Daikin EWLD120MBYNN, Operation Manual

Page: 21 / 24

EWLD120~540MBYNN
Condenserless water-cooled water chillers
4PW22687-1
Operation manual
20
A
NNEX
I
Thermostat parameters
Inlet water temperature control/outlet water temperature
control
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
Floating setpoint working
The diagram and table below show the default value and the upper
and lower limits of the floating setpoint parameters on the evaporator.
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
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
Floating setpoint Default value Lower limit Upper limit
Maximum value
(°C)
3.0 0.0 5.0
D1
(°C)
20.0 20.0 43.0
D2
(a)
(a) rise in floating setpoint value for 10°C drop in ambient
(°C)
5.0 0.0 10.0
0
°
C
5
°
C
D2
D1
Max, value
Ambient