Del-air Sr-242 User manual

User’s Guide

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SR-242 USER’S GUIDE

41D01C7 (F7) Page 2 of 2 02/04/30

Table of Contents

1. Introduction ....................................................................................................................3

2. Faceplate ..........................................................................................................................3

2.1 Parameter List ..............................................................................................................3

2.2 Parameter Buttons ( and ) .................................................................................4

2.3 Function Buttons ( and ) .............................................................................................4

2.4 LED Status Window ...................................................................................................4

2.5 Value Setting Buttons ( and )...........................................................................4

2.6 Outputs List With LEDs............................................................................................5

3. Inputs/Outputs Table .............................................................................................................6

4. Equipment ...............................................................................................................................6

5. Configuration Versions ..........................................................................................................6

6. Ventilation System Overview ................................................................................................7

7. Glossary ...................................................................................................................................7

8. Description of Parameters .....................................................................................................8

9. Alarm .....................................................................................................................................18

10. Additional Information on Parameters...........................................................................18

10.1 Clock ..........................................................................................................................18

10.2 Probe ..........................................................................................................................18

11. Supplementary Information on CI-1/24 .........................................................................19

12. Parameter Table................................................................................................................20

13. Wiring Diagram ................................................................................................................25

SR-242 USER’S GUIDE

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1. Introduction

The SR-242 is a powerful control which can be programmed to work in many types of

situations. By developing a configuration logic, the SR-242 can meet the needs of

your specific application. The configuration logic or software is the brain of the control

system, and basically makes the relation between the sensor readings, the user

adjusted parameters, and the activation or deactivation of outputs. This software is

stored in a chip identified with a configuration number, as shown in the title of this

document, and as it appears on your left hand side label of your control. Always keep

on hand this configuration number when you are contacting your dealer.

To fully understand your SR-242, it is important to read both the SR-242

Installation Guide and this User’s Guide. The Installation Guide informs you on: how

to install the control system, safety issues, warranty and many others characteristics

of the SR-242 whereas the User’s Guide is a document which explains the specific

configuration logic. This control also features limited access to parameters for

employees (referred to as the user in this document) and gives full access for the

supervisor.

Temperature units in this document are represented in both °F and °C for information

purposes only. The temperature unit programmed in your configuration is either in °F

or °C and cannot be changed.

2. Faceplate

The SR-242’s faceplate features a LED Status window, 1

parameter list, 1 outputs list with 11 LEDs, 2 function buttons

(L2 and L3), 2 parameter buttons ( and ) and 2 value

setting buttons ( and ). Below is a brief description of all

features, from left to right on the faceplate.

2.1 Parameter List

On the left-hand side of the faceplate appears a list of the

parameters programmed in the ordered configuration. Due to

limited space, not all parameters (with secondary and tertiary

functions) are listed.. All parameters that do not show up on

the parameter list can be accessed with the arrow parameter

buttons ( and ).

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2.2 Parameter Buttons (and )

The parameter buttons are represented by the 2 squares with

arrows in them. Pressing the up ( ) or down arrow( ) will

move the parameter list up or down.

2.3 Function Buttons (and )

The round section buttons help users to select extra settings

which appear on the list with L2 and L3 symbols. These

settings may be accessed first by selecting the main parameter

with the parameter buttons ( and ). Whenever there is a

main parameter with only one L2, or one L3, simply press on

the L2 or L3 again to return to the main parameter or wait for

it to automatically switch to the main parameter. When the

main parameter has multiple L2, the user must scroll back to

the main parameter using the L2 button.

2.4 LED Status Window

The LED status window features a 5 digit LED readout display

of temperature in Fahrenheit or Celsius, or other

programmable settings. After a setting is selected, its value

appears on the LED display. If the value is flashing, it can be

changed with the value setting buttons ( and ).

2.5 Value Setting Buttons (and )

The value buttons appear as 2 squares with a + and - sign in

them. They are used to increase or decrease the value on the

LED window. Press the button once and release it to increase

or decrease the value by one increment. The value may be

changed quickly by keeping your finger on either button.

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41D01C7 (F7) Page 5 of 5 02/04/30

2.6 Outputs List With LEDs

On the right-hand side of the faceplate appear 11 LEDs (1

alarm and 10 multi-purpose outputs) next to which is a list of

10 outputs. A LED comes ON whenever the respective output

is active, in alarm or in a particular state.

