Hamworthy WESSEX-HE 200, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD
WESSEX-HE 200 BOILER 500001008/K
27
Figure No. 7 - Sequence Controller Indicator Disc.
KEY: -
Position A: - Pre-Purge Starts
Approx. Time = 45 Seconds.
WHITE/BLUE
Position B: - Differential Pressure Proving
Switch Made - Red Line.
BLUE
Position C: - Ignition Circuit ‘On’
and Pilot Gas valve open.
BLUE/YELLOW
Position D: - Ignition Circuit ‘Off’
Pilot Proving Period Starts.
YELLOW/RED
Position E: - Main Gas Valve opens.
RED/YELLOW
Position F: - Pilot Gas Valve
Closes.
YELLOW/GREEN
Position G: - Burner Normal Run.
GREEN/WHITE
Position H: - Proving of
No Air Position.
WHITE
Figure No. 8 - Burner Flow System Schematic (Natural Gas)
KEY: -
I
- Manual Gas Valve (Ball Type)
II - Control Gas Valve
III - By - Pass Gas valve
IV - Pilot Gas Valve
V - Pilot Burner
VI - Main Burner
VII - Differential Pressure Switch
VIII - Burner Fan
IX - Gas
Orifice
X - Burner Insert
XI - Governor
XII - Air Swirler