Danfoss Optyma Cooler Installation guide

Optyma™ Cooler

Air and Electric Defrost Units


Index
1.	General Safety Information	1
2.	Inspection	1

3.	Unloading	2
4.	Mounting	2
5.	Refrigeration piping	3
6.	Expansion Valve	3

7.	Drain Line	3
8.	Wiring	3
9.	Installation	3
10.	Vacuum	3

11.	Start-up	3
12.	Maintenance and service	4
13.	Troubleshooting	6

14.	Spare Parts	7
15.	Reference Data	8

1 - General safety information

All installation and maintenance procedures should be performed by qualified personnel already familiarized with the equipment.

All field wiring should match the requirements of the equipment, as well as any local or national codes.

Coil edges and other sharp objects should be met with caution, as they can cause serious injury. Fan blades are especially sharp, and therefore should be handled only while wearing protective gloves.

High temperatures can cause damage to the equipment. The expansion valve must be covered in heat absorbent material and the suction line sensing bulb removed while brazing the refrigerant connections.

Never use the refrigeration compressor to evacuate the equipment. Never start the refrigeration compressor if it is in a vacuum.

Fan motors are sealed and do not need lubrication

All power sources should be disconnected before any type of service work is performed on the equipment. For cleaning the equipment, remove and reinstall the drain pan after every cleaning session. Failure to follow these steps can result in damaged equipment or personal injury.

Inhalation of certain refrigerants can be harmful, or even fatal. Failure to implement proper detection devices, ventilation, and procedures can result in serious injury or death. Ventilation of all refrigerants should follow all related regulations, as certain refrigerants are harmful to the environment. For more information, refer to any local or national codes that may apply.

2 - Inspection

Each shipment should be carefully checked against the bill of loading at time of receipt. The shipping receipt should not be signed until all items listed on the bill of loading have been accounted for. Check carefully for any damage. Any and all shortages or damages should be reported to the delivery carrier. Damaged equipment during shipment becomes the delivery agent’s responsibility and should not be returned unless prior approval has been given by Danfoss. The equipment is pressurized with 29 psi (2 Bar) of dry air during manufacturing. If the unit lost pressure during transportation, contact the warranties department: USwarranty@danfoss.com

For special requirements please contact our factory.

Pssss!

AN378367211987en-US0101 | 1

Instructions

3 - Unloading

Special care should be taken while unpacking or uncrating the equipment so that damage and injury can be prevented. Heavy equipment should be kept on the original pallet until ready for final installation. While using lifting straps, ensure to use a spreader bar and make sure the straps do not compress the metal construction. When using a forklift, make sure the unit is positioned as shown in the following image.

Pallet

4 - Mounting

The equipment can be mounted using od hangers, lag screws and/or bolts made of stainless steel to prevent galvanic corrosion. Units should be hung with no degree of inclination so that the condensate drainage works properly. Proper airflow through the unit is essential for efficient performance and maintenance of design storage temperatures. Never install an evaporator over a doorway.

Mounting reference DACC

1.1xH

Lr/n+1

Note: 1.1xH or greater is critical for proper performance

n = number of units to install

Lr = length of room

Unit Dimensions

Low Profile

Med. Profile

High Profile

Fans

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

(in.)

(mm)

7/8”

937

17 3/8”

442

18”

457

55”

1397

17 3/8”

442

18”

457

87 3/8”

2220

23 3/8”

593

25 1/16”

646

85 11/16”

2177

27 1/2”

698

33 1/2”

851

1/8”

1857

17 3/8”

442

18”

457

118 7/8”

3020

23 3/8”

593

25 1/16”

646

117 3/16”

2977

27 1/2”

698

33 1/2”

851

1/4”

2317

17 3/8”

442

18”

457

150 3/8”

3820

23 3/8”

593

25 1/16”

646

148 11/16”

3777

27 1/2”

698

33 1/2”

851

109

5/16”

2777

17 3/8”

442

18”

457

Notes

•Do not place the cooler directly over or next to a door.

