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Installation manual

9

ERHQ011~W1 + ERLQ011~W1

Outdoor unit for air to water heat pump

4PW54249-1

Cautions for necessity of a trap

Since there is fear of the oil held inside the riser piping flowing back into
the compressor when stopped and causing liquid compression
phenomenon, or cases of deterioration of oil return, it will be necessary
to provide a trap at an appropriate place in the riser gas piping.

Trap installation spacing. (See figure 4)

A trap is not necessary when the outdoor unit is installed in a
higher position than the indoor unit.

L

EAK

 

TEST

 

AND

 

VACUUM

 

DRYING

When all piping work is complete and the outdoor unit is connected to
the indoor unit, it is necessary to (a) check for any leakages in the
refrigerant piping and (b) to perform vacuum drying to remove all
moisture in the refrigerant piping.

If there is a possibility of moisture being present in the refrigerant
piping (for example, rainwater may have entered the piping), first
carry out the vacuum drying procedure below until all moisture has
been removed.

General guidelines

All piping inside the unit has been factory tested for leaks.

Use a 2-stage vacuum pump with a non-return valve which can
evacuate to a gauge pressure of –100.7 kPa (5 Torr absolute, 
–755 mm Hg). 

Connect the vacuum pump to both the service port of the gas
stop valve and the liquid stop valve to increase efficiency.

Setup

(See figure 5)

Leak test

The leak test must satisfy specification EN 378-2.

1

Vacuum leak test

1.1 Evacuate the system from the liquid and gas piping to 

–100.7 kPa (5 Torr).

1.2 Once reached, turn off the vacuum pump and check that

the pressure does not rise for at least 1 minute.

1.3 Should the pressure rise, the system may either contain

moisture (see vacuum drying below) or have leaks.

2

Pressure leak test

2.1 Break the vacuum by pressurizing with nitrogen gas to a

minimum gauge pressure of 0.2 MPa (2 bar). 
Never set the gauge pressure higher than the maximum
operation pressure of the unit, i.e. 4.0 MPa (40 bar).

2.2 Test for leaks by applying a bubble test solution to all piping

connections.

2.3 Discharge all nitrogen gas.

Vacuum drying

To remove all moisture from the system, proceed as follows:

1.

Evacuate the system for at least 2 hours to a target vacuum of 
–100.7 kPa. 

2.

Check that, with the vacuum pump turned off, the target vacuum
is maintained for at least 1 hour. 

3.

Should you fail to reach the target vacuum within 2 hours or
maintain the vacuum for 1 hour, the system may contain too
much moisture. 

4.

In that case, break the vacuum by pressurizing with nitrogen gas
to a gauge pressure of 0.05 MPa (0.5 bar) and repeat steps 1 to
3 until all moisture has been removed. 

5.

The stop valves can now be opened, and/or additional
refrigerant can be charged (see "Charging refrigerant" on
page 10).

A

Outdoor unit

B

Indoor unit

C

Gas piping

D

Liquid piping

E

Oiltrap

H

Install trap at each difference in height of 10 m.

Do not purge the air with refrigerants. Use a vacuum
pump to evacuate the installation. No additional
refrigerant is provided for air purging.

Make sure that the gas stop valve and liquid stop
valve are firmly closed before performing the leak test
or vacuum drying.

1

Pressure gauge

2

Nitrogen

3

Refrigerant

4

Weighing machine

5

Vacuum pump

6

Stop valve

Make sure to use a recommended bubble test
solution from your wholesaler.
Do not use soap water, which may cause
cracking of flare nuts (soap water may contain
salt, which absorbs moisture that will freeze
when the piping gets cold), and/or lead to
corrosion of flared joints (soap water may contain
ammonia which causes a corrosive effect
between the brass flare nut and the copper flare).

After opening the stop valve, it is possible that the pressure
in the refrigerant piping does not rise. This might be
caused by e.g. the closed state of the expansion valve in
the outdoor unit circuit, but does not present any problem
for correct operation of the unit.

