A
M-TRAC1
IOM-55
May 2019
5
INTRODUCTION
The M-TRAC1 is a discharge air temperature controller of large (BTUH) single volume direct-
fired Engineered Air equipment, using 120 Vac safety shut off valves, and operating a
modulating ball valve actuator.
The information used in this manual should be used in conjunction with the unit function
sheet(s) and the HE series Installation, Operation, and Maintenance manual.
The M-TRAC1 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 M-TRAC1 models are backwards compatible, however
some additional wiring may be required. M-TRAC1 controllers with a ( - P ) designation are
designed for propane fuel.
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: 2 k
Environment: -40 to 120°F (-40 to 50°C) non-condensing.
Fuse Rating: 1.25 GDC slow-blow