•Do not place product directly in front of the cooler.

•The air cooler should have a free air discharge for air throw.

•Do not place coolers in front of each other at a distance less than their air throw indicated in the technical specification sheet.

•In the case of electric defrost units; make sure to leave a free space of at least the length of the unit on the electric connection side to remove the heaters in case of failure.

•The minimum distance between air defrost units must be 39.4 in.

•If you have reduced space or special room construction, please contact your local sales office to receive the correct advice on unit mounting.

•This unit cooler should have free air discharge and be located below flat ceilings to achieve rated air throw.

2 | AN378367211987en-US0101

Instructions

5 - Refrigerant piping

Type, sizing and installation of all piping must be in accordance with the recommended and accepted practices for refrigeration applications. All low temperature piping should also be insulated in accordance with standards ASHRAE. Suction traps should be used when and if the suction line rises above the unit cooler. On horizontal lines, the good practice installations recommend a minimum slope according to ASHRAE. It is recommended to have a slope of at least 1/4 inches (0.63 cm) by 10 feet (304.8 cm) in length in order to return the oil to compressors.

6 - Expansion valve

For direct expansion units, select an expansion valve in accordance with capacity data and as required by expansion valve manufacturer. Expansion valves with external equalizers should be used. After the temperature has reached design conditions, adjust the expansion valve to obtain 8 to 10º F superheat at the suction line. Expansion valves are to be installed in accordance with the specific manufacturer’s recommendations. Units that require an external equalized expansion valve must have that line connected. Proper location of the bulb is extremely important to the performance of the coil. Good thermal contact to the suction line is also essential. On solder type valves, a wet cloth wrapped around the valve during installation will protect it from overheating and damage. On multiple evaporator systems, the piping should be arranged such that the flow from any valve cannot affect the bulb of another.

7 - Drain line

All drain lines subject to freezing temperatures must have drain line heaters and be insulated. Drain line traps must also be heated to prevent freezing up of the drain line and trap. It is recommended that drain traps be installed outside of the conditioned space. The drain line must have a slope level and look for the nearest exit to the outside.

8 - Wiring

All wiring must be done in strict accordance with local and national electrical codes. Fan motor(s), local isolators, electrical heater elements and controllers must be wired in accordance with the electrical wiring diagrams provided. Use copper conductors of appropriate size only. All electrical installations should only be performed by qualified and authorized personnel.

For thermal motor protection, the installed thermal contacts must be used and wired according to the circuit diagram attached to the unit.

The unit must be connected to physical ground.

9 - Installation

The installation and maintenance of this equipment should be performed only by qualified professional personnel who are familiar with this type of equipment. The equipment arrives from factory pressurized with dry air. All equipment must be evacuated before charging the system with refrigerant. All field wiring should be checked and be in strict conformity with the equipment requirements, as well as all national and local codes. Use the name plate electrical data for conductor and fuse sizing. Avoid contact with any sharp edges or sharp coil surfaces. These can be a potential injury hazard. Make sure that all power sources are disconnected before any service work is done on equipment.

Before starting up unit make sure all accessible electrical parts are secured!

10 - Vacuum

Proper vacuum is essential prior to charging the refrigerant for the system. This avoids many problems that can arise due to lack of detail within this step. The system should be checked through all cycles to ensure proper operation. ASHRAE best practices for should be followed when handling vacuum and charging refrigerant.

11 - Start-up

At start-up the following items should be checked:

•Check all threaded connections.

•Check electrical connections of motors, heater elements and any additional components, if applicable.

•Run the fans and check the direction of rotation. Make sure that there is no transport damage.

•During the test run observe the equipment and take notice of the following:

-Verify silent operation of the fans (bearings, contacts, balance)

-Check power requirements of electrical motors

-Verify absence of Leaks

-Adjust the expansion valve for proper superheating, if necessary

•After 24 hours of operation, re-check the equipment, especially all rotating parts.

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