Trane BAYENTH001A Istruzioni per il montaggio

ACC-SVN85B-EN

IMPORTANT --

This is customer property and is to remain with this unit. Please return to service information pack upon

completion of work.

General Information:

The solid state enthalpy sensor is used with a solid state

economizer actuator motor.

▲WARNING: TO PREVENT INJURY OR DEATH

DUE TO ELECTRICAL SHOCK OR CONTACT WITH MOVING

PARTS. LOCK UNIT DISCONNECT SWITCH IN OPEN

POSITION BEFORE SERVICING UNIT.

Model:

BAYENTH001A Enthalpy Sensor Control

Used With:

BAYECON054,55&73

BAYECON086A,088A

BAYECON101,102,103,104A

BAYECON200,201,203,204A

Installation For BAYECON054,055

Downflow Discharge Economizer:

INSTALLER'S

GUIDE

ALL phases of this installation must comply with

NATIONAL, STATE AND LOCAL CODES.

SINGLE

ENTHALPHY

SENSOR

Library

Product Section

Product

Model

Literature Type

Sequence

Date

File No.

Supersedes

Service Literature

Unitary

Unitary Accessories

Econ., Dmprs., Motors, Low Ambient

Installer's Guide

January 2008

ACC-SVN85B-EN 01/08

ACC-SVN85A-EN 11/06

Single Enthalpy Sensor (Outdoor Air Only)

1. Units with economizers already installed: When

installing the enthalpy sensor after the economizer has

been installed remove the economizer/filter access panel

located on the return side of the unit.

2. Remove the two screws securing the disk type thermo-

stat to the top of the motor deck.

3. Next, disconnect the wires 56A and 50A(YL) from the

thermostat.

Contents

General Information................................................................. 1

BAYECON054,055 (Downflow) ............................................... 1

Differential ........................................................................ 2

BAYECON073 (Horizontal) ..................................................... 3

Differential ........................................................................ 3

BAYECON086,088 (Downflow) ............................................... 4

Differential ........................................................................ 4

BAYECON086,088 (Horizontal) .............................................. 5

Differential ........................................................................ 5

BAYECON101,102,103,104 (Downflow) ................................. 6

BAYECON200,201,203,204 (Horizontal) .................................. 7

Operation (All Economizers) .................................................... 8

Checkout/Troubleshooting ....................................................... 9

Wiring (054,055,086,088) ....................................................... 10

Wiring (101,102,103,104) ....................................................... 11

Wiring (

200,201,203,204) ........................................................ 12

INSTALLER'S GUIDE

page 2

4. Using the two screws removed in step 2, mount the

Enthalpy sensor in the thermostat's previous location,

see figure 2.

5. Connect wire 56A to S and 50A(YL) to + terminals on the

Enthalpy Sensor.

6. On the Control Module (Solid State Economizer Logic

Module) attached to the Economizer Motor, remove the

red resistor from terminals SRand + and discard. See

figure 4.

7. Remove the white resistor from between the SOterminal

and wire 56A. Than install the white resistor across the

SRand + terminals

8. Install the terminal adaptor provided with the sensor on

terminal SOof the Control Module and connect wire 56A

to it.

9. Replace the economizer/filter access panel.

Installation for Differential Enthalpy

Sensing (Outside Air & Return Air)

1. Complete the procedures for installing a single enthalpy

sensor.

2. Mount the second enthalpy sensor on the bottom side of

the motor deck, see figure 3.

3. Remove the knockout located below the Economizer

Motor and insert a snap bushing.

4. Install field supplied wires through the snap bushing

DIFFERENTIAL

ENTHALPY SENSOR

SCREWS

M9097_1_

ENTHALPY CHANGEOVER

SETPOINT

LED LIGHTS WHEN

OUTDOOR AIR IS SUITABLE

FOR FREE COOLING

JUMPER USED FOR SINGLE ENTHALPY CONTROL.

TR TR1

C7400

(R4) WHITE

620 OHM

JUMPER

W7459D

MIN.

POS.

OPEN

M9097_2_

ENTHALPY CHANGEOVER

SETPOINT

LED LIGHTS WHEN

OUTDOOR AIR IS SUITABLE

FOR FREE COOLING

TR TR1

C7400

W7459D

C7400

MIN.

POS.

