Greenheck Fan ERV-581, ERV-522, ERV-582, ERV-521, ERV-251 manual Typical Wiring Diagram, Transformer

Page 18

Typical Wiring Diagram

Following is an example of a typical wiring diagram located in the unit control center. This wiring diagram includes a legend highlighting which accessories were provided with the unit. Factory wiring and field wiring are also indicated. This particular example includes 1) variable frequency drives on the blowers requiring a modulating input, 2) modulating energy recovery wheel with factory controls for economizer, 3) energy recovery wheel rotation sensor, 4) outdoor air and exhaust air dirty filter switches, 5) motorized outdoor air and exhaust air intake dampers, and 6) timed exhaust frost control. Many other factory installed and wired accessories are available.

DS1

L1

MAIN POWER

 

L2

 

TO UNIT

 

L3

 

 

 

 

 

 

 

 

 

 

 

GROUND

 

 

 

 

R

S1

G

 

L1

 

 

 

 

 

 

 

 

 

VFD-E

 

 

T1

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T2

 

 

 

L3

 

S1

 

 

 

SC

FR

FC

T3

 

 

 

 

 

 

 

 

 

 

R3

 

 

 

 

EXHAUST FAN

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

MOTOR

 

L1

1

 

 

 

 

0-10 VDC

T1

 

 

 

 

 

 

 

 

 

 

 

 

VFD-S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T2

 

 

 

L3

 

S1

 

 

 

SC

FR

FC

T3

 

 

 

 

 

 

 

 

 

R4

 

 

 

 

SUPPLY FAN

 

 

 

 

 

 

 

 

 

 

 

 

MOTOR

 

 

 

1

 

 

 

 

3

0-10 VDC

 

 

 

 

 

 

 

 

 

 

 

 

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

VFD-W

 

 

T2

 

 

 

L3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T3

 

ENERGY WHEEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S1

 

 

 

 

SC

FR

FC

MA MC

 

 

 

 

R1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEE BELOW FOR

 

 

 

 

3

 

 

 

4

 

 

 

 

 

TERMINAL CONNECTIONS

 

 

 

 

 

 

 

 

FU5

TR1

MULTI-VOLTAGE PRIMARY 24 SECONDARY

C

D1

EXHAUST DAMPER

VFD-E O.L.

LEGEND

CC COMPRESSOR CONTACTOR

CF CONDENSING FAN CONTACTOR

CH COMPRESSOR SUMP HEATER

*D DAMPER

DB POWER DISTRIBUTION BLOCK DL DAMPER LIMIT SWITCH

*DS DISCONNECT SWITCH

*EC ECONOMIZER CONTROLLER

FCS CONDENSOR FAN CYCLE SWITCH FU FUSES

*FU5 CONTROL TRANSFORMER FUSES (NOT ON CLASS II) FZ1 FREEZE PROTECTION

HPS HIGH PRESSURE SWITCH (MANUAL RESET) LPS LOW PRESSURE SWITCH

*PS1 WHEEL FROST PRESSURE SWITCH

*PS2 SUPPLY DIRTY FILTER PRESSURE SWITCH

*PS3 EXHAUST DIRTY FILTER PRESSURE SWITCH

*R1 ENERGY WHEEL RELAY/CONTACTOR

R2 OCCUPIED/UNOCCUPIED RELAY

*R3 EXHAUST BLOWER VFD RELAY

*R4 SUPPLY BLOWER VFD RELAY

R5 MODULATING WHEEL FROST CONTROL RELAY

R6 ECONOMIZER RELAY

R7 COMPRESSOR INTERLOCK RELAY

R8 EVAP RELAY (INDIRECT)

R9 EVAP RELAY (DIRECT)

R10 UNIT RELAY

o S1 FAN SWITCH

*S2 ROTATION SENSOR REED SWITCH

S3 ROTATION SENSOR REED SWITCH

S4 CALL FOR HEAT SWITCH

S5 BYPASS SWITCH

oS6 CALL FOR COOL SWITCH (FIRST STAGE)

S7 CALL FOR COOL SWITCH (SECOND STAGE)

*ST MOTOR STARTER

*T1 FROST CONTROL TIMER

TYPICAL SETTINGS t1(OFF) = 5 MIN., t2(ON) = 30 MIN.

* T2

ROTATION SENSOR TIMER

T3

ROTATION SENSOR TIMER

T4

ECONOMIZER WHEEL JOG TIMER

 

TYPICAL SETTINGS t1(OFF) = 3 HRS., t2(ON) = 10 SEC.

