Phason SEC-HD User manual

STAGED ENVIRONMENT CONTROL
MODEL SEC-HD USER'S GUIDE

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LIMITED WARRANTY
PHASON warrants this unit, the SEC-HD, subject to the following terms and conditions. This warranty is valid only to the original purchaser for
a period of 2 years from the date of manufacturing. Manufacturing date is stated in the first eight digits of the serial number in the form year-
month-day. PHASON hereby warrants that should this product prove defective by reason of improper workmanship, PHASON will repair the
unit, effecting all necessary parts replacements without charge for either parts or labour.
CONDITIONS
1. Installation must be made in accordance with our enclosed installation instructions.
2. The unit must not have been previously altered, modified or repaired by anyone other than PHASON.
3. The unit must not have been subject to accident, misuse, abuse or operated or installed contrary to the instructions contained in
the accompanying manual. The opinion of PHASON with respect to these matters shall be final.
4. The person requesting the services provided hereunder must be the original purchaser of the unit and furnish proof of purchase
upon request.
5. This warranty is applicable only to the PHASON SEC-HD Temperature Control.
6. All transportation charges on units submitted for warranty repair must be borne by the purchaser.
7. For warranty services, return unit together with original proof of purchase to your dealer.
EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW, NO OTHER WARRANTIES, WHETHER EXPRESSED
OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
SHALL APPLY TO THIS UNIT. ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. PHASON SHALL NOT BE
LIABLE FOR CONSEQUENTIAL DAMAGES SUSTAINED IN CONNECTION WITH THE SAID UNIT. PHASON NEITHER
ASSUMES NOR AUTHORIZES ANY REPRESENTATIVES OR OTHER PERSONS TO ASSUME FOR IT ANY
OBLIGATION OR LIABILITY OTHER THAN SUCH AS IS EXPRESSLY SET FORTH HEREIN.
PHASON RESERVES THE RIGHT TO IMPROVE OR ALTER THE SEC-HD WITHOUT NOTICE.
SERVICE AND TECHNICAL ASSISTANCE
Your dealer will be happy to answer all technical questions which will improve your use of the control. Be prepared
with the model number, serial number and necessary information before you place a call to your dealer. If your
control requires service when the warranty period has expired, return the unit to your dealer.

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TABLE OF CONTENTS
FEATURES OF THE SEC-HD ........................................................................................................................ 1
GETTING STARTED...................................................................................................................................... 2
SEC-HD Electrical Ratings .................................................................................................. 4
Equipment List ..................................................................................................................... 5
GETTING TO KNOW THE SEC-HD ............................................................................................................. 6
Definition of Terms.............................................................................................................. 7
ADJUSTING THE SEC-HD ............................................................................................................................ 8
Selecting a new Operating Program ..................................................................................... 8
Changing Parameter Settings................................................................................................ 9
Setup Parameters.................................................................................................................. 11
Programming Tips................................................................................................................11
Reloading the Factory Settings............................................................................................. 13
SEC-HD OPERATION .................................................................................................................................... 14
Parameter Descriptions ........................................................................................................ 16
Parameter Ranges................................................................................................................. 19
Factory Programs ................................................................................................................. 20
METHODS OF USE ........................................................................................................................................ 21
ALARM MESSAGES ...................................................................................................................................... 22
Reasons for Alarms to Activate............................................................................................ 22
CARE AND MAINTENANCE ........................................................................................................................ 24
POWER FACTOR CORRECTION ................................................................................................................. 25
APPENDIX A - Wiring Diagrams.................................................................................................................... 26
APPENDIX B - Self-test Procedure ................................................................................................................. 39
APPENDIX C - Trouble Shooting Guide ......................................................................................................... 43
APPENDIX D - Blank Program Tables............................................................................................................ 46

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102452 Rev. 2 1
FEATURES OF THE SEC-HD
The Staged Environment Control (SEC-HD), is a microprocessor based product designed to efficiently control the
environment in livestock buildings. It connects to two variable speed fans, a combination of secondary fans and heaters and
an alarm system. When operating, the SEC-HD measures and displays the room temperature. While monitoring the
temperature it controls the connected ventilation and heating equipment according to the programmed settings to keep the
temperature at the desired point. The program settings can be adjusted to change the turn on points and other parameters of
the stages. This is a list of the standard features of the SEC-HD.
•Digital display of temperature, alarms and settings
•7 programs with pre-programmed factory settings which can be easily changed
•A built-in keyboard to allow easy adjustment of settings
•3 stages with relay contacts to control secondary fans or heaters
•A relay to signal high or low temperature, power interruptions or low line voltage conditions
•Internal memory is retained during power failures
•115/230 VAC operation @ 10.0 full load amps output for each variable speed fan (with noise suppression to
eliminate radio and T.V. interference)
•Three second full power turn on for variable speed outputs to minimize fan freeze-up
•Transient protected
•Compact design, 18cm/7" (H) x 23cm/9" (W) x 9.5cm/3.75" (D)
•Non-corrosive, fire retardant enclosure
•Two year warranty
•Sensor can be extended

