Danfuss FIA 15-200 Manuel d'installation - Page 2

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ENGLISH

Refrigerants

Applicable to HCFC, HFC, R717 (Ammonia),

R744 (CO

) and all flammable refrigerants.

The strainer is only recommended for use

in closed circuits. For further information

please contact your local Danfoss sales

office.

Pressure and temperature range

–60/+150°C (–76/+302°F)

FIA 15-200:

The strainers are designed for a max.

working pressure of 52 bar (754 psi g)

Installation

Note:

At delivery the strainer housing is

not equipped with strainer insert

or accessories

The strainer must be installed with the top

cover downwards, and the flow must be

directed towards the top cover as indicated

by the arrow on the strainer housing (fig.

1). The strainer insert must be inserted

after welding.

The strainer housing is designed to

withstand a high internal pressure.

However, the piping system should be

designed to avoid liquid traps and reduce

the risk of hydraulic pressure caused by

thermal expansion. It must be ensured

that the strainer is protected from pressure

transients like "liquid hammer" in the

system.

Recommended flow direction

The strainer must be installed with the flow

towards the top cover as indicated by the

arrow on the side of the valve body (fig.

1). Flow in the opposite direction is not

acceptable.

Welding

The top cover should be removed before

welding (fig. 2) to prevent damage to the

gasket between the strainer housing and

top cover. Only materials and welding

methods compatible with the valve

housing material, must be applied to the

valve housing.

Clean the strainer housing internally to

remove welding debris at completion

of welding and before the strainer is

reassembled.

Removing the top cover can be omitted

provided that:

The temperature in the area between the

strainer housing and top cover during

welding does not exceed +150°C/+302°F.

This temperature depends on the welding

method as well as on any cooling of the

strainer housing during the welding itself.

(Cooling can be ensured by, for example,

wrapping a wet cloth around the filter

body). Make sure that no dirt, welding

debris etc. get into the strainer during the

welding procedure.

The strainer housing must be free from

stresses (external loads) after installation.

Strainers must not be mounted in systems

where the outlet side of the strainer is

open to atmosphere. The outlet side of the

strainer must always be connected to the

system or properly capped off, for example

with a welded-on end plate.

Assembly

Remove welding debris and any dirt

from pipes and strainer housing before

assembly. Check that the strainer insert

has the right size before it is inserted in

the top cover and check that the gasket is

undamaged.

Place the strainer insert (pos. D) from

underneath. The insert has a slight force fit

into the housing, no gaskets or O-rings are

used.

If magnet inserts have been chosen as

accessory, fit those on the top cover before

replacing the cover.

Tightening

Tighten the top cover with a torque

wrench, to the values indicated in the table

(fig. 3).

Please note that the table (fig. 3)

containing maximum torque must be

adhered to and never exceeded.

If the drain valve has been chosen as

accessory, the drain plug should be

replaced by the drain valve.

Colours and identification

The FIA strainers are painted with a

red oxide primer in the factory. Precise

identification of the strainer is made via

the ID plate on the top cover, as well as by

the stamping on the strainer housing. The

external surface of the strainer housing

must be prevented against corrosion

with a suitable protective coating after

installation and assembly.

Be sure to protect the ID plate when

repainting the strainer.

DKRCI.PI.FN1.A5.ML / 520H6262

Maintenance

Mounting of accessory:

Filter bag (fig. 4)

A 50µ filter bag (pos. E), especially for

commissioning of the plant, can replace

the normal strainer insert.

Mount the filter bag (held in place by the

filter holder) and be sure to place the filter

bag correctly in the strainer as shown in

fig. 4.

The flow must go into the filter bag cavity

and out or else the bag will not function

properly.

Dismantling the strainer (fig. 3)

Before servicing the strainer, isolate it from

the system and remove all refrigerant by

evacuation to zero pressure. Check for

refrigerant pressure before unscrewing and

removal of the top cover.

The strainer insert must be removed

without any use of tools

Cleaning

Clean the strainer insert using an

appropriate solvent by flushing and

brushing. The use of strong acids cannot

be recommended. The strainer insert must

be wiped or blown dry before inspection.

If the insert is damaged or the sediments

cannot be removed, the strainer insert

must be replaced.

Assembly

Remove any dirt from the housing before

the strainer is assembled.

Replacement of gasket

Change the gasket for the top cover (pos.

C) and drain plug.

Check that the strainer insert is correctly

placed before remounting the top cover

and bolts (pos. A).

Tightening (fig. 3)

Tighten the top cover bolts (pos. A) with

a torque wrench according to the table in

fig. 3

Use only original Danfoss parts (including

gaskets) for replacement. Materials of

new parts are certified for the relevant

refrigerant.

In cases of doubt, please contact your local

Danfoss sales office.