Inspecting And Handling The Unit; Placing The Unit; Refrigerant Piping; Selection Of Piping Material And Refrigerant Branching Kit - Daikin REYQ72PAYD Installation Manual

• If the height is exceeded the above, calculate h1 and h2 shown in
the figure below, and add h2/2 to the service space of front side
and h1/2 to the service space of suction side.
<Front side>
h2
19 - 5/8 +
2
or more
DANGER
• Do not install unit in an area where flammable materials are
present due to risk of explosion resulting in serious injury or
death.
• Refrigerant gas in heavier air and replaces oxygen. A massive
leak could lead to oxygen depletion, especially in basements,
and an asphyxiation hazard could occur leading to serious inju-
ry or death.
Refer to the chapter "CAUTION FOR REFRIGERANT LEAKS".
NOTE
1.
An inverter air conditioner may cause electronic noise generated
from AM broadcasting. Examine where to install the main air condi-
tioner and electric wires, keeping proper distances away from stereo
equipment, personal computers, etc.
Particularly for locations with weak reception, ensure there is a dis-
tance of at least 10 ft for indoor remote controllers, place power wir-
ing and transmission wiring in conduits, and ground the conduits.
(Refer to figure 3)
1. Indoor unit
2. Branch switch, earth leakage circuit breaker
3. Remote controller
4. COOL/HEAT selector
5. Personal computer or radio
2.
When installing in locations where there is heavy snowfall, imple-
ment the following snow measures.
• Ensure the base is high enough that intakes are not clogged by
snow.
• Remove the rear intake grille to prevent snow from accumulating
on the fins.
4.

INSPECTING AND HANDLING THE UNIT

• At delivery, the package should be checked and any damage should
be reported immediately to the carrier claims agent.
• When handling the unit, take into account the following :
1.
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor damage.
2.
Decide on the transportation route.
3.
If a forklift is to be used, pass the forklift arms through the large open-
ings on the bottom of the unit. (Refer to figure 4)
4.
If hanging the unit, use a cloth sling to prevent damaging the unit.
Keeping the following points in mind, hang the unit following the pro-
cedure shown in figure 5.
• Use a sling sufficiently strong to hold the mass of the unit.
• Use 2 belts of at least 27 ft long.
• Place extra cloth or boards in the locations where the casing
comes in contact with the sling to prevent damage.
• Hoist the unit making sure it is being lifted at its center of gravity.
5.
After installation, remove the transportation clasp (yellow) attached
to the large openings. (Refer to figure 4)
(Refer to figure 4)
1. Packaging material
2. Forklift
(Refer to figure 5)
1. Belt sling
2. Wear plate
4
<Suction side>
Service h1
+
space
2
or more
5.

PLACING THE UNIT

• Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise. (Refer to figure 6)
• The base should support the unit with the extent larger than hatched
area in figure 7.
If protective rubber is to be attached, attach it to the whole face of the
base.
• The height of the base should be at least 5-7/8 in. from the floor.
• Secure the unit to its base using foundation bolts. (Use four commer-
cially available M12-type foundation bolts, nuts, and washers.)
• The foundation bolts should be inserted 13/16 in..
(Refer to figure 6)
1. Independent base (four corner type)
2. Independent base (with center support type)
3. Beam base (Horizontal)
4. Beam base (Vertical)
5. Center of the product
(Refer to figure 7)
1. Foundation bolt point (φ9/16 in. dia, : 4positions)
2. (Depth of product)
3. (Inner dimension of the base)
4. (Outer dimension of the base)
NOTE
• There are restrictions on the refrigerant pipe connecting order
between outside unit in the case of the multi system.
See "2-1 Combination" for detail.
• When installing on a roof, make sure the roof floor is strong enough
and be sure to water-proof all work.
• Make sure the area around the machine drains properly by setting up
drainage grooves around the foundation.
Drain water is sometimes discharged from the outside unit when it is
running.
• For anti-corrosion type, use nuts with resin washers. If the paint on
nut connections comes off, the anti-corrosion effect may decrease.
Resin washers
6.

REFRIGERANT PIPING

NOTE
• All field piping must be installed by a licensed refrigeration technician
and must comply with relevant local and national regulations.
• After piping work is complete, do not under any circumstances open
the shutoff valve until "7. FIELD WIRING" and "10. CHECKING OF
DEVICE AND INSTALLATION CONDITIONS" are complete.
• Do not use flux when brazing the refrigerant piping. Use the phosphor
copper brazing filler metal (B-Cu93P-710/795 : ISO 3677) which does
not require flux.
(Flux has extremely negative effect on refrigerant piping systems. For
instance, if the chlorine based flux is used, it will cause pipe corrosion or,
in particular, if the flux contains fluorine, it will damage the refrigerant oil.)
6-1 Selection of piping material and Refrigerant
branching kit
• Use only pipes which are clean inside and outside and which do not
accumulate harmful sulfur, oxidants, dirt, cutting oils, moisture, or
other contamination. (Foreign materials inside pipes including oils
for fabrication must be 9 mg/10 ft or less.)
• Use the following items for the refrigerant piping.
Material : Jointless phosphor-deoxidized copper pipe
Size : See "6-5 Example of connection" to determine the cor-
rect size.
Thickness : Select a thickness for the refrigerant piping which
complies with national and local laws.
• For piping work, follow the maximum tolerated length, difference in
height, and length after a branch indicated in the "6-5 Example of
connection".
English