Bulletin O-421C

Bulletin O-421C
bull O-421C
1/16/03
3:35 PM
Page 1
Bulletin O-421C
Magnetic Type Liquid Level Contols
Series 201, 203, 204, 251, 253, 254, 1271, 1273, 1274 - Sealed Housing with Stainless Steel Float
Series 211, 213, 214, 221, 223, 224 - Flanged Steel Float Chamber with Removable Steel Float
Installation and Operating Instructions
TYPES
TYPES
TYPES
201
251
1271
203
253
1273
204
254
1274
TYPES
TYPES
TYPES
211
221
213
223
214
224
Operating Characteristics
When the float rises to the operating point, the switch or switches are actuated by the mutual attraction between a magnetic
plunger attached to the float within the float chamber and a magnet attached to the switch operating assembly. When the float
drops, the magnetic plunger is moved out of the field of the magnet on the switch operating assembly and the switch or switches
are restored to their original position by gravity.
Wiring
Wire in accordance with local electrical codes or follow equipment
manufacturer’s instructions.
Align wiring block to face conduit opening and tighten brass screw
of switch assembly.
The 3/4˝ NPT conduit connection (on all types can be rotated 360°
to facilitate wiring.
Do not overload electrically. See rating stamped on nameplate.
The magnetic plunger attached to the float moves within a tube
within the switch enclosure. The switch unit is mounted on the
tube singly or in pairs. Type 1271 - Single Stage Only.
Operating Adjustments
Level Adjustment (Single Stage Only) Types 201, 203, 204, 211,
213, 214, 221, 223, 224, and 251, 253, 254 only. When single
stage controls are shipped from the factory, the switch operating
mechanism (illustration No. 11) is positioned at the center of the
armature tube. The operating level can be raised approximately
one inch by moving switch mechanism up to the top of the armature tube. Operating level may also be lowered one inch by moving switch mechanism down to bottom of armature tube. To obtain
either operation, loosen clamp screw (illustration No. 11) before
raising or lowering switch assembly. Be sure to tighten clamp
screw after the desired adjustment is made.
Explanation of Type and Code Numbers
Example: Type 201G-4820-C1-60.
201 is the type number of the control; letter “G” denotes enclosure; -4820 designates circuit arrangement; C1 denotes materials
of construction; 60 indicates pressure rating and specific gravity.
Enclosures
General Purpose enclosures are identified by the letter ‘G: in
type number as in 201G, 1273G.
Weather Resistant enclosures are identified by the letter “W” in
type number as in 204W, 211W.
Explosion-proof enclosures are identified by the letter”E” in type
number as in 201E, 1274E.
Explosion-proof -- Vapor-proof enclosures are identified by the
letters “EV” in type number as in 203EV, 223EV.
Special Features
Semi-Automatic (with manual reset) operates automatically on
level fall only - manual reset required on level rise. This operation
identified by the letters “RU” in type number as in 201GRU.
Wide Differential (Single Stage) available only for controls with
mercury switch contacts. Provides double the fixed level change
(“B: in Liquid Level Change Table) between on and off switch
operation. Identified by the letter “D” in type number as in 201GD.
Type 1271 Not Available.
440 Volt Service
Identified by the digit 5 in circuit specification No. such as in 5820, -5821. For two-stage operation 440V is limited to SP-ST in
each stage.
Type 1271, 1273, 1274 (Single Stage Operation) the switch operating mechanism must rest at the bottom of armature tube against
enclosure base.
LIQUID LEVEL CHANGES IN INCHES FOR SWITCH OPERATION
Series 201, 203, 204, 221, 223, 224, 251, 253, 254
Minimum Specific Gravity 0.6
Single Stage Operation
“A” is Adj. ±1˝
“B”
Code
Sp. Gr. “A”
3/4˝
6-3/4˝
1.0
1˝
C1-60
7-1/2˝
.6
Single Stage with Wide
Differential “A” Not Adjustable
Code
Sp. Gr.
“A”
“B”
1.0
7-1/2˝ 1-3/4˝
.6
8-1/4˝ 1-7/8˝ C1-60
See Illustration No. 10
Sp. Gr. “A”
5-3/4˝
1.0
6-1/2˝
.6
Two Stage Operation
“A”- Not Adjustable
“B”
“C”
“D”
3/4˝
7-3/4˝
1˝
1˝
9˝
1-3/4˝
“E”
2˝
2-1/2˝
Code
C1-60
Location -- Mounting
Select location recommended by equipment manufacturer. Mount
all controls vertically and be sure that control switch mechanism is
level.
