DVS-25HA
Tem perature Controller
DVS-25HA
User's G uide
SET
R ead this guide carefully before using the controller.
TABLE OF CONTENTS
Page
PRECAUTIONS .............................................................. 3
FEATURES ..................................................................... 4
LOCATION OF THE CONTROLS ................................... 6
Controller Status Leds ................................................... 6
Internal Switches ........................................................... 7
INSTALLATION .............................................................. 8
Mounting Instructions ..................................................... 8
Connections .................................................................. 8
Motor Types .................................................................. 9
Heating/Cooling Option ................................................. 10
Temperature Probes ..................................................... 11
CHANGING THE PARAMETER SETTINGS .................. 14
Using the Display .......................................................... 14
Locking the Parameters Settings .................................. 15
TEMPERATURE SETTINGS .......................................... 16
Temperature Units ........................................................ 16
Viewing Temperatures .................................................. 16
Temperature Set Point .................................................. 19
Temperature Curve ....................................................... 20
VENTILATION SETTINGS .............................................. 24
Cooling Operation ......................................................... 24
Minimum Ventilation Cycle ............................................ 27
Using Stage 2 Fans for Minimum Ventilation ................. 29
Humidity Compensation ................................................ 31
Minimum Speed Curve.................................................. 34
Outside Temp. Compensation on Stage 1 Bandwidth ... 40
Ventilation Settings ....................................................... 41
Merging Stage 1 and 2 Fans ......................................... 45
Mist Cooling .................................................................. 46
HEATER SETTINGS....................................................... 49
Humidity Compensation ................................................ 54
ALARM SETTINGS ......................................................... 57
TROUBLESHOOTING GUIDE........................................ 59
TECHNICAL SPECIFICATIONS .................................... 64
FACTORY SETTINGS .................................................... 65
FUNCTION SUMMARY .................................................. 67
2
DVS-25HA.rev.06
PRECAUTIONS
We strongly recommend installing supplementary natural
ventilation as well as a back-up thermostat on at least one
cooling stage (refer to the wiring diagram enclosed with this
user's manual to connect the thermostat).
Although fuses at the input and outputs of the controller protect
its circuits in case of an overload or overvoltage, we
recommend installing an additional protection device on the
controller's supply circuit.
The room temperature where the controller is located MUST
ALWAYS REMAIN BETWEEN 32°F AND 104°F (0°C TO 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
FOR CUSTOMER USE
Enter the serial number located on
the side of the controller below for
future reference.
Model number: DVS-25HA
Serial number:
DVS-25HA.rev.06
3
FEATURES
The DVS-25HA is an electronic device used for environmental control in
livestock buildings. It allows the user to maintain a specified target temperature by controlling the operation of ventilation and heating equipment.
Two stages of variable speed fans can be connected to the controller, as
well as three stages of constant-speed fans and two stages of either constant-speed fans or heating units. In addition, one of the constant-speed fan
stages can be configured as a mist cooling stage.
The main features of the DVS-25HA are as follows:
THREE-DIGIT DISPLAY: A three-digit display provides a high level of accuracy, allowing the user to specify a temperature to within one tenth of a
degree (in Fahrenheit or Celsius units).
PILOT LIGHTS: Pilot lights indicating the state of outputs allow the user to
monitor the operation of the system without having to enter the building.
MINIMUM VENTILATION CYCLE: When ventilation is not required for cooling, the first and second stage fans can be operated either continuously or
intermittently to reduce the level of humidity and supply oxygen to the room.
TEMPERATURE AND MINIMUM VENTILATION SPEED CURVES: The
controller can be set to automatically change the temperature set point and
the minimum ventilation speed over a given period of time in accordance
with the user's requirements by specifying a temperature curve and a minimum ventilation speed curve with up to six different points each.
CHOICE OF TEN MOTOR TYPES: The variation in motor speed resulting
from a change in voltage will depend on the make and capacity of the motor.
In order to achieve a high degree of compatibility between controller and
motor, the user can choose from among ten different motor types, thus
ensuring that the correct voltage is supplied.
MERGING OF STAGE 1 AND 2 FANS: Merging can be applied to smooth
the transition between the operation of Stage 1 and 2 fans.
ZONED OR CASCADING HEATERS
HIGH/LOW TEMPERATURE ALARM OUTPUT
4
DVS-25HA.rev.06
DVS-25HA
HUMIDITY COMPENSATION: The stage 1 minimum speed can be adjusted automatically as a function of relative humidity. As humidity increases,
the minimum speed of stage 1 fans increases proportionally to compensate
for the change. An alternative method uses Heater 1 to compensate for high
humidity levels.
FULL-SPEED FAN START-UP: In order to overcome the inertia of the ventilation system components and de-ice the fan blades in cold weather conditions, the controller supplies maximum voltage to the variable speed fans
during the 2 seconds immediately following each start-up.
OUTSIDE TEMPERATURE COMPENSATION OF STAGE 1 BANDWIDTH:
If an INTERFACE-3 is connected to the DVS-25HA, a compensation is applied to the Stage 1 bandwidth in cold weather conditions to allow for momentary increases in room temperature.
FOUR INDEPENDENT TEMPERATURE PROBE INPUTS: Up to four temperature probes can be connected to the controller in order to obtain a more
accurate reading of the average room temperature and a faster reaction
time.
OVERLOAD AND OVERVOLTAGE PROTECTION: Fuses are installed at
the input and outputs of the controller to protect its circuitry in the case of an
overload or overvoltage.
COMPUTER CONTROL: The controller can be connected to a computer,
thus making it possible to centralize the management of information and
diversify control strategies.
CONTROL OF AIR INLET MOVEMENT: If the DVS-25HA is used in combination with a WR-F-1AB controller, the movement of the air inlets can be
coordinated with the operation of the fans using a potentiometer located on
the panel drive. This allows the air inlets to be adjusted correctly, without
the influence of uncontrollable factors such as wind or air from adjoining
rooms.
TEST MODE: A test mode allows you to simulate temperature changes
and verify controller performance.
DVS-25HA.rev.06
5
LOCATION OF THE CONTROLS
A dju stm en t K nob
D ig ital D is p la y
S tatu s
P ilot
L igh ts
B utto n
SET
Fu nction S ele ctor
CONTROLLER STATUS LEDS
LED
ME AN IN G
S TAGE S 1-2
F L A S H E S W H E N S TA G E 1 F A N S A R E O N A N D S TA YS O N W H E N
S TA G E 2 F A N S A R E O N .
S TAGE S 3-4
F L A S H E S W H E N S TA G E 3 F A N S A R E O N A N D S TA YS O N W H E N
S TA G E 4 F A N S A R E O N .
S TAGE 5
TU R N S O N W H E N S TA G E 5 F A N S A R E O N .
S TAGE 6 /
H E AT E R 2
TU R N S O N W H E N S T A G E 6 F A N S O R H E A T IN G U N IT S A R E O N .
S TAGE 7 /
H E AT E R 1
TU R N S O N W H E N S T A G E 7 F A N S O R H E A T IN G U N IT S A R E O N .
o
T / M I N . S P.
CURVE
F L A S H E S W H E N TH E TE M P E R A TU R E C U R V E IS A C TIV A TE D . TU R N S
O N W H E N TH E M IN IM U M V E N TIL A TIO N S P E E D C U R V E IS A L S O O N .
D E F. P R O B E /
ALARM
TU R N S O N W H E N A N A L A R M IS D E T E C T E D .
D E F E C TIV E P R O B E IS D E TE C TE D
C O M P E N S AT I O N
TU R N S O N W H E N T H E S TA G E 1 M IN IM U M S P E E D IS
C O M P E N S A TE D , W H E N H E A TE R 1 IS B E IN G U S E D TO
C O M P E N S A TE F O R H U M ID ITY O R W H E N TH E C O M P E N S ATIO N O N
T H E M I S T S T A G E I S I N E F F E C T.
6
DVS-25HA.rev.06
B L IN K S W H E N A
DVS-25HA
ON
INTERNAL SWITCHES
1
2
3
4
5
6
7
8
9 10 11 12
The internal switches are located on the inside of the front cover. When the
controller is shipped from the factory, all the switches are set to OFF.
#
OFF
ON
1
UNLOC KED PARAMETERS
LOC KED PARAMETERS
2
FAHRENHEIT D EGREES
C ELSIUS D EGREES
3
PROBE 2 D ISABLED
PROBE 2 ENABLED
4
PROBE 3 D ISABLED
PROBE 3 ENABLED
5
PROBE 4 D ISABLED
PROBE 4 ENABLED
6
NO HEATING STAGES
HEATING
7
1 HEATER
2 HEATERS
8
C ASC AD ING HEATERS
ZONED HEATERS
9
MIST OFF
MIST ON
10
D O NOT MERGE STAGES 1-2
MERGE STAGES 1-2
11
HUMID ITY C OMPENSATION
ON STAGE 1 MIN. SPEED
HUMID ITY C OMPENSATION
USING HEATER 1
12
D EAC TIVATE TEMP. D IFFERENC E
BETWEEN HEATER ZONES
PROTEC TION
AC TIVATE TEMP. D IFFERENC E
BETWEEN HEATER ZONES
PROTEC TION
DVS-25HA.rev.06
7
INSTALLATION
MOUNTING INSTRUCTIONS
Open the latch and lift the cover. Remove the black caps located on each of
the four mounting holes. Mount the enclosure to the wall using four screws.
