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Form
No.
7515004-001
Rev.
B
ETC
TWO
STAGE
ELECTRONIC
TEMPERATURE
CONTROL
PRODUCT
DESCRIPTION
RELAY
ELECTRICAL
RATINGS
120v
2081240V
The
Ranco
ETC
is
a
microprocessor-based
family
NO
Contact
of electronic
temperature
controls, designed
to
Full-load
amps
9.8
A
4.9
A
provideonloff
control
for
commercial
heating,
cool-
Locked
rotor
amps
58.8
A
29.4
A
ing,
air
conditioning
and
refrigeration.
The
ETC
is
Resistive
amps
9.8
A
4.9
A
equipped
with
a
liquid
crystal
display
(LCD)
that
Horsepower
112
hp
112
hp
provides
a
constant
readout
of
the
sensed
tem-
perature,
and
a
touch
keypad
that
allows
the
user
NC
Contact
to
easily
and
accurately
select
the
set
point
tem-
Full-load
amps
5.8
A
2.9
A
perature,
differential
and
heating/cooling
mode
of
Locked
rotor
amps
34.8
A
17.4
A
the
operation.
Models
are available
that
operate
Resistive
amps
5.8
A
2.9
A
on
either
line
voltage
Horsepower
114
hp
114
hp
(12012081240
VAC)
or
low
voltage
(24VAC).
ilot
Duty:
125
VA
at
12012081240
VAC
C
-
APPLICATIONS
With
its
wide
temperature
setpoint range and selectable
heating or cooling modes, the
FTC can be used for a wide variety of
Control
Ambient
Temperature
Operating
-20°F
to
140T(%!VRht&~°C)
Storage
-40°F
to
176°F
(-40°C
to
80°C)
Ambient
Humidity
0
to
95%,
RH,
Non-condensing
0
to
10
V
Output
Impedance
1
K
-
Enclosure
NEMA
1.
Plastic
I -
-
-
applications
including
multiple
Agency
Approvals
UL
Listed,
File
E94419,
Guide
XAPX
compressor
control,
two
stage
heating,
CSA
Certified,
File
LR68340,
Class
4813
02
ventilation
control,
automatic
c
h
a
q
w
ETC
ORDERNG
I N F O R M A T
-
--
space
and
return
air
temperature
control,
water
cooled
condensers
and
control
with
alarm
funtion.
FEATURES
r
Wide
setpoint
temperature
range
(-30°F
to
220°F)
and
differential
adjustment
(1°F
to
30°F).
r
Simple
keypad
programming
of
setpoint
temperature,
differential
and
coolingheating
modes.
r
Two
individually
programmable
stages
for
heating
andlor
cooling.
r
LCD
readout
of
sensor
temperature,
control
settings,
relay
status
and
onboard
diagnostics.
Remote
temperature
sensing
up
to
400
feet.
r
Two
SPDT
output
relays.
r
User-selectable
FahrenheitICelsius
scales.
r
Lockout
switch
to
prevent
tampering
by
unauthorized
personnel.
r
Choice
of
line
voltage
and
low
voltage
models
available.
r
Optional
0
to
10
volt
analog
output
available
for
remote
temperature
indication.
SPECIFICATIONS
Input
Voltage
120
or
2081240
VAC
(24
VAC
optional),
50160
Hz
Temperature
Range
-30°F
to
220°F
Input
No.
of
0 - 1 0 V
Code
Number
Voltage
Stages
Output
ETC-211000-000
1201240
2
NO
ETC-211100-000
1201240
2
Yes
ETC-212000-000
24
2
NO
ETC-212100-000
24
2
Yes
OPE
RATION
Liquid
Crystal
Display
(LCD)
The
LCD
display
provides
a
constant
readout
of
the
sensor
temperature
and
indicates
if
either
of
the
two
output
relays
is
energized.
When
the
S1
annunciator
is
constantly
illuminated
during
operation,
the
Stage
1
relay
is
energized.
Likewise,
when
the
S2
annunciator
is
constantly
illuminated
during
operation,
the
Stage
2
relay
is
energized.
The
display
is
also
used
in
conjunction
with
the
keypad
to
allow
the
user
to
adjust
the
setpoint
temperatures,
differentials
and
heatinglcooling
modes
for
each
stage.
Control
Setup
The
temperature
setpoint
refers
to
the
temperature
at
which
the
normally
open
(NO)
contacts
of
the
output
relay
will
open.
Determine
the
loads
to
be
controlled
and
the
operating
modes
required
for
each
stage, cooling
or
heating.
@When
the
cooling
mode
is
chosen,
the
differential
is
above
the
setpoint.
The
relay
will
de-energize
as
the
temperature
falls
to
the
setpoint.
-
Differential Range
1
O F
to
30°F
SPDT
*When
the
heating
mode
is
chosen,
the
differential
is
below
the
setpoint.
Switch
Action
relay
will
de-energize
as
the
temperature
rises
to
the
setpoint.
Sensor
Thermistor,
1.94
in.
long
x
0.25
in.
dia
8
ft.
cable
The
ETC
two
stage
control
can be
set
up
for
two
stages
of
heating,
two
stages
Power
Consumption
12012081240
VAC
:
100
milliamps
of
cooling
or
one
stage
cooling
plus
one stage
heating.
Refer
to
Figures
1,2
24
VAC
:
2-6
VAC
and
3
for
a
visual
representations of
different
control
setups.
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