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Ranco
provides a broad offering of electro-mechanical and electronic temperature
controls that are designed to switch electrical loads such as contactors,
relays, fans, and motors in HVAC and Commercial applications in
response to changes in sensed temperature.
APPLICATIONS
- Room Air Conditioners (cool-only or
heat/cool units).
- Packaged terminal air conditioners (PTAC)
and heat pumps (PTHP).
- Heat Pumps and unitary air conditioners -
outdoor ambient sensed for enabling auxiliary heaters and
compressors lockout.
- Ice Machines.
- Reach-In Refrigerator/Freezers.
- Walk-In Refrigerator/Freezers.
- Beverage Coolers.
- Condensing Units.
- Display Cases.
- Commercial Cooking Equipment.
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C12/C17
Controls
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A22/A30
Controls |
- Fixed or adjustable temperature settings.
- Laser welded stainless steel sensing
elements.
- Narrower differentials attainable.
- C12 can be used for cool only units or
heat/cool units when used with a separate changeover switch.
- C17 has two SPDT electrically isolated switches, calibrated
at different set points and differentials. By using various wiring
schemes, the C17 can provide a variety of control functions such
as ON/OFF control, and manual or automatic changeover between
compressors and strip heaters, or shifting of reversing valve
for heat pumps.
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- Fixed or adjustable temperature settings.
- Laser welded stainless steel sensing
elements.
- Constant ON or OFF positions available.
- A wide variety of mounting brackets, adjustment ranges, and
shaft styles available.
- Standard 1/4" quick-connect terminals with optional screw
terminals.
- A22 can be used as a heat/cool thermostat
by using a separate changeover switch.
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G1/G4
Controls
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O
Controls |
- Wide variety of temperature ranges and differentials for commercial
heating applications.
- Available in both SPST and DPST switch
configurations.
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- Maximum adjustment accuracy with 7 revolution range adjustment
screws.
- NEMA 1 enclosure with non-conductive cover.
- Front-located captive cover screw.
- Universal Mounting and compact design.
- Laser-welded bellows for extended life.
- Constant cut-in setting.
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ELECTRONICS
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ETC
Controls
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- Wide temperature range (-30 F to 220 F).
- Adjustable differential range (1 F to 30 F).
- LCD Digital Display.
- Temperature at the sensor.
- Control settings.
- Relay status.
- Onboard diagnostics.
- Simple Key Pad settings.
- Remote temperature sensing - up to 400 feet.
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- Selectable Heat or Cool modes.
- Selectable Fahrenheit or Celsius modes.
- One Horsepower output relay.
- Concealed lockout switch to prevent tampering.
- Both one and two stage models available.
- O-10 VDC analog output available.
- Settings retained in the event of a power failure.
- Sensor included with control.
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TYPICAL
SPECIFICATIONS
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Control Type |
Switch |
Temp. Range °F |
Adj. Range °F |
Differential |
Sensing Element Style1 |
Typical UL/CSA Ratings2 |
|
Min. °F |
Max. °F |
VAC (60Hz) |
FLA |
LRA |
NIA |
PD,VA |
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A22 |
SPDT/ SPST3 |
0 to 100 |
5 to 30 |
4.5 |
25 |
Capillary only or with bulb |
240
240
277
|
20
25
16
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85
100
60
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25
20
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500
500
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A30 |
SPST4 |
0 to 100 |
5 to 30 |
5 |
25 |
Capillary only or with bulb |
208/
240
240
|
25
16
|
100
60
|
16
|
240
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C12 |
SPDT |
50 to 100 |
5 to 35 |
3 |
5 |
Capillary with bulb |
240
277
|
25
16
|
100
60
|
25
20
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C17 |
SPDT (2) |
50 to 100 |
20 to 60 |
3.5 |
5 |
Capillary with bulb |
240
250
277
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25
16
|
100
60
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25
16
|
240
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G1 |
SPST |
50 to 250 |
N/A |
8 Fixed |
Capillary with bulb |
250
277
480
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30
25
15 |
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G4 |
DPST |
50 to 250 |
N/A |
6 Fixed |
Capillary with bulb |
250
277
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25
25
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O |
SPST/ SPDT |
-15/40 0/55 25/75 |
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3 |
20 |
Capillary only or with bulb |
120
240
|
24
24
|
144
144
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24
24
|
720
720
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ETC |
SPDT One Stage SPDT Two Stage |
-30 to 220 |
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1 |
30 |
Sensor with cable |
1206
208/2406
1206
208/2408
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16
8
9.8
4.9
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96
48
58.8
29.4
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15
8
9.8
4.9
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125
125
125
125
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1
A capillary only bellows senses from the coldest exposure point, including
the bellows head.
A capillary with bulb bellows senses from the bulb, regardless of
colder/warmer exposure points. The bulb portion of the A22/A30 capillary
with bulb must be mounted with tip end pointing upward within 65°
of vertical. A22/A30 sensing elements contain a saturated vapor/liquid
refrigerant and are sensitive to barometric pressure changes; consult
factory for correction factors. C12/C17 sensing elements contain a
liquid fill with the majority concentrated in the bulb area for accurate
temperature control in the desired sensing location. The bulb may
be oriented in any position. It is unaffected by barometric pressure
changes, but can be slightly affected by ambient temperature; consult
factory for correction factors.
2UL File SA512/CSA File LR 32079; Confirm ratings with
factory as they vary within control type.
3 SPST version is factory available by trimming off one
terminal (#1 or #3).
4 A30 is available as a close on temperature rise switch
only.
5 Constant cut-in application.
6 N.O. contact rating; N.C. contact rating is less. |
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