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LIT-R820_REV2-E03 

 

Power modules installation  

 

 

Important. 

 

All external safety devices like: contactors, relays, flow switch & thermal protections are to be supplied and 
installed by other. 

 

When the SCR is installed inside a panel, the enclosure needs to be adequately louvered for proper ventilation 
and heat dissipation. Call the factory for the derating amperage curves for these specific applications. 

 

Electronic controls require special care for wiring and startup. To avoid problems, carefully follow the 
procedures below. 

 

Look at the wiring diagrams, and study them carefully. Be sure that you understand how the system is supposed to 
work. 

 

A) 

Location:

 

1-  Can be installed inside a louvered approved cabinet or with the heatsink mounted externally.  
2-  Must be installed away from excessive heat source. 
3-  Nothing must restrain air circulation to the heatsink. 

 

B) 

Installation:

 

1-  If installed completely inside a cabinet, use the mounting tabs on the heatsink to secure the SCR to the back 

plate of the panel.  

2- If installed with heatsink outside the cabinet, use the proper model mounting template for the cut out 

dimensions and to check for mounting obstructions. 

3-  Respect mounting orientation  
 

( this side up ).  

4-  Mount the heatsink vertically on the side of the cabinet for proper heat dissipation. 
5-  Do not relocate the power switching modules on the heatsink. 

 

R820 Installation and Dimensions   

 

 

 

 

 

 

 

 

 

 

 

 

Mounting instructions & templates are available from the factory. 

 

The cutout templates include holes position for heatsink attachment to the electrical cabinet 

™

  Single phase R820 will have 2 mounting screw, 1 on each side. 

™

  Three phase R820 will have 4 mounting screw, 2 on each side. 

 

Respect mounting orientation ( this side up ).  

 

Mount the heatsink vertically on the side of the cabinet for proper heat dissipation. 

 

If mounted on top or bottom of the cabinet, derate maximum usable amperage by 25%. 

 

Do not relocate the power switching modules on the heatsink. 

 

 

 
 
 
 
 
 
 
 
 
 

 

 
 
 

R820 single phase 

Weight 

R820-211-REV2 

5.25 " 

4.50 " 

2.56” 

3.00 " 

3.75 " 

1.80 

R820-321-REV2 

5.25 " 

4.50 " 

2.56” 

3.00 " 

3.75 " 

1.80 

R820-341-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

3.75 " 

2.40 

R820-421-REV2 

5.25 " 

4.50 " 

2.56” 

3.00 " 

3.75 " 

1.80 

R820-441-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

3.75 " 

2.40 

R820-471-REV2 

5.25 " 

10.00 " 

2.56” 

3.00 " 

3.75 " 

3.50 

R820-621-REV2 

5.25 " 

4.50 " 

2.56” 

3.00 " 

3.75 " 

1.80 

R820-641-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

3.75 " 

2.40 

R820-671-REV2 

5.25 " 

10.00 " 

2.56” 

3.00 " 

3.75 " 

3.50 

R820 three phase 

Weight 

R820-213-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

5.75 " 

2.60 

R820-323-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

5.75 " 

3.70 

R820-343-REV2 

5.25 " 

10.00 " 

2.56” 

3.00 " 

5.75 " 

3.70 

R820-423-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

5.75 " 

2.65 

R820-443-REV2 

5.25 " 

10.00 " 

2.56” 

3.00 " 

5.75 " 

3.70 

R820-623-REV2 

5.25 " 

6.50 " 

2.56” 

3.00 " 

5.75 " 

2.65 

R820-643-REV2 

5.25 " 

10.00 " 

2.56” 

3.00 " 

5.75 " 

3.70 

Содержание R820 REV2 Series

Страница 1: ...mponent sourcing and matching for reliable operation They are compatible with many industry standard signals A typical application would be to control a modulating electric duct heater with a 0 to 10 Vdc control signal from an analog room thermostat The R820 power controller also contain four dip switch to adjust to the following control signals 0 to 10 Vdc control signal 2 to 10 Vdc control range...

Страница 2: ...t for proper heat dissipation 5 Do not relocate the power switching modules on the heatsink R820 Installation and Dimensions Mounting instructions templates are available from the factory The cutout templates include holes position for heatsink attachment to the electrical cabinet Single phase R820 will have 2 mounting screw 1 on each side Three phase R820 will have 4 mounting screw 2 on each side...

Страница 3: ...ch position S1 S2 S3 S4 0 to 10 Vdc control signal Off Off Off On 0 To 10 Vdc From a Building Automation System Dip switch position S1 S2 S3 S4 0 to 10 Vdc control signal Off Off Off On Modulating R oom Thermos tat 0 to 10 Vdc 0 to 10 Vdc Modulating S upply Air Control Thermos tat 0 to 10 Vdc Modulating S ignal From B AS S ys tem 1 2 3 Common 24 Vac 0 to10 Vdc output L1 2 Vdc 0 capacity 10 Vdc 100...

Страница 4: ...S2 S3 S4 4 to 20 mA control signal Off Off On Off Modulating R oom Thermos tat 0 to 135 Ohms 50 60 70 80 90 Modulating S upply Air Control Thermos tat 0 to 135 Ohms 50 60 70 80 90 4 to 20 mA Modulating S ignal From B AS S ys tem 1 2 3 L1 2nd S S R models only L2 L3 on 3 phase 0 Ohms 0 capacity 135 Ohms 100 capacity R W B 1 2 3 L1 2nd S S R models only L2 L3 on 3 phase 4 mA 0 capacity 20 mA 100 cap...

Страница 5: ...per wire size 3 Verify low voltage 24 Vac power supply wiring 24 Vac is present at terminals 1 2 of the R820 SCR 4 Create or simulate 100 heating demand Using present control system R820 Configured for 0 to 10 Vdc input signal Signal between terminals 1 3 is 10 Vdc or superior Dip switch properly configured S1 Off S2 Off S3 Off S4 On Be sure that the polarity is correct and not reversed to to Red ...

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