EWAQ+EWYQ005~007ACV3P
Packaged air-cooled water chillers and
packaged reversible air to water heat pumps
4PW33165-1D
Installation manual
13
■
[1-03] Set point at high ambient temperature (Hi_Ti): the
target outgoing water temperature when the outdoor
temperature equals or rises above the high ambient
temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.
[3] Auto restart
When power returns after a power supply failure, the auto restart
function reapplies the user interface settings at the time of the power
supply failure.
Note that with the function disabled the schedule timer will not be
activated when power returns to the unit after a power supply failure.
Press the
pr
button to enable the schedule timer again.
■
[3-00] Status: defines whether the auto restart function is
turned ON (0) or OFF (1).
[9] Cooling and heating set points
The purpose of this field setting is to prevent the user from selecting
a wrong (i.e., too hot or too cold) leaving water temperature. Thereto
the heating temperature set point range and the cooling temperature
set point range available to the user can be configured.
■
[9-00] Heating set point upper limit: maximum leaving water
temperature for heating operation.
■
[9-01] Heating set point lower limit: minimum leaving water
temperature for heating operation.
■
[9-02] Cooling set point upper limit: maximum leaving water
temperature for cooling operation.
■
[9-03] Cooling set point lower limit: minimum leaving water
temperature for cooling operation.
Field settings table
T
t
Target water temperature
T
A
Ambient (outdoor) temperature
= Shift value
Lo_Ti
Lo_A
Hi_A
T
A
T
t
+ 05
00
- 05
Hi_Ti
Shift value
NOTE
It is therefore recommended to leave the auto restart
function enabled.
First
code
Second
code
Setting name
Installer setting at variance with default value
Default
value
Range
Step
Unit
Date
Value
Date
Value
0
User permission level
00
User permission level
3
2 ~ 3
1
—
1
Weather dependent set point
00
Low ambient temperature (Lo_A)
–10
–20 ~ 5
1
°C
01
High ambient temperature (Hi_A)
15
10 ~ 20
1
°C
02
Set point at low ambient temperature (Lo_Ti)
40
25 ~ 55
1
°C
03
Set point at high ambient temperature (Hi_Ti)
25
25 ~ 55
1
°C
2
Not available
3
Auto restart
00
Status
0 (ON)
0/1
—
—
4
Not available
5
Not available
6
Not available
7
Not available
8
Not available
9
Cooling and heating set point ranges
00
Heating set point upper limit
55
37 ~ 55
1
°C
01
Heating set point lower limit
25
25 ~ 37
1
°C
02
Cooling set point upper limit
20
18 ~ 20
1
°C
03
Cooling set point lower limit
5
5 ~ 18
1
°C
