THERMODISC 1970

SELECTION
GUIDE FOR
FIXED SETTING CONTROLS
ADJUSTABLE CONTROLS
UtTHMM AT ®
DEPENDABLE
TEMPERATURE
CONTROLS
Engineering of Controls for
Volume Production
Applications.
l Features of typical controls
including Fixed Setting,
Adjustable, and Special
Purpose Types.
SPECIAL PURPOSE CONTROLS
How to Get More Information and Assistance in
Selecting the Right Control.
EMSiSOM EL'CTJC
T H E R M O-DISC DIVISION
jess IVAÎBUMGEM
Hesrstraîs 111 Posifach 12 23
If you have a temperature control problem for a volume p r o d u c t i o n application,
Therm-O-Disc can help you solve it. During the past 20 years, we have developed
more than 50 controls in c o o p e r a t i o n with
o u r c u s t o m e r s . M a n y of t h e s e a p p l i e d
new principles d e v e l o p e d by Therm-ODisc Research. Some were modifications
of existing designs.
This bulletin includes brief d e s c r i p t i o n s
and representative ratings of fixed setting, adjustable, and special purpose
controls w h i c h are currently in product i o n . If y o u n e e d a c o n t r o l t h a t is not
i l l u s t r a t e d , o r o n e w i t h an e l e c t r i c a l
rating that is not listed, ask us about it.
Chances are that we can meet your requirements. There is a request form on
the next page for y o u r convenience.
WHO WE ARE
Therm-O-Disc, I n c o r p o r a t e d was organized in Mansfield, Ohio in 1948 to manufacture bimetal blade thermostats for
electric water heaters. This control incorporated major design innovations,
and was followed a year later by a bimetal disc thermostat w h i c h operated on
the "free d i s c " p r i n c i p l e — a completely
new concept.
T h e r m - O - D i s c has c o n t i n u e d its e m phasis on engineering research and this
effort has established the c o m p a n y as a
leader in the temperature controls field.
E Control Application Notes.
This c o m m i t m e n t to excellence in engineering is s u p p o r t e d by c o m p l e t e design
and testing facilities.
Therm-O-Disc controls are manufactured
at two l o c a t i o n s — i n Mansfield, Ohio, and
in St. T h o m a s , O n t a r i o , C a n a d a . T h e
h e a d q u a r t e r s p l a n t in M a n s f i e l d is located on a 100-acre plot, and now covers
more than 237,000 square feet. The St.
Thomas plant, built in 1961, is a manuf a c t u r i n g facility, and covers 37,400
square feet.
WHO WE SERVE
Most of our customers are in the appliance industry. They include companies
which produce electric water heaters,
gas and electric home heating devices,
refrigerators, room air conditioners, automobile air conditioners, clothes dryers,
table appliances, liquid and food dispensing machines. In addition, we make
thermostats for marine engines, for engine lubrication systems in military vehicles, and for many other purposes.
HOW WE OPERATE
We are prepared to assist you in the way
w h i c h best meets y o u r needs. You may
request one of our Therm-O-Disc Field
Sales Engineers to assist in selecting the
proper control for your application. If you
prefer, you may write or telephone us in
Mansfield and discuss your requirem e n t s . Or, if s e v e r a l of t h e c o n t r o l s
shown appear to fit your application, we
can mail you the appropriate bulletins
w h i c h contain more detailed information.
Our controls are manufactured to order
to meet the special requirements of each
customer, and are not carried in inventory as " s t o c k " items. Sample controls
u s u a l l y c a n be s u p p l i e d w i t h i n s e v e n
days, and p r o d u c t i o n orders within four
weeks.
SELECTION AND
APPLICATION
The most important factors in selecting a
temperature control are listed on the request form shown on the following page.
While additional details may be necessary to provide correct sample controls,
these facts will enable us to select the
basic design you need.
Each control permits a wide c h o i c e of
mounting arrangements, terminal configurations, and s w i t c h actions. These and
other factors to be considered are discussed on the back page.
We invite you to review the general information in this bulletin, then ask us to
provide the facts you need or take the
action you want.
^Sëyy
i
ULTIMHEEAT
VIRTUAL IV USEUM
!
36TX
FIXED SETTING
Bimetal Disc
TEMPERATURE
CONTROLS
T h e bimetal disc element of these controls is dished or c u r v e d like the surface
of a sphere. When the c a l i b r a t e d t e m p e r ature is reached, the disc snaps t h r o u g h
rapidly and actuates a switch w h i c h may
be SPST, SPDT, o r m a n u a l reset. T h e
great speed of this snap action provides
fast contact " m a k e " and " b r e a k " for long
c o n t a c t l i f e at h i g h e l e c t r i c a l l o a d s .
T h e s e c o n t r o l s are a v a i l a b l e w i t h e x posed or e n c l o s e d discs. The e x p o s e d
disc provides m a x i m u m sensitivity, w h i l e
the e n c l o s e d d e s i g n offers extra protection from dirt, dust and lint.
These are snap-action c o n t r o l s w h i c h are
factory c a l i b r a t e d to y o u r exact temperature specifications. They are used for
temperature limiting and temperature
regulating applications up to 350°F. w h e r e
a non-adjustable control is suitable.
and V2". The smaller the disc the lower
t h e p r i c e , b u t the l a r g e r d i s c s p e r m i t
higher electrical switch capacities and
more precise t e m p e r a t u r e control. All of
t h e c o n t r o l s are d e s i g n e d to p r o v i d e
m a x i m u m useable c o n t a c t pressure, and
h a v e a s w i t c h c h a m b e r to p r o t e c t the
contacts f r o m contamination. Every possible step is taken to provide dependable
operation.
Four basic disc diameters are e m p l o y e d
in these controls. They are IV2", 1", % " ,
REPRESENTATIVE
SERIES
DESCRIPTION
TYPICAL
APPLICATIONS
Inductive
Full Load
11T
1 " d i s c . Universal b i m e t a l disc c o n t r o l . SPST
and SPDT. Narrow d i f f e r e n t i a l . " W o r k h o r s e "
of t h e I n d u s t r y .
Clothes Dryers, Gas and E l e c t r i c Heating, Liquid
and Food D i s p e n s i n g Machines.
36T
W
disc. Smallest
c o n t r o l . SPST.
Dishwashers,
Appliances.
