Daikin EWAD120MBYNN1, Operation Manual

EWAD120~340MBYNN

Packaged air-cooled water chillers

4PW22683-1

Operation manual

18

A

NNEX 

I

Thermostat parameters

Inlet water temperature control

The figure below shows the thermostat diagram in case of inlet water
temperature control.

The default value and the upper and lower limits of the thermostat
parameters are listed in the table below.

■

If the temperature is below the setpoint, the thermostat control
will check every LOADDOWN TIMER. 
According to the deviation to the setpoint, no action, slow load
down (=–3%) or fast load down (=–7%) is required.

■

If the temperature is above the setpoint, the thermostat control
will check every LOADUP TIMER. 
According to the deviation to the setpoint, no action, slow load
up (=+3%) or fast load up (=+7%) is required.

A

NNEX

 II

Schedule timer example

To come to the schedule above following settings have to be made:

All days assigned to the same group will work according to the
settings of this group. 

In this example setting:

■

all Mondays, Tuesdays, Thursdays and Fridays will work
according to the settings in group 1 (

),

■

all Wednesdays will work according to the settings in group 2
(

),

■

all Saturdays and Sundays will work according to the settings in
group 3 (

"

),

■

all holiday days will work according to the settings in the holiday
group (

).

All group settings of groups 

, 

, 

"

, 

#

  and 

  work  similar as

following example (settings for group 1): 

INLET CONTROL

Default value

Lower limit

Upper limit

Step difference - a

(K)

0.8

(a)

(a) can only be modified in the service menu

–

–

Step difference - b

(K)

0.5

(a)

–

–

Steplength - c

(K)

0.2

(a)

–

–

Loadup timer

(sec)

48

12

300

Loaddown timer

(sec)

24

12

300

Setpoint

(°C)

12.0

7.0

23.0

OUTLET CONTROL

Default value

Lower limit

Upper limit

Step difference - a

(K)

0.8

(a)

(a) can only be modified in the service menu

–

–

Step difference - b

(K)

0.5

(a)

–

–

Steplength - c

(K)

0.2

(a)

–

–

Loadup timer

(sec)

12

12

300

Loaddown timer

(sec)

12

12

300

Setpoint

(°C)

7.0

4.0

16.0

c

b

c

c

b

c

a/2

a/2

Setpoint

Fast load up

Slow load up

No action

Slow load down

Fast load down

MARCH

MON

TUE

WED

THU

FRI

SAT

SUN

1

G1

2

G1

3

G2

4

G1

5

G1

6

G3

7

G3

8

G1

9

G1

10

G2

11

G1

12

G1

13

G3

14

G3

15

G1

16

G1

17

G2

18

G1

19

G1

20

G3

21

G3

22

G1

23

H

24

H

25

H

26

H

27

H

28

H

29

H

30

G1

31

G2

Screen 1

Screen 2

*,      

   "

  "

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14.0

°

C

6

8

12 13

15

18

20

12.0

°

C

Cooling inlet setpoint 1

On

Off

time (h)

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