SR-242 USER’S GUIDE

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Inputs Qty Outputs Qty

Inside temperature 3 Variable Fan stages (can be heaters) 2 to 4

Ambient temperature 1 ON/OFF Fan stages (can be heaters) 4 to 6

Curtains 2

Inlets (Optional) 1 to 2

Alarm 1

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Item Description Qty

SR-242 Intelligent Control, 4 inputs / 10 outputs 1

2004-1KLT Temperature Sensor (-41.8 to 74.4°C) (-43.6 to 166.2°F) blue 4

CI-1/24 ** (Optional) Cable Inlet (24 volts) 1 to 2

RM-2 (Optional) Relay module 1

VM-2 (Optional) Variable Module (10Amps) 1

** CI-1/24 version must be 110b or higher.

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Version Date Modification

C0 01/06/14 New. (CheckSum: BDB1673E)

C0(F0) 01/02/10 Modification on output order ( CheckSum for C0: 6DF6C6F7,

CheckSum for F0: 9AEA37CE)

v1 01/11/07 Modification on Curtain #2 logic.

v2 02/01/23 - Supervisor Code added

- Tunnel Mode Delay added

- Curtain #2 Open Time added

- Modification on Sensor Select parameter

- “Percent Exhaust Fan” logic added for Cable Inlet position

- Curtains can move in tunnel mode if selected

v3 02/02/04 - Curtains position in Emergency Mode corrected

v4 02/02/08 - Output 7 & 8 on RM-2 or VM-2 Corrected

v5 02/02/20 - Curtains Modes Select changed (1 to 8)

- Tunnel Mode Delay logic changed

- Outputs Sensor Select changed

v6 02/04/26 - Stage transition while Tunnel Mode Delay modified

- Manual mode for curtains corrected

- Sensor select added for curtains

- CI-1/24 diagnostic parameter added

v7 02/04/30 - Correction on both curtains in Emergency Mode

- Curtain positions saved when respective status is “don’t move”, used to keep position

when a reset occurs.

- CI-1/24 diagnostic parameter removed

- Second CI-1/24 added

- Supervisor code changed

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This configuration was developed for a mechanical, natural, tunnel ventilation building. All output stages

can be either heating or cooling. Stages 7 and 8 have an option to be ON/OFF stages or variable stages

or an Inlet(s) output (1 to 2). This configuration can run in 4 different modes: Mechanical, Natural, Tunnel,

Emergency. This configuration is also equipped with a Test Mode

Modes description:

Mechanical Mode is the default mode when the control is turned ON, curtains close.

Control goes in Natural Mode when the CURTAIN #1 SENSOR SELECT has reached TARGET TEMP +

CURTAIN #1 BAND. The control returns to Mechanical Mode when CURTAIN #1 SENSOR SELECT is

below TARGET TEMP + CURTAIN #1 BAND - 1.0°C and it calculates that both curtains are closed.

Control goes in Tunnel Mode when the AVERAGE TEMPERATURE has reached TARGET

TEMP +

TUNNEL

BAND. The control returns to Natural Mode when the AVERAGE TEMPERATURE drops to

TARGET

TEMP + (TUNNEL

BAND / 2), curtains respectively open for a delay equal to CURT 1 OPEN

RUNTIME and CURT 2 OPEN RUNTIME parameter.

Note: - To go in Natural Mode, Curtain #1 must be enabled for Natural Mode, otherwise no Natural Mode will be

possible

- To go in Tunnel Mode, TUNNEL BAND must not be set to OFF, otherwise no Tunnel Mode will be possible

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Throughout this document, the following terminology is used:

Target This is the Temperature goal for the room and it is also the reference temperature

for all relative settings.

On Band Number of degrees relative to the Target where an output will turn ON for relay

stages or reaches 100% for variable stages.

Off Band Number of degrees relative to the Target where an output will turn OFF for relay

stages or turn ON at minimum speed for variable stages until the respective Min

Band is reached. If the On Band is higher than the Off Band, the stage will be set

to cooling, otherwise the stage will be set to heating.

Min Band Number of degrees relative to the Target where an output of variable stage

accelerates his speed from Minimum Speed to 100% when the On Band has

been reached.

Minimum Speed This is to control the minimum speed of variable stages when the Off Band has

been reached, until the Min Band has been reached to start acceleration.

Run Time This is to set the duration time of a single movement of the curtain whether opening or

closing.

Idle Time This is to set the length of time the control waits before moving the curtains another

movement.

Fast Idle Time This is to set the length of time the control waits before moving the curtains in the

closed direction when the average room temperature is below the Target temperature.

ON / OFF Duration This is to set the timespan the output will be turned ON / OFF on a temperature

demand.

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ATTENTION: Expressions in ITALICS are user’s parameters whereas expressions in COURIER are

supervisor’s parameters. Supervisor’s parameters are read only or hidden for the user. Expressions in

CAPITALS are reading parameters and can not be changed with the interface.

- All the following descriptions refer to the wiring diagram at the end of this document.

- All the timers can have an imprecision of approximately 6 seconds.

- Temperature is measured in Celsius or Fahrenheit.

- Both curtains must be completely closed before downloading configuration.

- Curtain position is saved when respective curtain doesn’t move, this feature is used to keep curtain

positions when a reset occurs.

Parameter # 1 : AVERAGE TEMPERATURE

This parameter displays the average temperature. The average is made from the 3 inside temperature

sensors. Each sensor can be deactivated in this average with the AVG SENSOR SELECT parameter

setting. This parameter is displayed to the nearest 0.1° from a minimum display of -41.8°C (-43.6°F) to

maximum of 74.4°C (166.2°F).

L2: see Note 1

L3: see Note 2

Parameter # 2 : SENSOR 1

This parameter displays sensor 1 temperature. This sensor can be deactivated with the AVG SENSOR

SELECT parameter setting. This parameter is displayed to the nearest 0.1° from a minimum display of

-41.8°C (-43.6°F) to maximum of 74.4°C (166.2°F).

