Daikin FTXN09KEVJU, Operation Manual

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Installation Manual EDUS041111_a
86 Room Air Conditioners K-Series
Outdoor Unit Installation
Refi
6.
Check the type of refrigerant to be used on the machine nameplate.
Precautions when adding R410A
Fill from the liquid pipe in liquid form.
It is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal operatio n.
Before fi 1)
siphon attached” displayed on it.)
Filling a cylinder with an attached siphon
Stand the cylinder upright when
filling.
There is a siphon pipe inside, so the
cylinder need not be upside-down to
fill with liquid.
Filling other cylinders
Turn the cylinder upside-down
when filling.
Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering. •
Refrigerant piping work
7.
7-1 Caution on pipe handling
Protect the open end of the pipe against dust and moisture. 1)
All pipe bends should be as gentle as possible. Use a pipe bender for 2)
bending.
Selection of copper and heat insulation materials 7-2
When using commercial copper pipes and fi
Insulation material: Polyethylene foam 1)
Heat transfer rate: 0.041 to 0.052W/mK (0.024 to 0.030Btu/fth˚F (0.035 to 0.045kcal/mh˚C))
Refrigerant gas pipe’s surface temperature reaches 230˚F ( 110˚C) max.
Choose heat insulation materials that will withstand this temperature.
2) Be sure to insulate both the gas and liquid piping and to provide insulation
dimensions as below.
Gas side Liquid side
Gas pipe thermal
insulation
Liquid pipe thermal
insulation
O.D. 1/2 inch
(12.7mm)
O.D. 1/4 inch
(6.4mm)
I.D. 0.551-0.630 inch
(14-16mm)
I.D. 0.315-0.393 inch
(8-10mm)
Minimum bend radius Thickness 0.393 inch (10mm) Min.
1-9/16 inch (40mm)
or more
1-3/16 inch (30mm)
or more
Thickness 0.031 inch (0.8mm) (C1220T-O)
Use separate thermal insulation pipes for gas and liquid refrigerant pipes. •
Wall
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt or water out.
Be sure to
place a cap.
Rain
Gas pipe
Liquid pipe
Gas pipe
insulation Liquid pipe
insulation
Finishing tape
Drain hose
Inter-unit wire
lling the refrigerant
lling, check whether the cylinder has a siphon attached or not. (It should have something like “liquid filling
ttings, observe the following: