Daikin RXYQ120PYDN, Installation Manual

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14 English
• Reinforce the insulation on the refrigerant piping according to the
installation environment. Condensation might form on the surface of
the insulation. Refer to the below.
„
Ambient temperature : 86°F, humidity : 75% to 80% RH : min.
thickness : 9/16 in..
„
If the ambient temperature exceeds 86°F and the humidity 80%
RH, then the min. thickness is 3/4 in..
See the Engineering data book for detail.
• If there is a possibility that condensation on the shutoff valve might
drip down into the indoor unit through gaps in the insulation and pip-
ing because the outside unit is located higher than the indoor unit,
etc., this must be prevented by caulking the connections, etc.
(Refer
to figure 26)
• The piping lead-out hole lid should be attached after opening a
knock hole.
(Refer to figure 27)
• If small animals and the like might enter the unit through the piping
lead-out hole, close the hole with blocking material (procured on site)
after completion of “
11. ADDITIONAL REFRIGERANT CHARGE
AND CHECK OPERATION ”. (Refer to figure 30)
(Refer to figure 26)
1. Insulation material
2. Caulking, etc.
(Refer to figure 27)
1. Piping lead-out hole lid
2. Open a knock hole at “ ”.
3. Block “ ”.
NOTE
• After knocking out the holes, we recommend you remove burrs in the
knock holes (
See figure 27 ) and paint the edges and areas around
the edges using the repair paint.
10. CHECKING OF DEVICE AND INSTALLA-
TION CONDITIONS
Be sure to check the followings.
For those doing electrical work
1.
Make sure there is no faulty transmission wiring or loosing of a nut.
See “
7-4 Transmission Wiring Connection Procedure ”.
2.
Make sure there is no faulty power wiring or loosing of a nut.
See “
7-5 Power Wiring Connection Procedure ”.
3.
Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above regular
value in accordance with relevant local and national regulations.
For those doing pipe work
1.
Make sure piping size is correct.
See “
6-1 Selection of piping material and Refrigerant branching kit ”.
2.
Make sure insulation work is done.
See “
9. PIPE INSULATION” .
3.
Make sure there is no faulty refrigerant piping.
See “
6. REFRIGERANT PIPING ”.
11. ADDITIONAL REFRIGERANT CHARGE
AND CHECK OPERATION
The outside unit is charged with refrigerant when shipped from the factory,
but depending on the size and length of the piping when installed, it may
require additional charging.
For charging the additional refrigerant, follow the procedure in this chapter.
And then carry out the check operation.
11-1 Before working
[About the refrigerant tank]
Check whether the tank has a siphon pipe before charging and place
the tank so that the refrigerant is charged in liquid form.
(See the figure below.)
NOTE
• Always use the proper refrigerant (R410A). If charged with the refrig-
erant containing an improper material, it may cause an explosion or
accident.
• R410A is a mixed refrigerant, so charging it as a gas will cause the
refrigerant composition to change, which may prevent normal oper-
ation.
[Shutoff valve operation procedure]
When operating the shutoff valve, follow the procedure instructed below.
NOTE
• Do not open the shutoff valve until “10. CHECKING OF DEVICE
AND INSTALLATION CONDITIONS” are completed. If the shutoff
valve is left open without turning on the power, it may cause refriger-
ant to buildup in the compressor, leading insulation degradation.
• Be sure to use the correct tools.
The shutoff valve is not a back-seat type. If forced it to open, it might
break the valve body.
• When using a service port, use the charge hose.
• After tightening the cap, make sure no refrigerant gas is leaking.
Tightening torque
The sizes of the shutoff valves on each model and the tightening torque
for each size are listed in the table below.
<Size of Shutoff Valve>
(Refer to figure 28)
1. Service port
2. Cap
3. Hex holes
4. Shaft (valve body)
5. Seal section
To open
1.
Remove the cap and turn the shaft counterclockwise with the hexa-
gon wrench.
2.
Turn it until the shaft stops.
3.
Make sure to tighten the cap securely.
(For the tightening torque, refer to the item <Tightening Torque>.)
To close
1.
Remove the cap and turn the shaft clockwise with the hexagon wrench.
With siphon pipe
Other tanks
72P type 96P type 120P type
Liquid pipe
shutoff valve
φ
3/8
The 120P type corresponds to the
φ
1/2 - diameter
onsite piping using the accessory pipe.
Gas shutoff
valve
φ
1
The 72P type corresponds to the
φ
3/4 - diameter
onsite piping using the accessory pipe.
The 96P type corresponds to the
φ
7/8 - diameter
onsite piping using the accessory pipe.
The 120P type corresponds to the
φ
1-1/8 - diameter
onsite piping using the accessory pipe.
High side
equalizer pipe
shutoff valve
φ
3/4
Low side
equalizer pipe
shutoff valve
φ
3/4
Stand the tank upright and charge.
(The siphon pipe goes all the way inside,
so the tank does not need be put
upside-down charge in liquid form.)
Stand the tank upside-down and charge.
01_EN_3P215731-2.fm Page 14 Tuesday, December 4, 2007 12:04 PM