Table of Contents
Advertisement
®
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
**WARNING**
DISCONNECT AND SECURE TO THE "OFF"
POSITION ALL ELECTRICAL POWER TO THE
UNITS PRIOR TO INSPECTION OR SERVICING.
FAILURE TO COMPLY WITH THIS SAFETY
PRECAUTION COULD RESULT IN SERIOUS
INJURY OR DEATH.
**IMPORTANT**
ALL FACTORY PROVIDED LIFTING LUGS MUST
BE USED WHEN LIFTING THE UNITS. FAILURE
TO COMPLY WITH THIS SAFETY PRECAUTION
COULD RESULT IN PROPERTY DAMAGE,
SERIOUS INJURY OR DEATH.
INSTALLATION SUPPLEMENT
Refer to the following Greenheck installation
supplement for ERH units supplied with Indirect
Gas (IG) heating:
Model PVF, Indirect Gas Fired Furnaces for
Energy Recovery Units, Part #461006
READ AND SAVE THESE INSTRUCTIONS
ENERGY RECOVERY UNIT
Models:
ERH-20, 45, 55, & 90
Energy Recovery Wheel
PART #459657
with HEATING
Heating Section
Advertisement
Table of Contents
Summary of Contents for Greenheck ERH-20
- Page 1 READ AND SAVE THESE INSTRUCTIONS PART #459657 ENERGY RECOVERY UNIT with HEATING ® Models: ERH-20, 45, 55, & 90 INSTALLATION, OPERATION AND MAINTENANCE MANUAL **WARNING** Energy Recovery Wheel DISCONNECT AND SECURE TO THE "OFF" POSITION ALL ELECTRICAL POWER TO THE UNITS PRIOR TO INSPECTION OR SERVICING.
-
Page 2: Table Of Contents
TABLE OF CONTENTS Storage ......2 Start Up Checks ....11 General . -
Page 3: Basic Operation
BASIC OPERATION The ERH brings in fresh, Energy outdoor air and Recovery Exhaust Air removes stale, exhaust Wheel from building air. Prior to discharging Exhaust Air the exhaust air, the discharged outside energy recovery wheel transfers energy from the exhaust air to the outdoor air at an efficiency of 70-80%. -
Page 4: Roof Curb Mounting
ROOF CURB MOUNTING 1. Factory Supplied Roof Curbs Roof curbs are Model GKD, which are shipped in a knockdown kit and require field assembly (by others). Assembly instructions are included with the curb. 2. Cut Roof Opening and Locate Curb Layout the unit roof opening such that the supply discharge &... -
Page 5: Weatherhoods
INSTALLATION (continued) WEATHERHOODS Supply weatherhood will be factory mounted. The exhaust weatherhood is shipped separately as a kit with its own instructions. EXHAUST DAMPERS Backdraft dampers for exhaust discharge are mounted in the unit. Motorized dampers are shipped loose (inside ERH) and must be field installed. -
Page 6: Service Clearances
SERVICE CLEARANCES / ACCESS PANEL LOCATIONS for Model ERH ERH-20, 45, 55, and 90 units require minimum clearances for access on all sides for routine maintenance. Filter replacement, drain pan inspection and cleaning, energy wheel cassette inspection, fan bearing lubrication and belt adjustment, are examples of routine maintenance that must be performed. -
Page 7: Water Coil Location And Connection
WATER COIL LOCATION AND CONNECTION A hot water coil can be factory installed in the coil section of the ERH. The coil section is downstream of the energy wheel on the supply air side of the unit. Coil connections are external to the unit as shown below. Coil connections not external have been ordered from the factory with internal or exhaust air stream connections. -
Page 8: Electric Heater Application/Operation
ELECTRIC HEATER APPLICATION/OPERATION Factory installed electric heaters can be provided for preheat and/or post-heat (see FIGURE 11). An electric preheater warms the outdoor air prior to the energy recovery wheel to prevent frosting on the wheel. An electric post-heater warms the air leaving the energy recovery wheel to a user specified discharge temperature. Electric heaters are available in 208, 230, or 460 Vac (refer to heater nameplate for voltage). -
Page 9: Frost Control Application/Operation
FROST CONTROL APPLICATION/OPERATION When outdoor air temperatures are extremely cold, moisture condensation and frosting on the energy recovery wheel is possible. Frost control is an optional feature that will prevent wheel frosting. Two options are available: 1) Timed Exhaust frost control and 2) Preheat frost control Timed exhaust frost control includes a thermostat (with TABLE 6... -