Содержание ERLQ011BAV3

Страница 1: ...STALLATION MANUAL ERHQ011BAV3 ERHQ014BAV3 ERHQ016BAV3 ERHQ011BAW1 ERHQ014BAW1 ERHQ016BAW1 ERLQ011BAV3 ERLQ014BAV3 ERLQ016BAV3 ERLQ011BAW1 ERLQ014BAW1 ERLQ016BAW1 Outdoor unit for air to water heat pum...

Страница 2: ...1 2 4 5 6 3 1 3 2 4 5 A B A E B C D H H L A A B2 B2 B2 C C D1 D1 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 A A B1 B1 B1 B1 B1 B1 B2 B2 B2 C C D1 D1 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 1 1 2...

Страница 3: ...prescrizioni per 07 v v v 08 de acordo com o previsto em 09 10 under iagttagelse af bestemmelserne i 11 enligt villkoren i 12 gitt i henhold til bestemmelsene i 13 noudattaen m r yksi 14 za dodr en u...

Страница 4: ...t does not exceed the concentration limit in the event of a leakage Otherwise this may lead to an accident due to oxygen depletion Be sure to use only the specified accessories and parts for installat...

Страница 5: ...ns on page 3 Improper drain piping may cause water leakage and make the furnitures get wet Install the indoor and outdoor units power wire and connecting wire at least 1 meter away from televisions or...

Страница 6: ...rinding works where a lot of dust is created the unit must be covered Do not place any objects or equipment on top of the unit top plate Do not climb sit or stand on top of the unit Be sure that suffi...

Страница 7: ...l not affect the unit If lateral snowfall is possible make sure that the heat exchanger coil is not affected by the snow if necessary construct a lateral canopy PRECAUTIONS ON INSTALLATION Check the s...

Страница 8: ...REFRIGERANT PIPE SIZE AND ALLOWABLE PIPE LENGTH A Location of the 2 fixation holes on the front side of the unit B Location of the 2 fixation holes on the rear side of the unit C Wires field supply S...

Страница 9: ...ded when passing copper tubes through walls Piping should be mounted so that the flare is not subjected to mechanical stress Flaring guidelines Flares should not be re used New ones should be made in...

Страница 10: ...t the operating pressure will be low for example when cooling will be performed while the outside air temperature is low sufficiently seal the flare nut in the stop valve on the gas line with silicon...

Страница 11: ...tion Be careful not to let the indoor and outdoor piping come into contact with the compressor terminal cover If the liquid side piping insulation might come into contact with it adjust the height as...

Страница 12: ...inimum gauge pressure of 0 2 MPa 2 bar Never set the gauge pressure higher than the maximum operation pressure of the unit i e 4 0 MPa 40 bar 2 2 Test for leaks by applying a bubble test solution to a...

Страница 13: ...syphon attached or not and position the cylinder accordingly NOTE National implementation of EU regulation on certain fluorinated greenhouse gases may require to provide the appropriate official nati...

Страница 14: ...ally 5 Once operation stops after 3 to 5 minutes close the liquid stop valve and the gas stop valve 6 The pump down operation is now finished The remote controller may display U4 and the indoor pump m...

Страница 15: ...re the wiring in the order shown below 1 Secure the earth wire to the stop valve attachment plate so that it does not slide 2 Secure the earth wire to the stop valve attachment plate one more time alo...

Страница 16: ...r unit for wiring of indoor unit etc Attach an earth leakage circuit breaker and fuse to the power supply line See figure 6 In wiring make certain that prescribed wires are used carry out complete con...

Страница 17: ...ase protection circuit forced the unit to stop check if all phases are existing If this is the case shut off the power supply to the unit and replace two of three phases Turn on power again and start...

Страница 18: ...ntling of the unit treatment of the refrigerant of oil and of other parts must be done in accordance with relevant local and national legislation UNIT SPECIFICATIONS Technical specifications Electrica...

Страница 19: ...y S1NPH Pressure sensor S1PH Pressure switch high TC Signal transmission circuit for V3 models only V1R Power module for V3 models only V1R V2R Power module for W1 models only V2R V3R Diode module for...

Страница 20: ...4PW54249 1 Copyright Daikin...

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