Applications Guide

CEP-4000 Series VAV Flow Controller-Actuators 2 Applications Guide
CEP-4000 General Information
Overview
The CEP-4000 series is a pressure-independent
combination controller-actuator designed primarily
for use on variable air volume terminal units.
Cooling and heating air ow is sensed by a
temperature-compensated hot-wire anemometer.
Velocity sensing is unaected by changes in the duct
air temperature.
The CEP-4000 series oers full-range ow control
of VAV terminal units when used with the CTE-
1000/1100/5000 series room thermostats. Air-velocity
ow control limits are set at the room thermostat or
remotely with the REE-1012 remote-limits accessory
module.
The actuator section provides a magnetic clutch
that allows the actuator to be stalled at either end of
stroke, eliminating the requirement for mechanical
stops or end switches. The controller-actuator is
available with (100°, 60°, and 45°) built-in stops or
(360°) no stops.
Combined with available REE-1000/4000 series
accessory modules, the controllers provide
proportional or multi-position electric or hot-water
reheat, cooling/heating changeover, and dual-duct
applications.
For more specications and mounting instructions,
see the Data Sheet and the Installation Guide for the
CEP-4000 series.
Terminal Denitions:
1. Flow sensor terminal 1
2. Flow sensor terminal 2 (live ow reading with
9–18 VDC = 0–3000 fpm)*
3. Flow sensor terminal 3
4. Thermostat (–) ground*
5. Thermostat (+) 9.1 VDC*
6. Requested ow from T1 or T2 thermostat
(3–6 VDC = 0–3000 fpm)
7. Live ow sensor readout (1–5 VDC = 0–3000 fpm)
8. Unused
9. 24 VAC (–) common
10. 24 VAC (~) phase
11. Motor common
12. Motor drive to increase air velocity (open)*
†
13. Unused
14. Motor drive to decrease air velocity (close)*
†
CAUTION
*Do not short terminals 12 and 14, 4 and 5, or 2
and 4.
†
Do not apply voltage to terminals 12 or 14.
Maintenance
No routine maintenance is required. The motors are
permanently lubricated and all internal gear-train
components are oil-impregnated. Careful installation
will also ensure long term reliability and perfor-
mance.