Greenheck ERV-521 - Manuals

Page 2 - Model ERV Energy Recovery Unit; Receiving

2 Model ERV Energy Recovery Unit Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean with lint-free cloths. Polish any remaining rust from surface wit...

Page 3 - Supplemental Installation, Operation and

3 Model ERV Energy Recovery Unit Table of Contents Basic Operation . . . . . . . . . . . . . . 3 Installation Supplemental Installation, Operation and Maintenance Manuals . . . . . . . . . . . 3 Installation Concerns. . . . . . . . . . . . 3 Lifting . . . . . . . . . . . . . . . . . . 4 Roof Curb an...

Page 4 - Lifting; Unit Weights; *Weight assumes outdoor unit with; Unit Size; All dimensions are in inches.

4 Model ERV Energy Recovery Unit Lifting 1. Before lifting, be sure that all shipping material has been removed from unit. 2. To assist in determining rigging requirements, weights are shown below. 3. Unit must be lifted by all lifting lugs provided on base structure. 4. Rigger to use suitable matin...

Page 5 - Roof curbs are; Curb Outside Dimensions and Weights; Curb Outside Dimensions -; continued; Recommended Discharge Duct Size and Length; Ductwork Connections

5 Model ERV Energy Recovery Unit 1 Fan Wheel Dia. 1 Fan Wheel Dia. Rota tio n Rota tio n R ot ation R ot ation Length of Straight Duct GOOD POOR GOOD POOR GOOD POOR Tu rning Vanes Tu rning Vanes SYSTEM EFFECT FACTOR CURVES FPM X 100 OUTLET VELOCITY 0 5 10 15 20 25 30 35 40 45 1.2 1.0 0.8 0.6 0.4 0.2...

Page 6 - Rail Mounting / Layout; intake opening on the ERV unit. Avoid area dimensioned “B” below.

6 Model ERV Energy Recovery Unit Isometric view of ERV on rails Side view of ERV on rails A B SUPPLY/EXHAUST OPENING OUTDOOR AIR INTAKE HOOD OUTDOOR AIR SIDE OUTDOOR AIR SID E OUTDOOR AIR INTAKE END OUTDOOR AIR INTAKE HOOD OUTDOOR AIR INT AKE END B SUPPLY/EXHAUST OPENING A A B SUPPLY/EXHAUST OPENING...

Page 7 - Service Clearances; drawings below for these dimensions.; Recommended Service Clearances; Arrangement B, C or D

7 Model ERV Energy Recovery Unit Intake Hood Exhaust Hood Cassette slides out* Access Panels Access Panel Access Panel Cassette slides out* Access Panels Access Panels Exhaust Side Outdoor Air Side Exhaust Side Outdoor Air Side Service Clearances ERV-251, 361, 521 and 581 units require minimum clear...

Page 8 - Electrical Information; See voltage use range on the rating; Field Control Wiring Length/Gauge; Total

8 Model ERV Energy Recovery Unit Electrical Information The unit must be electrically grounded in accordance with the current National Electrical Code, ANSI/NFPA 70. In Canada, use current CSA Standard C22.1, Canadian Electrical Code, Part 1. In addition, the installer should be aware of any local o...

Page 9 - Typical Control Center Components; Exploded Detail; Access to Control Center Components; Electric Heater Application/Operation; Electric Preheater:; Outdoor Air Weatherhood; Unit Accessories

9 Model ERV Energy Recovery Unit Typical Control Center Components 1. Main Disconnect (non-fusible, lockable) 2. Motor Starter – Exhaust Air Fan 3. Motor Starter – Outdoor Air Fan 4. Motor Contactor – Energy Wheel 5. 24 VAC Control Transformer 6. 24 VAC Terminal strip 7. Fuses for blower motors 1 2 ...

Page 10 - Access Panel Description and Location; Arrangement A

10 Model ERV Energy Recovery Unit Access Panel Description and Location ERV-251, ERV-361, ERV-521, ERV-581 ERV-522 Interior Outdoor Air Inlet Exhaust Air Discharge Rooftop Exhaust Hood Intake Hood Exhaust Air Inlet Outdoor Air Discharge Arrangement A 1 2 3 4 Interior Outdoor Air Inlet Exhaust Air Di...

Page 11 - Interior

11 Model ERV Energy Recovery Unit Interior Rooftop Exhaust Air Inlet Outdoor Air Inlet Exhaust Air Discharge Exhaust Hood Intake Hood Outdoor Air Discharge 1 2 3 3 4 Interior Rooftop Exhaust Air Inlet Outdoor Air Inlet Exhaust Air Discharge Exhaust Hood Intake Hood Outdoor Air Discharge 2 4 3 3 1 ER...

