miyawaki inc. - Genel Makina

OM-E-MX1N-110413-2
INSTALLATION, OPERATION AND
HANDLING MANUAL
Steam – Water – Mixing Valve
MODEL: MX1N
MIYAWAKI INC.
Osaka, Japan
2
CONTENTS
1. Before using the Mixing Valve
2. Installation
3. Operation of the Mixing Valve
4. Troubleshooting
5. Maintenance
6. Parts List
This Handling Manual should be used by experienced
personnel as a guide to the installation and maintenance
of the Steam-Water-Mixing Valve.
Selection and Installation of this Mixing Valve should
always be accompanied by competent technical assistance.
If further information is required we ask you to contact
MIYAWAKI or our local Representative.
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1. Before using the Mixing Valve
(1) Confirm the ratio between the steam and cold water pressure !
This ratio should be as follows:
Steam Pressure
3 >
-----------------------------------Cold Water Pressure
>
1
--3
If the ratio between steam an cold water pressures will be greater
than 3:1 or 1:3 you cannot get the required hot water temperature.
Therefore we recommend to install pressure gauges in the steam and
water lines.
(2) Confirm accessories:
Strainer
Check Valves
Dowels and screws
for the Valve body
-
2 pcs.
2 pcs.
-
4 pcs.
Furthermore you should prepare the following items for installation:
Union
3 pcs.
Ball Valve
2 pcs.
Thermometer
1 pcs.
Pressure Gauge
2 pcs.
(3) Take the flow chart of the MX1N and confirm that your hot water flow
will be within the minimum and maximum limits shown in the flow chart.
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2. Installation
(1) Fix the Mixing Valve with the Bottom Flange to the wall.
Dimensions:
Fig. 1
Dimensions
inches and millimeters
Connections
L
L1
H
H1
H2
A
B
½”
3.9 5.4 5.3 1.7 1.8 2.4 4.0
¾”
100 138 134 43
47
62 102
5.5 7.0 6.6 2.2 2.0 3.4 5.8
Screwed
1”
140 179 168 57
51
86 147
6.3 7.4 7.8 2.8 2.4 3.4 5.8
1 ½”
160 189 197 70
60
86 147
Attention: The dimensions of the MX1N with NPT threads do not correspond with the above table. Please, refer to the Miyawaki Product drawing of the related valve. Size
(2) Connect the steam pipe with the steam inlet of the valve and the cold water pipe
with the water inlet of the valve (Refer to the marks “STEAM” and “WATER” on
the body).
Fig. 2
5
(3) As you can see in Fig. 2 we recommend to install as well Strainer and Check
Valve in the lines as Ball Valve, Pressure Gauge and Thermometer.
(4) The Mixing Valve has two outlets. One of them is closed by a plug. Dependent on
the requirements each outlet can be used. It is possible to use both outlets at the
same time, too.
(5) To remove the Mixing Valve easily for maintenance it is recommended to
connect all pipes with unions to the valve.
Fig. 3
(6) In case of fluctuating steam pressure it is recommended to install a steam
pressure reducing valve (we recommend Type RE from MIYAWAKI) to stabilize
the pressure.
The same should be done in case of unstable water pressure.
The functioning of the Mixing Valve may be affected adversely in case of
unstable inlet pressures.
(7) Please, install only items with low flow resistance in the hot water line (for
instance take Ball valves with full bore) to reduce the back pressure to a
minimum.
(8) Pay attention that the size of the hose at the hot water outlet is the same as the
connecting size of the Mixing Valve. Otherwise it may happen that the hot water
flow will be too low and the Mixing Valve will not operate.
6
3. Operation of the Mixing Valve
For safety reasons the blue handle is setted at cold water temperature at the time of
delivery.
When using the Mixing Valve the first time, please, pay attention to the following:
(1) Open the cold water inlet and the hot water outlet and check whether cold water
is discharging from the hot water outlet.
(2) Now open slowly the ball valve at the steam inlet pipe. Turn the blue handle
slowly to the right until stopped by the red safety button.
Do not push the red safety button.
The hot water must reach now a temperature of about 40°C (104°F).
Fig. 4
(3) In case a higher hot water temperature is requested, push the red safety button
and turn the blue handle to the right. Stop when the requested hot water
temperature will be reached.
Fig. 5
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4. Troubleshooting
Trouble
No hot water
Hot Water is flowing only
temporarily.
The blue knob is turned to
lower temperature, but
temperature remains high.
Possible Problem
Ratio of steam pressure to
water pressure is higher
than 3:1 or 1:3
(see point 1.1).
The cold water pressure
is lower than 0,35 bar.
The hot water flow is
smaller than the requested
minimum flow
(see point 1.3.).
The steam inlet valve is
closed.
The steam side strainer
is plugged
No steam is coming to the
inlet.
Internal strainer (No. 42)
is plugged.
