User Guide

Printed in U.S.A. 8/08 © Copyright 2008 TAC All Rights Reserved. F-24586-2
The 2298 Series Unit Ventilator Thermostat has been
designed for the proportional control of pneumatic devices
and actuators in environmental control systems. These
devices are designed primarily as return air controllers in
induction units, fan coil units, and unit ventilators. The 2298
Series will also replace the obsolete 2264 Series Unit
Ventilator Temperature Controllers.
These two-pipe controllers incorporate a receiver controller
which when coupled with the highly-sensitive remote bimetal
sensor system, provides accuracy and stability over the
entire operating range. Models are available in direct or
reverse acting only, or dual pressure summer/winter models
for heating and cooling applications. (See Ordering Data.)
Set point adjustment is accomplished by means of a serrated
“thumb wheel”. A “cooler/warmer” cover with graduated
marks representing 5°F increments from 65 to 85°F is
provided with each controller.
SPECIFICATIONS
Set point range: 65 to 85°F
Throttling range: 4°F fixed.
Adjustments: External or concealed.
Main air pressure:
2298-060, See Ordering Data.
2298-061, 20 psig operating.
2298-062, 20 psig operating.
2298-063, See Ordering Data.
Maximum air pressure: 30 psig.
Table-1 Ordering Data.
Order Number
Replaces
Model
Action Comments
2298-060 T460-301
RA @ 16 psig
DA @ 25 psig
Includes cover
and remote
bimetal sensor
2298-061 T461-301 Direct
2298-062 T462-301 Reverse
2298-063 T463-301
RA @ 16 psig
DA @ 25 psig
Table-2 Replacement Parts.
Order Number
Replaces
Model
Description
20-818 220-17 Mounting Bracket
20-821 100-50
Replacement Sensor for
2293-060 and 2298-062
20-822 100-51
Replacement Sensor for
2293-061 and 2298-063
20-856 C13-42 Replacement Cover
21-800 10-72 Set Point Adjustment Cover
Air consumption:
2298-060, 30 SCIM @ 16 psig; 45 SCIM @ 25 psig.
2298-061, 30 SCIM.
2298-062, 30 SCIM.
2298-063, 30 SCIM @ 16 pisg; 45 SCIM @ 25 psig.
Calibration point: factory calibrated @ 9 psig.
Caution: This device should be installed by a qualified
person with due regard for safety, as improper installation
could result in a hazardous condition.
INSTALLATION INSTRUCTIONS
The mounting bracket, as shown in Figure-1, should be
fastened to a structural member within the end compartment
of terminal units. The mounting bracket may be bent along
the points noted above to allow the unit controller to be
installed beneath an access door or to fit the application in the
terminal unit.
Secure the controller to the mounting bracket by pressing the
“mounting ears” on the back of the controller through the
rectangular slot in the bracket. The sensor should be
mounted in a place which will provide an indication of the
temperature being controlled.
Note: The sensor MUST be mounted in the horizontal
position with the bimetal “up” and the connection down.
Maximum distance between the controller and sensor
should not exceed 200 feet.
Connect the sensor to port “S” on the back of the controller
with 1/4" O.D. tubing. All port connections on the controller
and sensor are for 1/4" O.D. tubing.
2298 Series
Unit Temperature Controllers
Data Sheet