Page 12 - Dimensional Data

12 Model ERV Energy Recovery Unit ERV-251, 361, 521 and 581 Dimensional Data Exhaust Air Inlet F x G Outdoor Air Discharge L x K Intake Hood Arrangement A A B C Outdoor Air Inlet Q x P Exhaust Air Discharge L x K C B A D E Arrangement B Exhaust Air Inlet F x G Outdoor Air Discharge L x K Intake Hood...

Page 14 - Electric preheat frost control; Frost Control Application/Operation; and; the outdoor air temperature sensor; Frost Threshold Temperatures; Optional Accessories

14 Model ERV Energy Recovery Unit • After testing, set the Timer Scale as follows: T1 = 10 minutes, T2 = 1 hour • Set the Timer Settings as follows: T1 = 0.5, T2 = 0.5 The timer is now set for 5 minutes off and 30 minutes on. Remember to remove the jumper. Electric preheat frost control includes an ...

Page 15 - Economizer Application/Operation; Temperature Sensor with Override; wheel should start rotating.; Enthalpy Sensor with Override; Enthalpy Sensor to terminal So.; Sequence of Operation:; The variable frequency; ) is the outdoor air temperature set point,; is the supply air discharge thermostat set point.; Wheel runs at full speed.

15 Model ERV Energy Recovery Unit Economizer Application/Operation The energy recovery wheel operation can be altered to take advantage of economizer operation (free cooling). Two modes are available: 1. De-energizing the wheel 2. Modulating the wheelA field supplied call for cool (Y1) is required.D...

Page 16 - Factory Set Points; • SC to S4 - Drive runs at 40Hz; Variable Frequency Drives for Energy Recovery Blowers; FOR ONE 0-10 SIGNAL, WIRE TO DRIVES IN PARALLEL; SC; SEE VFD INSTALLATION MANUAL FOR MORE DETAIL

16 Model ERV Energy Recovery Unit Factory Set Points Variable Frequency Drives (VFDs) for the blowers are factory setup to operate in one of the three following modes: Modulating: 0-10 VDC signal wired in the field by others varies the speed of the blower between 30 and 60Hz Multi-speed: Digital con...

Page 17 - Setting; MODULATING CONTROL FOR FAN SPEED; Factory Set Points -; Resetting the drive to factory defaults

17 Model ERV Energy Recovery Unit Parameter Setting – J1000 A1-01 Access Level 2 b1-17 VFD Auto Start 1 C6-02 Carrier Frequency 2 d2-01 Ref Upper Limit 100% or 66%* d2-02 Ref Lower Limit 5% E2-01 Motor Rated FLA Motor FLA E2-03 Motor No-Load Current Must be less than FLA H1-02 Multi-Function Input (...

Page 18 - Typical Wiring Diagram

18 Model ERV Energy Recovery Unit FACTORY SUPPLIED AND WIRED G MULTI-VOLTAGE PRIMARY 24 SECONDARY TR1 C FU5 TO UNIT MAIN POWER L3 L2 L1 DS1 SUPPLY DAMPER D2 ENERGY WHEEL R1 R TR1 SO SR 3 FR FC 2-10V - + 1 TR 5 4 2 SR+ RETURN AIR SENSOR MIXED AIR SENSOR T T1 620 OHM RESISTOR OR OUTDOOR AIR SENSOR SO+...

Page 19 - levels

19 Model ERV Energy Recovery Unit Rotation Sensor The rotation sensor monitors energy recovery wheel rotation. If the wheel should stop rotating, the sensor will close a set of contacts in the unit control center. Field wiring of a light (or other alarm) between terminals R & 12 in the unit cont...

Page 20 - Indicator Lights powered by the ER Unit; Refer to Pressure Switch for voltage and load ratings.; “On” - Manual Operation

20 Model ERV Energy Recovery Unit Remote Control Panel and Wiring Schematics Indicator Lights powered by the ER Unit Dirty Filter Indicator (power by others) Refer to Pressure Switch for voltage and load ratings. 7-Day Timer or On/Off Switch G C R 7-Day Timer S1 - Unit On/Off Terminal Block in Unit ...

Page 21 - Temperature Sensors - 1K Ohm RTD; Sensors Mounted by Factory; ENERGY WHEEL

21 Model ERV Energy Recovery Unit Temperature Sensors - 1K Ohm RTD Drawing Labels Terminal Strip Labels OAI OA/Supply Inlet Temp OAAW OA After Wheel RAI RA/Exhaust Inlet Temp OAD Supply Discharge Temp EAW Exhaust After Wheel Temp Pressure Sensors (analog or digital) Drawing Labels Terminal Strip Lab...

