Carrier 48TJE, TJF004, 48TJD Horizontal Discharge Block-Off Plate, Enthalpy Control Installation

BLOCK-OFF PLATE

Fig. 20 — Horizontal Discharge Block-Off Plate

U-SHAPED	ECONOMIZER					OAT
HOLE	CONTROL	ECONOMIZER	ECONOMIZER	TOP
					TOP	(TERMINALS ARE UP)
(NOT	BOARD	PLUG	MOTOR	SCREW
SHOWN)

UNIT

WIRING	OUTSIDE AIR
	SCREEN
HARNESS

BAROMETRIC

RELIEF DAMPER

SHIPPING

SCREW

POSITION SETTING	ENTHALPY
BRACKET	CONTROL

Fig. 21 — Durablade Economizer Installed in Unit

HOOD

OPEN

POSITIONMINIMUM

S

T

3

1

P

T1

4

2

5

P1

T ID

8 S

CONT

OR

CONT

%

1 R

Y

IMUH

9 U

UNPOWERED W

4

90

C

30

60

70

8

T

ACT

CTS

3

ENTHALPY

60

DAMPER

1

A

5A

TE H

2

m

10

D

CW

A

2

RA

SHO

TR

50

C

–

A

2

V

TINGS:

OUTDOOR

55

OPEN

SETPOINTS

M

ST

IGH

C

AV

B

N

A

VDC

1

A IN

CONTROL

F

5

CLOSED DAMPER

1

TR1

A

RUN,

7

.

ENTHALPY

°

1

IN

TEMP

65 70

–

A

IN

5A

CCW

1

3

T

.

.

80

85

2

REV.

97-367

B

C

D S

O

RE V .

B

TR

Fig. 23 — Outdoor-Air Thermostat/

Enthalpy Control Installation

Example:

Given — Negative Pressure. . . . . . . . . . . . . . . . . . . . . . . 0.2 in. wg

Outdoor Air . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 900 cfm

Determine — Setting = 5 in.

Fig. 22 — Durablade Economizer

Minimum Position Setting

14