Danfoss WVS 32, WVS 40, WVS 50, WVS 100 Installation guide [ar]
Installation guide
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17
18
19
19
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Pressure operated water valve
WVS 32 – WVS 100
WVS 32 WVS 40 WVS 50 - WVS 100
016R9556
Fig. 1 Fig. 2 Fig. 3
Fig. 4 Fig. 5
016R9556
ENGLISH
Pressure operated water valve,
types WVS 32 – WVS 100
Technical data
Media
R22, R1270, R134a, R290, R404A,
R407A, R407C, R4 07F, R410A*,
Refrigerant side
Water side Fresh water and brine
Max. test pressure
Refrigerant side Pe= 29 bar = 2900 k Pa
R410a/R744 (CO2) Pe= 60 bar = 6000 kPa
Water side Pe= 16 bar = 1600 kPa
Opening differential pressure
WVS 32 – WV S 40
WVS 50 – W VS 100
For complete list of approved refrigerants,
visit www.products.danfoss.com and search
for individual code numbers, where
refrigerants are listed as part of technical
data.
R448A , R449A, R450A, R452A,
R507A, R513A, R600, R60 0a, R717
* High pressure refrigerants version
(45, 2 MWP) only
Min. 0.5 b ar = 50 kPa
Max. 4 bar = 400 kPa
Min. 0.3 b ar = 30 kPa
Max. 4 bar = 400 kPa
Fig. 1–3
1. Flare connection
2. Weld nipple
3. Bellows element
4. Push rod
5. Regulating nut
6. Top part
6a. Cover
7. Pilot insert
8. Spindle
9. Teflon sleeves
10. Insulating disc
10a. Gasket
12. Valve cover
15. Servo piston *)
16. Bottom screw
17. Drain plug
18. Gasket
19. Strainer assembly, complete *)
20. Self-cleaning strainer
21. Pilot nozzle
24. Servo spring **)
*) Please state valve size
**) See table Fig. 6
Assembly
Screws connecting pilot unit with
valve body to be tighten with 8.5 Nm.
Fitting
WVS is to be fitted in the cooling water
inlet with flow in the direction of the
arrow and with the bellows element
facing upwards. It is recommended
that a strainer should be inserted
before the valve.
The bellows element is to be
connected to the pressure side of
the refrigeration system at a point
where pressure pulsations from the
compressor do not affect the valve,
e.g. on the top of the condenser or
after the oil separator. The pressure
line must be connected so that
impurities cannot enter it. See Fig. 5.
Do not remove white insluting disk
(10). It needs to be always fitted
between pilot element and valve
housing.
Setting
Remove the cover (6a).
WVS can be set to begin opening
at a condensing pressure of
min. 2.2 bar = 220 kPa and
max. 19 bar = 1900 kPa.
© Danfoss | DCS (az) | 2018.02 DKRCC.PI.DA0.A8.52 | 1
The valve is completely open when
the condensing pressure has increased
by 1 bar = 100 kPa above the preset
opening pressure. A lower condensing
pressure is obtained by turning the
regulating nut (5) anticlockwise (to
slacken the regulating spring) – and
vice versa. When the refrigerating
system stops, the condensing pressure
falls, and so the WVS closes.
Service
The pressure operated water valve
must shut off the cooling water when
the refrigeration system is stopped. If
not, it may be due to the fact that large
impurities have settled on the valve
seat of the servo piston or pilot cone.
The strainer (20) or the pilot nozzle (21)
may be clogged up.
Impurities can be removed as shown
in Fig. 4. Insert a screwdriver between
the pilot cone spindle (8) and the push
rod (4). Tilting the screwdriver forces
the pilot cone down, and the valve
opens to full cooling water flow.
If still the valve does not close tightly,
shut off the cooling water supply to
the water valve. Unscrew the strainer
assembly (19) and clean both the
strainer and the pilot nozzle.
If the strainer or pilot nozzle is not
clogged up, dismount the top part
(6) and the valve cover (12), which can
be done without relieving the system
of its pressure. Remove the strainer
assembly from the valve cover, clean
it, and apply a coat of water-resistant,
acid-free grease to it. Fill the same
kind of grease into the space over the
Teflon sleeves (9). It may be necessary
to grind the pilot cone in its seat. Clean
the servo piston and valve seat and
apply a coat of water- resistant, acidfree grease to the servo cylinder and
the servo piston guide.
The pilot channels in the valve cover
can be cleaned after the screws have
been unscrewed from the sides of the
valve cover.
Check whether the O-rings need
replacement.