Insert the screws into the mounting holes and tighten. Fasten the black
caps onto the mounting holes.
CONNECTIONS
To connect the controller, refer to the wiring diagram enclosed with this user's
manual.
n
Set the voltage switch to the appropriate voltage.
n
Use the electrical knockouts provided at the bottom of the enclosure.
Do not make additional holes in the enclosure, particularly on the side
of the enclosure when using a computer communications module.
n
If Stage 6 or 7 is used for heating, it may be necessary to install a
transformer in order to supply the appropriate voltage to the heating unit.
ALARM CONNECTION: There are two types of alarms on the market. One
type activates when current is cut off at its input, whereas the other activates
when current is supplied at its input. For an alarm of the first type, use the NO
terminal as shown on the wiring diagram. For an alarm of the second type, use
the NC terminal.
!
WARNING
8
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 SHOCKS AND EQUIPMENT DAMAGE.
DVS-25HA.rev.06
DVS-25HA
MOTOR TYPES
The relationship between the voltage supplied to a motor and its operating
speed is described by a motor curve. This curve varies with the make and
capacity of the motor. The various motors available in the industry have been
divided into ten categories and the controller has been programmed with a
different motor curve for each of these categories. To ensure that the
controller supplies the correct voltages, an appropriate curve must be
selected for Stage 1 and Stage 2 according to the type of fan motors used.
1
Selecting a Motor Type for Stage 1
Refer to the list of motors enclosed with this user's manual to determine which
type number (1 to 10) is appropriate for the motors used.
n
Set the selection knob to
STAGE 1 — BANDWIDTH/
TIMER. The Stage 1 bandwidth is
displayed and flashes.
n
Press the push-button three times.
The currently selected motor type
is displayed, alternating with the
letters "tYP".
n
Use the adjustment knob to adjust the motor type to the desired value.
n
Return to the Stage 1 bandwidth display by pressing the push-button
once again.
2
Selecting A Motor Type for Stage 2
Refer to the list of motors enclosed with this user's manual to determine which
type (1 to 10) is appropriate for the motors used.
DVS-25HA.rev.06
9
DVS-25HA
n
Set the selection knob to STAGE 2 — OFFSET/BANDWIDTH.
The offset is displayed, alternating with the letters "OFT".
n
Press the push-button twice. The currently selected motor type
flashes.
n
Use the adjustment knob to adjust the motor type to the desired
value.
n
Return to the Stage 2 offset display by pressing the push-button
once again.
HEATING / COOLING OPTION
Stages 6 and 7 can operate as heating or cooling stages.
ð Set switches # 6 and # 7 to OFF to
use both stages for cooling.
ON
ð Set switch # 6 to ON and switch # 7
to OFF to use Stage 7 for heating and
Stage 6 for cooling.
ð Set switches # 6 and # 7 to ON to
6
use both stages for heating.
Note that if only one stage is used for heating, it must be Stage 7.
10
DVS-25HA.rev.06
7
DVS-25HA
TEMPERATURE PROBES
1
Connecting the Probes
The controller is supplied with one temperature probe connected to input
# 1. Up to three additional probes can be connected to the controller in order
to obtain a more accurate reading of the average room temperature and a
faster reaction time.
n
Use inputs # 2, 3 and 4 to connect additional probes, as shown on the
wiring diagram enclosed.
CAUTION: Probes operate at low voltage and are isolated from the supply.
Be sure that probe cables remain isolated from all high voltage sources. In
particular, do not route the probe cables through the same electrical knockout
as other cables. Do not connect the shield from the probe cable to a terminal
or a ground.
Switches are used to activate or deactivate the additional probes connected
to the controller.
ON
n
Activate each additional probe by setting
the appropriate switch to ON:
3
4
5
• Switch # 3 activates the probe connected to input # 2.
• Switch # 4 activates the probe connected to input # 3.
• Switch # 5 activates the probe connected to input # 4.
DVS-25HA.rev.06
11
DVS-25HA
2
Extending the Probes
Each probe can be extended up to 500 feet (150 meters). To extend a probe:
n
Use a shielded cable of outside diameter between 0.245 and 0.260 in
(6.22 and 6.60 mm) (the cable dimensions should not be under 18
AWG) to ensure the cable entry is liquid tight. Do not ground the
shielding.
n
It is preferable to solder the cable joint to ensure a proper contact
between the two cables.
CAUTION: Do not run probe cables next to other power cables. When
crossing over other cables, cross at 90°.
3
Defective Probes
If a defective probe is detected, the Defective Probe Pilot Light turns on. The
room temperature shown on the display is then the average temperature
measured by the probes in working condition. The controller will operate
according to this temperature.
To identify the defective probe:
n
Set the selection knob to ROOM
TEMPERATURE . The room temperature is displayed.
n
Press the push-button. If the probe connected to input # 1 and supplied with the controller is not defective, the letters"PR1" are displayed, alternating with the on/off state of the probe and the temperature measured by the probe. If the probe is defective, the letters
"PR1" are displayed, alternating with the state of the probe and the
letter "P".
For each additional probe connected to the controller:
12
DVS-25HA.rev.06
DVS-25HA
n
Press the push-button once again. If the probe is not defective, the
letters "PR#" (where # is the number of the input to which the probe is
connected) are displayed, alternating with the on/off state of the probe
and the temperature measured by the probe. If the probe is defective,
the letters "PR#" are displayed, alternating with the on/off state of the
probe and the letter "P".
DVS-25HA.rev.06
13
CHANGING THE PARAMETER SETTINGS
USING THE DISPLAY
Flashing Values: The display will flash in certain cases
and not in others. The flashing indicates that the value
shown can be adjusted. A
value that is not flashing cannot be adjusted.
78.0
Relative and Absolute Values: Some parameter adjustments are displayed
both as a relative value and an absolute temperature. This applies to all heating
and cooling differentials, the mist differential and the heater offset. The
parameter is first displayed as a relative value. The corresponding absolute
temperature is displayed after six seconds if no action is taken by the user.
The absolute value is the temperature at which the stage turns on (except in
the case of the heater and mist offsets where the value displayed is the
temperature at which the stage turns off). If the user turns the adjustment
knob, the relative value reappears. For example, when the user turns the
selection knob to a differential position, i.e. STAGES 3-7—DIFFERENTIAL,
the sequence is as follows:
(i) The current differential for stage 3 flashes on the display, alternating with
"St. 3".
St. 3
2.0
(ii) If, after about 6 seconds, no action is taken by the user, the absolute
temperature value is displayed, alternating with "St. 3". In this case, the
absolute value is: Set Point + Bandwidth 1 + Offset 2 + Bandwidth 2 +
Differential 3.
14
DVS-25HA.rev.06
DVS-25HA
St. 3
78.0
(iii) When the user turns the adjustment knob to make an adjustment to the
stage 3 differential, the relative value reappears on the display.
2.3
In the case of the mist and heating units, the starting temperature is displayed
with the letters "STr" when adjusting the differential and the stopping
temperature is displayed with the letters "STP" when adjusting the offset.
LOCKING THE PARAMETER SETTINGS
The parameter settings can be locked to prevent accidentally modifying
them. When the settings are locked, only the temperature set point and the
Stage 1 minimum ventilation speed can be modified (as long as the temperature curve and the minimum ventilation speed curve are deactivated
respectively).
To lock the parameter settings:
n
Set internal switch # 1 to ON.
To unlock the parameter settings:
n
Set internal switch # 1 to OFF.
DVS-25HA.rev.06
15
TEMPERATURE SETTINGS
TEMPERATURE UNITS
Temperatures can be displayed in either Celsius or
Fahrenheit units
n
ON
Set internal switch # 2 to the desired position:
• ON to display temperatures in Celsius units.
• OFF to display temperatures in Fahrenheit units.
2
VIEWING TEMPERATURES
To display the desired temperature,
set the selection knob to ROOM
TEMPERATURE. The readout can
display values from -40.0oF to 120.0oF
( -40.0oC to 48.9oC).
1
Viewing Room Temperature
The room temperature is the average value of all temperatures measured by
activated probes in proper operating condition.
n
2
Set the selection knob to ROOM TEMPERATURE. The room temperature is displayed.
Viewing Probe Temperatures
The controller can display probe temperatures individually. Probes can also
be turned on or off to control the temperature in different parts of the building.
n
16
Set selection knob to ROOM TEMPERATURE. The average room
temperature is displayed.
DVS-25HA.rev.06
DVS-25HA
n
Press the push-button. The temperature reading from probe 1 is displayed, alternating with the letters "Pr 1" and the on/off state of probe
1.
n
For each additional probe, press the push-button. The temperature
reading from probe x is displayed, alternating with the letters "Pr x"
and the on/off state of the probe, etc.
Note: The display returns to the average room temperature after one
minute.
