RAYDOT CVS-21HA User Manual

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Tem perature Controller

CVS-21HA

User's G uide

SET

R ead this guide carefully before using the controller.

Table of Contents

Summary of Contents for RAYDOT CVS-21HA

Page 1 Tem perature Controller CVS-21HA User's G uide R ead this guide carefully before using the controller.
Page 2: Table Of Contents
HOW THE CONTROLLER OPERATES ..........31 TROUBLESHOOTING ............... 34 TECHNICAL SPECIFICATIONS ............37 FOR CUSTOMER USE This controller has a serial number located on the side of the enclosure. Please record this number and retain it for your records. CVS-21HA Model number Serial number CVS-21HA.rev.03...
Page 3: Features
The CVS-21HA controls two stages of variable speed fans as well as two stages of either constant speed fans or heating units. The main features of the controller are as follows: A THREE DIGIT DISPLAY allows you to specify temperatures to within one tenth of a degree (Celsius or Fahrenheit).
Page 4 When used in combination with a WR-F-1A controller, the CVS-21HA COORDINATES THE MOVEMENT OF THE AIR INLETS WITH THE OPERATION OF THE FANS. This allows the air inlets to be adjusted correctly, free of the influence of noncontrollable factors such as wind or air from adjoining rooms.
Page 5: Precautions
The room temperature where the controller is installed MUST ALWAYS REMAIN BETWEEN 32° ET 104°F (0° ET 40°C). To avoid exposing the controller to harmful gases or excessive humidity, it is preferable to install it in a corridor. DO NOT SPRAY WATER ON THE CONTROLLER CVS-21HA.rev.03...
Page 6: Location Of The Controls
LO CATIO N O F THE CO NTR OLS C o ver Interna l circuit CVS-21HA.rev.03...
Page 7 Use this selection knob to select a parameter. PUSH-BUTTON Use this push-button to select a motor curve and to view or set the points of the temperature and minimum speed curves. ADJUSTMENT KNOB Use this adjustment knob to adjust the value of the selected parameter. CVS-21HA.rev.03...
Page 8 Degrees Celsius TEMPERATURE UNITS Degrees Fahrenheit Activated probe PROBE # 2 Deactivated probe Activated probe PROBE # 3 Deactivated probe Activated probe PROBE # 4 Deactivated probe Stage 3 used for heating COOLING OR HEATING Stage 3 used for cooling CVS-21HA.rev.03...
Page 9: Installation
For an alarm of the second type, use the NC terminal. ALL WIRING MUST BE DONE BY AN AUTHORIZED ELECTRICIAN AND MUST COMPLY WITH APPLICABLE CODES , LAWS AND REGULATIONS. BE SURE POWER IS OFF BEFORE DOING ANY WIRING TO AVOID ELECTRICAL SHOCK AND EQUIPMENT DAMAGE. CVS-21HA.rev.03...
Page 10 Switch # 3 activates terminal # 2. Switch # 4 activates terminal # 3. Switch # 5 activates terminal # 4. FACTORY SETTING: When the controller is shipped from the factory, switches # 3, 4 and 5 are set to OFF (probes are deactivated). CVS-21HA.rev.03...
Page 11 If the probe is defective, the word "PR#" and the letter "P" will alternately appear on the display. SELECTING THE OPERATING MODE FOR STAGE 3 Stage 3 can be used for cooling or heating. CVS-21HA.rev.03...
Page 12 Set the parameter selection knob to BANDWIDTH/M.C.-STAGE 1. The stage 1 band width appears flashing on the display. Press the push-button. The currently selected curve number appears flashing on the display. Turn the adjustment knob to adjust the curve number to the desired value. CVS-21HA.rev.03...
Page 13: Using The Controller
Temperatures can be displayed in degrees Celsius or Fahrenheit. Set switch # 2 to the desired position: : degrees Celsius. OFF : degrees Fahrenheit. FACTORY SETTING: When the controller is shipped from the factory, switch # 2 is set to OFF (temperatures are displayed in degrees Fahrenheit). CVS-21HA.rev.03...
Page 14: How To View And Reset Temperatures
Turn the adjustment knob clockwise by one notch. The minimum temperature appears flashing on the display. Turn the adjustment knob clockwise one notch further. The maximum temperature appears flashing on the display. Turn the adjustment knob clockwise a third notch. The room temperature again appears on the display. CVS-21HA.rev.03...
Page 15: To Reset The Minimum And Maximum Temperatures
10 second delay. PARAMETER DESCRIPTIONS SET POINT / TEMPERATURE CURVE The controller maintains a specified target room temperature by controlling the operation of the fans and heating units. The target room temperature can be specified in two ways: CVS-21HA.rev.03...
Page 16 STAGE 1 (VARIABLE SPEED FANS) Minimum ventilation cycle : When ventilation is not required for a cooling purpose, the stage 1 fans operate according to the minimum ventilation cycle. TIME ON STAGE 1 STAGE 1 — MIN. SPEED TIME OFF STAGE 1 CVS-21HA.rev.03...
Page 17 When the minimum speed curve is activated, the controller adjusts the stage 1 minimum speed every hour in a linear fashion between two consecutive points. CVS-21HA.rev.03...
Page 18 For example: TEMPERATURE CURVE MINIMUM SPEED CURVE d5 to d9 (adjustable) POINT d10 (not adjustable) POINT CVS-21HA.rev.03...