OPEN

M9097_W/O

LED LIGHTS WHEN

OUTDOOR AIR IS SUITABLE

FOR FREE COOLING

TR TR1

(R1) RED

750 OHM

JUMPER

W7459D

(R4) WHITE

620 OHM

JUMPER

MIN.

POS.

OPEN

DISK TYPE

THERMOSTAT

Control Module before Installation

Control Module with One Enthalpy Sensor

Control Module with Two Enthalpy Sensors

INSTALLER'S GUIDE

page 3

Single Enthalpy Sensor (Outdoor Air Only)

1. Units with economizers already installed: When

installing the enthalpy sensor after the economizer has

been installed remove the economizer rain hood.

2. Remove the two screws securing the disk type thermo-

stat on the damper side of the economizer.

3. Next, disconnect the wires 56A and 50A(YL) from the

thermostat.

4. Using the two screws removed in step 2, mount the

Enthalpy sensor on the outside face of the economizer.

See figure below.

5. Connect wire 56A to S and 50A(YL) to + terminal on the

Enthalpy sensor.

6. Remove the filter access panel on the return side of the

unit reach into the Control Module attached to the

Economizer Motor, remove the red resistor from termi-

nals SRand + and discard. See figure 4.

7. Remove the white resistor from between the SOterminal

and wire 56A. Than install the white resistor across the

SRand + terminals

665184

8. Install the terminal adaptor provided with the sensor on

terminal SOof the Control Module and connect wire

56A to it.

9. Reinstall the rain hood and filter access panel.

Installation for Differential Enthalpy

Sensing

1. Complete the procedures for installing a single enthalpy

sensor.

2. Mount the second enthalpy sensor in the return air

stream. See figure below.

4. Install field supplied wires through from terminals S

and + on the return enthalpy sensor to the SRand +

terminals on the Control Module.

6. On the Control Module (Solid State Economizer Logic

Module) attached to the Economizer Motor, remove the

white resistor from between the SRterminal and the +

terminal. Then connect the wire from S on the sensor to

SRon the Control Module and + on the sensor to + on the

Control Module.

Installation for BAYECON073 Horizontial Discharge Economizer:

INSTALLER'S GUIDE

page 4

Installation for BAYECON086A,

BAYECON088A

Downflow Discharge

Single Enthalpy Sensor (Outdoor Air

Only)

1. Units with economizers already installed: When

installing the enthalpy sensor after the economizer

has been installed remove the economizer/filter

access panel located on the front side of the unit.

Remove the mist eliminator and retaining angle from

the economizer.

2. Remove the two screws securing the disk type

thermostat to the rear panel.

3. Disconnect the wires 182A(YL) and 183A(YL) from

the thermostat.

4. Locate bushing supplied with kit and pull wires

182A(YL) and 183A(YL) through bushing. Snap

bushing into the hole where the thermostat was

removed.

5. Connect wire 182A(YL) to S and 183A(YL) to +

terminals on the Enthalpy Sensor.

6. Using the two screws removed in step 2, mount the

Enthalpy sensor ajacent to thermostat’s previous

location, Engagement holes are provided.

7. On the Control Module (Solid State Economizer Logic

Module) attached to the Economizer Motor, remove

the red resistor from terminals SR and + and discard.

See figure 4.

8. Remove the white resistor from between the SO

terminal and wire 182A(YL). Then install the white

resistor across the SR and + terminals

9. Install the terminal adaptor provided with the sensor

on terminal SO of the Control Module and connect

wire 182A(YL) to it.

10. Replace the economizer/filter access panel and mist

eliminator.

Installation for Differential Enthalpy

Sensing (Two Sensors)

1. Complete the procedures for installing a single

enthalpy sensor.

2. Mount the second enthalpy sensor on the bottom side

of the Return Air Bolckoff.

3. Remove the knock-out located near the front side of

the Return Air Bolckoff and insert a snap bushing.

4. Install field supplied wires through the snap bushing

from terminals S and + on the return enthalpy sensor

to the SR and + terminals on the Control Module.

5. On the Control Module attached to the Economizer

Motor, remove the white resistor from between the

SR terminal and the + terminal and discard. Then

connect the wire from S on the sensor to SR on the

Control Module and + on the sensor to + on the

Control Module.