3
Viewing Minimum / Maximum Temperatures
The minimum and maximum temperatures are the lowest and highest temperature values recorded since the last reset. Maximum and minimum
temperature values are recorded for the average room temperature as well
as for individual probe temperatures.
n
Set the selection knob to ROOM TEMPERATURE. The room temperature is displayed.
n
Turn the adjustment knob clockwise by one notch. The minimum
temperature is displayed, alternating with the letters "Lo".
n
Turn the adjustment knob clockwise one notch further. The maximum
temperature is displayed, alternating with the letters "Hi".
n
Turn the adjustment knob clockwise a third notch. The room temperature is displayed again.
n
For each individual probe, press the push-button. The temperature reading from probe x is displayed, alternating with the letters "Pr x" and the
on/off state of the probe.
n
Turn the adjustment knob clockwise by one notch. The minimum temperature is displayed, alternating with the letters "Lo".
DVS-25HA.rev.06
17
DVS-25HA
n
Turn the adjustment knob clockwise one notch further. The maximum
temperature is displayed, alternating with the letters "Hi".
n
Turn the adjustment knob clockwise a third notch. The probe temperature is displayed again.
n
Press the push-button to access the other probes, etc.
NOTE: If you let the display flash for more than 10 seconds, the controller
resets the minimum and maximum temperatures currently in memory (the
display stops flashing to indicate that the reset has been done).
18
DVS-25HA.rev.06
DVS-25HA
TEMPERATURE SET POINT
The temperature set point is the target room temperature. It can be adjusted between -40.0°F and 99.9°F
(-40.0°C and 37.7°C).
Adjusting Temperature Set Point
n
Set the selection knob to SET POINT / To CURVE.The current set
point flashes on the display.
n
Use the adjustment knob to adjust the set point to the desired value.
NOTE: The temperature set point can be adjusted only if the temperature
curve is deactivated (see following section).
DVS-25HA.rev.06
19
DVS-25HA
TEMPERATURE CURVE
The user can define a temperature curve to adjust the set point automatically
over a given time period.
○
○
○
○
○
○
○
○
○
○
○
○
○
○
d35
○
○
d50
d70
○
○
○
○
○
○
○
○
○
○
d25
○
○
○
○
○
○
○
○
d4
○
○
○
○
○
○
○
T o1
T o2
T o3
T o4
T o5
T o6
○
Temperature
d80 Days
A curve is defined using six points. Each point specifies a day number and
a set point for that day. Once the points of the curve are defined, the curve
must be activated. The controller will change the temperature set point every
hour in a linear fashion between consecutive points of the curve. When the
last point of the curve is reached, the temperature set point for that day is
maintained until the curve is reactivated.
NOTES:
i) All six points of the curve must be specified. If six points are not needed,
repeat the last temperature value for each unnecessary point.
ii) Certain restrictions apply to reduce the risk of errors:
− The highest possible day number is 99.
− Decreasing day numbers are not allowed.
− Increasing temperatures are not allowed.
− The temperature variation cannot exceed 3°F (1.6°C) per day.
20
DVS-25HA.rev.06
DVS-25HA
1
Specifying the Curve
n
Set the selection knob to SET
POINT / To CURVE. The current temperature set point
flashes on the display.
n
Press the push-button. The word OFF is displayed indicating that the
termperature curve is deactivated. If this is not the case, see below
to deactivate the curve.
Repeat the following steps for each of the six points:
n
Press the push-button once again. The day number is displayed,
alternating with the word "day".
n
Using the adjustment knob, set the day number to the desired value.
n
Press the push-button once again. The current temperature set point
is displayed, alternating with the word "set".
n
Using the adjustment knob, adjust the set point to the desired value.
Once the six points of the curve have been specified, activate the curve as
explained below.
NOTE: Make sure the temperature curve is deactivated before specifying
new points (see below).
DVS-25HA.rev.06
21
DVS-25HA
2
Activating Temperature Curve
If you have just finished specifying the points on the curve:
n
Press the push-button once again. The word OFF flashes on the
display.
n
Turn the adjustment knob clockwise one notch. The word ON flashes
on the display and the Temperature Curve Pilot Light flashes, indicating that the temperature curve is now activated.
n
Set the selection knob to ROOM TEMPERATURE.
If you have previously defined the points on the curve:
n
Set the selection knob to SET POINT / To CURVE. The current
value of the temperature set point flashes on the display.
n
Press the push-button. The word OFF is displayed.
n
Press the push-button to display the points of the curve currently
defined until the word OFF appears (thirteen clicks).
n
Turn the adjustment knob clockwise one notch. The word ON flashes
on the display and the Temperature Curve Pilot Light flashes, indicating that the temperature curve is now activated.
n
Set the selection knob to ROOM TEMPERATURE.
22
DVS-25HA.rev.06
DVS-25HA
3
Viewing Current Set Point and Day Number
When the temperature curve is activated, the current temperature set
point and day number can be viewed at any time. The current day number can also be adjusted in order to move forward or backward on the
temperature curve.
n
Set the selection knob to SET POINT / To CURVE. The current
temperature set point is displayed.
n
Press the push-button. The current day number is displayed,
alternating with the letters "cur. day".
n
Use the adjustment knob to set the day number to the desired value.
4
Deactivating Temperature Curve
n
Set the selection knob to SET POINT / To CURVE. The current
temperature set point is displayed.
n
Press the push-button to display the points of the curve actually
defined until the word ON appears (fourteen clicks).
n
Turn the adjustment knob counterclockwise one notch. The word
OFF flashes on the display and the Temperature Curve Pilot Light
turns off indicating that the temperature curve is now deactivated.
n
Set the selection knob to ROOM TEMPERATURE.
DVS-25HA.rev.06
23
VENTILATION SETTINGS
COOLING OPERATION
The DVS-25HA controls two stages of variable-speed fans (Stage 1 - 2),
three stages of constant-speed fans (Stage 3 - 5) and two optional stages of
constant-speed fans (Stages 6 & 7).
STAGE 7
STAGE 6
STAGE 5
STAGE 4
STAGE 3
STAGE 2
STAGE 1
Minimum
Ventilation
Cycle
Stage 2
Offset
Bandwidth
Stage 2
Differential Differential Differential Differential Differential Room
Stage 4
Stage 3
Stage 5
Stage 6
Stage 7 Temp.
FIGURE 1: COOLING OPERATION
Bandwidth
Stage 1
Temperature
Set Point
DVS-25HA.rev.06
24
DVS-25HA
If room temperature rises:
• When room temperature < Set Point, stage 1 fans run at minimum
speed according to the minimum ventilation cycle. If minimum ventilation
has been activated for stage 2, stage 2 fans also provide minimum
ventilation.
• At Set Point: stage 1 fans stop operating according to the minimum
ventilation cycle and increase in speed as the room temperature rises.
• At Set Point + Bandwidth 1: stage 1 fans reach full speed.
• At Set Point + Bandwidth 1 + Stage 2 Offset: stage 2 fans start running
continuously.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2: stage 2 fans
reach full speed.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3:
stage 3 fans start running.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4: stage 4 fans start running.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4 + Diff. 5: stage 5 fans start running.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4 + Diff. 5 + Diff. 6: stage 6 fans start running.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4 + Diff. 5 + Diff. 6 + Diff. 7: stage 7 fans start running.
DVS-25HA.rev.06
25
DVS-25HA
If the room temperature falls:
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4 + Diff. 5 + Diff. 6: stage 7 fans return to a stop.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4 + Diff. 5: stage 6 fans return to a stop.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3 +
Diff. 4: stage 5 fans return to a stop.
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2 + Diff. 3:
stage 4 fans return to a stop;
• At Set Point + Bandwidth 1 + Stage 2 Offset + Bandwidth 2: stage 3 fans
return to a stop; stage 2 fans start decreasing in speed as the temperature decreases.
• At Set Point + Bandwidth 1 + Stage 2 Offset: if minimum ventilation has
been activated for stage 2, stage 2 fans run according to the minimum
ventilation cycle; otherwise, stage 2 fans return to a stop.
• At Set Point + Bandwidth 1: Stage 1 fans start decreasing in speed as the
temperature decreases.
• At Set Point: Stage 1 fans reach minimum speed.
• Below the Set Point: stage 1 fans stop operating continuously and operate according to the minimum ventilation cycle at minimum speed. If
minimum ventilation has been activated for stage 2, stage 2 fans also
provide minimum ventilation.
26
DVS-25HA.rev.06
DVS-25HA
MINIMUM VENTILATION CYCLE
When the room temperature is below the set point, the Stage 1 fans operate
according to the minimum ventilation cycle. Running the fans even though
ventilation is not required for a cooling purpose is useful to reduce humidity
levels and supply oxygen to the room. It also prevents the fans from freezing
in winter.
TIME ON
STAGE 1
STAGE 1 — MIN. SPEED
OFF
TIME OFF
STAGE 1
During time on, the Stage 1 fans run at Stage 1 minimum speed. The Stage
1 Pilot Light turns on. During time off, the Stage 1 fans do not run. The Stage
1 Pilot Light turns off. The Stage 1 minimum speed can also be defined by
a speed curve (see below).
NOTE: The controller supplies maximum voltage to the variable-speed fans
for 2 seconds immediately following each start-up.
Minimum Ventilation Cycle Settings
1. To run the fans continuously at minimum speed, set time off to zero and
time on to any value other than zero.
