Daikin EWWD120MBYNN, Operation Manual

Page: 22 / 24

Operation manual
21
EWWD120~540MBYNN
Packaged water-cooled water chillers
4PW22685-1
A
NNEX
I
Thermostat parameters
Cooling inlet water temperature control of evaporator/outlet
water temperature control of evaporator
The figure below shows the thermostat diagram.
The default value and the upper and lower limits of the thermostat
parameters are listed in the table below.
Heating inlet water temperature control of condenser
The figure below shows the thermostat diagram.
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 set-
tings of this group.
In this example setting:
■
all Mondays, Tuesdays, Thursdays and Fridays will work accord-
ing 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
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)
30 15 50
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
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
()
#
#
() $ $#
$#$# ,$#
$$$$$ $$$$
$#$$$$ $$$$
14.0
°
C
6 8 12 13 15 18 20
12.0
°
C
Cooling inlet setpoint 1
On
Off
time (h)
() $ $#
$&1$$ $
$&1$$ $$$
#$/1$$ %$
() $% $&
%1$$ $$$
'#1$$ $$$
&$1$$ $$$