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Economizer Controller

ACC-SVN203C-EN

SETPOINTS

EXH2 SET

75%

0 to 100%;

increment by 1

N/A

EXH2 SET is not available

SYSTEM

SETUP

INSTALL

(c)

1/1/2011

Present date

Display order = MM/DD/YY

Setting order = DD, MM, then YY

UNITS DEG

(c)

ºF

°F or °C

ºF

Sets economizer controller in degrees Fahrenheit or

Celsius

EQUIPMENT

(c)

CONV

CONV = conventional

HP is not available

AUX2 I

(c)

N/A

Shutdown (SD)

Heat (W1)

HP(O)

HP(B)

Heat (W1)

In CONV mode:

SD = Enables configuration of shutdown (default);

W = Informs controller that system is in heating

mode

NOTE: If using 2-speed fan mode, you must

program CONV mode for W. Shutdown is not

available in the two-speed fan mode

In HP O/B mode:

HP(O) = energize heat pump on Cool (default);

HP(B) = energize heat pump on Heat

FAN SPEED

(c)

1 speed

1 speed/

2 speed

See unit

nameplate:

Digit 15 = 0 or 1 - 1

speed;

Digit 15 = 7 or 9 - 2

speed

Sets economizer controller for operation of 1 speed

or 2 speed supply fan. The controller does not

control the fan but positions the OA and RA dampers

to the heating or cooling mode. See

page 23 for modes and position

NOTE: 2-speed fan option also needs Heat (W1)

programmed in AUX 2 In

FAN CFM

(c)

5000cfm

100 to 15000

cfm;

increment by

100

5000cfm

This is the capacity of the RTU. The value is found

in the Unit Catalog. The cfm of the fan is only used

with DCV CAL ENABLE AUO

AUX1 OUT

NONE

ERV

EXH2

SYS

NONE

AUX1 OUT is a programmable output used for

System Alarm output

OCC

(c)

INPUT

INPUT or

ALWAYS

When using a setback thermostat with occupancy

out (24 Vac), the 24 Vac is input “INPUT” to the OCC

terminal. If no occupancy output from the

thermostat then change program to “ALWAYS” OR

add a jumper from terminal R to OCC terminal

FACTORY DEFAULT

(c)

NO or YES

Resets all set points to factory defaults when set to
YES. LCD will briefly flash YES and change to NO but
all parameters will change to factory default values

ADVANCED

SETUP

MA LO SET

(c)

45ºF

35 to 55°F;

increment by 1°F

45ºF

Temp to activate Freeze Protection (close damper or
modulate to MIN POS if temp falls below set value)

FREEZE POS

(c)

CLO

CLO
MIN

CLO

Damper position when freeze protection is active

(closed or MIN POS)

ZERO

(c)

0ppm

0 to 500 ppm;

increment by 10

0ppm

ppm level to match CO

sensor start level. 0-

10 Vdc CO

sensors require CO2 ZERO to be 400

SPAN

(c)

2000ppm

1000 to 3000

ppm;

increment by 50

2000ppm

ppm span to match CO

sensor; e.g.; 500-1500

sensor output would be 500 CO

zero and 1000 CO

span. 0-10 Vdc CO

sensors require CO

SPAN to be

1600

STG3 DLY

2.0h

0 min, 5 min, 15

min, then 15

min intervals.

Up to 4h or OFF

2.0h

Delay after stage 2 for cool has been active. Turns

on 2nd stage of mechanical cooling when

economizer is 1st stage call and mechanical cooling

is 2nd stage call. Allows three stages of cooling, 1

economizer and 2 mechanical. OFF = no Stage 3

cooling

Table 4.

Controller menu structure (continued)

Menu Parameter

Parameter

Default

Value

Parameter
Range and

Increment

(a)

Parameter

Recommended

Value

(b)

Notes

Содержание BAYECON353 Series

Страница 1: ...knowledge and training Improperly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all precautions in the literature and on the tags stickers and labels that are attached to the equipment 0 to 100 Low Leak Economizer Downflow Foundation Packaged Cooling and Gas Electric 3 to 5 Tons Installation Instructio...

Страница 2: ...uipment that is used in these service procedures In addition some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants Know the applicable laws and follow them WARNING Proper Field Wiring and Grounding Required Failure to follow code could result in death or serious injury All field wiring MUST be performed by qualified p...