2. To stop the fans, set time on to zero and time off to any value.
3. To run the fans intermittently, set time on to the desired running time
and time off to the desired off time.
DVS-25HA.rev.06
27
DVS-25HA
1
Adjusting Stage 1 Minimum Speed
The minimum speed can be adjusted between 10 and 100% of the full speed
of the fans.
n
Set the selection knob to
STAGE 1 — MIN. SPEED/
CURVE. The current minimum
speed for Stage 1 flashes on
the display.
n
Use the adjustment knob to adjust the minimum speed to the
desired value.
NOTE: The minimum speed can be adjusted only if the minimum speed
curve is deactivated or if the minimum speed curve is activated but not
currently operating (see below).
2
Adjusting Stage 1 Time On and Time Off
Time on and Time Off can be adjusted between 0 and 900 seconds, in
increments of 15 seconds.
n
Set the selection knob to STAGE 1 — BANDWIDTH/TIMER. The
current bandwidth for Stage 1 flashes on the display.
n
Press the push-button. The current time on for Stage 1 flashes on the
display, alternating with the letters "On".
n
Use the adjustment knob to adjust time on to the desired value.
n
Press the push-button. The current time off for Stage 1 flashes on the
display, alternating with the letters "Off".
n
Use the adjustment knob to adjust time off to the desired value.
28
DVS-25HA.rev.06
DVS-25HA
USING STAGE 2 FANS FOR MINIMUM VENTILATION
Stage 2 fans can provide minimum ventilation whenever they are not
needed for cooling purposes, i.e. when the room temperature is less than
Set Point + Stage 1 Bandwidth + Stage 2 Offset. In this case, Stage 2
fans operate according to their own minimum ventilation cycle. This
feature is activated by setting the Stage 2 Time On value to a value other
than zero. Figure 2 below sums up the operation of stage 1 and 2 fans:
STAGE 2
FULL
STAGE 2
MINIMUM
STAGE 1
FULL
STAGE 1
MINIMUM
Bandwidth
Stage 1
Offset
Stage 2
Bandwidth
Stage 2
Room
Temp.
Temperature
Set Point
Figure 2: Stage 1 and 2 Operation showing Minimum Ventilation
DVS-25HA.rev.06
29
DVS-25HA
Adjusting Stage 2 Time On and Time Off
To activate minimum ventilation for Stage 2 fans, set Time On to a value
other than zero. Time on and Time Off can be adjusted between 0 and 900
seconds, in increments of 15 seconds.
n
Set the selection knob to STAGE 2— MIN. SPEED. The current
minimum speed for Stage 2 flashes on the display.
n
Press the push-button. The current time on for Stage 2 flashes on the
display, alternating with the letters "On".
n
Use the adjustment knob to adjust time on to the desired value.
n
Press the push-button. The current time off for Stage 2 flashes on the
display, alternating with the letters "Off".
n
Use the adjustment knob to adjust time off to the desired value.
30
DVS-25HA.rev.06
DVS-25HA
HUMIDITY COMPENSATION
The stage 1 minimum speed can be adjusted automatically as a function of
relative humidity. As humidity increases, the stage 1 minimum speed increases proportionally to compensate for the change. At humidity levels at
or below the humidity set point, stage 1 minimum speed is equal to the
normal uncompensated speed. The user specifies the percentage increase
in minimum speed for a relative humidity equal to the humidity set point +
10%. For example, if the minimum speed is 40% and the compensation
adjustment is 30%, the minimum speed will be adjusted to 70% of full
speed when the humidity rises 10% above the humidity set point. In addition to adjusting the minimum speed, the humidity compensation feature
also changes the operation of the minimum ventilation cycle: if the controller is operating in minimum ventilation mode when the relative humidity
exceeds the humidity set point, the minimum ventilation fans are operated
continuously rather than cycled. Humidity compensation is enabled by
setting internal switch # 11 to OFF. The alternative to using this feature is
to use Heater 1 to compensate for high levels of humidity (see Heater Settings — only one of the two compensation methods can be used).
Stage 1
Min. Speed
100%
Compensation begins
Compensation %
Normal
Min. Speed
10 %
0%
Relative Humidity
Set Point
Relative
Humidity
If the minimum ventilation speed curve is activated for Stage 1 fans, the
compensation applies to the current minimum speed calculated using the
curve. Humidity compensation also applies to the Stage 2 minimum speed
if minimum ventilation has been activated. Note that for the compensation
DVS-25HA.rev.06
31
DVS-25HA
to take place, the compensation feature must be activated by the user.
When a compensation is applied to the minimum speed, the compensation
pilot light turns on.
1
Viewing Relative Humidity
n
Set the selection knob to
STAGE 1 — HUMIDITY. The
current relative humidity is displayed.
n
Turn the adjustment knob clockwise by one notch. The minimum
humidity flashes on the display, alternating with the letters "Lo".
n
Turn the adjustment knob clockwise one notch further. The maximum
humidity flashes on the display, alternating with the letters "Hi".
n
Turn the adjustment knob clockwise a third notch. The current humidity value is displayed again.
NOTE: If you let the display flash for more than 10 seconds when the
maximum or minimum humidity is displayed, the controller resets the minimum and maximum humidity values currently in memory (the display stops
flashing to indicate that the reset has been done).
2
Activating / Deactivating Humidity Compensation
n
Set the selection knob to STAGE 1 — HUMIDITY. The current humidity
reading is displayed.
n
Press the push-button. The current on/off state of humidity compensation
flashes on the display.
n
Use the adjustment knob to adjust the on/off state to the desired value.
32
DVS-25HA.rev.06
DVS-25HA
3
Adjusting Relative Humidity Set Point
When the relative humidity exceeds the humidity set point, stage 1 minimum speed is increased by a proportional amount to compensate for the
increase in humidity. Note that the humidity compensation feature must be
activated for this to work.
n
Set the selection knob to STAGE 1 — HUMIDITY. The current humidity
reading is displayed.
n
Press the push-button twice. The relative humidity set point is
displayed, alternating with the letters "set rH".
n
Use the adjustment knob to adjust the set point to the desired value.
4
Adjusting Minimum Speed Compensation
This is the percentage increase in minimum speed for a relative humidity
equal to the humidity set point + 10%. The value ranges from 0 to 100%.
n
Set the selection knob to STAGE 1 — HUMIDITY . The current humidity
reading is displayed.
n
Press the push-button three times. The current minimum speed
compensation is displayed, alternating with the letters "SPd".
n
Use the adjustment knob to adjust the minimum speed compensation
to the desired value.
DVS-25HA.rev.06
33
DVS-25HA
MINIMUM VENTILATION SPEED CURVE
The user can define a minimum ventilation speed curve to adjust the
Stage 1 minimum speed automatically over a given time period. Each
curve is defined by six points. Each point specifies a day number and a
fan speed for that day. Once the points are defined, the minimum speed
curve must be activated. 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.
When the last point of the curve is reached, the curve is deactivated. The
controller maintains the minimum speed specified for this point until the
curve is reactivated or until a new single minimum speed is specified
using the first method.
○
○
○
Temperature
or Speed
○
○
○
○
d50
○
○
○
d70
○
○
○
○
○
d35
○
○
○
○
○
d25
Temperature Curve
○
○
○
○
○
d4 d10
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
Minimum Speed Curve
d80
Days
NOTE:
If the room temperature falls below the values shown in Table 1 below, the
fans will begin to run at the minimum speed specified for the first point of
the curve and will continue to do so as long as the room temperature
remains below the set point. When the room temperature rises above the
set point, the fans will return to the current minimum speed, calculated
according to the minimum speed curve.
34
DVS-25HA.rev.06
DVS-25HA
Table 1.
STAGE 7
OPERATION
THRESHOLD VALUE
Cooling
''Set Point - 5.0°F (2.8°C)''
''Set Point - 5.0°F (2.8°C) - Heater Offset - Stage 7 Differential''
OR
Heating
''Set Point'', if the parameter settings are such that the preceding value is greater than the set point.
Interaction Between Temperature and Minimum Speed
Curves
•
The minimum speed curve can be activated only if the temperature
curve is already activated
•
All points of the minimum speed curve other than the first one are
automatically given day numbers identical to those specified for the temperature curve. Only the first point of the minimum speed curve has an
adjustable day number. This day number must be greater or equal to the
day number specified for the first point of the temperature curve and less
than the day number specified for the second point of the temperature curve
(see example 1).
EXAMPLE 1
TEMPERATURE CURVE
MINIMUM SPEED CURVE
POINT 1
d5
d5 to d19 (adjustable)
POINT 2
d20
d20 (not ajustable)
DVS-25HA.rev.06
35
DVS-25HA
•
When the minimum speed curve is activated, it will effectively be operating (i.e. the controller will begin to adjust the minimum speed according to
the specified points of the curve) only when the current day number of the
temperature curve reaches the first day number of the minimum speed curve.
EXAMPLE 2
TEMPERATURE CURVE
MINIMUM SPEED CURVE
Day
Temperature
Day
Speed
POINT 1
d5
90.0 °F
d10
10 %
POINT 2
d20
85.0 °F
d20
20 %
•
If you activated the temperature curve yesterday, the current day number of the temperature curve is d6. Therefore, if you activate the minimum
speed curve today, it will effectively be in operation in 4 days, when the
current day number of the temperature curve reaches d10. In the meantime, the fans will run at the specified single minimum speed (see
example 2).
