Danfoss Optyma iCO2 User Manual page 46

User Guide | Optyma™ iCO2
Accessories
Name
Wiring
Wiring
Dryer
Reducer (for dryer)
Reducer (for service port)
The harnesses are used to control the operation of CO2 refrigerating machine from external control panel (device).
(The "a" contact relay needs to be provided at site.)
CAUTION
• Have the harnesses installed by your dealer or specialized contractor.
• Electrical work must be made using dedicated circuit by qualified electricians.
• Source power supply to the CO2 refrigerating machine and external control panel must be turned off before starting work.
• Carefully read the installation manual of CO2 refrigerating machine, and observe the precautions.
External input harness (attached to the outside of control box) ... 3 pcs.
Brown ... For compulsory
oil return control input
(CNS3)
* Harnesses for external operation input (CNS1) and demand input (CNS2) are fixed in the control box with tapes.
Installation procedure
1. Cut the harness, and attach a round terminal (provided at site) at the end, and connect to the relay.
*External input is input in the non-voltage contact (open or short-circuited). The relay is not necessary if the non-voltage contact output of control panel
can be used.
2. Connect the connector to the control PCB of CO2 refrigerating machine.
Specifications of external input
Default functions of external inputs are as shown at right.
*Inputs use non-voltage contacts.
Functions can be changed from the default settings using the 7-segment display as follows.
* Setting values on the 7-segment display correspond to respective functions as shown at right
[Procedure to change external input function]
1. Using SW8, SW9, change the 7-segment display to the display (POO) of
external input to be changed.
2. Hold down SW7 for 3 seconds to flicker the display, and change the
setting value for function to be changed with SW8, SW9.
3. Hold down SW7 for 3 seconds to light the display.
This is all for the change of external input functions.
*1 Demand input: P04
*2 Demand rate setting for multistage demand input: 0%, 40%, 60%, 80%
46 | BC408445719305en-000101
Q'ty Location of use
Connect these to CNG1, 2 or CNS3 on the outdoor unit
3
PCB when external inputs are used.
When using external outputs, cut the harness at the
center to produce a pair of connectors, and connect
2
them to CNH, CNY, CNZ1 and CNZ2 on the outdoor unit
PCB.
Install in liquid pipe. Dryer pipe diameter need to
1
reduce with reducer to connect liquid pipe.
2 Connect to dryer pipe.
Using for airtight test and vacuuming. Connect to
3
service port.
External Input Harness Installation Manual
Blue ... For gas cooler
fan snow control input
(CNG1)
These are fixed in the control box with tapes.
When using the wiring, refer to the "External input
harness Instruction manual", page 46.
These are fixed in the control box with tapes.
When using the wiring, refer to the "External input
harness Instruction manual", page 47.
This is fixed to unit base plate with tapes.
These are fixed to unit base plate with tapes.
"These are fixed to unit base plate with tapes.
When using the reducer, refer to the page 12-13 of
Instruction manual "Leak detection" and "Vacuum
dehydration"."
External input Default setting: Function
CNS3 (Brown) 4: Compulsory oil return control input
CNG1 (Blue) 5: Gas cooler fan snow control input
CNG2 (White) 9: Multistage demand input
Setting value Function
0 External operation input
1 Demand input
2 Quiet mode input
4 Compulsory oil return input
5 Gas cooler fan snow control input
9 Multistage demand input
PF22: OFF → 000 → 040 → 060 → 080, P14, P15
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
White ... For multistage
demand input (CNG2)
JST XAP-02V-1
7-segment: Setting value
P08 : 0 ~ 20
P09 : 0 ~ 20
P10 : 0 ~ 20
Open Short-circuit
Stop
Valid
Invalid
Ordinary
Ordinary
Invalid
Valid
Valid
Valid
Valid
Valid
Valid