Controller Parameter Settings
Display
When the unit is switched on the display shows “- - -” for a period of
five seconds, during which the controller performs a self check. The
display then shows the air temperature measured by probe 1.
The coil temperature, measured by probe 2 may be viewed by pressing
[
].
Access to the control parameters is achieved by pressing in sequence
[
]
+
[
]
+
[
]
and holding in keys for a period of 4
seconds.
It is possible to scroll through the parameters by pressing —
[
]
or
[
]
.
The value of a selected parameter is checked by pressing -
[
]
and
may be altered by pressing at the same time
[
]
+
[
]
or
[
]
.
Exit from setup occurs after 10 seconds if no key is pressed.
If an alarm condition is entered the alarm buzzer will sound and
‘
ALM
’
will flash on the display. The alarm may be acknowledge by
pressing
any key causing the buzzer to cease and the display will alternate
between ‘
ALM
’ and air temperature while the alarm condition
persists.
Display
Parameter
LDU151E-B
Duet High Temp
Default Values
Used in Panels F,H,L.
SCL
Readout Scale
2°C
2°C
SPL
Minimum Temperature Set Point
05
0
SPH
Maximum Temperature Set Point
01
8
SP
Effective Temperature Set Point
03
2
HYS
Hysteresis
3
+3
CRT
Compressor Rest Time (minutes)
10
2
CDC
Compressor Regulation with T1 Fail
20
7
DFR
Defrosting Frequency (/24 hours)
4
4
DTO
Defrosting Duration (minutes)
20
15
DDY
Defrost Display Control
1
1
ATL
Low Alarm Differential
-5
-5
ATH
High Alarm Differential
5
10
ATD
Temperature Alarm Delay (minutes)
60
90
ACC
Condenser Clean Interval
05
0
OAU
Auxiliary Output Mode of Operation
30
ALR
BAU
Auxiliary Button Mode of Operation
05
NON
OS1
T1 Offset
00
00
SIM
Display Slowdown
00
00
ADR
Address
01
01
ALARMS AND WARNINGS
HI
High Temperature Alarm
LO
Low Temperature Alarm
E1
T1 Probe Failure
DF
Defrosting in Progress
CLN
Condenser
LDU 151E-BG Electrical Connections
DUET ‘HV’ AND ‘GP’ SERIES
DA
TA
PWR
AUX
T1
1
2
3
4
5
6
7
8
9
10
11
FTG Cooler Dimensions
LIQUID AND SUCTION LINE PIPE SIZE
Model
32°C Ambient
Liquid Line Pipe Size
Suction Line Pipe Size
Horizontal (Vertical)
Duet
20m
50m
20m (V)
50m (V)
1-1 H/M
3/8”
3/8”
1/2” 1/2”
5/8” 1/2”
2-1 H/M
3/8”
3/8”
5/8” 1/2”
5/8” 1/2”
3-1 H/M
3/8”
3/8”
5/8” 1/2”
5/8” 1/2”
4-3 H/M
3/8”
3/8”
7/8” 3/4”
7/8” 3/4”
5-3 H/M
3/8”
3/8”
7/8” 3/4”
11/8” 7/8”
6-3 H/M
3/8”
3/8”
11/8” 7/8” 11/8” 7/8”
1-1 L
3/8”
3/8”
5/8” 1/2”
3/4” 5/8”
2-1 L
3/8”
3/8”
3/4” 5/8”
7/8” 3/4”
3-3 L
3/8”
3/8”
7/8” 3/4”
7/8” 3/4”
4-3 L
3/8”
3/8”
7/8” 3/4”
11/8” 7/8”
5-3 L
3/8”
3/8”
11/8” 7/8” 13/8” 11/8”
6-3 L
1/2”
1/2”
13/8” 11/8” 13/8” 11/8”
Note:
These are guidelines only. Exact pipe sizing to be carried out for each application.
“H” models include HV and GP range
“M” models include C, F and M range
“L” models
The exact pipe size should be determined by application.
Recommended maximum vertical change 5 metres. The suction lines have been selected to achieve a pressure drop of 2psi or less whilst maintaining refrigerant velocity in the horizontal
plane of 3.5m/s (700ft/min) and in the vertical plane of 7.0m/s (1500ft/min) to achieve oil return.
Model
43°C Ambient
Liquid Line Pipe Size
Suction Line Pipe Size
Horizontal (Vertical)
Duet
20m
50m
20m (V)
50m (V)
1-1 H/M
3/8”
3/8”
1/2” 1/2”
5/8” 1/2”
2-1 H/M
3/8”
3/8”
5/8” 1/2”
5/8” 1/2”
3-1 H/M
3/8”
3/8”
5/8” 1/2”
5/8” 1/2”
4-3 H/M
3/8”
3/8”
7/8” 3/4”
7/8” 3/4”
5-3 H/M
3/8”
3/8”
7/8” 3/4”
11/8” 7/8”
6-3 H/M
3/8”
3/8”
11/8” 7/8” 11/8” 7/8”
1-1 L
3/8”
3/8”
5/8” 1/2”
3/4” 5/8”
2-1 L
3/8”
3/8”
3/4” 5/8”
7/8” 3/4”
3-3 L
3/8”
3/8”
7/8” 3/4”
7/8” 3/4”
4-3 L
3/8”
3/8”
7/8” 3/4”
11/8” 7/8”
5-3 L
3/8”
3/8”
11/8” 7/8” 13/8” 11/8”
6-3 L
1/2”
1/2”
13/8” 11/8” 13/8” 11/8”
10
7
LIQUID AND SUCTION VALVE HEXAGONAL WRENCH SIZE
3/8” valve = 5mm
1/2” valve = 5mm
5/8” valve = 5mm
7/8” valve = 10mm
