Applications Guide

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Table Of Contents

CEP-4000 Series VAV Flow Controller-Actuators 1 Applications Guide

Applications Guide

VAV Flow Controller-Actuators

CEP-4000 Series

CEP-4000 General Information ..................................................................................................................................2

Overview .............................................................................................................................................................2

Maintenance

........................................................................................................................................................2

Model History and Replacement Issues

...............................................................................................................3

CEP-4995 Universal Replacement .......................................................................................................................4

Wiring .................................................................................................................................................................4

Rotation Setup and Override ...............................................................................................................................5

Voltage/Velocity Correlation

...............................................................................................................................6

Basic Control Logic

..............................................................................................................................................7

The Controller ...............................................................................................................................................7

The Flow Sensor ............................................................................................................................................7

The Thermostat ..............................................................................................................................................7

Controller/System Checkout/Troubleshooting Procedure

....................................................................................8

Verifying Proper Operation

...........................................................................................................................8

Overriding to Open ......................................................................................................................................8

Other Troubleshooting ..................................................................................................................................8

SSE-1000/2000 Flow Sensors .....................................................................................................................................9

Thermostats

...............................................................................................................................................................9

CTE-1000/1100/5000 Series

................................................................................................................................9

CEE-1000 Series with Remote Sensor ................................................................................................................10

Thermostat Troubleshooting ..............................................................................................................................11

VAV Single Duct Cooling/Heating Applications .......................................................................................................12

Cooling

..............................................................................................................................................................12

Cooling with Morning Warm-Up

.......................................................................................................................13

Cooling with 3-Stage Reheat .............................................................................................................................14

Cooling/Heating Changeover ............................................................................................................................15

Cooling with Proportional Hot Water Reheat ....................................................................................................16

Fan Box with Reheat

..........................................................................................................................................17

Day/Night with Fan Box Reheat

........................................................................................................................18

Damper Tracking (Master/Slave) ........................................................................................................................19

VAV Dual Duct Cooling/Heating Applications .........................................................................................................20

Heating and Cooling VAV ..................................................................................................................................20

Heating/Cooling Constant Volume w/ Hot Deck Make-Up

................................................................................21

Index

........................................................................................................................................................................22

Summary of content (22 pages)

PAGE 1
VAV Flow Controller-Actuators CEP-4000 Series Applications Guide CEP-4000 General Information...................................................................................................................................2 Overview..............................................................................................................................................................2 Maintenance..........................................................................................................
PAGE 2
CEP-4000 General Information Overview Terminal Definitions: 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 flow is sensed by a temperature-compensated hot-wire anemometer. Velocity sensing is unaffected by changes in the duct air temperature. 1. Flow sensor terminal 1 2. Flow sensor terminal 2 (live flow reading with 9–18 VDC = 0–3000 fpm)* 3. Flow sensor terminal 3 4.
PAGE 3
Model History and Replacement Issues The CEP-4000 series uses a “half-wave” power circuit, which is not compatible with some of the REE-1000 series accessories module relays (that may be found in earlier installations).
PAGE 4
CEP-4995 Universal Replacement Wiring The CEP-4995 (100° rotation, CW to close, no sensor) is a “universal replacement” for most applications and will replace MOST CEP-1000/3000/4000 series controllers. The CEP-4995 is factory-wired to rotate clockwise (CW) to close and has internal stops that limit actuator rotation to 100 degrees. No sensor is included, and the unit must be calibrated with the existing sensor.
PAGE 5
Adjustments and Calibration Rotation Setup and Override Each CEP-4000 is calibrated to its SSE series sensor at the factory. No further calibration is needed. If the units are replaced or become mismatched, complete the following steps to recalibrate the controller and sensor. If desired, the rotation direction can be reversed by swapping the red and blue motor wires according to the following table: 1. Follow steps 1 and 3 under the Wiring section. Connection of the thermostat is not necessary. 2.
PAGE 6
Voltage/Velocity Correlation Requested Flow from Thermostat (VDC) Terminal 6* Live Flow Sensor Reading (VDC) Terminal 2 Terminal 7** Velocity (FPM) 3.00 3.10 3.20 3.30 9.00 9.30 9.60 9.90 1.00 1.13 1.27 1.40 0 20 40 65 3.40 3.50 3.60 3.70 10.20 10.50 10.80 11.10 1.53 1.67 1.80 1.93 95 130 175 225 3.80 3.90 4.00 4.10 11.40 11.70 12.00 12.30 2.07 2.20 2.33 2.47 290 370 450 550 4.20 4.30 4.40 4.50 12.60 12.90 13.20 13.50 2.60 2.73 2.87 3.00 650 760 875 1000 4.60 4.70 4.80 4.90 13.80 14.
PAGE 7
Basic Control Logic The Controller The Thermostat The CEP-4000 Series Controller Actuator is designed to: The CTE-1000/1100/5000 series thermostats can be used with the CEP-4000 series. These thermostats measure room temperature, compare it to the setpoint, and output an appropriate signal to the CEP4000 to reset airflow accordingly. • Receive a “Requested Flow” signal from the thermostat (3–6 VDC on terminal 6). (See the Voltage/Velocity Correlation section.
PAGE 8
Controller/System Checkout/Troubleshooting Procedure Verifying Proper Operation The following set-up guide is directed towards single duct cooling applications, the same concepts can be applied to other configurations. 1. Verify supply voltage of 24 VAC at terminals 10 (phase) and 9 (ground). A. Tolerance can be –15% to +20% (20.4–28.8 VAC). If the voltage is outside this range, replace the transformer. B. If there is no voltage, be sure power is turned on.
PAGE 9
SSE-1000/2000 Flow Sensors Thermostats The SSE-1000/2000 series are “hot wire anemometer” sensors. The sensor consists of two coils of wire mounted in the air stream: one monitors airflow, while the other is a reference used for duct temperature compensation. The SSE-2000 series sensors also include a temperature sensor for use with heating/ cooling “changeover” applications (requires an additional relay module). CTE-1000/1100/5000 Series The CTE-1000/1100/5000 series thermostats operate on a 9.
PAGE 10
CEE-1000 Series with Remote Sensor This series of thermostat is similar to the corresponding model of CTE thermostat, but the CEE Series requires use of a “remote” temperature sensor. For specific application details on each model refer to the relevant product Data Sheet and/or Installation Guide. Typical CEE Series Thermostat CTE-1103 When wiring these thermostats, 18 to 20 AWG wire is recommended. Make sure all jumper wires under terminal screws have a secure connection. 1. Verify 9.
PAGE 11
Thermostat Troubleshooting 1. Verify MIN VELOCITY voltage: A. Adjust the CTE series thermostat’s setpoint slider for minimum airflow. B. Verify the minimum setpoint adjustment capability by reading the thermostat voltage output (at the CEP terminals 4 and 6 or the equivalent connections on the thermostat terminals using the front meter taps and HSO-5001 meter leads), adjusting the MIN VELOCITY potentiometer fully clockwise, and measuring a maximum voltage setpoint between 6.0 and 7.5 VDC. C.
