Manual Dimplex LAK 14IMR (page 39 of 100) (English, German, French)

798322

Zoom out

Zoom in

1/100

www.glendimplex.de 452162.66.09a · FD 0108 EN-13

LAK 3IMR - LAK 14ITR English

7.4 Leak test and evacuation

Air and moisture in the cooling system have unwanted effects

as outlined below.

1) The pressure in the system increases.

2) The operating current increases.

3) The cooling (or heating) output falls.

4) Moisture in the cooling circuit can freeze and block the

capillary tubes.

5) Water can cause corrosion on parts in the cooling

system.

This means that the indoor and outdoor unit, as well as the con-

nection pipe, must be checked for leaks and pumped empty to

remove any non-condensable gases and moisture from the

system.

7.4.1 Preparation

Ensure that each pipe (liquid and air side) between the indoor

and outdoor unit is connected correctly and the wiring for the

test operation has been carried out. Remove the maintenance

valve caps from both the gas and liquid side of the outdoor unit.

Ensure that both maintenance valves on the liquid and air side

of the outdoor unit are closed at this point.

7.4.2 Leak test

Connect the multi-way valve (with pressure gauges) and

dry nitrogen gas cylinder with the filling hoses on this

maintenance connection.

NOTE

ºººº

A multi-way valve must be used for the leak test. If no multi-

way valve is available, an isolating valve can also be used. The

"Hi" lever on the 3-way valve must be closed at all times.

The system may be charged with max. 3.0 MPa dry nitro-

gen. The cylinder valve must be closed with a pressure of

3.0 MPa. The next step is to search for leaks with liquid

soap.

NOTE

ºººº

In order to prevent liquid nitrogen from entering the cooling

system, the top side of the gas cylinder must be higher than

the bottom side when pressure is building in the system.

1) The gas cylinder is usually used in an upright position.

Check all pipe connections (indoor and outdoor) and main-

tenance valves of the air and liquid side for leaks. Bubbles

indicate a leak. The soap must be wiped away with a clean

cloth.

2) If no leaks are identified in the system, reduce the nitrogen

pressure by removing the filling hose connection from the

gas cylinder. When the system pressure is normal again,

the hose must be removed from the gas cylinder.

7.4.3 Evacuation

1) Connect the end of the filling hose mentioned above to the

vacuum pump to pump the pipework and indoor unit

empty. The levers "Lo" and "Hi" on the multi-way valve

must be open. Start the vacuum pump. The duration of the

pumping empty process varies with different lengths of

the pipework and the pump output. The following table

shows the time required for pumping empty.

2) Close the levers "Lo" and "Hi" on the multi-way valve at the

desired vacuum pressure and switch off the vacuum

pump.

Finally

1) Open the valve handle on the liquid side completely in an

anti-clockwise direction with a maintenance valve key.

2) Open the handle of the valve on the gas side completely in

an anti-clockwise direction.

3) Loosen the filling hose connected to the air side slightly

from the maintenance connection to reduce the pressure,

then remove the hose.

4) Tighten the screw nuts and caps on the air side mainte-

nance connection again with an adjustment key. This pro-

cess is very important to prevent leaks on the system.

5) Position the valve caps on the air and liquid side mainte-

nance valves again and tighten. The purging with the vac-

uum pump is complete. The split-heat pump is now ready

for test operation.

A siphon prevents water from entering the electrics

Adhesive tape

Drain hose

(not used)

Refrigerant pipes

Connection cable

Mains cable

KlebebandKlebebandAdhesive tape

opening around opening around

the pipings with the pipings with

gum type sealer.gum type sealer.

Seal small gaps

around the pipe,

e.g. with silicon.

Siphon

TrapSiphon

Seal a small opening Seal a small opening

around the pipings

with gum type sealer.

Seal small gaps around

the pipe, e.g. with silicon.

Time required for pumping empty with a

0.11m_/hour vacuum pump

Length of the pipework

less than 10 m

Length of the pipework

more than 10 m

30 min. or longer 60 min. or longer

0.6 mbar or less

Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

Forumrules

To achieve meaningful questions, we apply the following rules:

First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.

new questions and answers
new manuals

You will receive an email to register for one or both of the options.

Get your user manual by e-mail

Enter your email address to receive the manual of Dimplex LAK 14IMR in the language / languages: English, German, French as an attachment in your email.

The manual is 7.79 mb in size.

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.

Info

Dimplex LAK 14IMR Manual

Product: