background image

English

6

NOTE

Prepare a water drainage channel around the foundation to con-
densate waste water from around the unit.

If the unit is to be installed on a roof, check the strength of the roof 
and its drainage facilities first.

Make sure the area around the machine drains properly by setting up 
drainage grooves around the foundation.
(Condensate water is sometimes discharged from the outside unit 
when it is running.)

Use a nut with a resin clip plate to protect the nut tightening part from 
rusting.

6.

WATER PIPING WORK

• The water pressure resistance of water piping of this outside unit is 

285 psi.

• The connection port for water piping is located in the front. The con-

nection ports for drain piping are located in the front and back. When 
using the back port, change the cast iron plug from the back to the 
front and securely close it.

• Because of indoor use, carry out piping work in such a way no water 

may drop on the outer plate.

• Drain piping should be short and have a slant downwards. 

The diameter of drain pipe should be the same as the diameter of 
unit connection (1/2) or more.

• The diameter of water pipe should be the same as the diameter of 

unit connection (1-1/4) or more.

• Install an air purge valve in the midway of the water piping to prevent 

cavitation.

• After completing the drain piping work, make sure that the water runs 

smoothly without any clogging by dust.

• Do not connect the drain outlet to the water outlet.
• Install the strainer (accessory) in the inlet of water piping within a dis-

tance of 4.9 ft from the outside unit. 
(If sand, waste or rust particles are mixed in the water circulation 
system, metal materials will become corrosive.)

• Install insulation on the inlet/outlet of water piping to prevent conden-

sation and freezing.
At installing insulation on water in/outlet pipe, use Polyurethane form 
thickness 3/16 in. for insulation of water piping socket on heat 
exchanger.

• Install insulation up to the base of heat exchanger as shown in the 

figure 6.

• Install a gate valve for chemical cleaning in an easy position to han-

dle.

• Use water pipes complied with the local and national codes.
• Run the water pump to flush inside of water piping.

Then, clean the strainer.

• If there is a possibility of freezing, take measures to prevent freezing.
• Tighten securely the connection of water piping and socket with 

tightening torque of 220 lbf·ft or less.
(If a large torque is applied, the unit may be damaged.)

(Refer to figure 6)

1.

Air parge

2.

Outlet of water

3.

Inlet of water

4.

Gate valve

5.

Water piping socket

6.

Water piping

7.

Insulation

8.

Heat exchanger

9.

Strainer (accessory)

10.

Drain valve

11.

Connection port to draining piping

12.

Insulation cover

13.

3-1/8 in. or less

14.

Insulation of water piping socket

7.

HANDLING OF THE BRAZED PLATE 
TYPE HEAT EXCHANGER

CAUTION

A brazed plate type heat exchanger is used for this unit. Because 
its structure is different from a conventional type heat exchanger, it 
must be handled in a different manner.

7-1 When designing the equipment

1.

Install the strainer (accessory) at the water inlet side adjacent to the 
outside unit in order to prevent any foreign materials such as dust, 
sand, etc. from entering.

2.

Depending on the water quality, scale may stick to the plate type heat 
exchanger. In order to remove this scale, it is necessary to clean it at 
a regular interval using chemicals. To this end, install a gate valve in 
the water piping. Set up a piping connection port on the piping 
between this gate valve and the outside unit for cleaning by chemi-
cals.

3.

For the purpose of cleaning and water drain off from the outside unit 
(water draining during a long period of non-use in winter, draining 
upon starting of season-off), install an “air discharge plug” and a 
“water draining plug” at the inlet/outlet ports of water piping. In addi-
tion, install an “automatic air discharging valve” at the top of riser pip-
ing or at the top of a portion where air tends to stay.

4.

Independent of the piping inlet of the outside unit, install a cleanable 
strainer at a portion close to the pump piping inlet.

5.

Carry out complete cooling/thermal insulation of water piping and 
outdoor dehumidification. If complete cooling or thermal insulation 
has not been carried out, any damage may be caused during severe 
winter due to freezing, in addition to thermal loss.

6.

When you stop operation during night or winter, it is necessary to take 
measures to prevent water related circuits from natural freezing in the 
area the ambient temperature drops below 32°F (by water drain off, 
keeping the circulation pump running, warming up by a heater, etc.) 
Freezing of water related circuits may result in any damage to the 
plate type heat exchanger. Therefore, please take appropriate mea-
sures depending on the circumstances of use.

(Refer to figure 7)

1.

Example of piping

2.

Water inlet piping

3.

Strainer (accessory)

4.

Air discharge plug (for joint use with cleaning port)

5.

Cleaning device

6.

Strainer for pump

7.

Automatic air discharge valve

8.

Water outlet piping

9.

Joint use with water draining plug

10.

Plate type heat exchanger

11.

Outside unit

7-2 Before starting a test run

1.

Before starting a test run, please make sure that the piping work has 
been carried out in a proper manner. Especially, make sure that the 
strainer, air discharge valve, automatic water supply valve, expansion 
tank and cistern are positioned at their places correctly.

2.

After water has been completely filled in, first run the pump only, and 
then make sure that no air has been caught in the water circulation 
system and the water flow rate is correct. If any air has been caught 
or the flow rate is not enough, the plate type heat exchanger may 
freeze. Measure any water pressure loss before and after the out-
side unit and make sure that the flow rate is as designed. In case of 
any abnormal, stop the test run immediately and carry out trouble 
shooting to resolve the trouble.

3.

Following the installation manual, carry out a test run of the outside 
unit.

