Refrigerant Piping; The Piping Material; Piping Connection - York YAKN09BZNWEUH1 Installation And Maintenance Manual

4.Refrigerant Pipe
DANGER
Use the refrigerant according to outdoor nameplate.
When carrying on the leakage check and test, do not
mix in the oxygen, the acetylene and flammable and
the reactive gas, these gases are quite dangerous,
and may possibly cause explosion. It is suggested
that the compressed air, the nitrogen or the
refrigerant is used to perform these experiments.
4.1 The Pipe Material
(1) Prepare the copper pipe on the spot.
(2) Choose dustless, non-humid, clean copper pipe.
Before installing the pipe, use nitrogen or dry air to
blow away the tube dust and impurity.
(3)Choose the copper pipe according to Fig. 4.2.

4.2 Piping connection

(1) The connection positions of the pipe are shown in
Fig. 4.1 and Fig. 4.2.
Fig. 4.1 The connection positions of the tube
Model
Capacity
(Btu/h)
9K/12K
18K
24K
36K/42K/
Fig. 4.2 The pipe diameter
48K/55K
Fig. 4.2 The pipe diameter
The refrigerant gas pipe
The refrigerant liquid pipe
Drain pipe connection hole
Gas Pipe Liquid Pipe
Φ9.52 Φ6.35
φ12.7 φ6.35
φ15.88 φ9.52
φ19.05 φ9.52
(2) As shown in Fig. 4.3, screw up the nuts with 2 spanners.
Tube size
φ6.35mm
φ9.52mm
φ12.7mm
φ15.88mm
φ19.05mm
(3) After finishing connecting the refrigerant pipes, keep
it warm with the insulation material.
Side of the
indoor unit
Fig. 4.4 Piping insulation procedure
unit:mm
CAUTION
·
The pipe goes through the hole with the seal.
·
Do not put the pipes on the floor directly.
Do not put the pipes on the
floor directly.
Protected with the tape or plug.
9
Installation and Maintenance
Torque（N . m）
Fig. 4.3 Screw up the nut torque
Insulation (attached)
Clamp(attached)
20
40
60
80
100
Refrigerant pipe
(field supplied)
Insulation
( field supplied )