L2: see Note 1

L3: see Note 2

Parameter # 3 : SENSOR 2

This parameter displays sensor 2 temperature. This sensor can be deactivated with the AVG SENSOR

SELECT parameter setting. This parameter is displayed to the nearest 0.1° from a minimum display of

-41.8°C (-43.6°F) to maximum of 74.4°C (166.2°F).

L2: see Note 1

L3: see Note 2

Parameter # 4 : SENSOR 3

This parameter displays sensor 3 temperature. This sensor can be deactivated with the AVG SENSOR

SELECT parameter setting. This parameter is displayed to the nearest 0.1° from a minimum display of

-41.8°C (-43.6°F) to maximum of 74.4°C (166.2°F).

L2: see Note 1

L3: see Note 2

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41D01C7 (F7) Page 9 of 9 02/04/30

Parameter # 5 : AMBIENT

This parameter displays the ambient sensor temperature. This parameter is displayed to the nearest 0.1°

from a minimum display of -41.8°C (-43.6°F) to maximum of 74.4°C (166.2°F).

L2: see Note 1

L3: see Note 2

Note 1:

This parameter displays the probes which make the average. To access these readings, press L2 and the

readings of each probe will show on the LED display.

Note 2:

In addition to the sensor readout, the parameter can record the lowest and highest value reached. To

access the Hi/Lo function, press L3 of the respective SENSOR # parameter. To clear the respective Hi/Lo

values, after pressing L3, press and hold the + and - buttons until CLR appears on the LED display.

For more information on the Probe parameter, see the Additional Information on Parameters section.

Parameter # 6 : CLOCK

Gives the time in 24h format.

L2: ADJUST MINUTES

Adjust minutes for CLOCK function.

L3: ADJUST HOURS

Adjust hours for CLOCK function.

For more information on the Clock parameter, see the Additional Information on Clock section.

Parameter # 7 : TARGET TEMP

This is the temperature goal for the room and it is also the reference temperature for all relative settings.

The TARGET TEMP

is adjusted in 0.1° increments from a minimum setting of 0.0°C (32.0°F) to maximum

setting of 40.0°C (105.0°F).

L2: TUNNEL BAND

This parameter is used to set the bandwidth, which, when exceeded, changes the mode that the control is

currently in if this parameter is not set to OFF. The control returns to Natural Mode when the AVERAGE

TEMPERATURE drops to ½ of the TUNNEL BAND (if curtain #1 is enabled in natural mode). If there is no

natural mode and AVERAGE TEMPERATURE drops to ½ of the TUNNEL BAND,control goes in

mechanical mode. The TUNNEL

BAND is adjusted in 0.1° increments from a minimum setting of 0.0° to

maximum setting of 40.0°, OFF.

L3: ALARM BAND

This parameter is used to set the alarm bandwidth for a high or low temperature alarm. When the

AVERAGE TEMPERATURE is below the TARGET

TEMP - ALARM

BAND, a low temperature alarm will

occur. When the AVERAGE TEMPERATURE is above the TARGET

TEMP + ALARM

BAND, a high

temperature alarm will occur unless the AMBIENT is above the TARGET

TEMP, in which case the

AVERAGE TEMPERATURE needs to be higher than the AMBIENT + ALARM

BAND. The ALARM

BAND is

adjusted in 0.1° from a minimum setting of 0.5° to maximum setting of 40.0°.

SR-242 USER’S GUIDE

41D01C7 (F7) Page 10 of 10 02/04/30

Parameter # 8 : STAGE # (1-2, 7-8)

L2: STAGE # MIN BAND

These parameters are used to set the number of degrees from the TARGET

TEMP in which the respective

output of variable stage will accelerate from its minimum speed to its STAGE # ON BAND (cooling stage)

or will keep running at its minimum speed until the STAGE # OFF BAND has been reached (heating

stage). These settings must be between respective ON BAND and OFF BAND. These parameters are

adjusted in 0.1° increments from a minimum setting of -40.0° to a maximum setting of 40.0°.

L3: STAGE # MIN SPEED / MIN OPEN

These parameters are used to set the minimum speed of the respective output of a variable stage. If

Stage7/8 are used for an inlet(s), this parameter sets their minimum opening when the calculated result of

the “% Exhaust Fan” logic for inlet(s) opening is less than the INLET MIN BAND parameter. If Stage 7/8

are not used for an inlet(s) and STAGE # 7 MIN OPEN value setting is under 12%, this parameter will be

considerate as OFF. These parameters are adjusted in 1% increments from a minimum setting of 12%

(0% for STAGE # 7 MIN OPEN) to a maximum setting of 100%.

Parameter # 9 : STAGE # (1 to 8)

Both these settings can be either positive or negative. If STAGE # ON BAND is higher than the respective

STAGE # OFF BAND, the respective stage will be set to cooling, otherwise the stage will be set to

heating.