36TX
Same as above e x c e p t w i t h increased
trical clearances.
38T
V 2 " disc. L o w e s t c o s t c o n t r o l . SPST.
41T
W
disc. Standard manual reset l i m i t
t r o l . SPST.
60T
HL
high
capcity
universal
elec-
Electric
Percolators,
Other
Portable
Heating.
Hair Dryers
and
Curlers, Electric
Heat
Tapes.
ELECTRICAL
RATINGS
Amperes
Resistive
Volts
Locked Rotor
Amperes
AC
10.0
5.0
60.0
30.0
25.0
25.0
120
240
5.8
2.9
34.8
13.0
10.0
10.0
120
240
5.8
2.9
34.8
13.0
15.0
10.5
9.3
120
240
277
5.0
2.5
120
240
—
Clothes Dryers. Gas and Electric
Heating.
10.0
45.0
25.0
25.0
15.0
120/240
277
600
W
d i s c . S t a n d a r d SPST design. Used f o r
t e m p e r a t u r e l i m i t i n g or t e m p e r a t u r e r e g u l a t ing. Also SPDT.
Clothes
Heating.
10.0
5.0
60,0
30.0
25.0
25.0
21.6
12.5
10.0
120
240
277
480
600
I V 2 " disc. High e l e c t r i c a l
reset l i m i t c o n t r o l . DPST.
E l e c t r i c Heating.
50.0
25.0
120/240
480
capacity
con-
manual
Dryers. Gas and E l e c t r i c
—
—
Most adjustable controls respond to the
flexing of a bimetal leaf or blade. They
are available with snap-action or creeptype contacts, and are used mainly for
temperature regulating or control. Calibrations are available as high as 500°F.
T h e b i m e t a l b l a d e of t h e s e c o n t r o l s is
fixed at one end, while the other end is
free to flex with temperature change. The
f o r c e d e v e l o p e d is u s e d to a c t u a t e a
snap-action switch, or to directly operate
a set of contacts by slowly moving them
apart or t o g e t h e r .
ADJUSTABLE
Blade and Disc
TEMPERATURE
CONTROLS
R e s e a r c h . T h i s new p a t e n t a b l e d e s i g n
c o m b i n e s t h e f e a t u r e of an a d j u s t a b l e
t e m p e r a t u r e range w i t h the power and
d e p e n d a b i l i t y of a bimetal disc.
Snap-action bimetal blade controls are
available with differentials as narrow as
3 ± 1°F., and may be used to replace
more expensive capillary controls on
many applications. Bimetal blade controls with creep-type contacts are generally the lowest priced, but their capacity
is limited to approximately 1650 watts at
1 2 0 / 2 4 0 VAC.
N o w an a d j u s t a b l e c o n t r o l u t i l i z i n g a
bimetal disc as the temperature sensor
has b e e n d e v e l o p e d by T h e r m - O - D i s c
REPRESENTATIVE
DESCRIPTION
SERIES
50T
Precision t e m p e r a t u r e
TYPICAL
control.
Narrow
dif-
f e r e n t i a l and t o l e r a n c e s . SPST. Double break
in " o f f "
AW
A
blade.
make-and-break
AF
40T
Electric Heating, Window Air C o n d i t i o n i n g , and
F u l l Load
Locked Rotor
14.0
84.0
Refrigeration.
Adjustable
to
E l e c t r i c Water Heaters.
500°F.
Slow
Portable and Table Top Appliances.
contacts.
_
_
_
-
Fan c o n t r o l . B i m e t a l blade s e n s i n g e l e m e n t
Room and U n i t Heaters. Air C o n d i t i o n i n g and
4.4
26.4
extends K s " i n t o the a i r s t r e a m .
Ventilating Equipment.
2.2
13.2
Fan c o n t r o l .
Bimetal
disc
sensing
extends 3" i n t o t h e a i r s t r e a m .
NOTE:
ELECTRICAL
Inductive Amperes
RATINGS
Resistive
Volts
Amperes
AC
17.0
120/240
17.0
277
25.0
120/240
12.5
480
position.
Temperature regulating control.
Bimetal
APPLICATIONS
element
Standard Fan C o n t r o l f o r Gas or E l e c t r i c Heat-
16.0
72.0
ing Systems.
10.0
60.0
13.75
120
6.88
240
-
240
120
125
-
250
All c o n t r o l s shown (except Series A and 30T) carry a m i n i m u m pilot duty rating of 125 volt-amperes at their
rated voltages. For more complete ratings consult factory.
CONTROL APPLICATION NOTES
T h e t h r e e basic c o n s i d e r a t i o n s in the s e l e c t i o n of the p r o p e r t e m p e r a t u r e c o n t r o l are
the e l e c t r i c a l , t h e r m a l , a n d p h y s i c a l r e q u i r e m e n t s of the a p p l i c a t i o n . P r o p e r a t t e n t i o n
to t h e s e f a c t o r s is m o s t i m p o r t a n t in t h e s e l e c t i o n of the b a s i c c o n t r o l a n d s p e c i f i c
v a r i a t i o n s . W e r e c o m m e n d t h a t y o u avail y o u r s e l f of o u r E n g i n e e r i n g s e r v i c e in m a k ing t h i s s e l e c t i o n a n d in r e d u c i n g a p p l i c a t i o n test time.
A T h e r m - O - D i s c Field Sales E n g i n e e r is c l o s e at h a n d a n d is s u p p o r t e d by the Sales
E n g i n e e r i n g D e p a r t m e n t w h i c h is s t a f f e d by t r a i n e d E n g i n e e r s . B o t h are b a c k e d by
complete research and engineering facilities.
Electrical
Requirements
T h e a p p l i c a t i o n need s h o u l d be d e t e r m i n e d in t e r m s of e l e c t r i c a l l o a d t o be
controlled, switch action, and required
c y c l e life. C o n t a c t r a t i n g s vary f r o m m i l l i a m p e r e s a n d m i l l i v o l t s , up t h r o u g h 6 a n d
12 KW, a n d t h r o u g h 480 V A C . S w i t c h i n g
actions include single-pole single-throw,
single-pole double-throw, double-pole
s i n g l e - t h r o w , a n d m a n u a l reset. E n d u r a n c e c y c l e r a t i n g s v a r y f r o m 6 , 0 0 0 to
100,000 c y c l e s .