PAGE 12
VAV Single Duct Cooling/Heating Applications Cooling (Former Ref. # APE-1-4001) CTE-1001/1002/1101 single-setpoint thermostats are designed for use with CEP-4000 series electronic VAV controllers to operate damper boxes and/or valves in the HVAC system. A “requested flow” voltage signal (T1 or T2) is wired to the CEP-4000 series controller to adjust airflow from minimum to maximum flow according to space demand. Both minimum and maximum flow limit adjustments can be made at the thermostat.
PAGE 13
Cooling with Morning Warm-Up (Former Ref. # APE-1-4007) Adding a single-pole double-throw relay to basic heating or cooling configuration commands the unit to a “full open” position when the relay contacts are energized. As shown in the diagram below, terminal 6 (requested flow) is connected to either “T1” (normal) or to terminal 5 (9.1 VDC for full flow) on activation of the relay.
PAGE 14
Cooling with 3-Stage Reheat (Former Ref. # APE-1-4005) The CTE-1004 electronic thermostat is a dual setpoint thermostat for heating (RA) and cooling (DA) applications. The application below uses an SSE-1000 series sensor, an REE-4001 relay module, and three 24 VAC contactors for three stages of reheat. The transformer must supply a minimum of 14 VA plus the requirements for the reheat contactor coils (10 VA maximum per stage). auxiliary flow.
PAGE 15
Cooling/Heating Changeover (Former Ref. # APE-1-4014) The CTE-1103 electronic thermostat is a dual setpoint thermostat for heating (RA) and cooling (DA) applications. When using an SSE-2000 series sensor and an REE-1005 relay module (as shown below), an automatic changeover is provided for heating/cooling applications. The sensor and relay combination will switch between the T1 (cooling) and T2 (heating) signal to the VAV terminal based on the temperature of the supply air.
PAGE 16
Cooling with Proportional Hot Water Reheat In this application, with limits at the thermostat, the CTE-1004 (DA cooling and RA heating) is used in conjunction with the REE-4006 time proportioning relay module and the (NC) VEP-12/22/34 series hot water valve. The REE-4006 relay is designed for time proportioning control of electrical hot water valves. (Former Ref. # APE-1-4017) After the thermostat drops below setpoint, it energizes the relay to open the hot water valve for heat.
PAGE 17
Fan Box with Reheat (Former Ref. # APE-3-4001) The CTE-1101 electronic thermostat is a singlesetpoint thermostat for cooling (DA). In this application, the thermostat is used with the REE4002 relay module, a fan, and two coils for two stages of reheat. The REE-4002 was designed primarily for use with VAV fan powered induction boxes. the temperature continues to drop, the first stage of reheat begins, and the second stage of reheat follows if the thermostat is still not satisfied.
PAGE 18
Day/Night with Fan Box Reheat (Former Ref. # APE-3-4003) The CTE-1105 (DA) and CTE-1108 (RA) electronic thermostats are dual-setpoint “Day-Night” units, typically used for temperature setback/setup applications. This application shows a separate relay (often energized by a time clock or switch) used to toggle the “requested flow” signal from the thermostat to the controller according to the mode of operation.
PAGE 19
Damper Tracking (Master/Slave) (Former Ref. # APE-5-4001) The configuration is used for special applications where a differential pressure is needed (either positive or negative). The CTE-1101 DA thermostat controls the “master” controller-actuator and an REE-1013 relay is utilized to control the “slave” controller. The relay takes the voltage reading from the master controller and repeats it to the slave controller plus or minus a given offset.
PAGE 20
VAV Dual Duct Cooling/Heating Applications Heating and Cooling VAV (Former Ref. # APE-2-4001) Dual duct applications are easily accomplished by connecting two CEP-4000 series controllers with a dual setpoint (RA/DA) thermostat as shown below. In this application, the CEP controllers are mounted separately on the hot and cold air-duct dampers, with each utilizing it’s own flow sensor.
PAGE 21
Heating/Cooling Constant Volume w/ Hot Deck Make-Up The following application is designed for dual-duct installations requiring a constant volume of airflow into the space at all times. In this application, a single-duct cooling controller is mounted on the cold air duct, and its minimum and maximum flow is reset by the room thermostat.
PAGE 22
Index A M “Actual Flow” Signal: 7 Adjustments: 5 Master/Slave: 19 Motor Gearbox HPO-0062: 3 C O Calibration: 5 CEE-1000 Series: 10 CEP-1000 Series: 3 CEP-3000 Series: 3 CEP-4995 “Universal Replacement”: 3, 4 Checkout/Troubleshooting: 8 Cold Deck: 20, 21 Conformal Coating: 3 Constant Volume: 20, 21 Cooling: 12 Cooling/Heating Changeover: 15 Cooling with 3-Stage Reheat: 14 Cooling with Morning Warm-Up: 13 Cooling with Proportional Hot Water Reheat: 16 CTE-1000/1100/5000 Series: 9 CTE-1001/1101: 12 CTE-1