Ranco O10 Instruction Sheet

DESCRIPTION/APPLICATION
RANCO commercial temperature controls are used in
commercial refrigeration, air conditioning, heating and
ventilating applications. Their sensing elements contain
a refrigerant charge which develops pressure relative to
the temperature being sensed. This pressure operates
the switch located within the control.
These controls, with NEMA I enclosures and snap action
switches are used in a variety of applications: direct con-
trol of motors, compressors, fans, heating equipment, etc.;
pilot duty control of a contactor; control of solenoid valves.
The electrical ratings shown inside the control cover must
not be exceeded.
O10 Single pole, single throw (SPST)
close (cut-in) on rise
open (cut-out) on drop
INSTRUCTION SHEET
Bulletin No. 1515093
O10/O16/O20/O60 Commercial
Temperature Controls
DIFFERENTIAL
ADJUSTMENT SCREW
CW increases
CCW decreases
See p.3
RANGE
ADJUSTMENT
SCREW
CW lowers
CCW raises
See p. 3
COVER
SCREW
O16 & O60 Single pole, double throw (SPOT)
2-3 close on rise; open on drop
2
2-1 close on drop; open on rise
020 Double pole, single throw (DPST)
close (cut-in) on rise
open (cut-out) on drop.
L c-—J_c T
All O series are available in the automatic reset/cycling
version. Manual reset versions of the O16 are available.
INSTALLATION
CAUTION:
To prevent possible electrical shock or equipment
damage, disconnect electrical power to unit before and
during installation. DO NOT restore electrical power
to unit until the control is properly installed and
grounded. DO NOT locate the control in an explosive
atmosphere as a safety hazard can result due to pos-
sible spark generation in the control.
Controls are not to be located in areas of extreme mois-
ture, dirt or dust, or in a corrosive or explosive atmosphere.
These environments can shorten control life.
NOI
YESt
IMPORTANT NOTICE
MANUAL OPERATION (tripping switch)
If the switch is open (terminals 2-3 on Ol 6 &O60) it
can be manually closed by lifting the bellows tab as
shown.
Operating the control at any other point WILL
CAUSE CONTROL DAMAGE AND VOID THE
WARRANTY.
DO NOT REMOVE the protective switch cover.