•
If you activated the temperature curve six days ago, the current day
number of the temperature curve is d11. Therefore, if you activate the minimum speed curve today, it will effectively be in operation the moment you
activate it. In this case, the current minimum speed will be a value between
10% and 20%.
36
DVS-25HA.rev.06
DVS-25HA
1
Specifying Minimum Speed Curve
n
Set the selection knob to
STAGE 1 — MIN. SPEED /
CURVE. The current minimum
speed flashes on the display.
n
Press the push-button. The word OFF is displayed, indicating that
the minimum speed curve is deactivated. If this is not the case,
deactivate the curve as described below.
Repeat the following steps for each of the six points:
n
Press the push-button once again. A day number is displayed,
alternating with the word "day".
n
For the first point of the curve, use the adjustment knob to adjust
the day number to the desired value. For all other points of the
curve, the day number can not be adjusted.
n
Press the push-button once again. The minimum speed for that
day is displayed, alternating with the letters "SPd".
n
Use the adjustment knob to adjust the minimum speed to the desired
value.
NOTES:
i) The minimum speed curve must be deactivated before specifying the points
on the curve (see below).
ii) All six points of the curve must be specified. If you do not need six
different points, repeat your last minimum speed for each unnecessary point of the curve.
iii) Certain restrictions apply to reduce the risk of errors:
• decreasing minimum speeds are not allowed.
• the minimum speed variation cannot exceed 10% per day.
DVS-25HA.rev.06
37
DVS-25HA
2
Activating Minimum Speed Curve
If you have just finished specifying the points on the curve:
n
Press the push-button once again. The word OFF flashes.
n
Turn the adjustment knob clockwise by one notch. The word ON
flashes on the display and the Minimum Speed Curve Pilot Light turns
on, indicating that the minimum speed curve is now activated.
If you have previously specified the points on the curve:
n
Set the selection knob to STAGE 1 — MIN. SPEED / CURVE. The
current minimum speed flashes on the display.
n
Press the push-button to display the points of the curve currently
defined until the word OFF appears (fourteen clicks).
n
Turn the adjustment knob clockwise by one notch. The word ON
flashes on the display and the Minimum Speed Curve Pilot Light turns
on, indicating that the minimum speed curve is now activated.
3
Viewing Current Minimum Speed and Day
When the minimum speed curve is activated, the current minimum
speed and day number can be viewed at any time. To modify the day
number, refer to the section on temperature curves.
n
Set the selection knob to STAGE 1 — MIN. SPEED / CURVE. The
current minimum speed is displayed.
n
Press the push-button. The current day is displayed, alternating with
the letters "cur. dAY".
38
DVS-25HA.rev.06
DVS-25HA
4
Deactivating Minimum Speed Curve
n
Set the selection knob to STAGE 1 — MIN. SPEED / CURVE. The
current minimum speed is displayed.
n
Press the push-button to display the points of the curve currently
defined until the word ON appears (fourteen clicks).
n
Turn the adjustment knob counterclockwise by one notch. The word
OFF flashes on the display. The Minimum Speed Curve Pilot Light
starts blinking, indicating that the minimum speed curve is now deactivated.
DVS-25HA.rev.06
39
DVS-25HA
OUTSIDE TEMPERATURE COMPENSATION ON STAGE 1
BANDWIDTH
In cold weather conditions, sudden increases in room temperature that are
known to be short-lived can be tolerated without unduly increasing ventilation. An INTERFACE-3 unit can be connected to the DVS-25HA to provide
outside temperature readings used to compensate the Stage 1 bandwidth.
As the outside temperature drops below the outside set point, the Stage 1
bandwidth is increased. Two parameters are needed to define the compensation: an outside set point and the total degrees (°F) of compensation at
Outside Set Point - 10°F. These parameters are defined using the NORWIN
software. The compensation is calculated in a linear fashion between the
two limit points.
Stage 1
Bandwidth
Fully
compensated
bandwidth
Normal
uncompensated
bandwidth
Compensation begins
Total
Compensation (°F)
10°F
Outside
Set Point
Outside
Temperature
When compensation is in effect, the user can view the level of compensation by placing the selector knob at STAGE 1 — BANDWIDTH and waiting
6 seconds: the compensated bandwidth is displayed, alternating with the
letters "Ou.C". If no compensation is in effect, no compensated value is
displayed.
40
DVS-25HA.rev.06
DVS-25HA
VENTILATION SETTINGS
1
Adjusting Stage 1 Bandwidth
The Stage 1 bandwidth is the temperature interval within which the Stage 1
variable speed fans increase or decrease in speed proportionally to the
temperature (see Fig. 3 below). The bandwidth can be adjusted between
0.5°F and 20.0°F (0.3°C and 11.1°C).
n
n
Set the selection knob to STAGE
1 — BANDWIDTH/TIMER. The
current bandwidth for Stage 1
flashes on the display.
DIFF ER ENTIA L
Use the adjustment knob to adjust
the bandwidth to the desired value.
STAGE 2
FULL
STAGE 2
MINIMUM
Bandwidth Stage 2
STAGE 1
FULL
STAGE 1
MINIMUM
Room
Temp.
Offset
Stage 2
Bandwidth
Stage 1
Temperature
Set Point
Figure 3: Operation of Stages 1 and 2 With Negative Offset
DVS-25HA.rev.06
41
DVS-25HA
2
Adjusting Stage 2 Offset
The Stage 2 offset is the temperature difference between the moment Stage
1 fans reach full speed and Stage 2 fans start running at minimum speed (see
Fig. 3 above). The offset can be adjusted between -20.0°F and 20.0°F
(-11.1°C and 11.1°C). When the offset is negative, Stage 2 fans start running
before Stage 1 fans reach full speed (see Fig. 3 above). If properly adjusted,
this makes for a smoother transition in air displacement.
If a negative offset is used and if a WR-F-1AB is connected to the
controller, Stages 1 and 2 are combined into one stage during
calibration. Reference point B is then the starting temperature of the
first stage to start its fans (point A is 0.4°F below point B). Point C
becomes the temperature at which the second stage reaches full
speed, the second stage being the one that reaches full speed last.
Reference point D applies to the first constant-speed fan stage.
A B
C
0.4°F
STAGE 2
FULL SPEED
STAGE 2
MIN. SPEED
BW Stage 2
STAGE 1
FULL SPEED
STAGE 1
MIN. SPEED
Bandwidth
Stage 1
Offset
Stage 2
Room Temp.
Temperature Set Point
Figure 4: Example of a WR-F-1AB calibration with a negative offset
42
DVS-25HA.rev.06
DVS-25HA
n
Set the selection knob to STAGE 2 — OFFSET/BANDWIDTH. The
current offset for Stage 2 flashes on the display, alternating with the
letters "OFT".
n
Use the adjustment knob to adjust the offset to the desired value.
3
Adjusting Stage 2 Bandwidth
The Stage 2 bandwidth is the temperature interval within which the Stage 2
variable speed fans increase or decrease in speed proportionally to the
temperature (see Fig. 3 above). The bandwidth can be adjusted between
0.5°F and 20.0°F (0.3°C and 11.1°C).
n
Set the selection knob to STAGE 2 — OFFSET/BANDWIDTH. The
current offset for Stage 2 is displayed, alternating with the letters "OFT".
n
Press the push-button. The current bandwidth for Stage 2 is displayed,
alternating with the letters "bd".
n
Use the adjustment knob to adjust the bandwidth to the desired value.
4
Adjusting Stage 2 Minimum Speed
The minimum speed can be adjusted between 10% and 100% of the full speed
of the fans.
n
Set the selection knob to STAGE 2 — MIN. SPEED. The current
minimum speed for Stage 2 flashes on the display.
n
Use the adjustment knob to adjust the minimum speed to the desired
value.
DVS-25HA.rev.06
43
DVS-25HA
5
Adjusting Stage 3 - 7 Differentials
The Stage 3 - 7 cooling differentials are the temperature differences between
the moment the constant-speed fans start to run and the moment they turn
off for each stage (see Fig. 1 above). The differentials can be adjusted
between 0.5°F and 20.0°F (0.3°C and 11.1°C). Note that if the stage 2 offset
is negative, the stage 3 differential is calculated from the bandwidth of the
stage that reaches full speed last (stage 1 or 2 – see Fig. 3 above).
n
Set the selection knob to STAGES 3-7 — DIFFERENTIAL. The current
differential for Stage 3 is displayed, alternating with the letters «St. 3».
n
Use the adjustment knob to adjust the differential to the desired value.
n
Press the push-button. The current differential for Stage 4 flashes on
the display, alternating with the letters "St 4".
n
Use the adjustment knob to adjust the differential to the desired value.
n
If Stage 5 has been configured for cooling, press the push-button. The
current differential for Stage 5 flashes on the display, alternating with the
letters "St 5".
n
Use the adjustment knob to adjust the differential to the desired value.
n
If Stage 6 has been configured for cooling, press the push-button. The
current differential for Stage 6 flashes on the display, alternating with the
letters "St 6".
n
Use the adjustment knob to adjust the differential to the desired value.
n
If Stage 7 has been configured for cooling, press the push-button. The
current differential for Stage 7 flashes on the display, alternating with the
letters "St 7".
n
Use the adjustment knob to adjust the differential to the desired value.
