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Basic Info.
Model NO.
A4021A1002
Color
Blue
Weight
3.65kg
Power Supply
220 ... 240 VAC, 50 Hz
Ambient Temperature Range
Operating :--10 ... 60 °c
Power Consumption
Maximum 4.5 Va
Enclosure
IP40
After Warranty Service
Video Technical Support
Application/Usage
Gas Burners Industrial Accessories
Transport Package
Carton
Specification
20X10X12 cm
Trademark
Honeywell
Origin
American
HS Code
8302600000
Production Capacity
1000
Product Description
Honeywell A4021A1002 Oil Gas Burner Controller Electronic Leak Controller For Both Single And Combination Valves 
PRODUCT SPECIFICATIONS
Honeywell A4021A1002 Oil Gas Burner Controller Electronic Leak Controller For Both Single And Combination Valves 
DESCRIPTION
The A4021 valve proving system checks the effective closure of the valves before burner start--up (pre--configuration) or at the end of a heat demand (post--configuration). The configuration can be set by means of wiring the A4021 in two different ways, see Fig. 2. and 3. The flow chart (Fig. 5. ) and sequence diagram (Fig. 6. ) explain the procedure during the valve proving.
An external pressure switch monitors the pressure between both valves. The pressure switch must be set to half the inlet pressure in order to test both valves with the same sensitivity. After a short interruption of the mains supply during valve proving or during RUN, the A4021 restarts automatically. The A4021 valve proving system can be used with several pilot--valve configurations, like intermittent and interrupted pilot systems and 3--valve configurations as well.
An external pressure switch monitors the pressure between both valves. The pressure switch must be set to half the inlet pressure in order to test both valves with the same sensitivity. After a short interruption of the mains supply during valve proving or during RUN, the A4021 restarts automatically. The A4021 valve proving system can be used with several pilot--valve configurations, like intermittent and interrupted pilot systems and 3--valve configurations as well.
FEATURES
• Microprocessor technology
• Based on 7800 SERIES Burner Programmer safety technology.
− Dynamic relay test
− Safe start test
− Self--diagnostic test
• Testing independent of type of gas at any inlet pressure.
• Valve proving done by using the line pressure of the gas.
• Non--volatile lockout.
• Automatic valve proving before heat demand, after heat--demand or during pre--purge possible.
• Different test--times (per valve) available by different O.S. numbers. • Clear visual indication of the test sequence and faults--causes through 5 LEDs.
• Storage of fault code when line interruption occurs
• Can be applied in all
common valve configurations
common valve configurations
• 2--wire gas pressure switch.
• Output for external alarm signal.
• Optional external remote reset.
Functional
Field adjustments (calibration)
None
Test--times
Depending on O.S. number. For A4021A1002 and A4021A1010 per valve: 25 s.
Total test--time (depending on test time per valve)
For model A4021002 and A4021A1010: approx. 65 seconds
Reset
NON--volatile lock--out
Manual, with push--button on controller or with remote reset button.
Design life > 10 years or 250.000 cycles.
Recommended pressure switch
Recommended pressure switch
C6097A2 gas pressure switch
PRODUCT SPECIFICATIONS
| item | value |
| Place of Origin | American |
| Brand Name | Honeywell |
| Model Number | A4021A1002 |
| Product Name | Honeywell A4021A1002 Oil /Gas Burner Controller Electronic Leak Controller For Both Single And Combination Valves |
| Adapter burner | gas burner |
| Weight | 3.65 |
| Power supply | 220-240V AC 50HZ |
| Degree of protection | IP40 |
| Ambient temperature range | Operating :--10 ... 60 °C Storage :--40 ... 80 °C |
| Power consumption | Maximum 4.5 VA |
| Shipping Term | DHL/UPS/Fedex/TNT |
| Usage | gas burner accessories |
| After Warranty Service | Video technical support |
