Warning while installing UB7 thermostat
Installing in heating elements of Hair Dryers

Market share of UB7 thermostat for Hair Dryer is more than 50% worldwide. Volume of UB7
supplied is No.1 in the world. UB7 thermostat has been produced for more than 30 years.
Actually UB7 is technically matured, most reliable and high quality thermostat for HairDryer. However, if it is installed in wrong manner (marked in X), it might not function mostproperly or it might cause trouble like ﬁre accident because of malfunction of UB7 very
The book introducing
UB7 and UCHIYA

unfortunately. Therefore, we would request to our user to install UB7 in very correctmanner (marked in ○) in this leaﬂet.

Name of each part of UB7③Stopper①Bimetal element

Plan view②Movable contact arm

Oval holeRound hole

④Terminal 1④Terminal 2(Hook)“A” view angle

Side view

Movable contact
Base - Phenol resin

Stationary contact①Bimetal element

heat sensing element which makes snap action when ambient air reaches at aimed＊Temperature to open or close contacts has been set in advance by way of designedforming of the bimetal element, therefore the temperature may change if externalpressure is applied to the bimetal element.

②Movable contact arm

Conductive metal plate spring which operates Movable contact open and close＊It's designed to have contact pressure heavier than 98mN(10gf) on Stationary contact. It
might decrease contact pressure if external pressure is applied to Movable contact arm
or if Movable contact arm is opened by force. It will cause malfunctioning of switch (socalled as"chattering").

③Stopper

Stopper at both sides of Bimetal element to prevent
dropout＊If external pressure is applied to Stopper and/or Hook,it might cause abnormal switching or even Bimetalelement dropping out. (Please see the picture on theright.)④Terminal 1& 2

Inclined Stopper because of external pressure“A” view angle

It's current carrying. Each terminal has Contact and Hole to connect. Usually it'sconnected by using eyelet.
＊Because it's current carrying, please keep it's surface clean enough always. Please makeconnection ﬁrmly secured not to loose. Abnormal heat emission at connecting area
might cause earlier switching oﬀ at lower temperature than expected.

How to take out thermostat

When you install thermostat,please pick it up from container
tray carefully.

How to hold thermostat

If you put thermostats on
workbench randomly, contacts
and terminals might get stuckeach other. Such conditions may
decrease contact pressure or keep
contacts open always.
If contacts keep open, it will result
Please don't use thermostat
in non-energizing ﬁnal
which was dropped down
application.
to ﬂoor.

Make sure your f ingers are covered by f ingerstall.
Then hold thermostat by terminal or base.

Please don't touch Contacts, Bimetal element,Stopper and Movable contact arm.

How to connect thermostat using eyelet
Round hole＊should be caulked ﬁrst

Oval hole

STEP 1: At ﬁrst, put Eyelet through Round hole and caulk it.
STEP 2: Then, do the next Eyelet caulking through Oval hole.

Very bad to pinch
Mica board betweenContacts

note: If STEP 1 and STEP 2 are reversed, it generate stress to phenol Base and it might break the Base.

Please don't use any thermostat which experienced phenomenon
markedin this leaflet.
Further information, write or call;

UCHIYA THERMOSTAT CO.,LTD.
2-176-1 TAKASU, MISATO-SHI,
341-0037, JAPANE-mail: sales@uchiya.co.jp
URL: http://www.uchiya.co.jp
TEL:(+81)-48-955-4181
FAX:(+81)-48-956-1310