Страница 3: ... Trane personnel should always follow local regulations Introduction ACC SVN203C EN 3 Copyright This document and the information in it are the property of Trane and may not be used or reproduced in whole or in part without written permission Trane reserves the right to revise this publication at any time and to make changes to its content without obligation to notify any person of such revision o...

Страница 4: ...on Field Set Up 11 Economizer Controller 12 Controller User Interface and Keypad 12 Sequence of Operation 18 Initiation of Operating Modes 19 Economizer Setup and Configuration Field and Factory Installed Option 19 Enthalpy Settings 20 Powered Exhaust 21 CO2 Sensor 21 Occupancy Sensor 21 Checkout 21 Troubleshooting 22 Fault Detection Diagnostics FDD Certifica tion 22 ...

Страница 5: ...an immediate joint inspection of the damage by the carrier and the consignee Note Do not attempt to repair any damaged parts until the parts are inspected by the carrier s representative Parts List Table 1 lists components shown in Figure 1 and Figure 2 p 6 Table 1 Major economizer component list Component Description 1 Low leak economizer assembly 2 End panel 3 Filter access door 4 Panel Fresh ai...

Страница 6: ...h screws 15 13 12 10 14 16 11 2 6 1 7 Figure 2 Major economizer components factory installed options a 1 10 4 5 9 7 6 8 Bag with items 11 12 13 14 15 and 16 General Information 6 ACC SVN203C EN a Mixed air temperature sensor and bracket are already installed in unit for factory installed option ...

Страница 7: ...nor to moderate injury and equipment damage Field Installed Option WARNING Hazardous Voltage w Capacitors Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury Disconnect all electric power including remote disconnects and discharge all motor start run capacitors before servicing Follow proper lockout tagout procedures to ensure the power can...

Страница 8: ...See Figure 7 Figure 7 Mating connector plug removal 6 Remove unit top cover and control box access panel Route relay harness as shown in Figure 8 a Locate economizer fault relay EFR wire harness wires 163A and 164A looped near economizer section b Secure unterminated end of the harness with a wire tie in the control panel to the left side of the power terminal block near the Customer Connection LT...

Страница 9: ...ff removal 8 Install gasket on mist eliminator bracket Assembly mist eliminator bracket onto end panel using five screws See Figure 10 Figure 10 Gasket installation 9 Install the fresh air hood build in Step 3 on unit using nine screws and filter access door assembly using 13 screws See Figure 11 Figure 11 Fresh air hood installation Access Panel Control Box Access Panel Top Cover EFR Economizer F...

Страница 10: ...ch mixed air sensor to bracket using the two screws 3 Remove mixed air sensor wire harness from the bag item 14 Connect harness to the economizer controller MAT pin 4 Route the mixed air sensor wire harness through the bushing located at the top of the evaporator coil and connect to the sensor Figure 13 Mixed air temperature sensor installation Seal along with fresh air hood Flanges Seal along wit...

Страница 11: ...ge the gear train and motor beyond repair Never turn the motor shaft by hand or with a wrench Each economizer ships inside the unit and requires partial assembly and setup in the field 1 Remove economizer end panel and filter access door See Figure 14 Figure 14 Access panel removal 2 Remove items 4 5 6 7 8 9 10 12 and 13 from the economizer section as shown in Figure 15 Figure 15 Economizer parts ...

Страница 12: ...Type Description Top Left Terminal Block MAT MAT 20k NTC and COM Mixed Air Temperature Sensor polarity insensitive connection OAT OAT 20k NTC and COM Outdoor Air Temperature Sensor polarity insensitive connection S BUS S BUS SYLK Bus Sylk Bus Sensor polarity insensitive connection Bottom Left Terminal Block IAQ 2 10 2 10 Vdc Air Quality Sensor Input e g CO2 sensor IAQ COM COM Air Quality Sensor Co...

Страница 13: ...non volatile RAM CHANGE STORED displays Press the button Menu Up to return to the menu list Time out and Screensaver When no buttons have been pressed for 10 minutes the LCD displays a screensaver which cycles through the Status items Each Status item displays in turn and cycles to the next item after 5 seconds Controller Menu Structure Important Table 4 p 14 illustrates the complete hierarchy You...