MERCOID DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46361 U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
Lit-by-Fax: 888/891-4963
www.dwyer-inst.com
e-mail: [email protected]
bull O-421C
1/16/03
3:35 PM
Page 2
Bulletin O-421C
Page 2
Illustration No. 10
"D"
"E"
ARMATURE TUBE
"B"
Sp. Gr. “A”
5-3/4˝
1.0
7˝
.6
Two Stage Operation
“A”- Not Adjustable
“B”
“C”
“D”
3/4˝
8˝
1-1/4˝
1-1/4˝
9-1/2˝
2˝
CLAMP SCREW
"C"
MERCURY SWITCH
ASSEMBLY
"A"
3/4 NPT COND CONN
ROTATABLE TO 360°
“A” - level at which single (or lower
stage) operates on level rise.
LIQUID LEVEL CHANGES IN INCHES OF WATER FOR Series 1271,1273, 1274 - Minimum Specific Gravity 0.58
Single Stage Only
“A” Not Adjustable
FLOAT ROD
“B” - operating differential single
(or lower stage) - drop in level to
restore switch to original position.
FLOAT
Sp. Gr.
1.0
.58
“C” - level at which upper stage
operates on level rise.
“D” - operating differential of upper
stage - drop in level to restore
switch to original position.
Illustration No. 11
Single Stage Operation
Single Stage with Wide
Specific Gravity 1.0 & .75 Differential “A” Not Adjustable
“A” is Adj. ±1˝
(See Illustration No. 10)
“B”
Code
Code Sp. Gr.
“A”
“B”
Sp. Gr. “A”
3/4˝
1.0
8˝
7-1/4˝
2˝
1.0
1˝
C1-75
C1-75
.75
8-3/4˝
8˝
2˝
.75
Two Stage Operation
“A”- Not Adjustable
“B”
“C”
“D”
3/4˝
8-1/2˝
1-1/4˝
1˝
9-1/2˝
1-3/4˝
“E”
2-1/4˝
2-1/2˝
Code
C1-75
LIQUID LEVEL CHANGES IN INCHES FOR SWITCH OPERATION
Series 211, 213, 214, Minimum Specific Gravity 0.6
450 PSI at 100°F, or 300 PSI at 500°F.
“A”
6-3/4˝
8˝
“B”
3/4˝
1-1/4˝
Single Stage with Wide
Differential “A” Not Adjustable
Sp. Gr.
1.0
.6
“A”
7-1/2˝
8-3/4˝
“A” - level at which single (or lower
stage) operates on level rise.
“B” - operating differential single
(or lower stage) - drop in level to
restore switch to original position.
“E” - increase in level above “A” to
operate upper stage.
“B”
1-3/4˝
2˝
Type
203
204
253
254
"D"
"E"
"C"
214
"B"
"A"
Pressure Rating At
100°F
600 psi
1000 psi
1250 psi
and 650°F
750°F Max.
500 psi
750 psi
750 psi
Code
C1-60
C1-75
C1-75
Minimum
Pressure Rating At
Specific
100°F
Gravity
750°F Max.
275 psi
0.6
100 psi
600 psi
425 psi
600 psi
500 psi
275 psi
0.75
100 psi
720 psi
425 psi
1000 psi
750 psi
1250 psi
0.75
750 psi
and 650°F
Flange
Class PSI
150
300
600
150
300
600
600
Code
C1-160
C1-360
C1-660
C1-175
C1-375
C1-675
C1-675
Types 211, (1) vertical and (1) horizontal 1˝ NPT pipe connection
Type 213, (1) flange vertical and (1) flange horizontal 1˝ RF forged
steel.
Type 214, Both flanges vertical 1˝ RF forged steel.
Type
211
213
“C” - level at which upper stage
operates on level rise.
“D” - operating differential of upper
stage - drop in level to restore
switch to original position.
Type
201
251
Minimum
Specific
Gravity
0.6
0.75
0.75
FLANGE AND FLOAT SPECIFICATIONS
Series 203, 253: (1) one vertical and (1) horizontal flanged connection (1˝ FR forged steel - ANSI specifications.)
