Robertshaw Paragon 9145 User Manual
UDT - Universal Defrost Timer
Universal Defrost Timer (UDT)
The Universal Defrost Timer family consists of two models: electric defrost and off-cycle defrost. Both models can
be wired directly to 120V AC, 208V AC or 240V AC power sources. The timers can be used in place of traditional
electromechanical defrost time clocks. Users should review this document, including terminal specifications, to ensure
compatibility with the application.
The timer maintains and displays the current time and each defrost cycle. The user can glance at the display and
immediately determine what time it is as well as see the defrost settings (start time and duration). In
addition, colored LEDs indicate the current system mode (refrigeration or defrost).
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Operation and Functions
The Paragon® Universal Defrost Timer series is designed to accept power supply voltages of 120V AC, 208V AC
or 240V AC directly connected to the power terminals. This is accomplished without the use of jumpers or
switches. It is designed to be as easy to use as similar electromechanical defrost time clocks.
• Dial style clock face
• Current time indicated by flashing segment
• Scheduled defrosts and defrost duration indicated by solid segments
• Simple programming using three buttons and a rotating dial
Features not found on traditional electromechanical defrost time clocks include:
• System status indicators – LED for refrigeration and defrost
• Manual defrost initiation with a single button press
• Terminal G (defrost termination wiring connection) diagnostics
Features / Benefits
Universal Voltage ��������������������������������������������� Directly connect to 120V AC, 208V AC or 240V AC power supply.
Electronic User Interface .................................... Easy-to-read time of day. Simple defrost cycle programming. No
complicated dials and hard-to-use pins.
Program Carryover ............................................. Maintains clock up to 100 hours and program indefinitely in case of
power outage. When power restores, the program detects the current
time and program status and continues as programmed.
Backlit Display..................................................... Easy to see in poorly lighted spaces.
System Status Indicators .................................... Green LED indicates refrigeration. Red LED indicates defrost.
Manual Defrost ................................................... User-initiated 15 minute manual defrost cycle.
Non-Volatile Memory ......................................... The programmed parameters will remain in the memory.
Capacitor Carryover for the Clock ...................... Maintains the correct time-of-day for a minimum of 100 hours.
Microprocessor-Based Electronics ..................... High reliability and repeatability.
Agency Listings:
File number SA512 (9045-00 and 9145-00)
File number SA512 (9045-00M and 9145-00M)
The devices are listed as Refrigeration Controllers.
FCC Compliance*
This device complies with CFR 47, Part 15, Subpart B, Class A.
Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause undesired
operation. Changes or modifications not expressly approved by Robertshaw Controls could void the user’s authority to
operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
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interference, in which case the user will be required to correct the interference at his own expense.
Canadian Compliance*
This Class A digital apparatus meets all of the Industry Canada, ICES-003 requirements (Canadian Interference-Causing
Equipment Regulations).
Cet appareil numerique de la classe A respecte toutes les ezigences du Reglement sur le material brouilleur du Canada.
*NOTE: These compliance statements apply to NEMA 1 enclosed models only� All modular units are the
responsibility of the purchaser to obtain the compliance�
Installation Instructions
IMPORTANT
• All UDT series controls are designed as operating controls only� If an operating control failure could result in
personal injury or loss of property, a separate safety control and/or alarm should be installed�
• The schematic drawings and other information included in these instructions are for the purpose of
illustration and general reference only.
• These instructions do not expand, reduce, modify or alter the Robertshaw Terms in any way. No warranty or
remedy in favor of the customer or any person arises out of these instructions.
• The 9045 and 9145 controls have been certified by Underwriters Laboratories Inc. The certification does not
extend to their use for any other purpose. Robertshaw assumes no responsibility for any
unconventional application of its control unless such application has been approved in writing
by Robertshaw.
• It is the responsibility of the installer and the user to assure that the application and use of Robertshaw products
are in compliance with all federal, state and local requirements, including, without limitation, all requirements
imposed under the National Electric Code and any applicable
building codes.
CAUTION
To prevent possible electric shock or equipment damage,
disconnect electrical power to the unit before and during
installation. DO NOT restore electrical power to the unit until the
control is properly installed and the cover is assembled. DO NOT
locate the control in an explosive atmosphere as a safety hazard
can result due to possible spark generation in the control. Controls
are not to be located in areas of significant moisture, dirt or dust,
or in a corrosive, explosive atmosphere. Using a control in such
environments may result in injury or damage to persons or property
(or both) and are likely to shorten the control life. DO NOT connect
the supply (as shown connected to terminal F in Figures 4 and 6)
directly to any other terminal. DO NOT remove jumpers between
terminals C and D on model 9145 or between terminals B, C and D
on model 9045.
Robertshaw assumes no responsibility for any such use�
Pour prévenir les chocs électriques ou les dommages aux
équipements, couper l’alimentation électrique de l’unité avant
et pendant l’installation. NE PAS ali-menter le thermostat avant
que la commande ne soit correctement installée et le couvercle
assemblé. NE PAS placer le thermostat dans une atmosphère explosive car une étincelle dans le thermostat représente un danger. Les
thermostats ne doivent pas être placés dans des zones très humides,
poussiéreuses ou sales, ou dans une atmosphère corrosive et
explosive. Si le thermostat est utilisé dans de tels environnements,
des préjudices aux personnes ou des dommages aux biens (ou les
deux) peuvent survenir et sont susceptibles de raccourcir la durée
de vie du thermostat. NE PAS brancher l’électricité (comme branché
à la borne F dans les figures 4 et 6) directement à n’importe quelle
autre borne. NE PAS retirer les cavaliers entre les bornes C et D sur le
modèle 9145 ou entre les bornes B, C et D sur le modèle 9045.
Robertshaw n’assume aucune responsabilité pour de telles utilisations�
MISE EN GARDE
Mounting
Mount these controls to a wall or any flat surface using the three holes in the metal case (models
9045-00 and 9145-00). The control’s components are not position sensitive, but should be mounted so they can be
easily wired and adjusted. The models that do not come in a metal case must be mounted inside an enclosure (Nema 1
type or better).
NOTE: The manufacturer recommends removal of the electronic controller prior to mounting the metal
case to a wall or any flat surface to facilitate installation and the installation of conduit fittings and conduit installation.
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NOTE: For models 9045-00M and 9145-00M: Place the peel-and-stick label (3.25” x 7”), over the old label on the inside
cover of the metal enclosure used by the 8100 or 8200 series of products.
Mounting Dimensions – Metal Case
Overall Dimensions
Fig. 1
Fig. 2
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