INSTALLER'S GUIDE

page 5

Installation for BAYECON086A,

BAYECON088A

Horizontal Discharge

Single Enthalpy Sensor (Outdoor Air

Only)

1. Units with economizers already installed:

When installing the enthalpy sensor after the

economizer has been installed remove the econo-

mizer/filter access panel located on the front side of

the unit. Remove the mist eliminator and retaining

angle from the economizer.

2. Remove the two screws securing the disk type

thermostat to the rear panel.

3. Disconnect the wires 182A(YL) and 183A(YL) from

the thermostat.

4. Locate bushing supplied with kit and pull wires

182A and 183A) through bushing. Snap bushing

into the hole where the thermostat was removed.

5. Connect wire 182A to S and 183A to + terminals on

the Enthalpy Sensor.

6. Using the two screws removed in step 2, mount the

Enthalpy sensor ajacent to thermostat’s previous

location, Engagement holes are provided.

7. On the Control Module (Solid State Economizer

Logic Module) attached to the Economizer Motor,

remove the red resistor from terminals SR and +

and discard.

8. Remove the white resistor from between the SO

terminal and wire 182A. Then install the white

resistor across the SR and + terminals

9. Install the terminal adapter provided with the sensor

on terminal SO of the Control Module and connect

wire 182a to it.

10. Replace the economizer/filter access panel and mist

eliminator.

Installation for Differential Enthalpy

Sensing (Two Sensors)

1. Complete the procedures for installing a single

enthalpy sensor.

2. Mount the second enthalpy sensor on the side of the

return air hood

3. Remove the knock-out located near the front side of

the Return Air Bolckoff and insert a snap bushing.

4. Install field supplied wires through the snap bushing

from terminals S and + on the return enthalpy sensor

to the SR and + terminals on the Control Module.

5. On the Control Module attached to the Economizer

Motor, remove the white resistor from between the

SR terminal and the + terminal and discard. Then

connect the wire from S on the sensor to SR on the

Control Module and + on the sensor to + on the

Control Module.

INSTALLER'S GUIDE

page 6

Installation for BAYECON101, BAYECON102,

BAYECON103, BAYECON104A

Down Discharge

Single Enthalpy Sensor Control (Outdoor Air Only)

1. Units with economizers already installed: When

installing the Enthalpy Sensor Control (ESC) after the

economizer has been installed remove the COIL ACCESS

panel. Remove the mist eliminator.

2. Remove the two screws securing the outdoor air sensor

(OAS) to the rear panel.

3. Disconnect the YL/BK and YL wires from the OAS.

4. Retain the screws for later use and discard the OAS

removed in steps 2 & 3.

5. Using the two screws removed in step 2, mount the ESC

adjacent to the previous location of the OAS. Engagement

holes are provided.

6. Connect the YL/BK wire to S and the YL wire to + termi-

nal on enthalpy sensor.

7. Reinstall the mist eliminator.

8. On the Control Module (Solid State Economizer Logic Mod-

ule) attached to the Economizer Motor, remove the red

resistor from terminals SRand + and discard. See figure 4.

9. Remove the white resistor from between the SOterminal and

wire 56A. Then install the white resistor across the SRand

+ terminals

10. Install the terminal adaptor provided with the sensor on

terminal SOof the Control Module and connect wire 56A to

it.

INSTALLER'S GUIDE

page 7

Installation for BAYECON200, BAYECON201,

BAYECON203, BAYECON204A

Horizontal Discharge

Single Enthalpy Sensor (Outdoor Air Only)

1. Units with economizers already installed: Remove hood

from economizer to access outdoor air sensor (OSA) and

install Enthalpy Sensor Control (ESC). Remove COIL

ACCESS panel to access Control Module (Solid State

Economizer Logic Module).

2. Remove the two screws securing the OSA to the economizer.

3. Disconnect the YL/BK and YL wires from the OSA.

4. Retain the screws for later use and discard the OSA

removed in steps 2 & 3.

5. Install ESC on mounting bracket located in the upper

corner of the hood using the screws removed in step 2.

6. Re-install hood on economizer.

7. Remove top mist eliminator in hood and connect the YL/BK

wire to S and the YL wire to + terminal on ESC.

8. Re-install mist eliminator into hood.

9. On the Control Module attached to the Economizer Motor,

remove the red resister from terminals S(R) and + and

discard.

10. Remove the white resistor from between the S(O) terminal

and wire 56A. Then install the white resistor across the

S(R) and + terminals.