Physical
Requirements
Physical c o n s i d e r a t i o n s i n c l u d e size,
terminal arrangements, and mounting.
T h e r m - O - D i s c t e m p e r a t u r e c o n t r o l s are
a v a i l a b l e w i t h a c h o i c e of t e r m i n a l s a n d
mounting arrangements.
Standard screw and blade-type terminals
are a v a i l a b l e . O n m o s t c o n t r o l s , the term i n a l s c a n be f o r m e d at d i f f e r e n t p o s i t i o n s to p r o v i d e b e t t e r c l e a r a n c e s a n d
easier connection.
B i m e t a l d i s c t h e r m o s t a t s may be m o u n t e d
w i t h the b i m e t a l in c l o s e c o n t a c t w i t h the
surface for c o n d u c t i o n temperature
sensing, or e x t e n d e d into the m e d i u m
for c o n v e c t i o n or r a d i a t i o n s e n s i n g . (See
i l l u s t r a t i o n b e l o w . ) A w i d e v a r i e t y of
m o u n t i n g f l a n g e s is a v a i l a b l e to meet
i n d i v i d u a l needs.
AIR STREAM MOUNTING
SURFACE MOUNTING
B i m e t a l d i s c t h e r m o s t a t s m a y also have
e x p o s e d or e n c l o s e d d i s c s . W h e n e n v i ronmental conditions exist w h i c h may
c o n t a m i n a t e the c o n t a c t s , it is s u g g e s t e d
t h a t the d i s c be e n c l o s e d by the s t a i n l e s s
steel c u p w h i c h is part of the m o u n t i n g
f l a n g e as s h o w n b e l o w .
o v e r - r i d e t e m p e r a t u r e s w h i c h m a y b e exp e r i e n c e d Under a b n o r m a l c o n d i t i o n s .
W h e n the c o n t r o l has b e e n s e l e c t e d that
meets t h e e l e c t r i c a l a n d p h y s i c a l r e q u i r e ments, it is r e c o m m e n d e d that initial t e m p e r a t u r e tests be c o n d u c t e d w i t h a n o n operating control equipped with a therm o c o u p l e c o n n e c t e d to the bimetal. The
t h e r m o c o u p l e s a m p l e s h o u l d be i n s t a l l e d
in t h e a p p l i c a t i o n as i n t e n d e d , a n d t h e
e q u i p m e n t m a n u a l l y c o n t r o l l e d w h i l e the
c o r r e s p o n d i n g b i m e t a l t e m p e r a t u r e s are
recorded.
E v a l u a t i o n of t h i s test i n f o r m a t i o n w i l l
g u i d e the p r o p e r s e l e c t i o n of c a l i b r a t e d
samples.
When ordering a thermocouple sample,
p l e a s e s p e c i f y e i t h e r i r o n or c o p p e r c o n stantan lead, and the length desired.
S t a n d a r d t h e r m o c o u p l e w i r e s i z e is 30
gauge.
GENERAL
INFORMATION
Differential,
Calibration
and Tolerances
Generally speaking, a blade type control
c a l i b r a t i o n w i l l be s p e c i f i e d by a n o p e n ing o r c l o s i n g t e m p e r a t u r e , a n d a t e m perature differential. Example: Open
150 ± 5 ° F „ D i f f e r e n t i a l 20 ± 5°F.
A b i m e t a l d i s c t h e r m o s t a t , on t h e o t h e r
h a n d , will be s p e c i f i e d b y b o t h the o p e n ing a n d c l o s i n g t e m p e r a t u r e s . E x a m p l e :
O p e n at 160 ± 5 ' F . , C l o s e at 150 ± 5°F.
EXPOSED DISC
Top
Temperature
Setting
Between
(°F.)
0 t o 79
Mean D i f f e r e n t i a l
( B e t w e e n Top
Setting &
B o t t o m Reset)
(°F.)
Manufacturing
Tolerances
Open
CF.)
10 t o 14
.• 5
±
5
15 t o 19
± 5
st
5
20 t o 29
H.5
+
6
40 t o 60
± 5
jfc 8
10 t o 14
±5
+
5
15 t o 19
•1-5
±
5
20 to 29
± 5
sfc 5
30 t o 39
±•5
±
6
40 t o 60
+5
±
8
6
30 to 39
80 t o 2 0 0
2 0 1 to 2 5 0
Close
(°F.)
±1
15 to 19
± 5
±
20 t o 29
± 5
dfc 6
30 t o 39
•+ 5
sfc 7
40 t o 60
±6
±
9
30 t o 39
± 6
±
8
40 to 60
± 7
±10
30 t o 39
+1
±10
40 t o 60
± 8
±12
Testing Agency
Recognition
A l l T h e r m - O - D i s c c o n t r o l s are t h o r o u g h l y
t e s t e d a n d a r e r e c o g n i z e d by t h e a p p r o p r i a t e a g e n c i e s i n c l u d i n g UL, A G A , a n d
CSA. O u r f i e l d Sales E n g i n e e r s o r f a c t o r y
Sales Engineers can provide you with
complete information.
No matter which Therm-O-Disc control
is s e l e c t e d for y o u r a p p l i c a t i o n , y o u w i l l
get d e p e n d a b l e o p e r a t i o n . . . the result
of s o u n d e n g i n e e r i n g , c o n t r o l l e d m a n u f a c t u r i n g , a n d t h o r o u g h t e s t i n g . W e reco g n i z e the i m p o r t a n c e of d e p e n d a b l e
s e r v i c e , t o o ! Let us h e l p y o u b e c o m e o n e
of our v a l u e d c u s t o m e r s .
