A
W-TRAC
IOM‐49
5 of 12
Mar 99 R4
INTRODUCTION
The W‐TRAC is a supervisory controller for Engineered Air HRW heat wheels, with built in discharge air
temperature control and optional exhaust frost control.
The information used in this manual should be used in conjunction with the unit function sheet(s) and the
HRW series Installation, Operation, and Maintenance manual.
The W‐TRAC is designed to control only Engineered Air equipment. Various upgrades and improvements
have been made over time. Always include any suffix letters and numbers for troubleshooting and/or
replacement. All W‐TRAC models are backwards compatible; however some additional wiring may be
required.
Note: It is necessary that all of the remote wiring and controls be complete and operational before starting
the appliance.
CONTROLLER
RATINGS
Power requirements: 24 VAC, 40 VA.
Contact Rating: 120V 3A inductive
0‐10 Vdc input impedance: 5 k
Environment: ‐40 to 120°F (‐40 to 50°C) non‐condensing.
