Safety Definition - Lennox eNeRGy Series Installation, Operating And Maintenance

High efficiency packaged air treatment unit

Table of Contents

INTRODUCTION

SAFETY

The safety information contained in this manual is provided as a guide for the safe handling of this installation. LENNOX

does not vouch for the completeness of this information and can therefore not accept liability for any possible omissions.

Everyone involved in the product life cycle must perform a risk analysis. This applies to manufacturers, installers, maintainers and end-

users. If risks are not eliminated or remain at unacceptable levels of occurrence or severity, they must be communicated to the next

party (the customer in general) through the drafting of an installation, use, maintenance guide.

In the roof tops, heat is being transported by a pressurized refrigerant, with changes in pressure and temperature. For air cooled roof

tops, fans have been provided to discharge heat into the environment. The protection of operating and maintenance personnel was

central in the design of the roof top. Safety features have been included to prevent excessive pressure in the system. Sheet metal parts

have been fitted to prevent inadvertent contact with (hot) pipes. For air cooled roof tops, the fans are equipped with protective grids

and the electrical. The service panels can only be opened using tools by authorized personnel.

Notwithstanding that the units are equipped with extensive safety and protection features, the utmost care and attention is

needed when carrying out operations on the machine. Furthermore, ear protection should be worn when working on or in the

vicinity of the roof tops. All operations on the cooling circuit or electrical equipment should be carried out by authorized

personnel.

It is essential to follow non exhaustive recommendations hereunder:

•

Never work on a unit that is still energized. Wait 15 minutes before working on the machine after a power outage (discharge of

the capacitors).

•

Any manipulation (opening or closing) of a shut-off valve must be carried out by a qualified and authorized engineer. These

procedures must be carried out with the unit shut-down.

•

Never work an electrical component until the general power supply to the unit has been cut. During any maintenance operations

on the unit, lock the power supply circuit in the open position ahead of the machine. If the work is interrupted, check the lock

before resuming the work.

•

WARNING: Even if the unit has been switched off, the power circuit remains energized, unless the unit or circuit disconnect

switch is open. Refer to the wiring diagram for further details.

•

In case of maintenance operations on fans (grills replacement ...) ensure that the power is shut off to avoid automatic restart.

•

Before the opening of the refrigerant circuit, check the pressure with manometers or pressure sensors, and purge the circuit in

accordance with current environmental directives.

•

Never leave a unit stopped with valves closed on the liquid line, refrigerant could be trapped and the pressure would rise.

•

All installation parts must be maintained by the personnel in charge, in order to avoid material deterioration and injuries to people.

Faults and leaks must be repaired immediately. The authorized technician must have the responsibility to repair the fault

immediately. Each time repairs have been carried out to the unit, the operation of the safety devices must be re-checked.

•

Follow guidance and recommendations given in safety and machine standards such as EN378, ISO5149, etc. The use of the EN

378-2 standard provides you with the state of the art with regard to the essential safety requirements of the Machine Directives

and PED.

•

Do not use oxygen to purge lines or to pressurize a machine for any purpose. Oxygen gas reacts violently with oil, grease, and

other common substances.

•

Never exceed the specified maximum operating pressures.

•

Verify the allowable maximum high- and low-side test pressures by checking the instructions in this manual and the pressures

given on the unit name plate.

•

Do not use air for leak testing. Use only nidron or dry nitrogen.

•

Do not unweld or flame cut the refrigerant lines or any refrigerant circuit component until all refrigerant (liquid and vapor) has

been removed from roof top. Successive purges with a neutral gas (such as dry nitrogen) are recommended to remove all traces

of refrigerant. Refrigerant in contact with an open flame produces toxic gases.

•

Do not siphon refrigerant

•

Wearing PPE is mandatory (glasses, cuffs, gloves, masks). Avoid splashing refrigerant on the skin or in the eyes. Wash any

spills from the skin with soap and water. If liquid refrigerant enters the eyes, immediately and abundantly flush the eyes with

water and consult a doctor