Operation - Danfoss Optyma iCO2 Instructions Manual

Packaged condensing unit

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User manual (84 pages)

Table of Contents

Instructions

10.6. Operation start

1. Turn on the operation switch (CNS2) at the bottom of controller.

2. Turn ON the power supply of condensing unit.

3. Turn ON the operation switch of the module controller.

4. When Low pressure value ≥ Reset pressure or Outdoor air temperature < 5°C and Medium pressure value ≤ Reset pressure, the compressor starts.

10.7. Check of adequate refrigerant quantity

Calculate the refrigerant quantity according to page 17 "6.4. Refrigerant charge".

Charge the 90% of the calculated amount.

When you confirm that the following operating conditions 1, 2 are met, please add the refrigerant to the 100% of the calculated amount.

1. In the operation at 5 minutes or more after starting the compressor, the subcooling degree (*1) must be 0°C or under.

*1 Subcooling degree = Medium pressure saturation temperature "C46" – "Liquid feed pipe temperature "C15"

Calculated by 7 segment display

2. The aperture of EEVSC subcooling coil electronic expansion valve must be at the upper limit value.

Type

Upper limit value (pulse) of subcooling coil electronic expansion valve 7 segment display "C23"

OP-UPAC015COP04E

Operation range

Use this condensing unit within the following operation ranges.

Item

Refrigerant

Evaporation temperature

Low pressure (LP)

Suction gas temperature(Ts)

Discharge temperature(Td)

Ambient temperature

Power supply voltage

Voltage unbalance rate

* Regarding the capacity of low pressure side device (show case, etc.) to be connected to the condensing unit, connect the device such that its total nominal

capacity will become 50% or more of the rated capacity of the condensing unit.

11 – Operation

11.1. Oil check verification

Charge condensing unit oil according to "page 13, 6.1. Charge of condensing unit oil".

Check if adequate quantity of oil is retained, by the following refrigerating oil check operations.

Operation

1. Change the setting of compressor speed at 90 rps using 7-segment display "P19". (For the detail of setting, see Explanation of control on Page 25)

2. Operate all load units to be connected (show case and unit cooler).

3. Change the dipswitch SW4-6 OFF → ON.

4. Operate the unit for 180 minutes in total with the compressor running at 90 rps. Elapsed operating time of compressor (90rps) is indicated at 7-segment

display. (The compressor may stop during operation depending on the condition of load unit.)

5. Should the operation of total 180 minutes be counted up without detecting by the oil level sensor any oil shortage (detection of oil shortage for 30

seconds continuously), "7-segment display" changes to "0". In this case, it is complete the oil quantity check.

When "7-segment display" has shown "Lo1" in place of "0", the operation is stopped because an oil shortage has been detected. In this case, turn the

dipswitch SW-6 to OFF and replenish the oil.

(Quantity of oil to be added at one time should be 500 cc as a guide.) After replenishing the oil, repeat from (1), 2 to check operation till "7-segment

display" shows "0".

11.2. Oil return operation

When the external input harness is inserted into the external input "CN3 " of the control board while the compressor is in operation and the rotational

speed is less than 70 rps, the oil return control is immediately executed.

38 | AN405821998738en-000102 - 118A5495A

C46: Medium pressure saturation temperature

(Continuous rating)

Unit

Specifications

R744

°C

-45 ~ +5

bar abs

8.3 ~ 30.5

Evaporating