Emerson ZB Copeland Scroll Service Manual download pdf (Page 11)

ZB Series

Application guide

Oils

Mineral oil is not adaptable for systems working with the new refrigerants, because it is not compatible with this kind of refrigerant. It has already

been verified that POE lubricating oil can replace mineral oil. To ensure a long working life, the performance characteristics of polyester oil must be

specifically noted. Only certified ester oils may be used with the new refrigerants R404A, R134a, R407C and R507. They should be mixed according

to specified guidelines. To prevent the mineral oil and the polyester oil from polluting each other, the devices for traditional refrigerants and new

refrigerants, such as vacuum-pump, pipe fittings, charge and reclamation equipment and other parts should be clearly distinguished and serviced.

Poly Ester Oil has a very strong hygroscopic property. The chemical stability of the lubricating oil will be affected if it draws in moisture. During

storage and transportation, the compressor is charged with dry nitrogen to prevent the penetration of moisture. During installation, the exposure

of the compressor outlet should be minimized in every possible way.

Ester oils certified by Copeland: EAL Arctic 22CC, Mobil Co.;

Emkarate RL 32CF, ICI Co.

Mineral oils certified by Copeland: Suniso 3GS, Sun Oil Co.;

Capella WF32, Chevron/Texaco Co.

Please see also Copeland operating instruction manual AE17-1248 for details of Copeland-approved lubricating oils. System manufacturers should

provide data for refrigerants on the nameplate.

Typical layout of suction piping

As short as possible

(See note 6)

Suction pipe

Drying-filter for

suction pipe

<0.5m

Uninterrupted piping (without any elbow)

The purpose of the above-mentioned piping

layout is to decrease the stress in the piping.

Design of discharge and return oil piping

should also comply with this principle.

If the length of pipe exceeds 0.5m, measures

should be taken to fix it.

If there is a heavier load on the piping (such as a

filter-drier), due care should be given to fixing.

It is advised that the length of the pipe not drop

below 0.2m.

Piping sections should be small as far as

possible (50mm or shorter). At the same time,

adequate welding length should be ensured.

Copeland does not recommend using an elbow

to connect piping sections, and recommends

using copper tubes without joints or turns.

Notes:

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Emerson ZB Copeland Scroll Service Manual Page 11

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