44
DVS-25HA.rev.06
DVS-25HA
MERGING STAGES 1 & 2
The transition from Stage 1 to Stage 2 fans can create jumps in the volume
of displaced air. This can be smoothed out either by defining an offset
between the two stages or by merging. When merging is used, the Stage 1
fan speed is decreased to match the speed of Stage 2 fans when Stage 2
fans start up. As the temperature continues to increase, fan speed is increased on both stages to create a smooth progression. When the temperature reaches Set Point + Bandwidth 1 + Offset 2 + Bandwidth 2, Stages
1 and 2 reach maximum speed. To enable the merging feature, set internal
switch #10 to ON. Note that the offset between the two stages should be
set to a value that makes for the smoothest transition in air displacement. If
the Stage 2 offset is negative such that Stage 2 fans start before Stage 1
fans, Stage 1 fans are started along with Stage 2 fans at Stage 2 minimum
speed and increase in speed according to the Stage 2 bandwidth.
Stage 1
Fan Speed
100%
Stage 2 Min. Speed
Stage 1 Min. Speed
Bandwidth
Stage 1
Offset
Stage 2
Bandwidth
Stage 2
Room
Temperature
Temperature
Set Point
DVS-25HA.rev.06
45
DVS-25HA
MIST COOLING
The last cooling stage can be configured as a mist stage. To activate mist
cooling, set internal switch #9 to ON. The number of heating stages
determines which stage this is.
NUMBER OF HEATING STAGES
0
1
2
MIST STAGE
7
6
5
The following diagram sums up the operation of the mist units.
Mist units turn on
in timer mode
Mist units turn off
Mist
Diff.
OFF
Set Point
Room
Temperature
Mist Offset
If the humidity compensation is activated, the mist units are turned off
when the humidity reaches a user-defined maximum humidity level.
The mist units operate according to a timer cycle. Time on is the running
time of the mist units and time off is the off time of the mist units.
TIME ON
ON
OFF
TIME OFF
46
DVS-25HA.rev.06
DVS-25HA
1
Adjusting Mist Differential
The mist differential is the variation in room temperature between the moment
the mist units turn on and the moment they turn off.The differential can be
adjusted between 0.5°F and 20.0°F (0.3°C and 11.1°C).
n Set the parameter selection
knob to MIST — TIMER/OFFSET/DIFF. The current time
on for the mist cycle is displayed, alternating with the
letters "On".
n Press the push-button three times. The mist differential is displayed,
alternating with the letters "diF".
n Using the adjustment knob, set the differential to the desired value.
2
Adjusting Mist Offset
The mist offset is the temperature difference from the set point at which the
mist units turn off. The offset can be adjusted between 0.5°F and 40.0°F
(0.3°C and 22.2°C).
n Set the parameter selection knob to MIST — TIMER/OFFSET/
DIFF. The current time on for the mist cycle is displayed, alternating with the letters "On".
n Press the push-button twice. The mist offset is displayed, alternating
with the letters "Oft".
n Using the adjustment knob, set the offset to the desired value.
DVS-25HA.rev.06
47
DVS-25HA
3
Adjusting Mist Timer Settings
Time on and time off can be adjusted between 0 and 60 minutes, in increments
of 1 minute. To deactivate mist cooling, set time on to zero.
n Set the parameter selection knob to MIST — TIMER/OFFSET/
DIFF. The current time on for the mist cycle is displayed in minutes, alternating with the letters "On".
n Use the adjustment knob to set time on to the desired value (in minutes).
n Press the push-button. The current time off for the mist cycle is displayed in minutes, alternating with the letters "Off".
n Use the adjustment knob to set time off to the desired value (in minutes).
4
Adjusting Humidity Turn Off Level
The humidity turn off level is the humidity level at which mist units are turned
off. This parameter is not displayed unless humidity compensation is
activated (see Humidity Compensation). The value ranges from 40 to 100%.
When the mist units are turned off, the compensation pilot light turns on.
n Set the parameter selection knob to MIST — TIMER/OFFSET/
DIFF. The current time on for the mist cycle is displayed, alternating with the letters "On".
n Press the push-button four times. The current turn off level is displayed, alternating with the letters "StP rH".
n Use the adjustment knob to set the turn off level to the desired value.
48
DVS-25HA.rev.06
HEATER SETTINGS
CASCADING HEATERS
When cascading heating is used, the temperature used is the average room
temperature (internal switch 8 is turned OFF). To use stages 6 and 7 for
heating, set internal switches # 6 and 7 to ON. To use only stage 7 for heating,
set internal switch # 6 to ON and # 7 to OFF.
Heating
Heater 2 ON
Heater 2 OFF
Heater 2
Heater 1 ON
Heater 1
Heater 1 OFF
HEATER 2
DIFFERENTIAL
HEATER 1
DIFFERENTIAL
HEATER 1
OFFSET
Room
Temperature
Set Point
If the room temperature rises:
- at Set Point - Heater 1 Offset - Heater 1 Diff.: Heater 2 turns off.
- at Set Point - Heater 1 Offset: Heater 1 turns off.
If the room temperature falls:
- at Set Point - Heater 1 Offset - Heater 1 Diff.: Heater 1 turns on.
- at Set Point - Heater 1 Offset - Heater 1 Diff. - Heater 2 Diff.: Heater
2 turns on.
DVS-25HA.rev.06
49
DVS-25HA
ZONED HEATERS
To configure your system for zoned heaters, set dipswitch # 8 to ON. Since
the two heater outputs function independently, different probes are assigned
to each output: Probes 1 and 2 are assigned to Heater 1 and Probes 3 and
4 are assigned to Heater 2. Individual probes can be turned on or off using
the dipswitch settings. If both probes are activated for a given heater, the
average temperature from both probes is used. To use stages 5 and 6 for
heating, set internal switches # 6 and 7 to ON. To use only stage 6 for
heating, set internal switch # 6 to ON and # 7 to OFF.
Both heating zones can have negative and positive heater offsets. A negative offset is used when controlling heat mats, for example.
To avoid ventilation problems when using zoned heating, a special protection is built into the device. Suppose the animals are young and confined to
one part of the building (zone 1) while the rest of the building is heated at a
minimum level (zone 2). If the temperature difference between zones is too
ZONE 2
PROBES 3 & 4
NOT USED
M IN IM U M H E AT
ZONE 1
PROBES 1 & 2
Y O U N G A N IM A LS
great and zone 1 fans operate according to the average temperature for both
zones, cooling in zone 1 may be insufficient. A built-in protection will operate the fans according to the zone 1 probes whenever the temperature difference between zones is greater than a user-defined value. Note that the
heaters can become active only if the average temperature from all activated
50
DVS-25HA.rev.06
DVS-25HA
probes is below the set point. If this isn't the case, the heaters will not turn
on even if individual probe temperatures are below the set point.
The figure below explains the operation of zoned heaters.
Heating
Heater turns on
ON
Heater turns off
OFF
HEATER
DIFFERENTIAL
Temperature
HEATER
OFFSET
Set Point
If the room temperature rises:
- at Set Point - Heater Offset 1 (Zone 1) : Heater 1 turns off.
- at Set Point - Heater Offset 2 (Zone 2) : Heater 2 turns off.
If the room temperature falls:
- at Set Point - Heater Offset 1 - Diff. 1 (Zone 1) : Heater 1 turns on.
- at Set Point - Heater Offset 2 - Diff. 2 (Zone 2) : Heater 2 turns on.
DVS-25HA.rev.06
51
DVS-25HA
1
Adjusting Heater Offsets
The heater offset can provide substantial energy savings if correctly adjusted according to the outside temperature. It is the number of degrees
below the set point at which the heating units turn off (see diagram above).
The heater 1 and 2 offsets can be adjusted between -10oF and 20.0oF
(-5.6oC and 11.1oC). If the heater offset is negative, the heating units will turn
off at temperatures above the set point. If cascading heating is used, only
Heater 1 offset is used.
n
Set selection knob to HEAT 1
— OFFSET/DIFF. or HEAT 2
— OFFSET/DIFF. The current
heating offset is displayed, alternating with the letters "OFT".
n
Use the adjustment knob to adjust the offset to the desired value.
2
Adjusting Heater Differentials
The heating differential is the temperature difference between the moment
the heater units turn on and the moment they turn off (see diagram above).
The differential can be adjusted between 0.5oF and 20.0oF (0.3oC and 11.1oC).
n
Set the selection knob to HEAT 1 — OFFSET/DIFF. or HEAT 2 —
OFFSET/DIFF. The current heater offset is displayed, alternating with
the letters "OFT".
n
Press the push-button. The heater differential is displayed, alternating with the letters "DIF".
n
Use the adjustment knob to adjust the differential to the desired value.
