with Sensor Redundancy
Data sheet
126 Bailey Road
North Haven, CT 06473
Phone 203-680-9401
Fax 203-680-9403
Carlin Combustion Technology
T
ech
support
800-989-2275
carlincombustion.com
©
Copyright 2021 – Carlin Combustion Technology
Specifications
• Carlin’s Model 90320 microprocessor-operated, multiple-contact tem-
perature limit controls are available as described below. The model
provides two contacts — one for operating limit and one for high limit.
• Refer to separate product listing sheets for pre-defined models, or re-
quest a control to meet your specifications, within the available ranges
listed below.
90320
B
Dual limit temperature control
• operating and high limit action
• smart manual reset on high limit
• operating limit sensors, redundant
• high limit sensor
• operating and limit contacts in series
Control model
B
Control power input
(red-white wire)
240
VAC
, 50/60 hz, 12
VA
Contacts
2 in series
Contact rating
Motor load
General
240
VAC
, 50/60 hz, 1
HP
120/240
VAC
, 50/60 hz, 15
AMPS
Wires
Quantity
3
240
VAC
Hot / Neutral
red-white / white
Limits OUT
black
Adjustable oper. limit range
Any range between 50°F to 240°F
Fixed high limit temperature
Any value from 160°F to 240°F
Fixed differential (subtractive)
Any value from 5°F to 100°F
Operating temperature limits
+32°F to +140°F
Storage temperature limits
–40°F to +185°F
Agencies
—
m
Multiple sensor option (3)
(Using individual and/or dual sensor assemblies)
m
Sensor Redundancy
(Higher temperature of two operating sensors used)
m
Easy remote sense
(Electronic sensors, wired to control)
m
Smart manual reset
(Manual reset only if operating limit doesn’t open)
m
Serviceman reset protection
(Latch-up after three consecutive lockouts
(1)
)
m
Power-independent lockout
(Power cycling won’t reset from lockout or latch-up)
m
Diagnostic LED’s
(Call for heat, and lockout/latchup)
m
SMC
Technology
(2)
(1) Latch-up mode shuts down the control after three consecutive lockouts, and requires a
special procedure to reset. This ensures the owner will call in a licensed technician to
troubleshoot and correct burner problems.
(2) The 90320 provides two limit relays. Carlin’s patented SMC technology (Safety Monitoring
Circuit) monitors the contacts of both relays.
Lockout
occurs if a limit relay contact is found
closed when it should be open.
