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COMMERCIAL DEFROST TIMERS
MANUFACTURER COMPARISONS AND HANDS ON LAB
Robertshaw® proprietary and confidential ©2015 1
Why do I need a Paragon Defrost Timer? Manufacturer Comparison Sales Tools Hands On Lab
Mechanical Electrical Program Wiring and Relay information
Q&A
Robertshaw® proprietary and confidential ©2015 2
Manufactured products for the refrigeration industry since 1905
Both mechanical and electronic controls are rated to UL873 commercial refrigeration standards ie. 30,000 cycles
Controls allow for a more precise termination of the defrost cycle based on temperature or pressure value
Controls are often called defrost timers because defrost initiation is based on a time schedule
Easy to install and program especially in retrofit applications
Robertshaw® proprietary and confidential ©2015 3
8145-20
9145-00
8145-AV
Paragon® Intermatic / Grasslin DTAV40 Intermatic/Grasslin G8000 Series
Mechanical Timer Supco Precision Timer Co, Inc.
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Competitive Comparison Paragon® Intermatic Grasslin® Supco®
Family or Part Number 814x-x0 or 804x-x0 G814x-x0 or G804x-x0 S8x4xx0
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Product History+100 Years Quality
ProductsLess than 3 Years, Price Point
ProductLess than 8 years, Me-too
Asian Made Knock-off
Heavy Duty Metal Gears Yes No-Plastic No-Plastic/Steel
Positive Slider Switch Design Assures Positive Electric Contact and Wipes the Contact Surface of Contaminates Yes No No
Heavy duty-Synchronous Enclosed Industrial Type Motor Yes No No
UL Listing UL873 UL873 UL873
Heavy Duty Silver Plated Contacts Yes No No
Switch Ratings @ 240VAC 40 amp 2 HP 240VAC 40 amp 2 HP 240VAC 40 amp 2 HP 240VAC
Warranty 1-Year 2-Year 1-Year
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Paragon® 8000 Series Grasslin® G8000 Series
Enclosed Motor Open Motor
Enclosed Motor reduces risk of damage to the electric motor Reduces contaminants entering the internal workings of the electric motor
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Paragon® 8000 Series Grasslin® G8000 Series
Metal Gears Plastic Gears
Heavy Duty Metal Gear components extends timer life by reducing wear Better gear alignment means better performance
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Paragon® 8000 Series Grasslin® G8000 Series
Heavy Duty Contacts
Paragon Heavy Duty Silver Plated contacts for longer life Properly aligned contacts eliminate arching and shortened life cycles Rated 30,000 cycles, heavy duty positive switch slider bar
Standard Contacts
Grasslin Slider Bar Mechanism
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8145-20M, Mechanical model 120/240V
9145-00M
9045-00M
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Robertshaw® proprietary and confidential ©2015
Feature Paragon® Intermatic Grasslin®
Family or Part Number 8145-AV DTAV40
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Auto Voltage (120, 208, 230V AC)
Yes Yes
UL ListedYes UL60730
Refrigeration ClockYes UL917
Timer Clock
LED Indicator Lights Yes Yes
Real Time Clock Face Yes Yes
Manual Defrost Initiation
Yes No
Switch Ratings 40 Amp, 2 HP, 277V AC 40 Amp, 2 HP, 240V AC
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Value PropositionWholesaler / Distributor
Contractor End-User
Multi-Voltage (120/208-230/277)
UL Listed
Leading Brand
Real Time Clock Face
Manual Defrost Initiation
Captive Tripper Pins
Switch Ratings
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Feature Paragon®IntermaticGrasslin® Supco®
Family or Part Number 9x45-00 (UDT) n/a n/a
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Multi-Voltage (120/208-230) Yes - direct wire to terminals
UL Listed Yes - as a defrost controller. UL873 Temperature Regulating Device.
Requires life test to 30,000 cycles at temperature extremes.
Backlit Yes
Real Time Clock Yes - Electronic
Power loss protection Yes - clock maintained by capacitor for 100 hours of lost power. Schedule
stored in flash memory.