52
DVS-25HA.rev.06
DVS-25HA
3
Adjusting Max. Temperature Difference Between
Zones
When using zoned heating, a built-in protection will operate the fans according to the zone 1 probes whenever the temperature difference between zones
is greater than this parameter. The default value is 7.5°F (4.2°C) and values
range from 5°F to 40.0°F (2.8°C to 22.2°C). To activate this feature, set
internal switch # 12 to ON.
n
Set the selection knob to HEAT 2 — OFFSET/DIFF. The current heater
offset is displayed, alternating with the letters "OFT".
n
Press the push-button twice. The maximum temperature difference
between zones is displayed, alternating with the letters "dif Zon".
n
Use the adjustment knob to adjust the temperature difference to the
desired value.
DVS-25HA.rev.06
53
DVS-25HA
HUMIDITY COMPENSATION USING HEATER 1
Heater 1 can be used to reduce humidity levels under certain conditions.
When the relative humidity is greater than the humidity set point, Heater 1
operates according to a timer cycle as long as Stage 2 fans are not running.
When the humidity drops to the humidity set point - 3%, Heater 1 turns off.
This feature is enabled by setting internal switch # 11 to ON. The alternative
to using this feature is to compensate the Stage 1 minimum speed (see
Ventilation Settings — only one of the two compensation methods can be
used). Note that if zoned heaters are used, both heaters 1 and 2 are used
to compensate humidity.
Heater 1 operates
according to timer settings
Heater 1 turns off
Heater 1
3%
Relative
Humidity
Set Point
Heater 1 operates according to timer settings as shown below:
TIME ON
ON
OFF
TIME OFF
54
DVS-25HA.rev.06
Relative
Humidity
DVS-25HA
1
Viewing Relative Humidity
The relative humidity is expressed as a percentage.
n
Set the selection knob to
STAGE 1 — HUMIDITY. The
current relative humidity is displayed.
n
Turn the adjustment knob clockwise by one notch. The minimum
humidity flashes on the display, alternating with the letters "Lo".
n
Turn the adjustment knob clockwise one notch further. The maximum
humidity flashes on the display, alternating with the letters "Hi".
n
Turn the adjustment knob clockwise a third notch. The current humidity value is displayed again.
NOTE: If you let the display flash for more than 10 seconds when the
maximum or minimum humidity is displayed, the controller resets the minimum and maximum humidity values currently in memory (the display stops
flashing to indicate that the reset has been done).
2
Activating / Deactivating Humidity Compensation
n
Set the selection knob to STAGE 1 — HUMIDITY. The current humidity
reading is displayed.
n
Press the push-button. The current on/off state of humidity compensation
flashes on the display.
n
Use the adjustment knob to adjust the on/off state to the desired value.
DVS-25HA.rev.06
55
DVS-25HA
3
Adjusting Relative Humidity Set Point
When the relative humidity exceeds the humidity set point, Heater 1 turns
on and operates according to the timer settings as long as Stage 2 fans are
not running. Note that the humidity compensation feature must be activated for this to work.
n
Set the selection knob to STAGE 1 — HUMIDITY. The current humidity
reading is displayed.
n
Press the push-button twice. The relative humidity set point is
displayed, alternating with the letters "set rH".
n
Use the adjustment knob to adjust the set point to the desired value.
4
Adjusting Heater 1 Timer Settings
The timer is used to operate Heater 1 for humidity compensation. Time on
and Time off can be adjusted from 0 to 900 seconds, in steps of 15 seconds.
n
Set the selection knob to STAGE 1 — HUMIDITY . The current humidity
reading is displayed.
n
Press the push-button three times. The current time on is displayed,
alternating with the word "On".
n
Use the adjustment knob to adjust the time on to the desired value.
n
Press the push-button. The current time off is displayed, alternating
with the word "OFF".
n
Use the adjustment knob to adjust the time off to the desired value.
56
DVS-25HA.rev.06
ALARM SETTINGS
The controller sets off an alarm in the case of a power failure, a fault in the
supply circuit or a high or low temperature. Temperature alarms are defined according to the set point as shown in the diagram below.
Room
Temperature
High Temperature Alarm
High Alarm Offset
Set Point
Low Alarm Offset
Time
If an INTERFACE-3 is connected to the DVS-25HA to monitor the outside
temperature, the high alarm is handled differently. When the outside
temperature is greater than the set point, the set point is replaced by the
outside temperature as the reference point. This means an alarm is set off
when the indoor temperature reaches Outside Temperature + High Alarm
Offset. A third parameter, called the critical high temperature, is defined to
continue monitoring the indoor temperature for high temperatures. When
the indoor temperature reaches the critical high temperature (defined as
an absolute value), an alarm is set off.
Adjusting the Alarm Settings
The high and low alarm offsets range from 0.5oF to 40oF.
n
Set the selection knob to ALARM
OFFSETS. The current low alarm
offset flashes on the display, alternating with the word "LO".
n
Use the adjustment knob to set the low alarm offset to the desired
value.
A LA R M O FFS E TS
DVS-25HA.rev.06
57
DVS-25HA
n
Press the push-button. The current high alarm offset flashes on the
display, alternating with the word "HI".
n
Use the adjustment knob to set the high alarm offset to the desired
value.
n
If an INTERFACE-3 is connected to the DVS-25HA, press the pushbutton. The current critical high temperature is displayed, alternating
with the letters "Cri".
n
Use the adjustment knob to set the critical high temperature to the
desired value.
58
DVS-25HA.rev.06
TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
The display
doesn't work.
The circuit breaker on
the service panel is off
or tripped.
Reset the circuit breaker.
The wiring is incorrect.
Fix the wiring.
The input fuse is
open.
Replace the fuse.
The voltage selector
switch is in the wrong
position.
Set the switch to the correct
position.
The display board
interconnect cable is
unplugged from the
power supply board.
Plug the cable.
The display
shows the
letter "P"
Probe # 1 is improperly connected.
Fix the probe's connection.
The Defective
Probe Pilot
Light is on.
One or more probes
are defective.
Follow the procedure described
in DEFECTIVE PROBES to
identify and replace the defective probe.
The display
shows
sudden
variations in
room temperature.
A variation in resistance is induced on a
probe.
Make sure the probes are dry
and move them away from
drafts and sources of radiant
heating.
There is electrical
noise near an extended probe cable.
Do not run probe cables next to
other power cables. When
crossing other power cables,
cross at 90o.
SOLUTION
DVS-25HA.rev.06
59
DVS-25HA
PROBLEM
Stage 1 or 2
fans are not
running.
60
CAUSE
SOLUTION
The wiring is incorrect.
Correct the wiring. In particular,
make sure two different lines are
connected to each motor: line L1
modulated by the controller
should be combined with another
line (N for 115V or L2 for 230V) to
activate the motor. Also, be sure
the Stage 1 and 2 COMMON is
supplied by line L1.
The Stage's fuse is
open.
Replace the fuse.
The display board
interconnect cable is
not plugged into the
power supply board
properly.
Make sure the cable is firmly
plugged in with the tabs in
place.
The minimum speed
is too low.
Adjust the minimum speed to a
higher value.
The fan motor is
defective.
Check if motor is defective by
connecting it to an alternate
power supply. Replace the
motor if it still doesn't operate.
DVS-25HA.rev.06
DVS-25HA
PROBLEM
CAUSE
The wiring is incorStage 1 or 2
rect.
fans run
continuously at
The ambient temperafull speed.
ture is above the set
point.
Stage 1 or 2
fans run
erratically.
Stage 1 or 2
fans do not
stop running
when the
controller is
operating in
minimum
ventilation
cycle.
SOLUTION
Fix the wiring.
Adjust the set point to the
desired value.
The selected motor
curve is inappropriate.
Select an appropriate motor
curve.
The differential is too
small.
Adjust the differential to a
higher value.
The time on or time
off is too short.
Adjust the time on or time off to
a higher value.
Time off is set to zero.
Set time off to a value other than
zero.
The wiring is incorrect.
Correct the wiring. In particular,
make sure two different lines
are connected to each motor:
line L1 modulated by the
controller should be combined
with another line (N for 115V or L2
for 230V) to activate the motor.
Also, be sure the stage 1 COMMON is supplied by line L1.
DVS-25HA.rev.06
61
DVS-25HA
PROBLEM
Stage 3, 4, 5,
6 or 7is not
operating.
62
CAUSE
SOLUTION
The Stage's fuse is
open.
Replace the fuse.
The display board
interconnect cable is
not plugged into the
power supply board
properly.
Make sure the cable is firmly
plugged in with the tabs in place.
The wiring is incorrect.
Correct the wiring. In particular,
make sure two different lines
are connected to each motor:
line L1 modulated by the
controller should be combined
with another line (N for 115V or L2
for 230V) to activate the motor or
heating unit. Also, make sure the
Stage COMMON is supplied by
line L1.
The fan motor or
heating unit is
defective.
Verify if the motor or heating unit
is defective by connecting it to
an alternate power supply.
Replace the motor or heating
unit If it still is not operating.
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 repair the controller.
DVS-25HA.rev.06
DVS-25HA
PROBLEM
CAUSE
SOLUTION
Stages 6 and
7 are not
running as
expected.
The internal switches
are improperly set.
Verify the internal switch
settings.
Stages 5, 6
and 7 are not
running.
The fuse on the slave
box is blown.
Replace the fuse.
The voltage selector
on the slave box is not
properly set.
Change the setting of the voltage
selector on the slave box.
The slave box is not
plugged into the
master box.
