Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53450004-01 Printed in U.S.A. Form 45-6SI Pg 1  12-22 Replaces: 45-5SI
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS   . . . . . . . . . . . . . . . . . . . 1
PRE-INSTALLATION  . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• CONTROL OFFERINGS
• STORAGE AND HANDLING
• INITIAL INSPECTION
Unit Identification   . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• INSTALLATION PRECAUTION
• SERVICE ACCESS
• CODES
• UNIT SUSPENSION
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
• CONTROL OPTIONS
VAV CCN Controls and OPEN VAV Controls  . . . . . . 4
VVT CCN Controls and OPEN VVT Controls   . . . . . . 4
Analog Electronic Controls  . . . . . . . . . . . . . . . . . . . . 4
Pneumatic Controls   . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Direct Digital Controls (By Others)  . . . . . . . . . . . . . . 4
No Control Units  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 1 — Install Fan-Powered Box   . . . . . . . . . . . . . . 4
• SELECT LOCATION
• POSITION UNIT
• INSTALL UNIT
Step 2 — Make Duct Connections  . . . . . . . . . . . . . . . 5
Step 3 — Connect Power Wiring  . . . . . . . . . . . . . . . . 5
Step 4 — Set Up System and Calibrate . . . . . . . . . . . 7
• GENERAL
• SET POINTS
• SYSTEM CALIBRATION OF THE INLET AIRFLOW 
SENSOR
START-UP   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Initial Start-Up Procedures . . . . . . . . . . . . . . . . . . . . . 8
Balancing Carrier Fan Terminals . . . . . . . . . . . . . . . . 9
• 45J,K,Q SERIES FLOW UNITS
• BALANCING 45M,N,R PARALLEL FLOW UNITS
Speed Controller  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting Fan Air Flow with ECM Motors  . . . . . . . . . . 17
• VCU (CONTROL OPTION 6)
• ACU-O, 0-10VDC (0-20MA) INPUT 
(CONTROL OPTION 7)
• ACU-P, 2-10VDC (4-20MA) INPUT (CONTROL 
OPTION 8)
General — Single Function Pneumatic Controller 
Control Sequences (1300-1305, 1400-1401)  . . . . 33
Units with Single-Function Controllers  . . . . . . . . . .33
Units with Multi-Function Controllers (Sequences 
1306-1317 and 1402-1405) . . . . . . . . . . . . . . . . . . .34
Operation Sequences   . . . . . . . . . . . . . . . . . . . . . . . .34
Analog Controls Installation and Balancing 
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Thermostat Installation  . . . . . . . . . . . . . . . . . . . . . . .35
Programming Thermostat  . . . . . . . . . . . . . . . . . . . . .36
Controls   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Fan Motor and Wheel . . . . . . . . . . . . . . . . . . . . . . . . .37
• TO CHECK WIRING
• TROUBLESHOOTING
Fan Motor Wiring  . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Fan Motor Maintenance . . . . . . . . . . . . . . . . . . . . . . .37
SAFETY CONSIDERATIONS
 
See Fig. 1 for the Proposition 65 warning label.
Fig. 1 — Proposition 65 Warning Label
IMPORTANT: Air-handling equipment will provide safe 
and reliable service when operated within design specifica-
tions. The equipment should be operated and serviced only 
by authorized personnel who have a thorough knowledge of 
system operation, safety devices, and emergency proce-
dures. Good judgment should be used in applying any man-
ufacturer’s instructions to avoid injury to personnel or 
damage to equipment and property.
WARNING
Disconnect all power to the unit before performing mainte-
nance or service. Unit may automatically start if power is not 
disconnected. Electrical shock and personal injury could result.
WARNING
If it is necessary to remove and dispose of mercury contactors 
in electric heat section, follow all local, state, and federal 
laws regarding disposal of equipment containing hazardous 
materials.
!
WARNING: Cancer - www.P65Warnings.ca.gov
45J,K,M,N,Q,R 
Fan Powered 
Variable Air Volume Terminals