROLLER

 

 

 

JC

 

 

15

TIMER

A2

JC

B1

16

T1

 

A1

18

 

 

NC

COM

 

 

 

SIDE OF HRE UNIT

 

 

DRAIN TRAP

SUMP DRAIN PIPE

 

 

(TO EACH EVAP)

 

 

OUTDOOR AIR SENSOR

 

TIMER

VA

VALVE "A"

1/2 PIPE SIZE (NC)

 

VB

VALVE "B"

1/4 PIPE SIZE (NO)

 

VC

VALVE "C"

3/4 PIPE SIZE (NO)

 

Cooling coils are provided with a stainless steel drain pan with 3/4-in. female NPT drain connection. A drain trap must be connected to the drain connection to allow excess water to flow out of the drain pan.. More importantly, though, due to the negative internal static of the cooling coil compartment, installing the drain trap prevents outdoor air from being pulled into the drain pan and consequently forcing water out of the pan and into the unit..

To ensure the drain trap works properly, the trap height must account for the difference in static pressure between ambient conditions outside the unit and the internal

negative pressure of the cooling coil compartment.. For energy recovery units, an assumption of 3..0 in.. wg.. differential will be sufficient.. This would require a trap design as shown.. If the internal static is believed to be higher, consult factory..

Refer to local codes to determine drainage requirements.. If draining onto to roof, place a drip pad below drain to protect

roof.. If draining onto roof is not acceptable, a drain line must be attached to the trap.. The drain line must be pitched away from

the unit at least 1/8-in.. per foot.. On longer runs, an air break should be used to ensure proper drainage.. Local codes may require drainage into a waste water system..

Drainage problems not only occur from improper drain trap design, but also from lack of maintenance of the cooling coil compartment.. Algae can form in the drain pan and trap and cause reduced water flow, which can in turn result in backup into the system.. Regular maintenance will prevent this from occurring.. If the drains have a cleanout opening, be sure to close the opening after cleaning..

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Contents Indirect Evaporative Cooler Read and Save These INSTRUCTIONS461248Direct Evaporative Cooler Storage TABLE OF ContentsBasic Operation Safety Warning InstallationLifting Roof Curb Mounting Ductwork Connections Rail MountingSupply Weatherhood Exhaust WeatherhoodElectrical Information Exploded Detail Terminal Strip TYPICAL CONTROL CENTER COMPONENTSHRE-20 HRE-45 Service Clearances / access panel locationsHRE-55 HRE-90 Model Exterior Dimensions HRE-20 Dimensional Data / Access Door DescriptionsOverall Exterior Dimensions Model Dimensional dataStandard Trap and Supply Line Configuration Evap Module InstallationEvaporative Cooling Modules Evap Module START-UPHRE Water SUPPLY CONNECTION Location Water Flow Adjustment DevicePump and Float ComponentsTop View Trap & Supply Line Configuration with Auto Drain and Fill EvaporativeEvaporative FreezeTimer ProtectionWater Control Options for Evaporative Cooling Auto Drain and Fill with Freeze ProtectionDrain Trap Drain and Overflow Connection Locations Symptom Solution Troubleshooting for evaporative moduleEvaporative Cooling Maintenance Electric Heater Application/Operation Optional accessoriesElectric Preheater Post-Heater Control PanelTimer Frost Threshold TemperaturesTesting Frost Control Application/OperationModulating the Wheel Enthalpy Sensor With Override Economizer Application/OperationYaskawa Yaskawa E7 Variable Frequency Drives for BlowersFactory Setpoints Modulating Control 0-10 VDC for FAN Speed Variable Frequency Drives for Energy Recovery WheelTransformer Wiring DiagramDirty Filter Sensor Rotation SensorCO2 Sensor Service OutletVapor Tight Lights Remote Control Panel and Wiring Schematics Optional AccessoriesIndicator Lights powered by the ER Unit Remote Panel Wiring SchematicsHeating/Cooling Switches and Night Setback Switch/Timer Sensors Mounted by Factory Temperature Sensors 1K Ohm RTDSafety Danger Start-Up Checklist for unitSafety Caution Start-Up Checklist for Evaporative Cooler Start-Up ChecklistSpecial Tools Required Optional Accessories section Optional Accessories ChecklistEconomizer Application / Operation section Variable Frequency Drives sectionFans Forward Curved Type Unit start-upFan Performance Modifications Fan Belt DrivesFan RPM Direction of Fan Wheel RotationVibration Rotation DirectionAir Seals Drive BeltInside layout of HRE unit Date Routine maintenanceDampers LubricationFan Belts Fan MotorsInternal Filter Maintenance External Filter MaintenanceDoor Seal Maintenance BearingsAccess to wheel through Outdoor air filter door Energy Recovery Wheel MaintenanceWheel segment removed Wheel Bearing Wheel Belt & PulleyModel HRE Parts ListBasic Unit Sequence of OperationSummer Operation Winter OperationTest and Balance Report Pressure Drop Across Energy Recovery WheelDesign Airflow Measured AirflowSymptom Possible Cause Corrective Action TroubleshootingWarranty
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45, 55, 90, HRE-20 specifications

The Greenheck Fan HRE series, specifically the models HRE-20, HRE-90, HRE-55, and HRE-45, represents a blend of innovation and efficiency in the HVAC industry. Built for both commercial and industrial applications, these exhaust fans stand out due to their robust design and advanced operational features.

One of the main features of the HRE series is its energy-efficient motor design. These fans come equipped with a premium efficiency motor that reduces energy consumption while maintaining high performance. The motors are specifically designed to provide exceptional airflow while operating at lower sound levels, ensuring a quieter environment.

The HRE models also showcase advanced aerodynamic design, featuring optimized blade geometry that enhances airflow performance. This design ensures that the fans can deliver consistent and effective air movement even at varying operational conditions. This makes the HRE series suitable for use in a wide range of applications, from commercial kitchens to industrial processes.

Another significant characteristic of the HRE series is its durability. Constructed from high-quality materials, these fans are built to withstand harsh environmental conditions and prolonged usage. The robust casing and corrosion-resistant finishes ensure longevity, reducing the need for frequent repairs or replacements.

In terms of installation and maintenance, the HRE series offers significant advantages. The fans are designed for easy installation with clear mounting instructions. Additionally, maintenance procedures are simplified, allowing for hassle-free access to critical components, which reduces downtime and operating costs.

Technologically, the HRE models incorporate advanced controls and monitoring systems. These systems can offer real-time feedback on operational performance, allowing for proactive maintenance and energy management. Integrated controls can be customized to work with building management systems, providing users with seamless integration and control capabilities.

Overall, the Greenheck Fan HRE-20, HRE-90, HRE-55, and HRE-45 exemplify a commitment to quality and efficiency in commercial and industrial ventilation solutions. Their combination of energy efficiency, advanced design, durability, and user-friendly features make them a leading choice for those seeking reliable airflow solutions. These fans not only meet current industry standards but also set a benchmark for performance and innovation in the HVAC sector.
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