Honeywell A4021A1002 Oil Gas Burner Controller Electronic Leak Controller for Both Single and Combination Valves

Min.Order: 1

Product origin: Shenzhen, Guangdong, China

Infringement complaint:

Complaint

US$ 644 ~ 736

Description

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.

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

• 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

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

Honeywell A4021A1002 Oil Gas Burner Controller Electronic Leak Controller For Both Single And Combination Valves

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