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GETTING STARTED
Congratulations on the purchase of your new SEC-HD environment control! This manual has been prepared to help you get
the utmost in satisfaction from your SEC-HD. It contains detailed information regarding the installation and operation of the
control. The Getting Started section will step you through the installation and configuration of your SEC-HD. The following
steps refer to other sections of this user's guide for additional information. For this reason, it is not necessary to read through
the entire document from front to back, but rather in the order that the information is needed.
CHECKING RATINGS OF EQUIPMENT
STEP 1•Read the SEC-HD ELECTRICAL RATINGS on page 4.
•Fill in the EQUIPMENT LIST on page 5.
WARNING: The equipment to be connected to the SEC-HD control must not draw more
current than what the SEC-HD stages are rated for. Use of equipment that is rated
higher than the SEC-HD will result in damage to the control and will void the warranty.
INSTALLATION
STEP 2•Follow the instructions in Appendix A for installing and wiring the SEC-HD
and equipment. Be sure to read the General Warnings section in Appendix A
before installation.
TESTING
STEP 3•Turn to Appendix B and follow the instructions there, to test the operation of
the equipment installed to ensure that it is connected properly.

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SETTING UP
STEP 4
•Read through the GETTING TO KNOW THE SEC-HD section on page 6 and
get familiar with the programming procedures.
•Read the SETUP section on page 11.
•Configure the SEC-HD according to the type of equipment connected.
•Mark the changes in the Blank Program Tables in Appendix D.
PUTTING CONTROL INTO SERVICE
STEP 5•Read the SEC-HD OPERATION section on page 14.
•Select the most useful factory program, see page 20.
•Make changes to the program as desired, see page 9.
•Mark the changes in the Blank Program Tables in Appendix D.
METHODS OF USE
STEP 6•Read the METHODS OF USE section on page 21.

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SEC-HD Electrical Ratings
TEMP SENSOR
Standard sensor: 30
feet
ALARM RELAY RATINGS:
0.2 Amps, 230 VAC
0.4 Amps, 24 VAC
2 Amps, 30 VDC for
resistive loads
STAGES 3, 4 and 5 MAXIMUM RATINGS:
6 FLA (full load amps) each
115 or 230 VAC
VARIABLE SPEED STAGES
MAXIMUM RATINGS:
10.0 FLA (full load amps) each
115 or 230 VAC
NOTE: This is not a wiring diagram. All wiring diagrams are located in Appendix A.

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Equipment List
Make and Model # of fan(s):
Max. Total Current Draw of fan(s):
Must not be greater than 10.0 amps.
Variable
Speed
Stage 1
Operating Voltage:
Make and Model # of fan(s):
Max. Total Current Draw of fan(s):
Must not be greater than 10.0 amps.
Variable
Speed
Stage 2
Operating Voltage:
Make and Model # of fan/heater:
Max. Total Current Draw:
Operating Voltage:
Cool / Heat
Stage 3
Make and Model # of fan/heater:
Max. Total Current Draw:
Operating Voltage:
Cool / Heat
Stage 4
Make and Model # of fan/heater:
Max. Total Current Draw:
Operating Voltage:
Cool / Heat
Stage 5
Alarm relay connected to:
Alarm
* A power contactor must be used if the maximum total current draw is greater than the maximum ratings of the relay. See the
maximum ratings on page 4.

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GETTING TO KNOW THE SEC-HD
1) PROGRAM button - used to select the desired
operating program.
2) STORE button - used to save selected programs and
parameter settings in memory.
3) PARAMETER button - used to scroll through the
parameter list.
4) RETURN button - used to bring the control back to
normal operation.
5) DOWN button - used to adjust a parameter.
6) UP button - used to adjust a parameter.
7) STAGE 1 indicator light.
8) STAGE 2 indicator light.
9) STAGE 3 indicator light.
10) STAGE 4 indicator light.
11) STAGE 5 indicator light.
12) Complete parameter list.

