Johnson Controls 270XT Serie Manual De Instrucciones

PSC9626
I
ntroduction
These controls are designed for protection
against freeze-up of hydronic heating coils,
cooling coils and similar application.
D
escription
Sensing element is 3 or 6 meters long to permit
attaching across the surface of a coil to guard
against freezing at any point. When any 30 cm
or more of this element senses a temperature
as low as the control setpoint, it will "switch off".
A special version is available with bulb and 2 m
capillary, range -24/+18°C for clamp-on or
immersion purposes.
SPDT change over contacts permit the use of an
alarm signal.
N
ote
These controls are designed for use only
as operating controls. Where an operating
control failure would result in personal injury
or loss of property it is the responsibility of
the installer to add devices or systems that
protect against, or warn of, control failure.
Dust tight Pennswitch
SPDT contacts
270XTAN provided with trip-
free manual reset
Controls have adjustable range
© 2003 Johnson Controls Inc.
Order No. PD-270XT-E
Series 270XT
Freeze Protection Thermostats
Feature and Benefits
Prevent pollution of the contacts by
electrostatic influences
Change-over contacts permits the use of an
alarm signal
Safety lock-out, override is not possible in
the control function
Suitable for several applications
European Refrigeration Controls Catalogue
270XT-95008
(with 6 m 'wrap-around' capillary)
Catalog Section 1
Product Bulletin 270XT
Issue 03/03/2003
Catalogue Section 1