DIRECT COIL REFRIGERANT COILS Manuel d'installation et d'utilisation - Page 4

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Installation

Receiving

1. The coils should be carefully inspected for shipping

damage upon receipt

2. The freight BOL should also be checked against items

received for complete delivery

3. Any shortage or damage should be noted on the

delivery receipt; doing this lets the courier know that

you intend to file a claim

If any shortage or damage is discovered after unpacking

the unit, call the courier for a concealed damage or

shortage inspection. For additional assistance, contact

your Direct Coil representative.

Installation

1. Remove the coil from the shipping container and

avoid damaging the fins. Any bends can be

straightened using the appropriate equipment

2. It is recommended to clean the coil using an industrial

coil cleaner before installation

3. The DX coil(s) should be mounted level, with tubes in

a horizontal orientation. Airflow can be horizontal or

vertical

4. The distributor should be inspected to verify that the

nozzle is in place

5. Proper functioning of the thermostatic expansion

valve function is critical for DX coil performance. It is

recommended

manufacturer's instructions when installing the valve

6. The suction line should be connected to the suction

connection, and liquid to the expansion valve.

Connecting in any other configuration will impact

performance

7. Ensure that clearance is given between the coil and

any surrounding structures

8. The coil should be completely leak free prior to

commissioning. Pressure test the coil, expansion

valve assembly and suction connection to 100 psi

with dry nitrogen

9. The coil should be left pressurized for a minimum of

30 minutes with no loss of pressure. Thoroughly leak

test the coil and system including all brazed joints

10. It is important follow proper methods for evacuating

and charging systems with refrigerant. Use the

compressor manufacturer's recommendations for

charging the system with refrigerant and starting the

For more information on Direct Coil products call (613) 544 2200 | 5055 Taylor Kidd Blvd, Millhaven, Ontario K0H 1G0

carefully

the

compressor. After the system is started, adjust TXV

superheat following TXV manufacturer's directions

All pipe brazing must be done using high quality materials

and must be tested for leaks. Pipe sizes for the system

must be selected based on the head (pressure) available

from the circulation pump. Ensure that the drainpipe is

sized adequately.

Recommendations

1. Refrigerant piping must be done in accordance with

all applicable national and local codes, and with

accepted industry standards

Lifting Instructions

When lifting a coil, one should ensure that proper

precautions are taken, including:

Wearing safety equipment, such as hard-toe shoes

Safety gloves

One should also lift while maintaining proper posture, as

refrigerant coils are heavy and improper procedure could

cause harm.

NEVER LIFT A COIL BY THE HEADER, CIRCUITS,

OR CONNECTIONS.

1. Any coil that is 45 pounds or heavier will have two

removeable lifting brackets. Use only these when

lifting the coil

TXV

2. When lifting a coil, lifting should be done by the legs

and the coil kept close to the center of gravity

3. If the coil is too heavy, find help and perform an

assisted lift

Piping

This section is a guide for the correct installation of the

refrigerant fluid piping system; however, Direct Coil is not

responsible for the installation of the piping.

1. After both lines are connected, the entire system must

be leak tested (see 'First Use'). Care should be given

to those parts which will be inaccessible in future

dates.

2. The header, pipes, and brazed joints should not be

used to support any loads or weight

3. Ensure that all field piping is self-supporting and can

accommodate thermal expansion and contraction (of

the coil)