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Definition of Terms
NORMAL OPERATION The SEC-HD is in normal operation when it is displaying room temperature. When alarms
occur, the display will alternately flash the alarm signal and room temperature.
PROGRAMS Programs consist of the Main, Differential, General and Setup parameters. The SEC-HD has
seven programs which can be selected and reprogrammed by the user.
OPERATING PROGRAM The SEC-HD operates according to the parameters in the operating program. Any one of the
seven programs may be selected as the operating program.
PARAMETER LIST The parameter list is shown on page 19, and is printed on the front of the SEC-HD control. It
is a list of all the parameters that may be programmed by the user.
PARAMETERS Parameters are the individual settings which may be programmed. Read the PARAMETER
DESCRIPTIONS section on page 16 for an explanation of each of the parameter. There are
four categories of parameters.
1) Main - The MAIN parameters control the main operation of the control.
2) Differential - These parameters are programmable differentials. They are the number of
degrees above or below the temperature set point the particular stage starts or turns on.
3) General - GENERAL parameters are common to all programs. These parameters can have
only one setting which is the same in all programs.
4) Setup - SETUP parameters control the overall operation of the unit. These parameters can
have only one setting which is the same in all programs.

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ADJUSTING THE SEC-HD
Selecting a New Operating Program
As livestock matures, often a change in the room climate is needed. The SEC-HD has seven different programs in memory
for seven different climate settings. Any one of these programs can be the operating program. In order to change the
operating program of the SEC-HD, follow the instructions below. For a list of the factory settings see Table 2, on page 20.
1) Press the PROG button once.
The SEC-HD will display the current operating program,
(one of A, b, C, d, E, F or g). The display will flash the
program name and Pr.
2) Press the PROG button a number of times until the desired
program is displayed.
By pressing the PROG button, the program names are
displayed one after another. To change to a different
operating program, press the PROG button until
the proper program is displayed.
3) Press the STORE button to enter the desired program into
memory.
When the correct program is displayed, pressing the
STORE button will tell the SEC-HD to use the selected
Program as the operating program. After Stor is displayed,
the SEC-HD returns to normal operation.

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Changing Parameter Settings
Follow the steps below to view and/or edit the parameters in any program. After the parameters have been edited, the changes
should be marked in the Blank Program Tables in Appendix D for future reference.
1) Press the PROG button until the program that you want to edit is
displayed.
The display will flash the program letter, (A to g) and Pr.
2) Press the PARM button once.
The first (left most), digit shows the program letter that is being
edited.
The second digit indicates if the program is the operating
program. An o means the program is the operating program, a
blank means it is not the operating program.
The two right most digits show the parameter number to be
edited.
3) Press the UP or DOWN key to turn memory protect off.
The display will show Ao 0 and then oFF indicating memory
protect has been turned off. The parameters can now be adjusted.
If memory protect in not turned off, the parameters can only be
viewed. Attempting to adjust the parameters while memory
protect is on will result in an Err message being displayed.

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4) Press the PARM button to step through the parameter list until
the desired parameter is reached.
Refer to the front cover of the SEC-HD control or see Table 2
on page 20 for the parameter list.
5) Use the UP / DOWN buttons to adjust the setting.
The parameter can be adjusted to any value with in the
parameter's range. The ranges can be found on page 19.
6) Press STORE to save the setting in memory.
The display will show Stor for 1 second indicating the new
setting has been stored in memory. If the PARM button is
pressed before pressing STORE the next parameter will appear
and the previous one will change back to its previous setting.
Continue through the parameter list by pressing the PARM
button and making changes to the settings where needed.
Follow the same procedure shown in steps 4 to 6 above.
7) To return to normal operation (displaying of room temperature)
at any time, press the RETURN button.
When RETURN is pressed, memory protect is automatically
turned back on. If a parameter has been changed but the value
has not been stored, pressing RETURN will change the
parameter's setting to the last stored setting and return the
control to normal operation.
NOTE: If the SEC-HD is left displaying a parameter it will revert back to normal operation in 1 minute automatically. If
STORE was not pressed the displayed parameter will change back to its previous value.

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Setup Parameters
The setup parameters should be programmed when the installation has been completed to configure the SEC-HD, and then
generally the parameters do not need to be reprogrammed. These parameters are different than the other parameters because
they do not have a different setting for each program and can not be edited in the normal way. Each setup parameter setting is
common to all programs. Follow the instructions below to change the setup parameters.
When the setup parameters have been programmed, the blank program table in Appendix D should be filled in with the new
settings for future reference. It is important that the configuration decal, included with the SEC-HD, is marked correctly and
affixed to the side of the SEC-HD when the setup parameters have been programmed. The configuration decal provides a
handy reference when you need to check the mode of operation of the staged outputs.
To Edit the Setup Parameters
Press the PARM button once to enter the edit mode. If you wish to
edit the setup parameters, you must turn off the memory protect now.
See page 9 to turn off the memory protection.
Next, press the PROG and PARM buttons simultaneously to access
the setup parameters. The Setup parameters can be adjusted as desired
and stored in the same way the normal parameters can. After the setup
parameters have been changed and stored, press the RETURN button
to return to normal operation.
Programming Tips
Scrolling Backwards
When viewing or editing the parameters, sometimes it is helpful to
scroll backwards through the parameter list. To do this, press the
PARM and UP buttons simultaneously. Instead of the SEC-HD
displaying the next parameter on the list, it will display the previous
parameter.

