York TIWM006B21S - Refrigerant Piping Work; Piping Materials

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P5417052
6. Refrigerant Piping Work
Table 6.1 Piping Size
inch (mm)
Model Gas Piping Liquid Piping
TIWM006B21S
TIWM008B21S
TIWM012B21S
TIWM015B21S
1/2 (12.7) 1/4 (6.35)
TIWM018B21S
TIWM024B21S
TIWM030B21S
5/8 (15.88) 3/8 (9.52)
(3) Prepare eld-supplied copper pipes.
(4) Select clean copper pipes. Make sure there is no dust and moisture inside.
(5) Make sure that moisture, old refrigerant, and other contaminants do not enter the refrigeration system.
Impurities can adhere to the expansion valve and can impair system operation.
(6) When cutting piping, do not use conventional tools such as saws or grinding wheel cutting disks that
produce harmful metallic lings and burrs that can damage a refrigerant system. Use a copper tube
cutter to eliminate metal lings produced by the cutting operation. After the cut is made, blow out each
pipe with dry compressed air or nitrogen to remove this residue before making pipe connections.
6.1 Piping Materials
(1) Tolerances of refrigerant piping lengths depend on the combination with the outdoor unit.
Refer to the "Installation and Maintenance Manual" for the outdoor unit.
(2) Select the piping size from the following table.
For details of refrigerant piping work, vacuum pump and refrigerant charging, refer to the "Installation and
Maintenance Manual" for the outdoor unit.
Usethespeciednon-ammablerefrigerant(HFCR410A)fortheoutdoorunitrefrigerantcycle.Do
notchargetheunitwithanythingotherthanHFCR410A,suchashydrocarbonrefrigerants(propane
andIsobutene),oxygen,andotherammablegases(acetylene,ammonia,andsoforth),orany
poisonousgaseswheninstalling,maintainingandmovingtheunit.Thesesubstancesarevolatile
anddangerousandcanresultinre,explosion,andseriousorfatalinjuries.
In Case of Getting the Pipe
Through a Hole in the Wall
Correct
CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap or put a plastic bag
over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Rubber Band
Do not lay the pipe
directly on the ground.
Rain water
can come in.
In Case of Rain