L2: STAGE # ON BAND

These parameters are used to set the number of degrees from the TARGET

TEMP in which the respective

output of a variable stage will reach 100% of their speed or will turn ON for a relay stage. These

parameters are adjusted in 0.1° increments from a minimum setting of -40.0° to a maximum setting of

40.0°.

L3: STAGE # OFF BAND

When the stage is set to cooling, for relay stage when temperature decreases to TARGET

TEMP + STAGE

# OFF BAND the stage will turn OFF, for a variable stage when temperature reaches TARGET

TEMP +

STAGE # OFF BAND,the stage will turn ON at their minimum speed, if temperature decreases to

TARGET

TEMP + STAGE # OFF BAND - 0.3° the stage will turn OFF. When the stage is set to heating, for

relay stage when the STAGE # OFF BAND has been reached the stage will turn OFF, for variable stage

when temperature decreases to TARGET

TEMP + STAGE # OFF BAND the stage will turn ON at their

minimum speed, if temperature increases to TARGET

TEMP + STAGE # OFF BAND + 0.3° the stage will

turn OFF. There is a differential of 0.3° for variable stages. These parameters are adjusted in 0.1°

increments from a minimum setting of -40.0° to maximum setting of 40.0°.

ex: next page

SR-242 USER’S GUIDE

41D01C7 (F7) Page 11 of 11 02/04/30

Cooling variable stage

TARGET

TEMP = 23.0°C (73.0°F)

STAGE # MIN BAND = 2.0°

STAGE # OFF BAND = 1.0°

STAGE # ON BAND = 4.0°

STAGE # MIN SPEED = 30%

Heating variable stage

TARGET

TEMP = 23.0°C (73.0°F)

STAGE # MIN BAND = -2.0°

STAGE # OFF BAND = -1.0°

STAGE # ON BAND = -4.0°

STAGE # MIN SPEED = 30%

Cooling relay stage

TARGET TEMP = 23.0°C (73.0°F)

STAGE # ON BAND = 3.0°

STAGE # OFF BAND = 2.0°

Heating relay stage

TARGET TEMP = 23.0°C (73.0°F)

STAGE # ON BAND = -3.0°

STAGE # OFF BAND = -2.0°

100%

75%

25%

50%

eed %

OFF

28.0

27.0

Temp °C

26.025.024.0

23.0 Tem

°C

(Tem

°F)

23.022.021.020.019.0

18.0

On Band

Off Band

On Band

OFF

Off Band

Temp °C

Min Band

(Temp °F)

eed %

100%

75%

25%

50%

Tem

°C

(Tem

°F)

28.027.026.025.024.0

23.0

On Band

Off Band

23.022.021.020.019.0

18.0

On Band

Off Band

(78.0)(77.0)(76.0)(75.0)(74.0)

(73.0)

Min Band

(

78.0

)

(

77.0

)

(

76.0

)

(

75.0

)

(

74.0

)

(73.0)

(

73.0

)

(

72.0

)

(

71.0

)

(

70.0

)

(

69.0

)

(

68.0

)

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41D01C7 (F7) Page 12 of 12 02/04/30

Parameter # 10 : STAGE # (1 to 8)

Theses settings are not applicable for stage 7-8 when inlet(s) is used (see parameter 23).

L2: STAGE # ON DURATION

These parameters are used to set the duration of the delay after which the respective output will be turned

ON when TARGET TEMP + STAGE # ON BAND has been reached for a relay stage and TARGET TEMP +

STAGE # OFF BAND has been reached for a variable stage. Each stage can be ON continuously if

respective STAGE # ON DURATION is set to ON. These parameters are adjusted in 1 second increments

from a minimum setting of 00:02 seconds to a maximum setting of 23:59, ON minutes.

L3: STAGE # OFF DURATION

These parameters are used to set the duration delay at which the respective output will be turned OFF

when TARGET TEMP + STAGE # ON BAND has been reached for a relay stage and TARGET TEMP +

STAGE # OFF BAND has been reached for a variable stage. These parameters are adjusted in 1 second

increments from a minimum setting of 00:02 seconds to a maximum setting of 23:59 minutes.

Parameter # 11 : STAGE # (1 to 8)

These settings are not applicable for stage 7-8 when inlet(s) is used (see parameter 23).

If both respective STAGE # ON TIME and STAGE # OFF TIME parameters are equal, the respective

output can not turn ON if it has a demand.

L2: STAGE # ON TIME

These parameters are used to establish the time that respective outputs can be activated. When the

clock is above this limit, respective output can be turned ON if it has a demand. These parameters are

adjusted in 1 minute increments from a minimum setting of 00:00 to a maximum setting of 23:59, ON

hours.

L3: STAGE # OFF TIME

These parameters are used to establish the time for which respective outputs have to stay deactivated.

When the clock is above this limit, respective output can not turn ON if it has a demand. These

parameters are adjusted in 1 minute increments from a minimum setting of 00:00 to a maximum setting of

23:59 hours

Parameter # 12 : STAGE # (1 to 8)

These settings are not applicable for stage 7-8 when inlet(s) is used (see parameter 23).

L2: STAGE # % EXHAUST FAN

These parameters are used to calculate the Inlet(s) position and curtain positions (if respective curtain is

enabled in tunnel mode). It is entered as the output’s percentage of exhaust ventilation compared with all

the exhaust fans’ ventilation combined with all the stages enabled in the current mode. If the respective

stage is set as an heater, the respective parameter STAGE # % EXHAUST FAN will not be considerate in

the calculated result of current exhaust fans’ ventilation. These parameters are adjusted in 1% increments

from a minimum of 0% to a maximum setting of 100%.

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41D01C7 (F7) Page 13 of 13 02/04/30

Parameter # 13 : INLET MIN BAND

This parameter is used to set the percentage of total exhaust ventilation at which the inlet(s) will start to

open. When the control is in a mode that inlet(s) is active and the percentage of exhaust fan ventilation is

below this parameter, the inlet(s) will stay at its minimum opening, otherwise inlet(s) will open

proportionally with the ventilation. This parameter is adjusted in 1% increments from a minimum of 0% to

a maximum setting of 100%.

L2: TUNNEL MODE DELAY

This parameter is used to set the time allowed for the tunnel inlet(s) to open before the cooling stages

enabled in tunnel only operate. For other cooling stages, the TUNNEL MODE DELAY will affect these

stages depending if the respective stage was enabled and running in the previous mode or not. If a

cooling stage was enabled and running in the previous mode before entering the tunnel mode and not

enabled in tunnel mode, this respective stage will run normally until the end of TUNNEL MODE DELAY, for

cooling stages that were not enabled in the previous mode and that are enabled for tunnel mode, these

stages will wait until the TUNNEL MODE DELAY is finished before starting to run. Finally, for a cooling

stage that was enabled and running in the previous mode and enabled in tunnel mode, TUNNEL MODE

DELAY will not affect this stage. The tunnel inlet(s) (and tunnel curtains if enabled) opens to the position it

will be at when the stages start to run after the delay. This parameter is adjusted in 1 second increments

from a minimum of OFF, 00:02 seconds to a maximum setting of 15:00 minutes.

STAGE 1 % EXHAUST FAN = 8%, enabled for Mechanical

STAGE 2 % EXHAUST FAN = 17%, enabled for Mechanical

STAGE 3 % EXHAUST FAN = 25%, enabled for Mechanical and Tunnel

STAGE 4 % EXHAUST FAN = 25%, enabled for Tunnel

STAGE 5 % EXHAUST FAN = 25%, enabled for Tunnel

STAGE 6 % EXHAUST FAN = 25%, output is used for heating

Since the numbers entered may not equal 100% the control will interpolate the numbers to make

them equal 100%. For example if the total is 50% it would use the double of each parameter, if

the total equaled 200%, it would use half of each parameter. The control figures out what

percentage of the mechanical ventilation is currently running.

Total Mechanical Exhaust Fans = 50%, (8% + 17% + 25%),

Stage 1 is running at 100%, stage 2 is running at 50% and stage 3 is off.

Mechanical exhaust ventilation for stage 1 = 8%, (100% * 8%),

Mechanical exhaust ventilation for stage 2 = 8.5%, (50% * 17%),

Mechanical exhaust ventilation for stage 3 = 0%, (0% * 25%),

Total mechanical exhaust ventilation running = 33%, (((8% + 8.5% + 0%) / 50%) * 100)

(16.5% / 50%) * 100

(0.165 / 0.5) * 100

0.33 * 100

33%

Parameter # 14 : STAGE #

These settings are not applicable for stage 8 when inlet(s) is used (see parameter 23).

L2: STAGE # EMERGENCY MODE

These parameters are used to establish if the respective output is enabled to run when control is in

emergency mode. If sensors 1 to 3 on the control are defective, the control will go into Emergency Mode.

When Emergency Mode is entered, curtains open at their respective position, inlet(s) opens at position set

in parameter STAGE #7 EMERGENCY MODE and then turns ON the outputs chosen here. Parameters for

stages 1, 2, 7, 8, 9 and 10 (STAGE #9 EMERGENCY MODE and STAGE #10 EMERGENCY MODE are

respectively curtain #1 and curtain #2) are adjusted in 1% from a minimum setting of OFF, 12% to a

maximum setting of 100%. Parameters for stages 3 to 6 can be set to OFF or ON.

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41D01C7 (F7) Page 14 of 14 02/04/30

Parameter # 15 : CURTAIN #1 BAND

This parameter is used to set the number of degrees from the TARGET

TEMP that the control change from

Mechanical Mode to Natural Mode. When TARGET

TEMP + CURTAIN #1 BAND has been reached,

curtain 1 will open 1 time during CURTAIN #1 RUNTIME, after that opening, if AVERAGE

TEMPERATURE stays within TARGET

TEMP + CURTAIN #1 BAND - 1.0° and TARGET

TEMP + CURTAIN

#1 BAND + 1.0°, curtain doesn’t move. When CURTAIN #1 SENSOR SELECT reaches TARGET

TEMP +

CURTAIN #1 BAND + 1.0°, curtain 1 (and 2 if TARGET TEMP +

CURTAIN #2 BAND

has already been

reached) will open on a respective cycle. The CURTAIN #1 BAND is adjusted in 0.1° from a minimum

setting of 0.0° to a maximum of 40.0°.

