Troy-Bilt MXZ-3A30NA, MXZ-4A36NA Purging PROCEDURES, Leak TEST, and Test RUN, GAS Charge

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4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST

1)

Remove service port cap of stop valve on the side of the outdoor unit

 

gas pipe. (The stop valve will not work in its initial state fresh out of the

 

factory, totally closed with cap on.)

2)

Connect gauge manifold valve and vacuum pump to service port of

 

stop valve on the gas pipe side of the outdoor unit.

3)

Run the vacuum pump. (Vacuumize for more than 15 minutes.)

4)

Check the vacuum with gauge manifold valve, then close gauge mani-

 

fold valve, and stop the vacuum pump.

5)

Leave as it is for one or two minutes. Make sure pointer gauge mani-

 

fold valve remains in the same position. Confirm that pressure gauge

 

shows –0.101 Mpa [Gauge] [–760 mm Hg (–30 in. Hg)].

6)

Remove gauge manifold valve quickly from service port of stop valve.

7)

After refrigerant pipes are connected and evacuated, fully open all

 

stop valves on both sides of gas pipe and liquid pipe. Operating with-

 

out fully opening lowers the performance and this causes trouble.

8)

Refer to 1-4., and charge the prescribed amount of refrigerant if

 

needed. Be sure to charge slowly with liquid refrigerant. Otherwise,

 

 

–0.101MPa

Compound pressure

 

 

[–760 mm Hg

*4 to 5 turns

Stop valve cap

(–30 in. Hg)]

gauge (for R410A)

*Close

(Torque 19.6 to 29.4 N•m,

Pressure gauge

200 to 300 kgf•cm, 15 to

(for R410A)

*Open

22 ft•lb)

 

Gauge manifold

 

 

 

 

 

Stop valve

valve (for R410A)

 

 

 

Hexagonal wrench

 

for GAS Handle

Handle High

 

Low

Charge hose

 

 

 

 

 

(for R410A)

Service port cap

 

 

 

(Torque 13.7 to

 

 

 

17.7 N•m, 140 to

 

 

 

180 kgf•cm, 10 to

 

13 ft•lb)

Vacuum pump

Stop valve

(for R410A)

for LIQUID

 

composition of the refrigerant in the system may be changed and af-

fect performance of the air conditioner.

9) Tighten cap of service port to obtain the initial status.

10) Leak test

Precautions when using the control valve

ControlA

 

valveOpen

Service port

Close

 

Body

Charge hose

(for R410A)

When attaching the control valve to the service port, valve core may de- form or loosen if excess pressure is applied. This may cause gas leak.

When attaching the control valve to the service port, make sure that the valve core is in closed position, and then tighten part A. Do not tighten part A or turn the body when valve core is in open position.

4-2. GAS CHARGE

Perform gas charge to unit.

1 Connect gas cylinder to the service port of stop valve.

2Perform air purge of the pipe (or hose) coming from refrigerant gas cylinder.

3Replenish specified amount of the refrigerant, while operating the air conditioner for cooling.

Note:

In case of adding refrigerant, comply with the quantity specified for the refrigerating cycle.

CAUTION:

When charging the refrigerant system with additional refrigerant, be sure to use liquid refrigerant. Adding gas refrigerant may change the composi- tion of the refrigerant in the system and affect normal operation of the air conditioner. Also, charge the system slowly, otherwise the compressor will be locked.

To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm water [under 40°C (140°F)] during cold season. But never use naked fire or steam.

 

 

 

 

Union

 

 

 

 

Stop valve

 

 

 

 

Liquid pipe

 

 

 

 

Union

Indoor

D

C

B

A

unit

 

 

 

 

 

 

 

 

Union

 

 

 

 

Stop valve with

 

 

 

 

service port

 

 

 

 

Gas pipe

 

 

 

 

Union

Refrigerant gas

 

 

 

cylinder

 

 

 

 

operating valve

 

 

Gauge manifold

(for R410A)

 

 

 

 

 

 

valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

Outdoor unit

(MXZ-4A36NA)

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Contents Installation Manual Before Installation Following should Always be Observed for SafetyRequired Tools for Installation SpecificationsFree Space Required around Outdoor Unit Selecting the Installation LocationSelecting Pipe Size and Optional DIFFERENT-DIAMETER Joints Parts to be Provided AT Your Site Installation DiagramOutdoor unit installation Connecting Wires for Outdoor Unit Outdoor Unit InstallationInstalling the Unit Disconnect switch may be required. Check the local code Connect wires to the matching numbers of terminalsConnecting Wires and Connecting Ground Wire Power Supply Cable and Ground WireFlaring Work and Pipe Connection Flaring WorkPipe Connection Insulation and TapingGAS Charge Purging PROCEDURES, Leak TEST, and Test RUNPurging Procedures and Leak Test Test RUN Explanation to the UserPage Manual DE Instalación El usuario no debe instalar la unidad Antes DE LA InstalaciónEspecificaciones Nota Selección DEL Lugar DE InstalaciónEspacio Libre Necesario EN Torno a LA Unidad Exterior Instalación de la unidad exterior Diagrama DE InstalaciónComponentes QUE Deberá Adquirir LO- Calmente Instalación DE LA Unidad Exterior Instalación DE LA UnidadCables DE Conexión Para LA Unidad Exterior 4A36NAConexión DE Cables Y Conexión DEL Cable DE Tierra Siga la normativa eléctrica localCable DE Alimentación Y Cable DE Tierra AtenciónTrabajos DE Abocardado Y Conexión DE Tuberías Tareas DE AbocardamientoConexión DE Tuberías Aislamiento Térmico Y Forrado CON CintaCarga DE GAS CuidadoComprobación DE Funcionamiento Explicación Para EL UsuarioAcerca del mecanismo de protección de la reanudación Función de corrección de conexiones/tuberíasJG79A073H01

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.

Similarly, the MXZ-3A30NA model provides efficiency with its 21 HP engine and 30-inch cutting deck. This smaller size makes it ideal for those with smaller lawns or more intricate landscaping. The compact design doesn’t skimp on power or performance; it ensures maneuverability in tight spaces, making it suitable for various properties.

Both models feature advanced technology that enhances the mowing experience. Troy-Bilt's "TractorTuff" technology allows for an easy start-up and smooth operation, while the 'Smart Switch' ignition system adds convenience with simple push-button starts. These features not only make operating the mowers easier but also increase overall reliability.

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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