Standard data - OP-UPAC015COP04E for showcase
Outside
temperature
(˚C)
Evaporation
temperature
(˚C)
Compressor
Rotating rate
(rps)
HP/MP/LP
(bar g)
Td
(˚C)
EEVG
(pulse)
EEVSC
(pulse)
EEVLB
(pulse)
Rated refrigeration
value
32
-30
103
96/37/14
123.9
180
130
200
Rated freezing value
32
-45
103
83/28/8
124.3
180
80
331
Outside
temperature
(˚C)
Evaporation
temperature
(˚C)
Compressor
Rotating rate
(rps)
HP/MP/LP
(bar g)
Td
(˚C)
EEVG
(pulse)
EEVSC
(pulse)
EEVLB
(pulse)
Refrigeration
overload
43
-30
98
107/42/13
122.6
204
145
302
Freezing overload
43
-45
104
105/38/10
124.1
180
91
347
Outside
temperature
(˚C)
Evaporation
temperature
(˚C)
Compressor
Rotating rate
(rps)
HP/MP/LP
(bar g)
Td
(˚C)
EEVG
(pulse)
EEVSC
(pulse)
EEVLB
(pulse)
Refrigeration low
outside temperature
-5.6
-30
101
73/31/14
109.7
182
101
0
Freezing low outside
temperature
-5.6
-45
103
74/25/8
123.6
180
73
101
(5) Setting the high pressure
High pressure cut value (CUT OUT)
140 bar
+0 bar
-10 bar
(6) Setting of operation control pressure (Setting evaporation temperature)
Setting value of the operation control pressure needs to be adjusted according to purposes. Special care is required particularly on the relation to the
setting value of room temperature (inside compartment temperature) thermostat.
Room temperature (inside compartment temperature) is controlled by opening or closing the liquid solenoid valve with the room temperature (inside
compartment temperature) thermostat. The condensing unit controls its capacity by detecting changes in the suction gas pressure (Ps) by opening or
closing the liquid solenoid valve with the control PCB of condensing unit.
Evaporation temperature* can be set from the following two methods by changing the value of the code “r28” of Module controller.
*The evaporation temperature means the saturated temperature of suction pressure.
(a) When using the Module controller
When the CDU is turned on for the first time after shipping, the Module controller code “r28” is set to 1 as default value. Therefore, if the value of the code
r28 is not changed, the target evaporation pressure is the value set in the Module controller. In this state, target evaporation pressure is set by changing
the values of codes “r01” and “r02”.
The target evaporation pressure is set to the central value between the lower value of the target evaporation pressure set in r01 and the upper value of
the target evaporation pressure set in r02. The target evaporation pressure is sent to the CDU from the module controller.
e.g. When r01 is set to 30 and r02 is set to 32, the target evaporation pressure sent to the CDU is 31 bar.
Code r01 is a code for setting the target evaporation pressure lower value and is set between 0 and 126. The initial setting value of r01 is the value set in
the rotary SW of the CDU. The default evaporation temperature value set in the rotary SW of the CDU is 0 °C. This value is about 34 bar when converted
into the evaporation pressure. The code r01 is the lower set point of evaporation pressure, so the value of code r01 first shows “33”. The lower set point of
evaporation pressure can be set by changing the value of code r01. The value set in code r01 must be less than the value set in code r02.
Code r02 is a code for setting the target evaporation pressure upper value and is set between 0 and 126. Same as the code r01, the initial setting value of
r02 is the value set in the rotary SW of the CDU and the default evaporation temperature value set in the rotary SW of the CDU is 0 °C. The code r02 is the
upper set point of evaporation pressure, so the value of code r02 first shows “35”. The upper set point of evaporation pressure can be set by changing the
value of code r02. The value set in code r02 must be greater than the value set in code r01.
(b) When using the rotary SW of CDU
When using the rotary SW of the condensing unit to set the evaporation pressure, the CDU must be turned off and on again after changing the Module
controller code “r28” from the default “1” to “0”. When this operation is performed, the value set by the rotary SW of CDU becomes the target evaporation
pressure. In this case, the target evaporation pressure setting in (a) is ignored.
Evaporation temperature corresponding to the evaporation pressure can be set from +5 to -45 in the unit of °C with the rotary switches (SW1, 2) on the
control PWB of CDU. The suction pressure setting is depending on the evaporation temperature (set by rotary SW).
The setting can be changed during operation and the default value at the shipment is 0°C. (“SW1” = “0 or 7”, “SW2” = “0”.)
e.g. When setting the evaporation pressure to 26 bar (the evaporation temperature is -10 °C), open the CDU panel to access the control PWB and set “SW1”
= “1” and “SW2” = “0”. An image is shown below.
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 29