Make sure the cable is properly
connected.
DVS-25HA.rev.06
63
TECHNICAL SPECIFICATIONS
MASTER BOX
Supply: - 115/230 VAC (-18%, +8%), 60 Hz, L1 same phases as Stages 1 and
2, overload and overvoltage protection fuse F6-1A fast blow.
- 12 VDC for AC back-up supply; can activate stages 1 through 7 and
alarm if supplied with DC back-up voltage.
Stage 1: Variable output, 60 Hz, 10A FAN (3/4 HP/115 VAC) / (1.5 HP/230VAC),
fuse F1-15A slow blow.
Stage 3: ON-OFF output, 115/230 VAC, 60 Hz, 30VDC, 6A FAN,10A RES, fuse F715A slow blow.
Stage 4: ON-OFF output, 115/230 VAC, 60 Hz, 30VDC, 6A FAN,10A RES, fuse
F3-15A slow blow.
Alarm: ON-OFF output, 115/230 VAC, 60 Hz, 30VDC, 3A , fuse F5-3A slow blow.
AUXILIARY BOX
Supply: - 115/230 VAC (-18%, +8%), 60 Hz, L1 same phases as Stages 1 and
2, overload and overvoltage protection fuse F6-1A fast blow.
- 12 VDC for AC back-up supply; can activate stages 2, 5, 6 and 7 if
supplied with DC back-up voltage.
Stage 2: Variable output, 60 Hz, 10A FAN (3/4 HP/115 VAC) / (1.5 HP/230VAC),
fuse F1-15A slow blow.
Stage 5: ON-OFF output, 115/230 VAC, 60 Hz, 30VDC, 6A FAN,10A RES, fuse
F7-15A slow blow.
Stage 6: ON-OFF output, 115/230 VAC, 60 Hz, 30VDC, 6A FAN,10A RES, heating
or cooling, fuse F3-15A slow blow.
Stage 7: ON-OFF output, 115/230 VAC, 60 Hz, 30VDC, 6A FAN,10A RES, heating
or cooling, fuse F4-15A slow blow.
Probes: Low voltage ( < 5V), isolated from the supply. Operating range:
40.0° to 120.0°F (-40.0° to 48.9°C). Accuracy: 1.8oF (1oC) between 41o and 95oF
(5o and 35oC).
Enclosure: ABS, moisture and dust-tight.
The room temperature where the controller is located MUST
ALWAYS REMAIN BETWEEN 32o AND 104oF (0o AND 40oC).
64
DVS-25HA.rev.06
FACTORY SETTINGS
F A C T O R Y
S E T T I N G
R A N G E O F
V A L U E S
7 5 oF ( 2 3 . 9 oC )
- 4 0 t o 9 9 . 9 oF
( - 4 0 t o 3 7 . 7 oC )
Mi ni mum
Speed
40 %
10% to 100%
Ti me On
15 seconds
Ti me Off
0 seconds
Bandwi dth
3 oF ( 1 . 7 oC )
0 . 5 t o 2 0 oF
( 0 . 3 t o 1 1 . 1 oC )
65%
40 to 100%
relati ve humi di ty
0%
0 to 100% of stage 1
mi ni mum speed
P A R A M E T E R
Te m p e r a t u r e S e t P o i n t
Stage 1
Humi di ty Set
Poi nt
Humi di ty
C ontrol
C ompensati on
Percentage
Heater 1
Ti me On
Heater 1
Ti me Off
Offset
Bandwi dth
Stage 2
Stages
3 to 7
Mi n. Speed
0
seconds
0 seconds
0 to 900 seconds by
i ncrements of 15
seconds
0 to 900 seconds by
i ncrements of 15
seconds
0 . 5 oF ( 0 . 3 oC )
- 2 0 t o 2 0 oF
( - 1 1 . 1 t o 1 1 . 1 oC )
2 oF ( 1 . 1 oC )
0 . 5 t o 2 0 oF
( 0 . 3 t o 1 1 . 1 oC )
40%
10 to 100%
Ti me On
0 seconds
Ti me Off
0 seconds
D i fferenti al
2 oF ( 1 . 1 oC )
0 to 900 seconds by
i ncrements of 15
seconds
0 . 5 t o 2 0 oF
( 0 . 3 t o 1 1 . 1 oC )
DVS-25HA.rev.06
65
DVS-25HA
PAR AM E T E R
Mist
Ti me On
0 minutes
Ti me Off
0 minutes
Offset
Differential
Humi d i ty Turn
Off Level
R AN GE OF
VAL U E S
0 to 60 minutes,by
increments of 1
minute
12°F (6.7°C)
0 . 5 t o 4 0 oF
( 0 . 3 t o 2 2 . 2 oC )
2 oF ( 1 . 1 oC )
0 . 5 t o 2 0 oF
( 0 . 3 t o 1 1 . 1 oC )
95%
40 to
100%
0 . 5 oF ( 0 . 3 oC )
- 1 0 t o 2 0 oF
( - 5 . 6 t o 1 1 . 1 oC )
7.5°F (4.2°C)
5 to 40°F
(2.8 to 22.2°C)
High Offset
1 2 . 0 oF ( 6 . 7 oC )
0 . 5 t o 4 0 oF
( 0 . 3 t o 2 2 . 2 oC )
Low Offset
1 0 . 0 oF ( 5 . 6 oC )
0 . 5 t o 4 0 oF
( 0 . 3 t o 2 2 . 2 oC )
9 9 . 9 oF ( 3 7 . 7 oC )
- 4 0 t o 9 9 . 9 oF
( - 4 0 t o 3 7 . 7 oC )
Heater Offset
M a x . Te m p e r a t u r e
Difference Between
Zones
Alarms
FAC T ORY
S E T T IN G
C r i t i c a l Te m p .
NOTES:
i) These initial parameter settings will not be retained in the controller's
memory. Each new setting will replace the preceding one.
ii) If the power supply is cut off, the last parameter settings will be retained in memory until the power is restored.
66
DVS-25HA.rev.06
FUNCTION SUMMARY
POSITION
ROOM
TEMPERATURE
SET POINT / T°
CURVE
DISPLAY
MEANING
steady value
Room temperature
Pr1 - On/OFF
Pr2 - On/OFF
Pr3 - On/OFF
Pr4 - On/OFF
Room temperature and on/off state for probe x
Lo / Hi
Minimum / Maximum temperature value.
flashing value
User-adjusted set point.
steady value
Set point calculated using the temperature
curve.
On / OFF
Status of temperature curve.
dAY
Day number of the current temperature curve
point.
se t
Set point of the current temperature curve point.
DVS-25HA.rev.06
67
DVS-25HA
POSITION
D ISPLAY
flashi ng value
User-adjusted mi ni mum speed.
steady value
Mi ni mum speed calculated usi ng the mi ni mum
speed curve.
On / OFF
Status of mi ni mum speed curve
dAY
D ay number of the curve poi nt for mi ni mum
sp e e d
SPd
Mi ni mum speed of the curve poi nt for mi ni mum
sp e e d
C ur.dAY
The current day reference for mi ni mum speed
curve.
flashi ng value
Bandwi dth
Ou.C
Bandwi dth di splayed i s compensated for
outsi de temperature
On
Ti me On for mi ni mum venti lati on cycle
OFF
Ti me off for mi ni mum venti lati on cycle
tYP
Motor type for vari able speed motors
steady value
C urrent relati ve humi di ty readi ng.
Lo / Hi
Mi ni mum and maxi mum humi di ty levels.
On / OFF
Status of humi di ty compensati on.
set rH
The relati ve humi di ty set poi nt.
SPd
Mi ni mum speed compensati on.
On
Ti me on for Heater 1 ti mer.
OFF
Ti me off for Heater 1 ti mer.
STAGE 1 - MIN.
SPEED / C URVE
STAGE 1 BAND WID TH/
TIMER
STAGE 1 HUMID ITY
68
MEAN IN G
DVS-25HA.rev.06
DVS-25HA
POSITION
STAGE 2 OFFSET/
BAND WID TH
STAGE 2 - MIN.
SPEED
STAGES 3-7
D IFFERENTIAL
MIST
TIMER/OFFSET/
D IFF.
HEAT 2 OFFSET/D IFF.
D ISPLAY
MEAN IN G
Oft
Stage 2 offset.
bd
Bandwi dth
tYP
Motor type for vari able speed motors.
flashi ng value
Mi ni mum speed.
On
Ti me on.
Off
Ti me Off.
St.x
D i fferenti al for stage x.
On
Ti me on for mi st cycle.
Off
Ti me off for mi st cycle.
Oft / StP
Mi st offset (stop temperature).
di F / Str
Mi st di fferenti al (start temperature).
StP rH
Humi di ty turn off level.
Oft / StP
Heater 2 offset (stop temperature).
di F / Str
Heater 2 di fferenti al (start temperature).
di F Zon
Max. temperature di fference between zones.
Oft / StP
Heater 1 offset (stop temperature).
di F / Str
Heater 1 di fferenti al (start temperature).
Lo
Low alarm offset.
Hi
Hi gh alarm offset.
C ri .
C ri ti cal temperature.
HEAT 1 OFFSET/D IFF.
ALARM OFFSETS
DVS-25HA.rev.06
69
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