Greenheck ERV (476412) - Manual (Page 3)

3 Energy Recovery Ventilator
Table of Contents
Product Overview . . . . . . . . . . . . . 3
Supplemental Installation, Operation and
Maintenance Manuals . . . . . . . . . . . 3
Optional Subassemblies . . . . . . . . . . 3
Installation
Dimensional Data . . . . . . . . . . . . 4-5
Recommended Roof Openings & Weights . . . 6
Service Clearances . . . . . . . . . . . . 7
Access Panel Locations . . . . . . . . . 8-9
Handling . . . . . . . . . . . . . . . . . 9
Lifting . . . . . . . . . . . . . . . . . . 9
Roof Curb Mounting . . . . . . . . . . . . 10
Curb Outside Dimensions and Weights . . . . 10
Ductwork Connections . . . . . . . . . . . 10
Rail Mounting / Layout . . . . . . . . . . . 11
Outdoor Air Weatherhood . . . . . . . . . . 11
Exhaust Weatherhood . . . . . . . . . . . 11
Dampers . . . . . . . . . . . . . . . . . 11
Electrical Information
General Electrical Information . . . . . . . . 12
Control Center Components . . . . . . . . . 13
Optional Accessory Wiring Schematics . . . . 14
Unit Overview . . . . . . . . . . . . . . . 15
Optional Component Overview
Economizer . . . . . . . . . . . . . . . 15
Frost Control . . . . . . . . . . . . . . . 16
Variable Frequency Drive . . . . . . . . . . 16
CO
2
Sensor . . . . . . . . . . . . . . . 16
Rotation Sensor . . . . . . . . . . . . . . 16
Dirty Filter Switch . . . . . . . . . . . . . 16
Service Outlet . . . . . . . . . . . . . . 16
Start-Up
General . . . . . . . . . . . . . . . . . 17
Pre Start-Up Checklist . . . . . . . . . . . 17
Special Tools Required . . . . . . . . . . . 17
Start-Up Checklist . . . . . . . . . . . . . 17
Optional Accessories Checklists . . . . . . . 18
Start-Up Components
Fans . . . . . . . . . . . . . . . . . . 19
Vibration . . . . . . . . . . . . . . . . . 20
Energy Recovery Wheel . . . . . . . . . . 20
Drive Belt . . . . . . . . . . . . . . . . 20
Air Seals . . . . . . . . . . . . . . . . . 20
Optional Start-Up Components
Dirty Filter Switch . . . . . . . . . . . . . 20
Economizer . . . . . . . . . . . . . . . 21
Frost Control . . . . . . . . . . . . . . . 22
Variable Frequency Drives . . . . . . . .22-24
Routine Maintenance. . . . . . . . . . 25-28
Troubleshooting
Economizer Alarms . . . . . . . . . . . . 28
Airflow. . . . . . . . . . . . . . . . . . 29
Unit . . . . . . . . . . . . . . . . . 30-31
Maintenance Log . . . . . . . . . Backcover
Our Commitment . . . . . . . . . Backcover
Product Overview
The ERV brings in fresh, outdoor air and removes
stale, exhaust air. Prior to discharging the exhaust
air, the energy recovery wheel transfers energy from
the exhaust air to the outdoor air at an efficiency
of 70-80%. Simply put, this unit preconditions the
outdoor air to save money on heating and cooling
costs.
Supplemental IOMs
Refer to the following Installation, Operation and
Maintenance (IOM) Manuals for additional details:
• ERV-90 and ERV-120 Curbs
• ERV Exhaust Weatherhood
Optional Subassemblies
Electric Heater Application/Operation
Factory installed electric heaters can be provided for
preheat frost control. An electric preheater warms
the outdoor air prior to the energy recovery wheel
to prevent frosting on the wheel. Electric heaters
are available in 208, 230, or 460 VAC (refer to heater
nameplate for voltage).
Preheaters: Preheaters are standard as single-stage
on/off control. Preheaters are single point wired at
the factory. A thermodisc temperature sensor (with
a 5°F set point) is mounted in the outdoor airstream
after the preheater to turn the preheater on. See Frost
Control Application/Operation for typical set points. If
the temperature falls below
the set point and the wheel
pressure drop sensor is
triggered, the preheater will
turn on.
Access to the preheater
control panel is through the
outdoor air filter door.