Page 19 Bandwidth [°F or °C] - The stage 1 bandwidth is the variation in the room temperature between the moment the stage 1 fans run at minimum speed and the moment they reach full speed. CVS-21HA.rev.03...
Page 20 3 heating units turn off. When the heater offset is activated, it can be adjusted to a positive or negative value. When the heater offset is deacti- vated, it can be adjusted only to a positive value. CVS-21HA.rev.03...
Page 21: Parameter Factory Settings
3.0°F (1.7°C) 40 % Minimum speed 2.0°F (1.1°C) Bandwidth STAGE 2 De-icing Cycle Time 1 minute 0 seconds De-icing Time On Differential 2.0°F (1.1°C) STAGE 3 Heater offset 0.5°F (0.3°C) 12.0°F (6.7°C) High offset ALARM 10.0°F (5.6°C) Low offset CVS-21HA.rev.03...
Page 22: How To Adjust The Parameters
Turn the adjustment knob to adjust the set point to the desired value. To adjust the points of the temperature curve: Set the parameter selection knob to SET POINT / T° CURVE. The current set point appears flashing on the display. CVS-21HA.rev.03...
Page 23 Turn the adjustment knob clockwise by one notch and leave it in this position. The word ON appears flashing on the display and after 10 seconds, the temperature curve pilot light turns on indicating that the temperature curve is now activated. CVS-21HA.rev.03...
Page 24 To adjust the single minimum speed: Set the parameter selection knob to MIN.SPEED / CURVE. The current minimum speed appears flashing on the display. Turn the adjustment knob to adjust the minimum speed to the de- sired value. CVS-21HA.rev.03...
Page 25 Activate the minimum speed curve as follows: Press the push-button once again.The word OFF appears flashing on the display. Turn the adjustment knob clockwise by one notch. The word ON appears flashing on the display, indicating that the minimum speed curve is now activated. CVS-21HA.rev.03...
Page 26 H E ATE R O F FSE T be adjusted only to a positive value. Activate or deactivate the heater offset as follows: Set the parameter selection knob to HEATER OFFSET. The current heater offset appears flashing on the display. CVS-21HA.rev.03...
Page 27 Turn the adjustment knob to adjust the heater offset to the desired value. OTHER PARAMETERS To adjust all other parameters: Set the parameter selection knob to the desired position. Turn the adjustment knob to adjust the parameter to the de- sired value. CVS-21HA.rev.03...
Page 28: Parameter Adjustment Ranges
De-icing Cycle Time 1 to 720 minutes De-icing Time On 0 to 900 seconds Heater offset -9.9 and 20.0°F (-5.5 and 11.1°C) activated STAGE 3 0.0 and 20.0°F ( 0.0 and 11.1°C) deactivated 0.5 and 20.0°F (0.3 and 11.1°C) Differential CVS-21HA.rev.03...
Page 29: Alarms
The low offset can be adjusted between 0.5 and 40.0 F (0.3° and 22.0°C). POWER FAILURE OR FAULT IN THE SUPPLY CIRCUIT The controller activates the alarm in the event of a power failure or a fault in the supply circuit. CVS-21HA.rev.03...
Page 30: How To Lock The Parameters
To lock the parameters: Set switch # 1 to ON. To unlock the parameters: Set switch # 1 to OFF. FACTORY SETTING : When the controller is shipped from the factory, switch # 1 is set to OFF (the parameters are unlocked). CVS-21HA.rev.03...
Page 31: How The Controller Operates
• At POINT 2: the stage 1 fans reach full speed. • At POINT 3: the stage 2 fans start to run at minimum speed and increase in speed as the room temperature rises. CVS-21HA.rev.03...
Page 32 At POINT 2: the stage 1 fans start to decrease in speed. • At POINT 1: the stage 1 fans reach minimum spped. • When room temperature < set point, the stage 1 fans operate ac- cording to the minimum ventilation cycle at minimum speed. CVS-21HA.rev.03...
Page 33 When negative, stage 3 may operate at room temperatures above the set point. If the room temperature falls: • At POINT 1: the stage 3 heating units turn on. If the room temperature rises: • At POINT 2: the stage 3 heating units turn off. CVS-21HA.rev.03...
Page 34: Troubleshooting
There is electrical noise near the cable of an extended probe. Do not run probe cables next to other power cables. When crossing over other power cables, cross at 90°. CVS-21HA.rev.03...
Page 35 Select an appropriate motor curve. The stage 1 bandwidth is too low. Adjust the bandwidth to a higher value. The stage 1 time on or time off is too short. Adjust the time on or time off to a higher value. CVS-21HA.rev.03...
Page 36 The controller is defective. Listen to see if there is a clicking sound when the stage's pilot light turns on. If there is no clicking sound, contact your distributor to get the controller repaired. CVS-21HA.rev.03...
Page 37: Technical Specifications
-40° to 120°F (-40° to 49°C). Accuracy: 1.8 F (1 C) between 41 and 95 F (5 and 35 Enclosure: ABS, moisture and dust-tight. The temperature where the controller is installed MUST AT ALL TIMES REMAIN BETWEEN 32 AND 104 F (0 and 40 CVS-21HA.rev.03...
Page 38 CVS-21HA.rev.03...