Series 204, 254: Two vertical flanged connection (1˝ RF forged
steel - ANSI specifications).
See Illustration No. 10
Sp. Gr.
1.0
.6
“B”
1˝
2˝
PRESSURE RATINGS
Series 201, 251
One horizontal and one vertical 1˝ NPT pipe connection.
LIQUID LEVEL CHANGES IN INCHES OF WATER FORSeries 201, 203, 204, 221, 223, 224, 251, 253, 254
Minimum Specific Gravity 0.75
Single Stage Operation
“A” is Adj. ±1”
“A”
6-11/16˝
8-1/4˝
FOR SERVICE OTHER THAN SATURATED STEAM
CONSULT FACTORY
“E” - increase in level above “A” to
operate upper stage.
Sp. Gr. “A”
6-1/4˝
1.0
7˝
.75
“E”
2-1/2˝
2-1/4˝
Minimum
Pressure Rating At
Specific
100°F
Gravity
500°F Max.
450 psi
0.6
300 psi
275 psi
0.6
150 psi
450 psi
300 psi
450 psi
300 psi
Flange
Class PSI
--150
300
600
Code
C1-60
C1-160
C1-360
C1-660
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3:35 PM
Page 3
FLANGE AND FLOAT SPECIFICATIONS
Series 221, 223, 224
One vertical and one horizontal 1˝ NPT pipe connection.
Type 221: (1) vertical and (1) horizontal 1˝ NPT pipe connection.
Type 223: (1) flange vertical and (1) flange horizontal 1˝ RF forged
steel.
Type 224: Both flanges vertical 1˝ RF forged steel.
Type
221
223
224
Minimum
Pressure Rating At
Specific
100°F
Gravity
475°F Max.
600 psi
0.6
550 psi
1000 psi
0.75
850 psi
600 psi
550 psi
600 psi
0.6
550 psi
275 psi
150 psi
720 psi
0.75
625 psi
1000 psi
850 psi
Flange
Class PSI
----300
600
150
300
600
Code
C1-60
C1-75
C1-360
C1-660
C1-175
C1-375
C1-675
Type 1271: (1) vertical and (1) horizontal 1˝ socket weld pipe connection.
Type 1273: (1) flange vertical and (1) flange horizontal 1˝ RF forged
steel.
Type 1274: Both flanges vertical 1˝ RF forged steel.
Type
1271
1273
1274
Minimum
Specific
Gravity
0.58
0.58
0.58
0.58
0.58
Pressure Rating At
660°F
2325 psi
1520 psi
2325 psi
1520 psi
2325 psi
Flange
Class PSI
--900
1500
900
1500
Code
C1-58
C1-958
C1-1558
C1-958
C1-1558
CIRCUIT ARRANGEMENTS
Controls with Mercury Switches
Single Stage Only
Specification No.
Circuit
Arrangement
120/240 V
-4820
-4821
-4815
440 V
-5820
-5821
-5815
SP-ST
SP-ST
SP-DT
-4814
-4813
-5814
-5813
DP-ST
DP-ST
Circuit Response
to Liquid Level
Changes
Closes As Level Falls
Closes As Level Rises
One Circuit Closes As
Other Circuit Opens
Closes As Level Falls
Closes As Level Rises
Two-Stage Operation (With Mercury Switches). Any two circuits shown
in circuit arrangement table are available on each stage for 120/240 volts.
Example: -4820-13 designates a SP-ST lower stage to close as level falls
and a DP-ST upper stage opens as level falls.
Circuit Arrangements
With Snap-Acting Switches
Single Stage
Specification No. -7810 (1) SP-DT Switch
Specification No. -7806 (2) SP-DT Switches
Two Stage
Specification No. -7810-10 SP-DT Each Stage.
Specification No. -7806-06 DP-DT Each Stage.
Do not oil any parts. Never leave cover off the switch operating
mechanism. Do not tamper with switch wires. Position of these
wires is essential to proper operation. Tampering with these wires
will void warranty.
bull O-421C
1/16/03
3:35 PM
Page 4
©Copyright 2003 Dwyer Instruments, Inc.
Printed in U.S.A. 1/03
MERCOID DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46361 U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
Lit-by-Fax: 888/891-4963
FR# 97-441673-00 Rev.1
www.dwyer-inst.com
e-mail: [email protected]
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