Manual Defrost Initiation Yes - 15 minutes
Intuitive Display Yes - Time and defrost schedule easy to understand
Switch Ratings Defrost Heater - 30 Amps Resistive
Warning of DT failure Yes - see Terminal G error code
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Value PropositionWholesaler / Distributor
Contractor End-User
Multi-Voltage (120/208-230)
UL Listed
Backlight
Real Time Clock
Power loss protection
Manual Defrost Initiation
Intuitive Display
Switch Ratings
Warning of DT failure
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CROSS REFERENCE
SELL SHEETS
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Manufacturer Part Number
ManufacturerUni-Line®
ReplacementDescription
DTAV40 Grasslin 8145-AV Auto Voltage Timer - DPST - 120…277V - 40A - Metal Enclosure, Plastic Dial
DTMV40 Grasslin 8145-AV Auto Voltage Timer - DPST - 120…277V - 40A - Metal Enclosure, Plastic Dial
DTMV40 Grasslin 8145-AV Auto Voltage Timer - DPST - 120…277V - 40A - Metal Enclosure, Plastic Dial
124-1342 Supco 8145-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
M814520 Supco 8145-20M Mechanism Only of Mechanical Timer 8145-20
M814520 Supco 8145-AVM Mechanism Only of Mechanical Auto Voltage Timer 8145-AV
S804100 Supco 8041-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
S804120 Supco 8041-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
S804500 Supco 8045-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
S804520 Supco 8045-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
S814100 Supco 8141-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
S814120 Supco 8141-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
S814500 Supco 8145-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
S814520 Supco 8145-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
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Manufacturer Part Number
ManufacturerUni-Line®
ReplacementDescription
G8045-00 Grasslin 8045-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
G8045-20 Grasslin 8045-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
G8145-00 Grasslin 8145-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
8145-20 Grasslin 8145-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
6045-00 Precision 8045-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
6045-20 Precision 8045-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
6145-00 Precision 8145-00 Mechanical Timer - DPST - 120V - 40A - Metal Enclosure, Metal Dial
6145-20 Precision 8145-20 Mechanical Timer - DPST – 208/240V - 40A - Metal Enclosure, Metal Dial
8145-20 Robertshaw 8145-AV Auto Voltage Timer - DPST - 120…277V - 40A - Metal Enclosure, Plastic Dial
8145-20 Robertshaw 9045-00 Electronic Timer – DPST – 120/208/240 - 30A - Metal Enclosure, Digital
8145-20 Robertshaw 9145-00 Electronic Timer – DPST – 120/208/240 - 30A - Metal Enclosure, Digital
8145-20M Robertshaw 8145-AVM Mechanism Only for Mechanical Timers
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Manufacturer Part Number Manufacturer Uni-Line® Replacement Description
CC616 GEMLINE 8145-20M Exact
CC81452 GEMLINE 8145-20M Functional
DT140ST-240 GRASSLIN 8145-20M Functional
03S072 HUSSMAN 8145-20M Functional
4480482 HUSSMAN 8145-20M Functional
G8145-20 INTERMATIC 8145-20M Exact
3805 INTERNATIONAL COLD 8145-20M Functional
D81-8145-20 PARAGON 8145-20M Exact
16987 PARAGON 8145-20M Functional
3106-3 PARAGON 8145-20M Functional
5106 PARAGON 8145-20M Functional
5527-Z PARAGON 8145-20M Functional
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Manufacturer Part Number Manufacturer Uni-Line® Replacement Description
5719-G PARAGON 8145-20M Functional
5X459 K357-20 PARAGON 8145-20M Functional
6145-20 PARAGON 8145-20M Functional
7075401 PARAGON 8145-20M Functional
7075407 PARAGON 8145-20M Functional
7075407 8145-20B PARAGON 8145-20M Functional
8106-3 PARAGON 8145-20M Functional
8145-20B PARAGON 8145-20M Functional
8145-20M PARAGON 8145-20M Functional
A357-20 PARAGON 8145-20M Functional
EL516A FOGEL PARAGON 8145-20M Functional
G357-20 PARAGON 8145-20M Functional
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Manufacturer Part Number Manufacturer Uni-Line® Replacement Description
J357-20 PARAGON 8145-20M Functional
K357-20 PARAGON 8145-20M Functional
P990 PARAGON 8145-20M Functional
R3106-3 PARAGON 8145-20M Functional
TD681-3 PARAGON 8145-20M Functional
TD961-3 PARAGON 8145-20M Functional
TS306 PARAGON 8145-20M Functional
Q81-452 QUALITY ENGIN. SYS. 8145-20M Exact
ELTMR0603 RANDELL 8145-20M Functional
S814520 SUPCO 8145-20M Exact
324-12768-00 TRAULSEN 8145-20M Functional
12410 UNI-LINE 8145-20M Exact
66201312410 UNI-LINE 8145-20M Functional
7008-105 UNI-LINE 8145-20M Exact
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Order 150-2230 Order 150-1893
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8000 Series Mechanical Timers 9000 Series Electronic Timers
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MECHANICAL INSTALLATION
ELECTRICAL INSTALLATION
PROGRAMMING
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Universal Defrost Timer mounts in previous legacy boxes Perfect for aftermarket applications
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1. Turn off AC power
2. Open metal case to access control connectors
3. Connect wires from compressor to terminal A
4. Connect heater or hot gas solenoid to Terminal E
5. Connect wire to Terminal C from L1 – 120 VAC or 208-240 VAC line
6. Jumper Terminal C to Terminals B and D
7. Connect wire from L2/N to Terminal F
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Convert to 9145 Convert to 9045
Convert 8141 to 9145
8141 N 1 4
3 2 X
9145 A B C D E F G
Convert 8143 to 9145
8143 1 N 2
3 4 X
9145 A B C D E F G
Convert 8145 to 9145
8145 3 4 X
1 2 N
9145 A B C D E F G
Convert 8041 to 9145
8041 N 1 4
3 2 X
9145 A B C D E F G
Convert 8045 to 9045
8045 2 N 1
4 3 X
9045 A B C D E F
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Time or Temperature Terminated in Electric Defrost
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Flashes at 12:00 Noon
Refrigerate LED is on
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1. Scroll cursor to desired defrost start time
2. Press “Defrost Start/Stop” once
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1. Rotate cursor to the first segment in the defrost
2. Press “Clear”
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Press, hold and release all four buttons to clear the program
The Defrost Timer will return to its original power up state
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The UL standard used for temperature regulating commercial refrigeration equipment is UL873?
□ True □ False
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The Paragon 9145-00 defrost control will terminate a defrost cycle based on which of these inputs?
□ Pressure □ Temperature □ Time □ All of the above
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Which input voltage will not power a Paragon Defrost Timer?
□ 24V AC □ 120V AC □ 208V AC □ 240V AC □ 277V AC
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