4.

After the test run has been completed, inspect the strainer at the inlet 
piping of the outside unit. Clean it if it is dirty.

Resin clip plate

Summary of Contents for RWEYQ144PTJU

Page 1: ...for future reference This manual should be left with the equipment owner Lire soigneusement ces instructions avant I installation Concerver ce manuel port e de main pour r f rence ult rieure Ce manuel...

Page 2: ...6 13 16 3 15 16 9 13 16 21 5 8 30 11 16 9 9 8 10 8 9 7 7 6 6 6 9 7 8 5 8 15 3 8 4 3 1 2 11 13 16 39 3 8 35 7 16 19 11 16 1 2 3 4 4 10 5 6 5 4 9 6 7 7 10 8 1 2 3 4 9 Heat recovery system Heat pump syst...

Page 3: ...figure 13 figure 12 figure 11 A B C A B C F1 F1 F2 F2 Q1 Q2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 4 5 6 1 2 7 C H SELECTOR TO IN D UNIT TO OUT D UNIT TO MULTI UNIT 3 A B C F1 F1 F2 F2...

Page 4: ...very system 1 2 3 4 5 6 7 8 9 10 11 5 4 12 14 15 16 17 13 figure 16 A B C A B C 1 DS1 1 2 3 4 OFF ON O U T I N TO IN D UNIT F1 F2 A1P A1P DS1 1 2 3 4 OFF ON O U T I N F1 F2 P1 P2 P1 P2 1 1 2 6 3 3 4 5...

Page 5: ...4 5 6 Heat pump system Heat recovery system 4 5 3 2 1 figure 24 1 11 1 2 2 4 3 4 3 5 5 R410A R410A 9 7 7 8 13 9 6 6 16 10 10 10 10 17 12 12 14 15 15 18 18 Heat pump system Heat recovery system 1 2 3...

Page 6: ...sult in equipment or property damage accidents only DANGER Refrigerant gas is heavier than air and replaces oxygen A massive leak can lead to oxygen depletion especially in base ments and an asphyxiat...

Page 7: ...on tribute to the greenhouse effect if it is released Therefore take proper measures to check for the tightness of the refrig erant piping installation Read the chapter Refrigerant Pip ing and follow...

Page 8: ...itches off automatically in order to protect the unit from freezing Hold ambient temperature at 35 95 F Heat release from the unit 0 64 kW hour Model 72 84 It is therefore recommended to always ventil...

Page 9: ...emale Thread 1 2FPS 2 female Thread General RWEYQ216PTJU RWEYQ252PTJU Nominal cooling capacity 2 MBh 216 252 Nominal cooling capacity 3 MBh 243 283 5 Nominal input cooling heating 4 kW 12 60 12 00 16...

Page 10: ...ower without fail Open type tower cannot be used 4 Strainer Install the strainer accessory without fail at the inlet of water pip ing If sands wastes rust particles etc are mixed in the water cir cula...

Page 11: ...manner 7 1 When designing the equipment 1 Install the strainer accessory at the water inlet side adjacent to the outside unit in order to prevent any foreign materials such as dust sand etc from ente...

Page 12: ...within the standard 2 Clean the strainer 3 Make sure that the flow rate is correct 4 Make sure that the operational conditions pressure flow rate outlet temperature etc are normal 2 Because the plate...

Page 13: ...fect but also may cause the capacitor to overheat due to high frequency waves Therefore never install a phase advancing capacitor Keep power imbalance within 2 of the supply rating 1 Large imbalance w...

Page 14: ...electromagnetic switch for the water pump to each outside unit Select without fail an auxiliary a contact able to switch min imum load of DC15V 1mA When connecting for each outside unit Connect to the...

Page 15: ...erminals for connections to the power terminal block When none is available follow the instructions below Do not connect wiring of different thicknesses to the power termi nal block Slack in the power...

Page 16: ...s always required When installing the piping follow the instructions in the installation manual that comes with the kit Restriction for the installation of the outside unit multi connection piping kit...

Page 17: ...cal piping with the provided insulation to prevent it from coming into contact with the casing Precautions for installation of units NOTE The outside unit multi connection piping kit that is sold sepa...

Page 18: ...c d e f r s t g h j k l m n o p i 23 3 lbs Total length ft of liquid piping size at 7 8 0 235 lbs ft Total length ft of liquid piping size at 3 8 Total length ft of liquid piping size at 1 4 Total len...

Page 19: ...etc this must be prevented by caulking the connections etc WARNING Be sure to insulate connection piping as touching them can cause burns 9 8 Checking of device and installation conditions Be sure to...

Page 20: ...refrigerant 9 10 Stop valve operation procedure CAUTION Do not open the stop valve until 1 6 of 9 8 Checking of device and installation conditions are completed If the stop valve is left open without...

Page 21: ...onfiguration on the main unit Any settings made on a sub unit will be ignored After this close the electrical compo nents box lid Always perform configuration after turning ON the power To learn the s...

Page 22: ...rding to local regulations or standards The following standards may be applicable if local regulations are not available The VRV System like other air conditioning systems uses R410A as refrigerant R4...

Page 23: ...e open ings above and below the door which are each equivalent in size to 0 15 or more of the floor area 3 Calculating the refrigerant density using the results of the calcula tions in steps 1 and 2 a...

Page 24: ...1645 Wallace Drive Suite 110 Carrollton TX 75006 info daikinac com www daikinac com 3P153897 12P EM09A022 0910 FS...

Reviews: