3. FLARING WORK AND PIPE CONNECTION

3-1. FLARING WORK

1)Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2)

2)Completely remove all burrs from the cut cross section of pipe. (Fig. 3)

•Put the end of the copper pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the piping.

3)Remove flare nuts attached to indoor and outdoor units, then put them on pipe having completed burr removal. (Not possible to put them on after flaring work.)

4)Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select A mm from the table according to the tool you use.

5)Check

•Compare the flared work with Fig. 6.

•If flare is noted to be defective, cut off the flared section and do flaring work again.

 

Good

No good

 

Copper

 

 

pipe

 

 

Tilted Uneven Burred

 

Fig. 1

Fig. 2

 

Flaring tool

Burr

Copper pipe

 

 

Spare reamer

 

 

Pipe cutter

 

 

Clutch type

Wing nut type

 

Fig. 3

Fig. 4

 

 

Inside is shin-

 

Smooth all

ing without any

 

around

scratches.

Die

Copper pipe

 

 

Even length

 

 

Flare nut

all around

 

 

Fig. 5

Fig. 6

Pipe diameter

Nut

 

A [mm (inch)]

 

Tightening torque

 

[mm (inch)]

(mm)

Clutch type tool

Clutch type tool

Wing nut type tool

N•m

kgf•cm

 

ft·Ib

for R410A

for R22

for R22

 

 

 

 

 

 

 

 

ø6.35

(1/4)

17

 

 

1.5 to 2.0

13.7 to 17.7

140 to 180

 

10 to 13

ø9.52

(3/8)

22

0 to 0.5

1.0 to 1.5

(0.06 to 0.08)

34.3 to 41.2

350 to 420

 

25 to 30

ø12.7

(1/2)

26

(0. to 0.02)

(0.04 to 0.06)

2.0 to 2.5

49.0 to 56.4

500 to 575

 

36 to 42

ø15.88

(5/8)

29

 

 

(0.08 to 1.0)

73.5 to 78.4

750 to 800

 

54 to 58

3-2. PIPE CONNECTION

•Fasten flare nut with a torque wrench as specified in the table.

•When fastened too tight, flare nut may brake after a long period and

cause refrigerant leakage.

Outdoor unit connection

Connect pipes to stop valve pipe joint of the outdoor unit in the same manner applied for indoor unit.

•For tightening, use a torque wrench or spanner and use the same tightening torque applied for indoor unit.

3-3. INSULATION AND TAPING

1)Cover piping joints with pipe cover.

2)For outdoor unit side, surely insulate every piping including valves.

3)Using piping tape (E), apply taping starting from the entry of outdoor unit.

•Stop the end of piping tape (E) with tape (with adhesive agent at- tached).

•When piping have to be arranged through above ceiling, closet or where the temperature and humidity are high, wind additional com- mercially sold insulation to prevent condensation.

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Troy-Bilt MXZ-4A36NA, MXZ-3A30NA Flaring Work and Pipe Connection, Insulation and Taping, Outdoor unit connection
Page 6 Page 8

MXZ-4A36NA, MXZ-3A30NA specifications

Troy-Bilt has long been a trusted name in outdoor power equipment, and their latest offerings, the MXZ-4A36NA and MXZ-3A30NA, exemplify the brand's commitment to quality and innovation in the field of lawn maintenance. Designed for homeowners and landscapers alike, these lawn mowers provide exceptional performance and versatility for tackling various mowing tasks.

The MXZ-4A36NA model boasts a powerful 24 HP engine, allowing it to effortlessly cut through thick grass and navigate uneven terrain. Its standout feature is the 36-inch cutting deck, which is not only robust but also designed to provide a clean and precise cut. An adjustable cutting height ensures that users can achieve their desired lawn finish, whether it's a smooth, manicured look or a slightly longer finish for a healthier lawn.

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In terms of user comfort, the MXZ series includes features such as an ergonomic seat and easy-to-reach controls, making extended mowing sessions more enjoyable. The mowers are designed with durability in mind as well, featuring heavy-duty construction and high-quality materials to withstand the rigors of regular use.

Another noteworthy characteristic is the maintenance-friendly design. Both models come with quick-access panels, making it easier for users to perform regular maintenance tasks like oil changes and blade replacements without hassle.

Overall, the Troy-Bilt MXZ-4A36NA and MXZ-3A30NA represent an impressive combination of power, efficiency, and user-friendly features. Whether for professional landscaping or residential use, these mowers are equipped to handle a wide range of mowing challenges effectively and with ease, making them worthy additions to any lawn care arsenal.
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