L2: CURTAIN #2 BAND

This parameter is used to set the number of degrees from the TARGET

TEMP that the curtain 2 will follow

CURTAIN #1 BAND for open or close on its respective cycle. This mean that when TARGET

TEMP +

CURTAIN #2 BAND has been reached, when CURTAIN #1 SENSOR SELECT is equal or higher than

TARGET

TEMP + CURTAIN #1 BAND + 1.0°, curtain 2 opens on a cycle, when AVERAGE

TEMPERATURE is equal or less than TARGET

TEMP + CURTAIN #1 BAND - 1.0°, curtain 2 closes on a

cycle, otherwise curtain 2 doesn’t move. The CURTAIN #2 BAND is adjusted in 0.1° from a minimum

setting of 0.0° to a maximum setting of 40.0°.

Parameter # 16 : CURTAIN #1 RUNTIME

This parameter is used to set the running time to open or close curtain 1. When control is in Natural Mode

and there is a cycled closing demand, curtain 1 will close during CURTAIN #1 RUNTIME and will wait for

a period of time (CURTAIN #1 IDLE or CURTAIN #1 FAST IDLE) before it restarts to close curtain 1.

Similar logic is used for a cycled opening demand, curtain 1 will open during CURTAIN #1 RUNTIME and

will wait for a period of time before it restarts to open curtain 1. Curtain 1 can open or close continuously if

this parameter is set to OFF. The CURTAIN #1 RUNTIME is adjusted in 1 second from a minimum

setting of OFF, 00:03 seconds to a maximum setting of 15:00 minutes.

L2: CURTAIN #1 IDLE

This parameter is used to set the time that the curtain 1 waits during a cycled opening or closing demand

if AVERAGE TEMPERATURE is above TARGET

TEMP. The CURTAIN #1 IDLE is adjusted in 1 second

from a minimum setting of 00:00 second to a maximum setting of 15:00 minutes.

L3: CURTAIN #1 FAST IDLE

This parameter is used to set the time that the curtain 1 waits during a cycled closing demand if

AVERAGE TEMPERATURE is below TARGET

TEMP. The CURTAIN #1 FAST IDLE is adjusted in 1

second from a minimum setting of 00:00 second to a maximum setting of 15:00 minutes.

Parameter # 17 : CURTAIN #2 RUNTIME

This parameter is used to set the running time to open or close curtain 2. When control is in Natural Mode

and TARGET

TEMP + CURTAIN #2 BAND has been reached and there is a cycled closing demand, curtain

2 will close during CURTAIN #2 RUNTIME and will wait for a period of time (CURTAIN #2 IDLE or

CURTAIN #2 FAST IDLE) before it restarts to close curtain 2. Similar logic for a cycled opening

demand, curtain 2 will open during CURTAIN #2 RUNTIME and will wait for a period of time before it

restarts to open curtain 2. Curtain 2 can open or close continuously if this parameter is set to OFF. The

CURTAIN #2 RUNTIME is adjusted in 1 second from a minimum setting of OFF, 00:03 seconds to a

maximum setting of 15:00 minutes.

SR-242 USER’S GUIDE

41D01C7 (F7) Page 15 of 15 02/04/30

L2: CURTAIN #2 IDLE

This parameter is used to set the time that the curtain 2 waits during a cycled opening or closing demand

if AVERAGE TEMPERATURE is above TARGET

TEMP. The CURTAIN #2 IDLE is adjusted in 1 second

from a minimum setting of 00:00 second to a maximum setting of 15:00 minutes.

L3: CURTAIN #2 FAST IDLE

This parameter is used to set the time that the curtain 2 waits during a cycled closing demand if

AVERAGE TEMPERATURE is below TARGET

TEMP. The CURTAIN #2 FAST IDLE is adjusted in 1

second from a minimum setting of 00:00 second to a maximum setting of 15:00 minutes.

Parameter # 18 : CURT 1 OPEN RUNTIME

This parameter is used to set the total time it takes to fully open the curtain #1 from a closed position. This

setting is used to fully open curtain #1 during a delay equal to this parameter when control changes modes

from Tunnel Mode to Natural Mode. The CURT 1 OPEN RUNTIME is adjusted in 1 second from a

minimum setting of 00:00 second to a maximum setting of 23:59 minutes.

L2: CURT 2 OPEN RUNTIME

This parameter is used to set the total time it takes to fully open the curtain #2 from a closed position. This

setting is used to fully open curtain #2 during a delay equal to this parameter when control changes modes

from Tunnel Mode to Natural Mode. The CURT 2 OPEN RUNTIME is adjusted in 1 second from a

minimum setting of 00:00 second to a maximum setting of 23:59 minutes.

Parameter # 19 : TEST MODE (0 = Pause)

This parameter is used to test each output. If this parameter is set to ON, control will test each output by

cycling sequences starting at sequence set in TEST MODE SEQUENCE # parameter. If this parameter is

set from OFF to 0, control will continuously test the sequence set in TEST MODE SEQUENCE

, if it is set

from ON to 0, control will pause the sequence where the control was cycling. When Test Mode is cycling,

control will test sequences from 1 to 16 for a delay of 10 seconds, for the curtains sequences (17 to 24),

control will test these sequences for a delay of 20 seconds. The TEST

MODE can be set to OFF, 0 (Pause)

or ON.

L2: TEST MODE SEQUENCE #

This parameter is used to set the sequence number to start cycling test mode or to continuously test if

TEST

MODE is set from OFF to 0. After changing this setting, wait for about 5 seconds for the change to

take effect before testing new sequence. This parameter can be set from 1 to 24.

Test Mode sequences:

1) Alarm ON

2) Alarm OFF

3) Stage 1 (Variable) at 40%

4) Stage 1 (Variable) ON

5) Stage 1 (Variable) OFF

6) Stage 2 (Variable) at 40%

7) Stage 2 (Variable) ON

8) Stage 2 (Variable) OFF

9) Stage 3 (Relay) ON

10)

Stage 3 (Relay) OFF

11)

Stage 4 (Relay) ON

12)

Stage 4 (Relay) OFF

13) Stage 5 (Relay) ON

14)

Stage 5 (Relay) OFF

15)

Stage 6 (Relay) ON

16)

Stage 6 (Relay) OFF

17)

Curtain 1 Open (20 sec.)

18)

Curtain 1 Stop (20 sec.)

19)

Curtain 1 Close (20 sec.)

20)

Curtain 1 Stop (20 sec.)

21)

Curtain 2 Open (20 sec.)

22)

Curtain 2 Stop (20 sec.)

23)

Curtain 2 Close (20 sec.)

24)

Curtain 2 Stop (20sec.)

SR-242 USER’S GUIDE

41D01C7 (F7) Page 16 of 16 02/04/30

Parameter # 20 : SUPERVISOR MODE (ACCESS TO PROTECTED PARAMETER)

When the supervisor mode is ON, this means that the user has full access (SUPERVISOR ON) to

all adjustable parameters. In other words, all parameters which are adjustable by the user,

including the protected parameters, will be visible and flashing.

When the supervisor mode is OFF, this means that the user does not have full access

(SUPERVISOR OFF) to all adjustable parameters. In other words, if certain parameters are

hidden in the supervisor mode, they will remain invisible to the user, and the parameters protected

by the supervisor code will not flash, indicating that no modification can be performed on these

parameters.

Su: ON = SUPERVISOR ON

Su:OFF=SUPERVISOR OFF

To alter the supervisor mode, follow the code entry procedure indicated below:

SUPERVISOR CODE: 1 1 1

1. The LED display of this parameter show if the supervisor is SUPERVISOR ON (Su:

ON) or SUPERVISOR OFF (Su: OFF).

2. To change the state of the supervisor mode, press L2 button. The LED display will

shows “1: 00”, at this moment, enter the first number of the supervisor code;

3. press L2 again, the LED display will shows “2: 00”, at this moment, enter the second

number of the supervisor code;

4. press L2 again, the LED display will shows “3: 00”, at this moment, enter the third

number of the supervisor code;

5. finally, press L3 to valid the code entered.

6. If the code entered is incorrect, “ERR” will appear on the LED display. At this point,

verify the supervisor code and retry the code entry procedure.

Parameter # 21 : STAGE #

L2: STAGE # MODES

These parameters are used to establish the modes that respective output is enabled to run in. The modes

are Mechanical, Natural and Tunnel. Respective output will only run if the temperature, timer and clock

was in state to run and the mode was set to the current mode the control is operating in. These

parameters can be set from 1 to 8.

Modes:

1) Enabled to run in Mechanical Mode only *

2) Enabled to run in Natural Mode only

3) Enabled to run in Tunnel Mode only

4) Enabled to run in Mechanical and Natural Modes *

5) Enabled to run in Mechanical and Tunnel Modes *

6) Enabled to run in Natural and Tunnel Modes

7) Enabled to run in All modes *

8) Disabled

* These settings are not applicable for both curtains, if a curtain mode select is set to these options, then

the respective curtain mode select will be considerate as Disabled.

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41D01C7 (F7) Page 17 of 17 02/04/30

Parameter # 22 : STAGE #

L2: STAGE # SENSOR SELECT

These parameters are used to establish the temperature that controls respective output. These

parameters can be set from 1 to 9. STAGE # 9-10 SENSOR SELECT are settings for curtain 1 and

curtain 2 respectively.

Outputs Sensor Select Modes:

1) SENSOR 1

2) SENSOR 2

3) SENSOR 3

4) SENSOR 1 & 2

5) SENSOR 1 & 3

6) SENSOR 2 & 3

7) ALL SENSORS

8) AVERAGE TEMPERATURE

9) AMBIENT SENSOR

Parameter # 23 : STAGE 7/8 OPTION

This parameter is used to establish the output type for stages 7 and 8. Stages 7 and 8 can be either relay

or variable stages, output can also be used for an inlet(s). If this parameter is set to 0 then stages 7 and 8

will be used as ON/OFF stages. If this parameter is set to 1 then stages 7 and 8 will be used as variable

stages. If this parameter is set to 2 then outputs will be used for inlet(s).