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Selecting a Parameter to Edit
The parameters are stored in a table in memory which is similar to the Factory Program Table on page 20. Any parameter in
any program can be edited when memory protection has been turned off. Follow these procedures when editing parameters to
become more efficient.
To move down to the next parameter press the PARM button.
To move up or backwards to the previous parameter press the PARM and UP buttons simultaneously.
To move right press the PROG button until the desired program is displayed, then press the PARM button once to edit the
same parameter number that was being edited before.
To Move Button(s)
↓
↓↓
↓PARM
↑
↑↑
↑PARM and UP
→
→→
→PROG
An example where this method of programming is useful would be a situation where the temperature set point of each
program needs to be changed. This could be done by turning off memory protection and changing the temperature set point in
the operating program, (the operating program is displayed with an o and the program name). Then press the PROG button
two times to edit the next program. Press the PARM button and edit the parameter. To continue to the next program press
the PROG button two times again. Remember that STORE must be pressed after each change to save the new setting in
memory.
Fast Editing
When editing the setting of a parameter by adjusting it up or down,
hold down either button and then press the other one. This will
change the setting ten times faster. If you want to increase the setting,
hold down the UP button and then press the DOWN button. The
setting will increase ten times faster. To decrease the setting ten times
faster, hold down the DOWN button and then press the UP button.

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Reloading the Factory Programs
The factory programs can be reloaded if so desired, to replace the existing program. If the existing programs are not
operating properly or need to be changed back to the original factory programs, follow the steps below to reload the factory
programs.
When the factory programs are reloaded, the existing programs including the setup parameters will be replaced.
The SEC-HD will begin with program A as the operating program. The parameters in all programs and most
importantly the setup parameters will need to be reprogrammed for the equipment that is connected. Pay close
attention to the setup parameters for stages 3, 4 and 5.
1) Turn off the power to the SEC-HD.
2) Hold down the PROG and STORE buttons.
3) While holding the buttons down, turn the power back on. The
display will flash Stor for two seconds and then the SEC-HD will
be in the normal operating mode, displaying the room temperature
and a power failure alarm.

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SEC-HD OPERATION
Figure 2 shows the operation of each stage of the SEC-
HD. This particular diagram shows the temperatures at
which the stages would turn on and off if the SEC-HD was
operating according to the factory settings in program A.
Some settings are listed here but the entire factory
program table can be found on page 20. The circled
numbers in the diagram correspond to the parameter
numbers. Use these numbers to cross reference the
parameters in the diagram to their descriptions. All stages
except the low temperature and high temperature alarms
have a programmable hysteresis, parameter # 23.
PARAMETER SETTINGS
1 Temp Set (Start P-Band 1) 85.0oF
2 Stage 1 Min Vent 20%
3 Stage 2 Min Vent 20%
4 Stage 1 OSB -3.0
5 Stage 1 P-Band 1 2.0
6 Stage 2 OSB 0.0
7 Stage 2 Start P-Band 2 2.0
8 Stage 2 P-Band 2.0
9 Stage 3 Turn On 5.0
10 Stage 4 Turn On 7.0
11 Stage 5 Turn On -1.0
12 Low Temp Alarm -3.0
13 High Temp Alarm 10.0
NOTE: When the variable speed stages turn on, they will
run full speed for three seconds and then decrease to the
required speed.
EXAMPLE
As an example, say the temperature is 75oF and rising. At
this point Stage 5 (heat) and the Low Temp Alarm will be
on. When the temperature rises to 82, the Low Temp
Alarm will turn off and the Stage 1 fan will turn on. The
Stage 1 fan will run at full speed for three seconds and
then slow down to the Minimum Ventilation setting.
When the temperature reaches 84, Stage 5 (heat) will turn
off. At 85 the Stage 1 P-Band begins. While the
temperature rises in the P-Band, the Stage 1 fan will
increase in speed. At 87 Stage 1 will be at full speed.
When the temperature rises to 88 the Stage 2 P-Band
begins. Since the Stage 2 fan has been off until now, it
will run full speed for three seconds and then slow down
to the required speed. As the temperature rises, the Stage
2 fan will increase in speed. At 90 the Stage 2 fan will be
at full speed.
At 90 Stage 3 (cool) will turn on.
At 92 Stage 4 (cool) will turn on.
When the temperature rises to 95 the High Temp Alarm
will turn on.

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Figure 2 SEC-HD Operation diagram. Circled numbers correspond to the parameter numbers.