INCORPORATED
ENCLOSED DISC
Requirements
E a c h series of c o n t r o l s has a m a x i m u m
temperature rating, and these vary from
200°F. u p to 525°F. T h e c o n t r o l s e l e c t e d
must be d e s i g n e d a n d rated f o r the normal o p e r a t i n g t e m p e r a t u r e s to be enc o u n t e r e d in the a p p l i c a t i o n , as w e l l as
Bulletin SG/0370
described
60T S E R I E S SPST % " D I S C T H E R M O S T A T
3 0 1 t o 350
The temperature difference between the
o p e n i n g a n d c l o s i n g of the c o n t r o l c o n t a c t s is c a l l e d the " d i f f e r e n t i a l " a n d is
e x p r e s s e d in d e g r e e s F a h r e n h e i t . T h e
calibration and manufacturing tolerances
are b a s e d o n t h e m o s t i m p o r t a n t t e m p e r a t u r e t o be c o n t r o l l e d .
is
E a c h c o n t r o l h a s s t a n d a r d rafigesut^Tinfa HEAT
t e m p e r a t u r e c a l i b r a t i o n for sisl^ntfGlAI
MUSEUM
temperature differentials. Manufacturing
t o l e r a n c e s for o p e n i n g a n d c l o s i h g t e m p e r a t u r e s w i l l also v a r y w i t h d i f f e r e n t i a l
a n d range. T h e t a b l e b e l o w s h o w s t h e s e
f i g u r e s f o r the 60T series S P S T t h e r m o stat w i t h % " d i s c . T h i s t y p e of i n f o r m a t i o n is a v a i l a b l e f o r e a c h T h e r m - O - D i s c
control.
251 to 300
THERM-O-DISC,
Thermal
(The d i f f e r e n t i a l
mean.)
A S U B S I D I A R Y OF
E M E R S O N E L E C T R I C CO.
1 3 2 0 S O U T H M A I N STREET
MANSFIELD, OHIO
l = M I = R 5 D N
44907
TELEPHONE (419) 7 5 6 - 5 9 1 1
Printed in U . S . A .
I
REQUEST FOR
FROM:
MORE INFORMATION
OR ASSISTANCE
IN THE SELECTION
T I T L E OR
FUMCTION
TEMPERATURE
CONTROLS
After c h e c k i n g the action desired and filling in the essential
information, please mail this form or a copy to Therm-O-Disc
at the address shown below. If you prefer to telephone your
request, please call us at (419) 756-5911.
Please send me product bulletins showing complete details on these controls:
Please have your Field Sales Engineer in this area contact me. My application will require about
controls per year, and I plan to order about
at one time.
Please help me select the proper temperature control. My requirements are indicated below:
1.
Application:
4. Contact
a. Brief d e s c r i p t i o n of p r o d u c t and
8.
Action:
a. S P S T
(Single-Pole
Single-
a. Specify if other than clean,
dry
air (dirt, dust, lint or moisture c o n -
Throw)
p u r p o s e of t h e r m o s t a t :
Environment:
ditions):
b. If SPST, i n d i c a t e if c o n t a c t s o p e n
on t e m p e r a t u r e rise
, or close
on t e m p e r a t u r e rise
2. Thermostat
c. S P D T
Function:
a. T e m p e r a t u r e limiting
, Tempera-
ture c o n t r o l l i n g
b. A u t o m a t i c
reset
(Single-Pole
,
d. If a d j u s t a b l e , i n d i c a t e r a n g e of
of annual
quantity
requireper year.
d. Specify if o t h e r :
10. Production
5. Thermostat
, Non-adjustable
9. Estimate
ments:
Manual
reset
c. Adjustable,
Double-
Throw)
one
Calibration:
a. Open at
°F.,
Close at
°F.
quantity
to be ordered
at
time:
adjustment:
6. Life Requirement:
3. Electrical
cycles.
Load:
a. Resistive
, Inductive
b. A m p e r a g e
c. AC • , DC
Voltage
•.
7. Thermostat
a. A i r Stream
b. S u r f a c e
Mounting:
Leadership through research
THERM-O-DISC, INCORPORATED
1320 S o u t h
Main Street
•
Mansfield, Ohio
44907
CONTROL APPLICATION NOTES
T h e t h r e e b a s i c c o n s i d e r a t i o n s in t h e s e l e c t i o n of the p r o p e r t e m p e r a t u r e c o n t r o l are
the e l e c t r i c a l , t h e r m a l , a n d p h y s i c a l r e q u i r e m e n t s of the a p p l i c a t i o n . P r o p e r a t t e n t i o n
to these f a c t o r s is m o s t i m p o r t a n t in the s e l e c t i o n of the b a s i c c o n t r o l a n d s p e c i f i c
v a r i a t i o n s . W e r e c o m m e n d t h a t y o u avail y o u r s e l f of o u r E n g i n e e r i n g s e r v i c e in m a k ing t h i s s e l e c t i o n a n d in r e d u c i n g a p p l i c a t i o n test t i m e .
A T h e r m - O - D i s c Field Sales E n g i n e e r is c l o s e at h a n d a n d is s u p p o r t e d b y t h e Sales
E n g i n e e r i n g D e p a r t m e n t w h i c h is s t a f f e d by t r a i n e d E n g i n e e r s . B o t h a r e b a c k e d by
complete research and engineering facilities.
Electrical
Requirements
T h e a p p l i c a t i o n n e e d s h o u l d be d e t e r m i n e d in t e r m s of e l e c t r i c a l l o a d to be
controlled, switch action, and required
c y c l e life. C o n t a c t r a t i n g s vary f r o m m i l l i a m p e r e s a n d m i l l i v o l t s , up t h r o u g h 6 a n d
12 KW, a n d t h r o u g h 480 V A C . S w i t c h i n g
actions include single-pole single-throw,
single-pole double-throw, double-pole
s i n g l e - t h r o w , a n d m a n u a l reset. E n d u r a n c e c y c l e r a t i n g s v a r y f r o m 6,000 to
100,000 c y c l e s .
Physical
Requirements
P h y s i c a l c o n s i d e r a t i o n s i n c l u d e size,
terminal arrangements, and mounting.
T h e r m - O - D i s c t e m p e r a t u r e c o n t r o l s are
available with a choice of terminals and
mounting arrangements.
Standard screw and blade-type terminals
are a v a i l a b l e . O n m o s t c o n t r o l s , the term i n a l s c a n be f o r m e d at d i f f e r e n t p o s i t i o n s to p r o v i d e b e t t e r c l e a r a n c e s a n d
easier connection.
B i m e t a l d i s c t h e r m o s t a t s m a y be m o u n t e d
w i t h the b i m e t a l in c l o s e c o n t a c t w i t h t h e
surface for c o n d u c t i o n t e m p e r a t u r e
sensing, or e x t e n d e d into the m e d i u m
f o r c o n v e c t i o n o r r a d i a t i o n s e n s i n g . (See
i l l u s t r a t i o n b e l o w . ) A w i d e v a r i e t y of
m o u n t i n g f l a n g e s is a v a i l a b l e to meet
i n d i v i d u a l needs.