L2: AVG SENSOR SELECT

This parameter is used to establish the temperature that controls AVERAGE TEMPERATURE parameter.

This parameter can be set from 1 to 7.

Average Temperature Sensor Select Modes:

1) SENSOR 1

2) SENSOR 2

3) SENSOR 3

4) SENSOR 1 & 2

5) SENSOR 1 & 3

6) SENSOR 2 & 3

7) ALL SENSORS

Parameter # 24 : SOFTWARE VERSION

This parameter is used to display the configuration version.

SR-242 USER’S GUIDE

41D01C7 (F7) Page 18 of 18 02/04/30

9. $ODUP

The alarm relay is normally activated, but it will deactivate 26 sec or more after one of the following

events occurred:

a. SR-242 loses its power or is defective.

b. The AVERAGE TEMPERATURE exceeds the limits ALARM BAND (other conditions,

see parameter 7).

c. A sensor in is unplugged or defective.

Note: If an inside temperature sensor becomes defective (open / short circuit or unplugged),

the control will not compute this sensor for average temperature and the readout of this sensor

will be ERR.

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The following is a more detailed description of general purpose parameters which may or may not be

included in your configuration. The other parameters, which are easier to set, are briefly explained in the

section “Description of Parameters”.

10.1 Clock

The SR-242 comes with its own integrated time clock. This feature is appreciated by users who want to

know the current time of day. Note that if a power failure occurs, the clock will keep the time at which the

failure occurred. However, the time clock’s main purpose is to allow ramping and feed and water

consumption monitoring, as these events occur every 24 hours or at midnight each day.

The following instructions show how to change the time of day on the control:

The time is displayed in HH:MM format and does not flash. The and buttons serve no purposes.

L2: Minutes are flashing and can be adjusted with the and buttons.

L3: Hour is flashing and can be adjusted with the and buttons.

10.2 Probe

The following instructions show how to read the current sensor readings as well as the recorded high and

low.

The probe’s average value is displayed and does not flash. The and buttons serve no purposes. If

the gap between the recorded values is too great, the

Err

message will be displayed.

L2: Display a probe individual value. If there is more than one sensor, another sensor is displayed every

second. After 60 seconds, the parameter returns to the average.

L3: Display the recorded high and low. Press simultaneously the and buttons for 2 seconds to clear

the high and low. The

Clr

message appears for 2 seconds to confirm the clearing. Then, after 60

seconds, the parameter returns to the average.

SR-242 USER’S GUIDE

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11. 6XSSOHPHQWDU\,QIRUPDWLRQRQ&,

The air inlet(s) is equipped with a CI-1/24. A system with a CI-1/24 offers features such as:

-capability of self-operating the inlet(s) if the CI-1/24 loses contact with SR-242. Equipped with an inside

temperature probe, the CI-1/24 uses a range of preset temperature and a temperature-inlet(s) position

curve in order to control the openings. For this configuration, CI-1/24 will operate the inlet(s) or curtains in

backup as follow:

• below TARGET

TEMP +

STAGE 7 MIN, inlet(s) will open at position STAGE 7 MIN

OPEN

(

TARGET

TEMP and

STAGE 7 MIN OPEN is given by SR-242 before the

failure)

• equal to or above TARGET

TEMP, inlet(s) will modulate from the STAGE 7 MIN OPEN

to 100%

-can be used in either a time mode or in a potentiometer mode. If potentiometer mode has been chosen,

and the feedback is defective, the CI-1/24 automatically switches to time mode, thus allowing normal

operation until the problem is solved.

The following is a list of conditions that generate CI-1/24 malfunction:

- CI-1/24 temperature probe is defective,

- feedback potentiometer is either open or short circuit,

- Inlet(s) is moving the wrong way,

- Inlet(s) is blocked and/or miscalibrated.

If one of these conditions occurs for more than 5 minutes, no alarm will sound. The CI-1/24 will try to

continue to operate normally.

The following is a list of conditions that make the CI-1/24 to fall on backup mode:

- Communication link between SR-242 and the CI-1/24 is open,

- SR-242 is not powered.

If one of these conditions occurs for more than 5 minutes, no alarm will sound. The CI-1/24 will fall on

backup mode 30 seconds after the condition has occured.

Notes: - To completely close the inlet(s) in backup mode, the user must use the manual mode

of the CI-1/24.

- If the CI-1/24 has never correctly communicated with the SR-242 since its first

power up, the backup mode won't work correctly.

- The CI-1/24 must be correctly calibrated before using this configuration. (refer to

CI-1/24 for the calibrating procedures).

SR-242 USER’S GUIDE

41D01C7 (F7) Page 20 of 20 02/04/30

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DESCRIPTION CONTROL VALUES

*Restriction MIN MAX PRESET

1. AVERAGE TEMPERATURE °C(°F) -41.8 (-43.6) 74.4 (166.2) ***** *****

L2: Sensor °C(°F) -41.8 (-43.6) 74.4 (166.2) PRB 2-3-4 *****