Diaphragm (No. 11) is not
working.
Diaphragm unit is not
working.
Bimetal unit is not
working (rusty).
Either steam pressure or
water pressure are
fluctuating rapidly.
The main valve is not
closing.
Measures
Change the steam or water
pressure until the
necessary ratio will be
reached.
Increase water pressure
Change the pipe size. If not
possible contact
MIYAWAKI.
Open the steam inlet
slowly.
Clean the strainer.
Check, whether the check
valve is installed correctly.
Clean the strainer.
Change the diaphragm.
Check, whether the shaft
can be moved. If not, clean
the shaft.
Change the bimetal unit.
Try to stabilize the inlet
steam and water pressure.
Clean the main valve. If
there will be no result,
change the main valve unit.
The shaft of the diaphragm Clean the shaft or change
unit is not moving.
it.
The bimetal unit is not
Change the bimetal unit.
working.
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5.
Maintenance
5.1.
Disassembly of the Valve
(1) Loose the cover bolts ( No. 48 and No. 71, 4 pcs.)
Valve Size
½”
¾”
1”
1 ½”
Cover bolt size
10 mm (0.39”)
10 mm (0.39”)
17 mm (0.67”)
17 mm (0.67”)
Fig. 6
(2) Take out the Diaphragm Unit carefully not damaging the diaphragm.
Pay attention, that the ½” and ¾” – Valves have a pressure valve spring which
may jump out.
Fig. 7-A
Fig. 7-B
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(3) Remove the handle cap by a screwdriver (Fig. 8-A).
Loose the screw (No. 41) by a driver (Fig. 8-B) and remove the handle from the
adjust unit (Fig. 8-C).
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(4) Loose the bush (No. 35) and take it out (Fig. 9-A).
11
(5) The Main Valve can be removed by loosing the main valve seat with a socket
wrench (Fig. 10-A).
Fig. 10-A
Valve Size
½”
¾”
1”
1 ½”
Socket wrench Size
27 mm (1.06”)
27 mm (1.06”)
38 mm (1.50”)
46 mm (1.81”)
Fig. 10-B
*************************************************************************************************
After having cleaned all parts and changed the damaged ones the Mixing Valve may
be assembled in the opposite way.
(1) Screw the Main valve unit inside the body. Then fasten the Main valve unit.
Pay attention to the required torque.
Valve Size
½”
¾”
1”
1 ½”
Fastening Torque
450 kgf • cm
450 kgf • cm
800 kgf • cm
1.300 kgf • cm
(2) Screw the adjust unit carefully inside the bimetal unit (Fig. 12-A).
Then insert the unit inside the valve by turning slightly to the right and left (Fig.
12-B). Pay attention, that the O-Rings of the bimetal and adjust unit are not
damaged. Fasten the bush (No. 35) with a torque of 100 kgf • cm.
Then screw out the adjust unit slightly (Fig.12-C).
Fig. 12-A
Fig. 12-C
Fig. 12-B
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(2) Insert the diaphragm unit into the body. Pay attention that the pin hole of the
guide (No. 13) will meet the pin of the body (Fig. 13-A).
Furthermore the pin hole of the diaphragm should also meet the related pin of the
body (Fig. 13-C).
Fig. 13-A
Fig. 13-B
13
(3) Connect the cover with the body. The pin hole of the cover must meet the pin of
the body (Fig. 14).
Fasten the cover bolts with the following torque equally crosswise:
Valve Size
½”
¾”
1”
1 ½”
Fastening Torque
70 kgf • cm
70 kgf • cm
150 kgf • cm
150 kgf • cm
Fig. 14
(4) Adjust the hot water temperature to 40°C (104°F) by turning the shaft of the
adjusting unit (Fig. 15).
After adjustment of the 40°C (104°F) fix the handle to the adjust unit so that the
red safety button of the handle will correspond with the red marker on the body
(Fig. 16).
Fig. 15
Fig. 16
14
1
2
4 ~ 10
11 ~ 18
19 ~ 27 + 63 ~ 65
28 ~ 34
35
36 ~ 41
42 ~ 46
48, 71
56 ~ 57
Body
Cover
Main Valve Unit
Diaphragm Unit
Bimetal Unit
Adjust Unit
Bush
Handle Unit
Strainer Unit
Bolt
Pressure Valve Unit
(only ½”, ¾”)
MIYAWAKI Inc.
2-1-30, Tagawakita
Yodogawa-ku
Osaka 532-0021
Japan
Tel.: +81-6-6302-5549
Fax: +81-6-63025595
export@miyawaki.net
www.miyawaki.net
MIYAWAKI GmbH
Birnbaumsmühle 65
15234 Frankfurt (Oder)
Germany
Tel.: +49-335-4007-0097
Fax: +49-335-4000-122
info@miyawaki.de
www.miyawaki.de
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