AIR STREAM MOUNTING
SURFACE MOUNTING
B i m e t a l d i s c t h e r m o s t a t s m a y also have
e x p o s e d or e n c l o s e d d i s c s . W h e n e n v i r o n m e n t a l c o n d i t i o n s exist w h i c h m a y
c o n t a m i n a t e the c o n t a c t s , it is s u g g e s t e d
t h a t t h e d i s c be e n c l o s e d by the s t a i n l e s s
steel c u p w h i c h is part of the m o u n t i n g
f l a n g e as s h o w n b e l o w .
o v e r - r i d e t e m p e r a t u r e s w h i c h m a y be exp e r i e n c e d Under a b n o r m a l c o n d i t i o n s .
W h e n the c o n t r o l has b e e n s e l e c t e d t h a t
meets the e l e c t r i c a l a n d p h y s i c a l r e q u i r e m e n t s , it is r e c o m m e n d e d t h a t initial t e m p e r a t u r e t e s t s be c o n d u c t e d w i t h a n o n operating control equipped with a therm o c o u p l e c o n n e c t e d t o the b i m e t a l . T h e
t h e r m o c o u p l e s a m p l e s h o u l d be i n s t a l l e d
in t h e a p p l i c a t i o n as i n t e n d e d , a n d t h e
equipment manually controlled while the
c o r r e s p o n d i n g b i m e t a l t e m p e r a t u r e s are
recorded.
E v a l u a t i o n of t h i s test i n f o r m a t i o n w i l l
g u i d e the p r o p e r s e l e c t i o n of c a l i b r a t e d
samples.
When ordering a thermocouple sample,
p l e a s e s p e c i f y e i t h e r i r o n or c o p p e r c o n stantan lead, and the length desired.
S t a n d a r d t h e r m o c o u p l e w i r e size is 30
gauge.
GENERAL
INFORMATION
Differential,
Calibration
and Tolerances
EXPOSED DISC
A b i m e t a l d i s c t h e r m o s t a t , on the o t h e r
h a n d , w i l l be s p e c i f i e d b y b o t h the o p e n ing a n d c l o s i n g t e m p e r a t u r e s . E x a m p l e :
O p e n at 160 ± 5°F., C l o s e at 150 ± 5°F.
C Ê X v
describi
Top
Temperature
Setting
Between
(°F.)
0 t o 79
80 to 200
2 0 1 to 250
DISC THERMOSTAT
Mean Differential
(Between Top
Setting &
B o t t o m Reset)
(°F.)
Manufacturing
Tolerances
Open
(°F.)
Close
(°F.)
10 to 14
+5
±
15 t o 19
± 5
±
5
20 to 29
± 5
±
6
30 to 39
±5
±
7
40 t o 60
±5
±
8
10 t o 14
±5
±
5
15 t o 19
±5
±
5
20 to 29
±5
±
5
30 t o 39
±5
±
6
40 to 60
±5
±
8
5
15 to 19
± 5
±
6
20 t o 29
± 5
±
6
30 t o 39
± 5
±
7
40 to 60
±6
±
9
3 0 t o 39
± 6
±
8
40 to 60
± 7
±10
30 t o 39
±7
±10
40 t o 60
±8
±12
Testing Agency
Recognition
A l l T h e r m - O - D i s c c o n t r o l s are t h o r o u g h l y
t e s t e d a n d are r e c o g n i z e d by the a p p r o p r i a t e a g e n c i e s i n c l u d i n g UL, A G A , a n d
CSA. O u r f i e l d Sales E n g i n e e r s or f a c t o r y
S a l e s E n g i n e e r s can p r o v i d e y o u w i t h
complete information.
No m a t t e r w h i c h T h e r m - O - D i s c c o n t r o l
is s e l e c t e d for y o u r a p p l i c a t i o n , y o u w i l l
get d e p e n d a b l e o p e r a t i o n . . . the result
of s o u n d e n g i n e e r i n g , c o n t r o l l e d m a n u f a c t u r i n g , a n d t h o r o u g h t e s t i n g . W e reco g n i z e t h e i m p o r t a n c e of d e p e n d a b l e
s e r v i c e , t o o ! Let us h e l p y o u b e c o m e o n e
of o u r v a l u e d c u s t o m e r s .
( f ^ L O U ^ -
INCORPORATED
ENCLOSED DISC
S U B S I D I A R Y OF
Requirements
E a c h s e r i e s of c o n t r o l s has a m a x i m u m
t e m p e r a t u r e rating, a n d t h e s e v a r y f r o m
200°F. up to 525°F. T h e c o n t r o l s e l e c t e d
m u s t be d e s i g n e d a n d rated f o r t h e normal o p e r a t i n g t e m p e r a t u r e s to be enc o u n t e r e d in the a p p l i c a t i o n , as w e l l as
Bulletin 60T/0170
60T S E R I E S SPST W
3 0 1 to 350
The temperature difference between the
o p e n i n g a n d c l o s i n g of t h e c o n t r o l c o n t a c t s is c a l l e d t h e " d i f f e r e n t i a l " a n d is
e x p r e s s e d in d e g r e e s F a h r e n h e i t . T h e
calibration and manufacturing tolerances
a r e b a s e d o n the m o s t i m p o r t a n t t e m p e r a t u r e t o be c o n t r o l l e d .
Generally speaking, a blade type control
c a l i b r a t i o n w i l l be s p e c i f i e d by an o p e n ing o r c l o s i n g t e m p e r a t u r e , a n d a t e m perature differential. Example: Open
150 ± 5°F., D i f f e r e n t i a l 20 ± 5°F.
is
E a c h c o n t r o l h a s s t a n d a r c rangfcTlMHE kl
t e m p e r a t u r e c a l i b r a t i o n f rVqRiHJfltcMub
temperature differentials. Mènufacturinq
t o l e r a n c e s for o p e n i n g a n d c l o s i n g t e m p e r a t u r e s w i l l also v a r y w i t h d i f f e r e n t i a l
a n d range. T h e t a b l e b e l o w s h o w s t h e s e
f i g u r e s for the 6 0 T series S P S T t h e r m o stat w i t h % " d i s c . T h i s t y p e of i n f o r m a t i o n is a v a i l a b l e for e a c h T h e r m - O - D i s c
control.