Страница 14: ...temperature Displays F if sensor sends invalid value if not connected short or out of range OA HUM c _ _ 0 to 100 N A Displays measured value of outdoor humidity from OA Sylk Bus sensor Displays if not connected short or out of range RA TEMP c _ _ _ ºF 0 to 140 F N A Displays measured value of return air temperature from RA Sylk Bus sensor Displays F if sensor sends invalid value if not connected ...

Страница 15: ...maintain a space ppm level below the setpoint MIN POS c 2 8 V 2 to 10 Vdc 2 8V 3 2V LO 2 8V HI Displays ONLY if a CO2 sensor is NOT connected With 2 speed fan units MIN POS L low speed fan and MIN POS H high speed fan settings are required Default for MIN POS L is 3 2V and MIN POS H is 2 8V VENTMAX c 2 8 V 2 to 10 Vdc or 100 to 9990 cfm increment by 10 2 8V 3 2V LO 2 8V HI Displays only if a CO2 s...

Страница 16: ...ut used for System Alarm output OCC c INPUT INPUT or ALWAYS ALWAYS When using a setback thermostat with occupancy out 24 Vac the 24 Vac is input INPUT to the OCC terminal If no occupancy output from the thermostat then change program to ALWAYS OR add a jumper from terminal R to OCC terminal FACTORY DEFAULT c NO NO or YES NO Resets all set points to factory defaults when set to YES LCD will briefly...

Страница 17: ... CAL is not available 2SP FAN DELAY c 5 Minutes 0 to 20 minutes in 1 minute increments 5 Minutes When in economizing mode this is the delay for the high speed fan to try to satisfy the call for second stage cooling before the first stage mechanical cooling is enabled CHECKOUT DAMPER VMIN HS N A N A N A Positions damper to VMIN position DAMPER VMAX HS LS c N A N A N A Positions damper to VMAX posit...

Страница 18: ...ull Open Closed to Full Open On High 24 v On VENTMIN to Full Open Closed to Full Open ALARMS _ e MAT SENS ERR N A N A N A CO2 SENS ERR c N A N A N A OAT SENS ERR c N A N A N A DA ENTHL ERR N A N A N A DA ENTHL ERR is not available SYS ALARM N A N A N A When AUX1 O is set to SYS and there is any alarm the AUX1 O terminal has 24 Vac out ACT UNDER V c N A N A N A Voltage received by Actuator is above...

Страница 19: ...BLB SET setting or by the thermostat initiating a call to cool when the damper is at 100 open The Economizer mode is controlled by the MAT getting above the MAT SET setting while the OAT is below the DRYBLB SET setting While the fans are not controlled by the controller the Fan mode is dependent on what state the system is in OCC or Y1 states will cause the damper to go to a LOW fan speed damper s...

Страница 20: ...sing the enthalpy Sylk Bus sensors there will be a slight delay while the controller and the sensor communicate Analog sensors do not communicate on the Sylk Bus and output a 20k ohm signal to the controller with an instantaneous response time Table 9 Single enthalpy and dual enthalpy boundaries parameters ES1 through ES5 Enth Curve Temp dry Bulb ºF Temp dew point ºF Enth btu lb da Point P1 Point ...

Страница 21: ...tions The controller will then operate in the occupied mode every time the indoor fan is running Checkout WARNING Hazardous Voltage Failure to disconnect power before servicing could result in death or serious injury Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Inspect all ...

Страница 22: ...advertently energized NOTICE Compressor Damage Be sure to allow enough time for compressor start up and shutdown between checkout tests so that you do not short cycle the compressors The economizer controller provides alarm messages that display on the 2 line LCD If one or more alarms are present and there has been no keypad activity for at least 5 minutes the Alarms menu displays and cycles throu...

Страница 23: ...Figure 18 Ultra low leak economizer wiring diagram Economizer Controller ACC SVN203C EN 23 ...

Страница 24: ...cations without notice We are committed to using environmentally conscious print practices Trane and American Standard create comfortable energy efficient indoor environments for commercial and residential applications For more information please visit trane com or americanstandardair com ACC SVN203C EN 11 Sep 2021 Supersedes ACC SVN203B EN Apr 2020 ...

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