Danfoss FIA 15-200 Strainer Housing Installation Guide
- June 9, 2024
- Danfoss
Table of Contents
ENGINEERING TOMORROW
Installation guide
Strainer
**FIA 15-200 65 bar (942 psi)
148R9557
**
FIA 15-200 Strainer Housing
Installation
Note: At delivery the strainer housing is not equipped with strainer insert or accessories.
Maintenance
Max. torque
| Nm| LB-ft
---|---|---
DN 15-20| 21| 15
DN 25-32-40-50| 44| 32
DN 65| 74| 54
DN 80| 44| 32
DN 100| 75| 53
DN 125-150| 183| 135
DN 200-300| 370| 272
Filter bag Flow direction
Refrigerants
Applicable to HCFC, HFC, R717 (Ammonia), R744 (CO2) 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 filters are designed for a max. working pressure of 65 bar (942 psi)
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.
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.
Danfoss A/S
Climate Solutions • danfoss.com • +45 7488 2222
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© Danfoss | Climate Solutions
2022.06 AN05278641756802-000701
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