R3T1

6

 

 

 

8

 

 

 

 

 

15

16

 

 

 

 

 

 

R3

EXHAUST FAN

 

 

 

 

MB

MC

2

7

 

 

 

 

 

4

D2

SUPPLY DAMPER

 

 

 

 

VFD-S O.L.

 

 

 

 

 

 

 

 

R4

SUPPLY FAN

 

 

 

 

MB

MC

2

7

 

 

 

 

 

 

R1

ENERGY WHEEL

 

 

MA

TO MA AND MC

A2

A1

 

 

 

MC

ON VFD-W

 

 

S2

1

C

 

 

 

 

 

 

 

 

 

 

6 T2

2

 

 

 

 

ROTATION SENSOR

 

NC

 

 

 

12

 

 

T5

EVAP DELAY OFF TIMER

T6

COMPRESSOR MINIMUM OFF TIMER (TYP. 3 MIN.)

T7

COMPRESSOR MINIMUM OFF TIMER (TYP. 3 MIN.)

* TR

TRANSFORMER

* TS1 FROST CONTROL THERMOSTAT (JUMPER - HEAT)

 

CLOSES ON TEMP. DECREASE TYPICAL SETTING 5º F.

TS2 ECONOMIZER LOW LIMIT THERMOSTAT (JUMPER - HEAT) OPENS ON TEMP. DECREASE TYP. SETTING 20º OFFSET OR 50ºF.

TS3 ECONOMIZER UPPER LIMIT THERMOSTAT (JUMPER - HEAT) CLOSES ON TEMP. DECREASE TYP. SETTING 65º F./2º DIFF.

TS4 ROOM OVERRIDE SENSOR

TS5 INLET AIR POST HEATER LOCKOUT THERMOSTAT (AFTER WHEEL) CLOSES ON TEMP. DECREASE TYPICAL SETTING 65º F.

TS6 INLET AIR COMPRESSOR LOCKOUT THERMOSTAT (JUMPER-HEAT)

OPENS ON TEMP. DECREASE TYPICAL SETTING 60º F./2º DIFF.

*FACTORY SUPPLIED AND WIRED

OA-SENSOR

o FIELD WIRED

S6

Y1

620 OHM RESISTOR OR RETURN AIR SENSOR

OUTDOOR AIR

SENSOR

MIXED AIR

SENSOR

 

 

 

 

24 VAC

SENSOR

COM

THERMOSTAT CONTROLLER(S)

 

 

 

 

THERMOSTAT(S) TS1,

 

 

 

PS1

 

 

 

TS1

 

B1

 

 

 

 

 

 

 

 

 

 

 

6

T1

 

FROST CONTROL

NO C

 

 

COM

NO

A1

A2

 

TR

TR1

 

 

 

 

 

ECONOMIZER CONTROL

1

EC

 

 

 

 

 

 

+

FR

 

 

 

 

 

 

TO FR AND FC

 

 

 

SR

2-10V

 

 

 

 

 

ON VFD-W

 

 

 

-

FC

 

 

 

SR+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SO

 

 

 

 

 

 

 

SO+

5

 

 

 

 

 

 

T2

T1

FIELD CONTROL WIRING RESISTANCE SHOULD NOT EXCEED 0.75 OHM. IF RESISTANCE EXCEEDS 0.75 OHM THEN CONSULT FACTORY. USE 14 GAUGE MINIMUM WIRE THICKNESS FOR CONTROL WIRING.

REPLACEMENT FUSES: MUST HAVE A MINIMUM I.R. RATING OF 5 KA

CAUTION:

UNIT SHALL BE GROUND IN ACCORDANCE WITH N.E.C.

POWER MUST BE OFF WHILE SERVICING.

USER INTERFACE CONNECTIONS:

USER TO VERIFY THAT TR1 CAN HANDLE THE VA LOAD OF INDICATOR DEVICES.

DIRTY FILTER INDICATOR SHOWN AS 24V POWER FROM UNIT.

PS2

NC

C

NO

SUPPLY DIRTY

R

 

 

FILTER SWITCH

 

 

 

 

 

