To Next Page

To Previous Page

JOHNSON CONTROLS

181

SECTION 8 – UNIT OPERATION

FORM 150.72-ICOM6

ISSUE DATE: 08/03/2022

TABLE 25 - YLAA STANDARD CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY (2,

3, OR 4 FANS PER SYSTEM)

FAN

STAGE

ON* OFF**

IPUII I/O OUTPUT

FAN

CONTACTOR

FAN #

SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2

DP > PROGRAMMED

FAN CONTROL ON

PRESSURE

DP < PROGRAMMED

FAN CONTROL ON

PRESSURE MINUS

PROGRAMMED

DIFFERENTIAL

PRESSURE

7B7-8 TB10-8 1-KF1 2-KF1 1-MF1 2-MF2

DP > PROGRAMMED

FAN CONTROL ON

PRESSURE AND

FAN STAGE 1 IS

ENERGIZED

DP < PROGRAMMED

FAN CONTROL ON

PRESSURE MINUS

PROGRAMMED

DIFFERENTIAL

PRESSURE AND

FAN STAGE 1 IS

ENERGIZED

TB7-8

and

TB7-9

TB10-8

and

TB10-9

1-KF1

and

1-KF2

2-KF1

and

2-KF2

1-MF1

and

1-MF2

2-MF1

and

2-MF2

DP > PROGRAMMED

FAN CONTROL ON

PRESSURE AND FAN

STAGES 1 AND 2 ARE

ENERGIZED

DP < PROGRAMMED

FAN CONTROL ON

PRESSURE MINUS

PROGRAMMED

DIFFERENTIAL

PRESSURE AND FAN

STAGES 1 AND 2

ARE ENERGIZED

TB7-8

and

TB7-9

and

TB7-10

TB10-

8 and

TB10-9

and

TB10-10

1-KF1

and

1-KF2

and

1-KF3

2-KF1

and

2-KF2

and

2-KF3

3 FAN:

1-MF1

and

1-MF2

and

1-MF3

4 FAN:

1-MF1

and

1-MF2

and

1-MF3

and

1-MF4

3 FAN:

2-MF1

and

2-MF2

and

2-MF3

4 FAN:

2-MF1

and

2-MF2

and

2-MF3

and

2-MF4

* When a fan stage is turned on, the pressure for the next stage is increased 20 PSIG and ramped back to the programmed on pressure over

the next 20 seconds.

** When a fan stage is turned o󰀨 (Programmed ON pressure minus the di󰀨erential), the OFF pressure for the next stage is decreased 20 psig

and ramped back to the programmed OFF pressure minus the di󰀨erential.

The time delay (fan delay timer) between

turning fan stages on and o is xed at

5 seconds.

Brand	York
Model	YLAA0080
Category	Chiller
Language	English

York YLAA0080 User Manual

Table of Contents

Other manuals for York YLAA0080

Questions and Answers:

York YLAA0080 Specifications

Related product manuals