Page 22 - General Start-Up Information; check as items are; DANGER

22 Model ERV Energy Recovery Unit Start-Up o Rotate the fan wheels and energy recovery wheels by hand and ensure no parts are rubbing. If rubbing occurs, refer to Start-Up section for more information. o Check the fan belt drives for proper alignment and tension (refer to Start-Up section for more i...

Page 23 - Optional Accessories Checklist

23 Model ERV Energy Recovery Unit Frost Control Application / Operation section: Setting Factory Default Yes No Frost Control set point 5ºF Differential 2ºF Timer Refer to IOM Yes No Frost Control Modulating Refer to IOM Economizer Application / Operation section: Yes No Economizer (temperature) Set...

Page 24 - CAUTION; Forward Curved

24 Model ERV Energy Recovery Unit Unit Start-Up Refer to Parts List section for component locations. Fans The ERV models contain two forward curved (supply & exhaust) fans. These forward curved fans should be checked for free rotation. If any binding occurs, check for concealed damage and foreig...

Page 25 - Vibration; Energy Recovery Wheel; Inside layout of ERV-361

25 Model ERV Energy Recovery Unit Vibration Excessive vibration may be experienced during initial start-up. Left unchecked, excessive vibration can cause a multitude of problems, including structural and/or component failure. The most common sources of vibration are listed.Many of these conditions c...

Page 26 - Dampers; Fan Motors; Routine Maintenance; Maintenance Procedures:; Lubrication

26 Model ERV Energy Recovery Unit Dampers Check all dampers to ensure they open and close properly and without binding. Backdraft dampers can be checked by hand to determine if blades open and close freely. Apply power to motorized dampers to ensure the actuator opens and closes the damper as design...

Page 27 - Fan Wheel & Fasteners; Bearings; Access to the outdoor air filters; Door Seal Maintenance; Closed cell foam; Outdoor air intake hood; Energy Recovery Wheel Maintenance; Access to wheel through

27 Model ERV Energy Recovery Unit Fan Wheel & Fasteners Wheels require very little attention when moving clean air. Occasionally oil and dust may accumulate on the wheel causing imbalance. When this occurs the wheel and housing should be cleaned to assure smooth and safe operation. Inspect fan i...

Page 28 - ERV-522 has two energy wheels with access; Wheel segment removed; Place retainers back in the original

28 Model ERV Energy Recovery Unit Accessing the Energy Recovery Wheel in Models ERV-522 and 582 Disconnect power to the ERV. Remove access panel(s) labeled “Energy Wheel Cassette Access”, which reveals the energy wheel cassette. There are additional panels that must be removed in order to slide out ...

Page 29 - Cleaning the Energy Recovery Wheel; not recommended; Energy Recovery Wheel Belt

29 Model ERV Energy Recovery Unit Cleaning the Energy Recovery Wheel If the wheel appears excessively dirty, it should be cleaned to ensure maximum operating efficiency. Only excessive buildup of foreign material needs to be removed. Discoloration and staining of energy recovery wheel does not affec...

Page 30 - Parts List

30 Model ERV Energy Recovery Unit Parts List (shown with intake weatherhood, exhaust weatherhood, outdoor air filters, and exhaust air filters) 1. Supply blower • Forward curved fan • Adjustable motor mount for belt tensioning • Adjustable sheaves for speed control 2. Vibrations isolators (quantity ...

Page 31 - Sequence of Operation; Basic Unit; Economizer Operation:; Winter Operation; Frost Control Operation:

31 Model ERV Energy Recovery Unit Sequence of Operation Basic Unit The ERV units are prewired such that when a call for outside air is made (via field supplied 24 VAC control signal wired to unit control center), the supply fan, exhaust fan and energy wheel are energized and optional motorized dampe...

Page 32 - Troubleshooting – Airflow; Test and Balance Report

32 Model ERV Energy Recovery Unit Troubleshooting – Airflow Test and Balance Report The Test and Balance Report (TAB) is utilized to determine whether the appropriate amount of outdoor air and exhaust air is being supplied and removed from a building, respectively. There are no set rules on what inf...

Page 33 - Symptom; Troubleshooting – Unit

33 Model ERV Energy Recovery Unit Always have a completed Pre Start-Up Checklist, unit Start-Up Checklist, and Optional Accessories Checklist prior to requesting parts or service information. Symptom Possible Cause Corrective Action Blower fails to operate Blown fuse or open circuit breaker. Replace...

Page 35 - Maintenance Log

35 Model ERV Energy Recovery Unit Maintenance Log Date __________________ Time _____________ AM/PMNotes:____________________________________________________________________________________________________________________________________________________________________________________________________...

Page 36 - Warranty

36 Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date. The energy recovery wheel is warranted to be free from defects in material and workmanship for a period of five years from the purchase date. Any units or parts w...