Page 10: Economizer Application/Operation
ECONOMIZER APPLICATION/OPERATION The energy recovery wheel may be de-energized for the purpose of providing economizer (free cooling) operation. This can be achieved with a signal from a Temperature or Enthalpy sensor mounted in the supply air inlet compartment (see FIGURE 13). This Primary sensor will de-energize the energy wheel when the outdoor air temperature (factory default is 65°F) or enthalpy (factory default is the ‘D’... -
Page 11: Start Up Checks
START UP CHECKS **WARNING** DO NOT OPERATE ENERGY RECOVERY VENTILATOR WITHOUT THE FILTERS AND BIRDSCREENS INSTALLED. THEY PREVENT THE ENTRY OF FOREIGN OBJECTS SUCH AS LEAVES, BIRDS, ETC. DO NOT REMOVE ACCESS PANELS OR OTHER UNIT COMPONENTS WHILE STANDING ON A LADDER OR OTHER UNSTEADY BASE. -
Page 12: Fan Rpm
Check pulleys and belts for proper alignment to avoid unnecessary belt wear, noise, vibration and power loss. Motor and drive shafts must be parallel and pulleys in line (see FIGURE 16). FAN RPM The adjustable motor pulley is preset at the factory to the customer specified RPM. -
Page 13: Routine Maintenance
ROUTINE MAINTENANCE CAUTION: See **WARNING** on Page 1 and 11 Once the unit has been put into operation, a periodic maintenance program should be set up to preserve the reliability and performance. Items to be included in this program are: •... -
Page 14: Vibration
VIBRATION Excessive vibration maybe 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 below. Many of these conditions can be discovered by careful observation. 1. -
Page 15: Coil Maintenance
WATER COIL MAINTENANCE CAUTION: See **WARNING** on Page 1 and 11 FILTERS Filters upstream of the coil should be checked regularly. If the filters are dirty, they should be cleaned or replaced. It is important that the coils stay clean to maintain desired airflow. See page 14 for more information on filter maintenance. -
Page 16: Energy Recovery Wheel Maintenance
ROUTINE ENERGY RECOVERY WHEEL MAINTENANCE CAUTION: See **WARNING** on Page 1 and 11 MAINTENANCE OF THE ENERGY RECOVERY WHEEL Annual inspection of the energy recovery wheel is recommended. Units ventilating smoking lounges and other non-clean air spaces should have energy recovery wheel inspections more often based upon need. Inspections for smoke ventilation applications are recommended bimonthly to quarterly until a regular schedule can be established. -
Page 17: Removing Wheel Segments
REMOVING THE ENERGY RECOVERY WHEEL SEGMENTS Model ERH-20, 45, 55, & 90 Steel retainers are located on the Bracket Segment Retainer inside of the wheel rim (FIGURE 22). Push the retainer toward center of Lift Away wheel, then lift up and away to From Segment release segments (FIGURE 23). -
Page 18: Parts List
PARTS LIST Model ERH (shown with indirect gas heater) 1. Supply blower 8. Electrical control box (standard features) - Forward curved fan - Single point power - Adjustable motor mount for belt tensioning - Disconnect interlocked with access door - Adjustable sheaves for speed control - Motor starters for the supply blower, exhaust blower and energy wheel motors. -
Page 19: Unit Trouble Shooting
Trouble Shooting Symptom Possible Cause Corrective Action Blown fuse or open circuit Replace fuse or reset circuit breaker and check amps. breaker. Defective motor or capacitor. Replace Blower Fails to Motor starter overloaded. Reset starter and check amps. Operate Electrical. Check for On/Off switches. - Page 20 Due to continuing product development Greenheck has the right to change specifications without notice GREENHECK Copyright © 2002 Greenheck Fan Corp. IOM ERH FS P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410 PH. 715-359-6171 Rev.