251 to 300
THERM-O-DISC,
Thermal
(The d i f f e r e n t i a l
mean.)
E M E R S O N E L E C T R I C CO.
1 3 2 0 S O U T H M A I N STREET
MANSFIELD, OHIO
l = M I = R S O N
44907
TELEPHONE (419) 7 5 6 - 5 9 1 1
Printed in U.S.A.
60T01B
SPECIAL PURPOSE
Bimetal and Capillary
TEMPERATURE
CONTROLS
The capillary controls are specially designed for over-temperature limit protection in electric baseboard heating, and
similar applications with operating temperatures to 350°F. The capillary, w h i c h
may vary in length from 24 inches to 12
feet, is v a c u u m c h a r g e d with selected
fluids with boiling points from150°F.
through 350°F. at s u b - a t m o s p h e r i c pressure. Responding to temperature change
anywhere along its length, the capillary
actuates a disc type diaphragm. This
d i a p h r a g m snaps t h r o u g h at a predetermined temperature, and operates the
s w i t c h w h i c h may be SPST, S P D T or
manual reset.
This category includes bimetal disc controls w h i c h have been modified to meet
the needs of special environmental cond i t i o n s or m o u n t i n g r e q u i r e m e n t s , a n d
linear limit controls which employ a
c a p i l l a r y t u b e as t h e t h e r m a l s e n s i n g
element.
Some of the special purpose bimetal disc
controls are sealed with epoxy for applications w h e r e moist conditions exist, as
in r e f r i g e r a t o r d e f r o s t i n g . One has an
internal heater which provides anticipating h e a t to the d i s c . A n o t h e r is m a d e
w i t h a c e r a m i c b o d y f o r o p e r a t i o n in
t e m p e r a t u r e s up to 525°F. For r e m o t e
temperature sensing, one control has ext e n d e d terminal straps, while a n o t h e r —
not shown in this bulletin—uses a special
heat collector. All of them are examples
of d e p e n d a b l e T h e r m - O - D i s c t e m p e r a ture controls w h i c h have been developed
to meet the special problems of volume
p r o d u c t i o n applications.
REPRESENTATIVE
SERIES
DESCRIPTION
TYPICAL
APPLICATIONS
ELECTRICAL
Inductive Amperes
F u l l Load
Locked Rotor
RATINGS
Resistive
Volts
Amperes
AC
10H
11H
Capillary l i n e a r l i m i t . A u t o m a t i c and manual
reset. SPST and SPDT.
Electric
Systems.
Heating
_
_
25.0
25.0
120/240
277
14T
1 " disc sealed c o n t r o l . SPST and SPDT. Narrow d i f f e r e n t i a l . C a l i b r a t i o n b e t w e e n — 1 0 ° F .
to 220°F. Heavy d u t y . C o m m e r c i a l .
R e f r i g e r a t o r s and Freezers. Air C o n d i t i o n i n g
and V e n t i l a t i n g E q u i p m e n t . Heating-Cooling (fan
coil) Systems. Hot L i q u i d and Food Dispensing.
16.0
10.0
72.0
45.0
25.0
25.0
120
240
60T01B
% " disc c o n t r o l m o u n t e d on a board w i t h
t e r m i n a l s t r a p s for e x t e n d i n g sensing element into air stream.
L i m i t Control
Systems.
Heating
10.0
5.0
60.0
30.0
25.0
25.0
21.6
12.5
120
240
277
480
29T
1 " disc w i t h i n t e r n a l a n t i c i p a t i n g heater for
r e m o t e or close t e m p e r a t u r e c o n t r o l . Narrow
d i f f e r e n t i a l . SPST and SPDT.
Fan C o n t r o l w i t h T i m e d " O n " , Thermal " O f f " .
Clothes Dryer Variable T e m p e r a t u r e Control.
Thermal Relay.
16.0
10.0
72.0
45.0
25.0
25.0
120
240
30T
y 2 " disc s m a l l c a p a c i t y t e m p e r a t u r e indic a t o r . Grounded case w i t h s i n g l e t e r m i n a l .
Engine W a r n i n g L i g h t
-
-
1.0
1.0
37T
% " disc sealed c o n t r o l . SPST and SPDT.
T e m p e r a t u r e L i m i t i n g Control for R e f r i g e r a t i o n
Defrost Termination.
_
-
10.0
5.0
120
240
JC
5/8" d i s c
525°F.
C o r n P o p p e r s and O t h e r
Applications.
-
-
6.0
3.0
120
240
high temperature
control
up
to
Baseboard
and
Central
f o r Central and Room
Indicator.
High
Temperature
12VDC
12VDC
60T SER
CONTROLS
Operating Temperatures
up to 350°F.
Snap Action Contacts
Factory Preset to your
Temperature
Specifications
Non-Adjustable
Automatic and
ManuaLReset*
SPST (Single P o l e Single Throw)
SPDT (Single pole—
Double throw)
U.L. and CSA
Recognized
High Electrical Capacity
Long Life—Proven
Reliability
* F o r Low S i l h o u e t t e M a n u a l R e s e t
refer to Bulletin 41T.
FEATURES
Principle
of
Operation:
3
Thermal Sensing E l e m e n t — A - i n c h d i ameter bimetal disc w h i c h snaps t h r o u g h
at the c a l i b r a t e d temperature.
C o n t a c t O p e r a t i o n — P o s i t i v e snap c o n tact action is provided by the t h r o w of
the bimetal disc.
Sensitivity:
The temperature-sensitive bimetal disc
may be either e n c l o s e d for protection, or
exposed for greater sensitivity. T h e selection is d e p e n d e n t upon thermal and
e n v i r o n m e n t a l ( m o i s t u r e , d u s t or lint)
considerations.
Flexibility:
Air Stream M o u n t i n g — T h e t e m p e r a t u r e sensitive bimetal disc extends beyond
the mounting surface into the air stream.
Surface M o u n t i n g — T h e bimetal disc is
l o c a t e d for s e n s i t i v i t y a g a i n s t a ffat
surface.
T e r m i n a l A r r a n g e m e n t s — S c r e w or blade
terminals in various configurations.
Terminal and M o u n t i n g R e l a t i o n s h i p —
S w i t c h and terminal h o u s i n g may be rotated in m o u n t i n g flange by 45° angular
i n c r e m e n t s to provide additional electrical clearances w h e n needed.