11. Install the terminal adaptor provided with the sensor on

terminal S(O) of the Control Module and connect wire 56A

to it.

Printed from D74521G01

Mounting Bracket

Economizer Hood

INSTALLER'S GUIDE

page 8

Operation (All Economizers)

Controller Dial Setting

Control set point scale is located on the Control Module,

see Figure 4 on page 2. Control points A, B, C, D are field

selectable, and are used for single enthalpy sensing.

The Solid State Enthalpy Sensor is used with a solid state

economizer control and damper actuator to proportion an

outdoor air damper in a ventilation system.

When using a single enthalpy control setpoint A, B, C,

or D combines temperature and humidity conditions re-

sulting in the control curve shown on the psychrometric

chart below.

When the enthalpy of the outdoor air is below (left of) the

appropriate curve, the outdoor air damper can proportion

open on a call for cooling. If the outdoor air enthalpy rises

above (right of) the control curve, the outdoor air damper

will close to minimum position.

For differential enthalpy, you must turn the control set

point past D (fully clockwise). Differential enthalpy is not

available for 101,102,103,104 Economizers.

If the outdoor air enthalpy is lower than the return air

enthalpy, the outdoor air damper will proportion open on

a call for cooling.

If the outdoor air enthalpy is higher than the return air

enthalpy, the outdoor air damper will close to minimum

position.

If the outdoor air enthalpy and return air enthalpy are

equal, the outdoor air damper will proportion open on a call

for cooling.

CONTROL

CURVE

CONTROL POINT

APPROX. F ( C)

AT 50% RH

73 (23)

70 (21)

67 (19)

63 (17)

12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46

100

ENTHALPY—BTU PER POUND DRY AIR

(29)

(32)

(35)

100

(38)

105

(41)

110

(43)

(2)

(4)

105

(41)

110

(43)

(7)

(10)

(13)

(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

100

(38)

APPROXIMATE DRY BULB TEMPERATURE— F ( C)

M11681

RELATIVE HUMIDITY (%)

HIGH LIMIT CURVE FOR W7459D.

INSTALLER'S GUIDE

page 9

ENTHALPY

SENSOR

SPRAY SMALL AMOUNT OF COOLANT INTO UPPER

LEFT CORNER VENT OF ENTHALPY SENSOR

CASE TO SIMULATE LOW ENTHALPY

FOR CHECKOUT.

ENVIRONMENTALLY SAFE

COOLANT, SUCH AS

ENVI-RO-TECH 1672-10S

M12163

Checkout and Troubleshooting

Checkout Procedure for Sin

le Senso

Response

A. Make sure enthalpy sensor is connected to SO and +. The white

resistor must be placed on SR and +.

1. Turn enthalpy set point on Economizer Logic Module to “A”

1) LED (light -emitting

diode) turns on within a

minute.

2. With power connected, spray a small amount of envronmentally

safe coolant in upper left vent of sensor to simulate low enthalpy

conditions. (See figure 12)

2) Terminals 2, 3 closed.

Terminals 1, 2 open

B. Disconnect power at TR and TR1. Terminals 2, 3 open.

Terminals 1, 2 closed.

A. 1. Turn enthalpy set point on Economizer Logic Module past “D”

(full clockwise). 1) LED turns off.

2. With power connected, spray a small amount of environmentally

safe coolant into upper left vent of sensor connected to SO and +

to simulate low outdoor air enthalpy. (See figure 12).

2) Terminals 2, 3 closed.

Terminals 1, 2 open.

B. Spray small amount of environmmentally safe coolant in upper left

vent of return air enthalpy sensor connected to SR and + to simulate

low return air enthalpy.

1) LED turns off.

2) Terminals 2, 3 open.

Terminals 1, 2 closed.

Checkout procedure for Differential Enthalpy

(Second enthalpy sensor connected to terminals “SR” and “+”)

INSTALLER'S GUIDE

page 10

Enthalpy Sensor Wiring When Used With

BAYECON054,055 & 73

BAYECON086A,088A

ECONOMIZER W/OPTIONAL OUTDOOR ENTHALPY SENSOR

ECONOMIZER W/OPTIONAL DIFFERENTIAL ENTHALPY SENSORS

(182A)

(183A)

(182A)

(183A)

(GREEN)

Installer Note: Please Check Installed Option

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