After fitting or overhaul the water
valve must be flushed vigorously for
some minutes in order to remove any
impurities from pipelines, etc. See Fig. 4.
If there is any risk of the valve bursting
due to frost during standstill periods,
it should be drained of water. It can be
done unscrewing the drain plug (17)
and the bottom screw (16).
DANSK
Trykstyret vandventil,
types WVS 32 – WVS 100
Tekniske dat a
Medier
R22, R1270, R134a, R290, R404A,
R407A, R407C, R4 07F, R410A*, R448A,
Kølemiddelside
Vandside Ferskvand og brine
Maks. prøvetryk
Kølemiddelside Pe= 29 bar = 2900 k Pa
R410 a/R 744 (CO2) Pe= 60 bar = 6000 kPa
Vandside Pe= 16 bar = 1600 kPa
Åbningsdifferenstryk
WVS 32 – WV S 40
WVS 50 – W VS 100
For komplet liste over godkendte
kølemidler, besøge
www.products.danfoss.com og søg
efter individuelle bestillingsnumre, hvor
kølemidler er opført som en del af tekniske
data.
R449A, R450A , R452A, R507A, R513A,
R600, R600a, R717
* Højtryksversio n (45,2 MWP)
min. 0.5 b ar = 50 kPa
maks. 4 b ar = 400 kPa
min. 0.3 b ar = 30 kPa
maks. 4 b ar = 400 kPa
Fig. 1–3
1. Flaretilslutning
2. Svejsenippel
3. Bælgelement
4. Trykstang
5. Reguleringsmøtrik
6. Topstykke
6a. Dæksel
7. Pilotindsats
8. Spindel
9. Teflonmanchetter
10. Isolationsskive
10a. Pakning
12. Ventildæksel
15. Servostempel *)
16. Bundskrue
17. Bundprop
18. Pakning
19. Komplet filterindsats *)
20. Selvrensende filter
21. Pilotdyse
24. Servoeder **)
*) Angiv ventilstørrelsen
**) Se tabellen fig. 6
Samling
Skruer, der forbinder pilotenhed med
Ventilhus der skal spændes med 8,5
Nm.
Montering
WVS monteres i kølevandstilgangen
med gennemstrømning i pilens
retning og med bælg-elementet
opad. Det anbefales at montere et
smudsfilter foran ventilen.
Bælgelementet tilsluttes
køleanlæggets
trykside et sted, hvor trykpulsationer
fra kompressoren ikke vil få nogen
indvirkning på ventilen, f. eks. på
toppen af kondensatoren eller efter
olieudskilleren. Trykrøret skal tilsluttes
sådan, at eventuelle urenheder ikke
kan løbe ind i røret. Se fig. 5.
Fjern ikke den hvide isolationsskive
(10). Isolationsskiven skal altid være
monteret mellem pilotelement og
ventilhus.
Indstilling
Fjern dækslet (6a).
WVS kan indstilles til at begynde
at åbne ved et kondenseringstryk
på min. 2.2 bar = 220 kPa og maks.
19 bar = 1900 kPa.
Ventilen er helt åben, når
kondenseringstrykket er steget
1 bar = 100 kPa over det indstillede
åbningstryk.
Lavere kondenseringstryk opnås ved
at dreje reguleringsmøtrikken (5) mod
venstre (reguleringsederen slækkes)
– og omvendt. Når køleanlægget
stopper, falder kondenseringstrykket,
og WVS vil derfor lukke.
Service
Trykstyret vandventil skal lukke tæt
for kølevandet når køleanlægget
er stoppet. Hvis den ikke gør det,
kan årsagen muligvis være, at større
snavs-partikler har sat sig fast på
servostemplets eller pilotkeglens
ventilsæde. Måske er filteret (20) eller
pilotdysen (21) tilstoppet.
Snavspartikler kan man forsøge
at erne som vist på fig. 4. Stik en
skruetrækker ind mellem pilotkeglens
spindel (8) og trykstangen (4). Når
skruetrækkeren vippes, presses
pilotkeglen nedad, og ventilen åbner
for fuld kølevands-gennemstrømning
gennem ventilen.
Hvis vandventilen stadig ikke
lukker tæt luk da for kølevandet til
vandventilen. Skru filter-indsatsen (19)
af og rens både filteret og pilotdysen.
Er filteret eller pilotdysen ikke
tilstoppet, afmontér så topstykket (6)
© Danfoss | DCS (az) | 2018.02 DKRCC.PI.DA0.A8.52 | 2
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