Contact A c t i o n — E i t h e r open (cut out) or
close (cut in) on temperature rise. Also
available with manual reset feature.
The contacts of the 60T Series manual reset separate on t e m p e r a t u r e rise at a pre-
determined fixed temperature and stay
open. Only after the bimetal disc cools
down to its a p p r o x i m a t e original position
can the contacts be reclosed by depressing the manual reset button. Contact
action is " t r i p - f r e e " f r o m the manual
reset button. Holding the reset button in
a continuous reset position will cause the
control to operate as an automatic reset
limit control.
The basic difference between the 60T
Series and the low silhouette 41T Series
manual reset is the overall height and the
disc cup extension. The 60T disc cup
extends farther into the air stream. Refer
to Bulletin 41T.
Quality:
Life and P e r f o r m a n c e — T h e "free d i s c "
p r i n c i p l e p i o n e e r e d by Therm-O-Disc Research assures long c o n t a c t life and
c a l i b r a t i o n stability. Resistant to n o r m a l
vibrations. No radio or TV interference.
Proven Dependability.
Inspection—100°/o operation
checked
in
a d d i t i o n to Quality C o n t r o l Analysis.
APPLICATIONS
Over-temperature
Limit
Protection
Temperature Controlling
Regulating
Automatic Fan Control
Clothes Dryers
C o m b i n a t i o n Washers-Dryers
Room, Unit and Space Heaters
Central Heating Furnaces
Electric H e a t i n g — P o r t a b l e & Built-in
Air C o n d i t i o n i n g and Ventilating
Equipment
Portable A p p l i a n c e s
Hot Liquid and Food Dispensing
Machines
A i r c r a f t and M i s c e l l a n e o u s Devices
ELECTRICAL RATINGS
U. L. and CSA Recognized
Maximum Temperature
350°F.
Contact
Arrangement
Terminals
1 & 3
SPST or
SPDT
Inductive
Amperes
Full
Load
Locked
Rotor
Resistive Volts
Amperes
AC
100,000
10
60
25
120
100,000
5
30
25
240
—
21.6
277
12.5
480
100,000
—
100,000
120
100,000
125 VA
Pilot
Duty
—
240
277
480
Terminals
1 & 2
SPDT
and
C y c l e s of
Endurance
6,000
5.8
34.8
10
120
6,000
2.9
17.4
10
240
—
240
100,000
Additional
Electric
CSA
Heat
125 V A
Pilot
Duty
120
277
Ratings:
a. Resistive: 10.0 amperes at 600 VAC.
b. Pilot Duty: 400 volt amperes at 600
VAC. Consult f a c t o r y for ratings at
other voltages.
continued
on next
page.
S . P S.T. A I R
STREAM
MOUNTING
S . P. S.T. S U R F A C E
S.P.D.T.
MOUNTING
AIR
fREA^,
MOUNTING
64
8-32 NC-2 TERMINAL SCREWS
S H I P P E D IN BULK
o
0
1
59
64
EX POSED
M-
57
"64
e
21 J
64 t
1
I
!
"">
1 J!
DISC
AUTOMATIC RESET
Figure 1
continued
from
page
o
DISC
\ f
o
I
o
5
i
64
EXPOSED
DISC
ENCLOSED
DISC
51
64
15
I6
ENCLOSED
1
1
64
DISC
AUTOMATIC RESET
Figure 3
AUTOMATIC RESET
Figure 2
one.
For d i r e c t c u r r e n t ratings, c o n s u l t f a c t o r y .
For m i l l i v o l t c i r c u i t s , c o n s u l t f a c t o r y .
T h e 60T S e r i e s has b e e n t e s t e d a n d is
r e c o g n i z e d b y U. L. a n d C S A f o r e l e c t r i c
heating — b a s e b o a r d and duct heaters.
T h e 6 0 T X S e r i e s is a v a i l a b l e w i t h
creased electrical spacings when
q u i r e d for s p e c i a l a p p l i c a t i o n s .
inre-
NOMENCLATURE
60T (1st and 2nd suffix
1st S u f f i x
ment:
o
15
16
EXPOSED
DISC
«| H
1
b
TU~rV
57
16
J
ENCLOSED
- BLADE
TERMINALS
Indicates
Mounting
CALIBRATION TEMPERATURES,
DIFFERENTIALS AND TOLERANCES
Automatic
Reset Design. T o p t e m p e r a t u r e s e t t i n g s , mean d i f f e r e n t i a l s , a n d m a n u f a c t u r i n g t o l e r a n c e s listed b e l o w are c o n s i d e r e d s t a n d a r d f o r the a u t o m a t i c reset
d e s i g n . D i f f e r e n t i a l is the d i f f e r e n c e b e t w e e n t h e o p e n a n d c l o s e t e m p e r a t u r e s . T h e
w i d e r the d i f f e r e n t i a l , t h e l o w e r t h e c o s t .
Example:
A thermostat calibrated
c l o s e 120 ± 8 ° F . ( b o t t o m reset) has
c a l i b r a t e d t o o p e n 160 ± 5 ° F . a n d
C o n s u l t f a c t o r y f o r any o t h e r s p e c i a l
t o o p e n 160 ± 5 ° F . (top t e m p e r a t u r e setting) a n d
a 4 0 ° F . m e a n d i f f e r e n t i a l a n d c o s t s less t h a n o n e
c l o s e 150 ± 5 C F. w i t h a 10°F. m e a n d i f f e r e n t i a l .
considerations.
numbers)
Arrange-
T o p T e m p e r a t u r e Setting
Between (°F.)
M e a n D i f f e r e n t i a l ( B e t w e e n Top
0 t o 79
10 t o 14
S e t t i n g & Bottom R e s e t ) ( ° F . )
Manufacturing Tolerances
Open (°F.)
Close ( ° F . )
±5
±5
1 —Air Stream Mounting
15 t o 19
±5
±5
20 to 29
±5
±6
2—Surface Mounting
30 t o 39
±5
±7
40
±5
±8
10 t o 14
±5
±5
15 t o 19
±5
±5
20 t o 29
±5
±5
30 t o 39
±5
±6
40
±5
±8
15 t o 19»
±5
±6
20 to 29
±5
±6
30 t o 39
±5
±7
40
±6
0 — N o Flange
8 — % " Disc C u p E x t e n s i o n
80 t o 200
2 n d S u f f i x I n d i c a t e s C o n t a c t (or s w i t c h ing) A r r a n g e m e n t :
1—Normally-closed contacts — cont a c t s o p e n o n t e m p e r a t u r e rise.