C

34

PS3

EXHAUST DIRTYNCCNO R

FILTER SWITCH

C

FROST CONTROL INDICATOR

6

C

ROTATION INDICATOR

12

C

18Model ERV Energy Recovery Unit

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Page 17 Page 19
Contents General Safety Information Models ERV-251 ERV-361 ERV-521 ERV-581 ERV-522 ERV-582Unpacking Inspection and Maintenance during StorageReceiving HandlingInstallation Table of ContentsSupplemental Installation Operation and Maintenance Manuals Basic OperationLifting Recommended Roof OpeningRoof Curb Mounting Curb Outside Dimensions and WeightsCurb Outside Dimensions Ductwork ConnectionsRail Mounting / Layout Arrangement a Service ClearancesERV-251, ERV-361, ERV-521, ERV-581 ERV-522, ERV-582 Arrangement B, C or DField Control Wiring Length/Gauge Electrical InformationUnit Accessories Access Panel Description and Location ERV-251, ERV-361, ERV-521, ERV-581 ERV-522Outdoor Air Dimensional Data ERV-522 Unit Size Exterior Dimensions Arrangement C Arrangement DOptional Accessories Frost Threshold Temperatures Indoor RH @ 70FFrost Control Application/Operation Modulating the Wheel Testing Temperature Sensor with OverrideEconomizer Application/Operation Enthalpy Sensor with OverrideVariable Frequency Drives for Energy Recovery Blowers Factory Set PointsDrive Operation Economizer Signal Source Variable Frequency Drives for Energy Recovery WheelResetting the drive to factory defaults 10 VDCTypical Wiring Diagram TransformerDirty Filter Sensor Service OutletRotation Sensor CO2 SensorDay Timer or On/Off Switch Remote Control Panel and Wiring SchematicsIndicator Lights powered by the ER Unit Hand/Off/Auto SwitchPressure Sensors analog or digital Temperature Sensors 1K Ohm RTDSensors Mounted by Factory Amp Current Sensors analog or digitalStart-Up Pre Start-Up Checklist check as items areStart-Up Checklist General Start-Up InformationEconomizer Application / Operation section Optional Accessories ChecklistOptional Accessories section Variable Frequency Drives sectionUnit Start-Up Drive Belt Energy Recovery WheelVibration Air SealsFan Belts Routine MaintenanceMaintenance Procedures Lubrication Fan MotorsEnergy Recovery Wheel Maintenance External Filter MaintenanceDoor Seal Maintenance Internal Filter MaintenanceAccessing the Energy Recovery Wheel in Models ERV-522 Removing the Energy Recovery Wheel in ERV-251Wheel segment removed Cleaning the Energy Recovery Wheel Energy Recovery Wheel BeltEnergy Recovery Wheel Bearing Parts List Inside layout of ERV-361 Inside layout of ERV-522Basic Unit Other AccessoriesSequence of Operation Summer OperationTroubleshooting Airflow Troubleshooting Unit Symptom Possible Cause Corrective ActionTroubleshooting Unit Maintenance Log Warranty

ERV-361, ERV-251, ERV-521, ERV-582, ERV-522 specifications

Greenheck Fan has established itself as a leader in the design and manufacturing of high-performance ventilation systems, including its innovative energy recovery ventilators (ERVs). Among their popular models are the ERV-581, ERV-522, ERV-582, ERV-521, and ERV-251, each designed to enhance indoor air quality while optimizing energy efficiency.

The ERV-581 offers comprehensive ventilation solutions for commercial buildings, equipped with advanced heat recovery technology. This model features a robust, compact design, allowing for easy installation in limited spaces. Its efficient energy recovery capabilities transfer heat and moisture between incoming and outgoing airstreams, leading to significant reductions in heating and cooling costs. The ERV-581 also includes a user-friendly control panel for simplified operation.

Next in line, the ERV-522 is engineered for larger spaces, balancing higher airflow rates with enhanced energy recovery performance. This model is particularly beneficial for schools and office buildings, where maintaining fresh air quality is paramount. The ERV-522 employs a two-stage filtration system, ensuring that airborne pollutants are effectively captured before being circulated back into the environment. Its resilient construction further ensures longevity and durability in demanding applications.

The ERV-582 enhances the lineup with its dual-function capability, serving both as an energy recovery ventilator and a dehumidification system. This flexibility makes it an ideal choice for climates with high humidity levels, where moisture control is essential. The ERV-582 incorporates Greenheck’s patented technology for optimal performance under varying temperature and humidity conditions, making it a versatile solution for diverse environments.

The ERV-521 stands out with its eco-friendly design, featuring recyclable components that align with sustainable building practices. This model is particularly favored in LEED-certified projects, where energy efficiency and minimal environmental impact are essential. The ERV-521 also includes an intelligent control system that adjusts airflow rates based on occupancy levels, ensuring optimal energy usage.

Finally, the ERV-251 is a compact, energy-efficient model suited for residential installations. It is designed to fit seamlessly into homes, providing essential ventilation while reducing energy consumption. The user-friendly interface allows homeowners to monitor and adjust settings easily, making the ERV-251 a popular choice for those looking to improve indoor air quality without compromising on comfort.

Together, these Greenheck ERV models exemplify cutting-edge technologies and engineering, paving the way for healthier indoor environments while promoting energy conservation. Each unit is tailored to meet specific application needs, making them invaluable assets for any ventilation strategy.
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