2 — Normally-open contacts — contacts
c l o s e o n t e m p e r a t u r e rise.
2 0 1 t o 250
3 — S P D T — s i n g l e pole, d o u b l e t h r o w .
4 — M a n u a l Reset.
Example:
60T11 = 60T thermostat for
air s t r e a m m o u n t i n g w i t h n o r m a l l y - c l o s e d
c o n t a c t s o p e n i n g o n t e m p e r a t u r e rise.
251 t o 300
301 t o 350
30 t o 39
±8
40 t o 50
±6
±7
±10
30 t o 39
±7
±10
40 t o 60
±8
±12
* A t t h i s m e a n d i f f e r e n t a l , t h e m a x i m u m t o p t e m p e r a t u r e s e t t i n g is 2 2 0 ° F .
M
M
S.P.O.T.
SURFACE
S.PD.T.
MOUNTING
AIR
STREAM
MOUNTING
-
U-
-2.21
S. P. S.T. S U R F A C E
MOUI* T I N G
2.00
M
8-32 NC-2 TERMINAL SCREWS
S H I P P E D IN BULK
PUSH T O
RESET
1 BLADE
TERMINALS
EXPOSED DISC
.06
ENCLOSED
@
ENCLOSED DISC
ENCLOSED DISC
MANUAL RESET
Figure 5
MANUAL RESET
DISC
AUTOMATIC RESET
Figure 4
Manual Reset Design.
T o p t e m p e r a t u r e s e t t i n g s , mean b i m e t a l d i s c d i f f e r e n t i a l s ,
a n d m a n u f a c t u r i n g t o l e r a n c e s b e l o w are c o n s i d e r e d s t a n d a r d f o r t h e m a n u a l reset d e s i g n .
Figure 6
6. Switch
Housing
and
Terminal
Arrangement:
a. S t a n d a r d — t e r m i n a l s 90° f r o m
Top T e m p e r a t u r e Setting
Between (°F.)
Mean Differential Between
Manufacturing
O p e n and B i m e t a l D i s c R e s e t ( ° F . )
T o l e r a n c e — O p e n (r'F.)
0 t o 125
126 t o 200
35 ( m i n i m u m )
±5
40 t o 80
±5
25 ( m i n i m u m )
±5
30 t o 39
±5
40 t o 80
±5
201 t o 300
45 ( m i n i m u m ) t o 90
±6
301 t o 350
50 ( m i n i m u m ) t o 90
±8
SAMPLES AND
QUOTATIONS
2.
Complete information on the application
is v e r y i m p o r t a n t f o r f u r n i s h i n g o p e r a t ing s a m p l e s a n d f o r q u o t i n g p u r p o s e s .
Please fill in the e s s e n t i a l f a c t s , t h e n m a i l
t h i s f o r m or a c o p y to T h e r m - O - D i s c at
the a d d r e s s s h o w n on t h e n e x t p a g e .
1. Load:
AC • ,
Amperage
Amperage
ing h o l e s c e n t e r line.
c. N o n - s t a n d a r d t e r m i n a l
:
b. C l o s e
°F. T e m p e r a t u r e
F. T e m p e r a t u r e
Mounting:
b. S u r f a c e
4. Switch
Action:
b. M a n u a l Reset
•
•
, Voltage
7. Bimetal
Disc:
a. E x p o s e d
b. E n c l o s e d
Inductive
Inductive
arrange-
m e n t • . (Please d e s c r i b e )
a. A i r s t r e a m
DC
, Voltage
•,
, from mount-
Calibration:
a. A u t o m a t i c Reset
b. S P D T — C o n t a c t s # 1 a n d # 2
R e s i s t i v e EH
Counterclockwise
a. O p e n
3. Type of
a. S P S T — C o n t a c t s # 1 a n d # 3
Resistive • ,
m o u n t i n g h o l e s c e n t e r line
b. R o t a t e d 45° — C l o c k w i s e
5.
Terminals:
a. S c r e w • ,
Blade
b. F o r m e d — 30° ( s t a n d a r d )
9 0 ° • , o r horiz.
8. Disc Cup
Extension:
a. S t a n d a r d (Fig. 1 t h r o u g h 6)
b. % " E x t e n s i o n (Fig. 7)
•
continued
on next
page
S.P.S.T. A I R S T R E A M
MOUNTING
W I T H 3/4 I N C H DISC C U P E X T E N S I O N
NON-STANDARD TERMINAL
ARRANGEMENT
S . R S . T . ONLY
2.00
RIGHT T E R M I N A L
POINTS
CLOCKWISE. LEFT TERMINAL
POINTS COUNTER C L O C K W I S E .
j r BLADE
* TERMINALS
ENCLOSED DISC
DOUBLE
9. Life
45°C0UN T E R CLOCK W I S E
Figure 8
13.
cycles.
Requirement
TERMINAL
ON ONE S I D E
AUTOMATIC RESET
Figure 7
Figure 9
Environment:
14. Appliance
a. S p e c i f y if o t h e r t h a n c l e a n , d r y air
(dirt, dust, lint o r m o i s t u r e c o n d i 10. Maximum
mostat
temperature
to which
ther-
will be subjected
11. Estimate
of yearly
ments.
12. Production
one time
tions) :
or
a. E l e c t r i c _ ,
Application:
Gas • ,
Oil
b. P u r p o s e of T h e r m o s t a t a n d A p p l i cation Description:
°F.
quantity
requireper
quantity
45° C L O C K W I S E
to be ordered
year.
at
.
THERM-O-DISC,
INCORPORATED
P l a n t s in M a n s f i e l d , O h i o a n d St. T h o m a s , O n t a r i o
I
B u l l e t i n 60T/0170
A S U B S I D I A R Y OF
E M E R S O N ELECTRIC CO.
1 3 2 0 S O U T H M A I N STREET
MANSFIELD, OHIO 4 4 9 0 7
l=MI=R5DN T E L E P H O N E ( 4 1 9 ) 7 5 6 - 5 9 1 1
Printed in U.S.A.