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Doku VARIOMAX_engl_06 12
June. 2012
Goch GmbH & Co. KG
5. One-stage Heater Startup
a) Open the gas valve and measure the gas supply line pressure at the test socket
(see Combination Valve
– Top View) The connected gas supply pressure must
comply with the specifications in Ch. 3
“Energy Supply”, otherwise the startup must
be interrupted.
Perform leak test at the ball valve and the screw connection up to the gas hose.
In case of appropriate gas supply pressure, the heater may be turned on using the
respective switching system (either manual switchbox or switching- and control
system).
Measure the gas supply pressure again during full load operation. If the
gas pressure is too low, the operation must be interrupted. After
measurement, close gas pressure test socket.
b) Operating Sequence of the SG 300 Controller
Connect electricity to unit.
1.5 sec after switching on, the igniter creates a high-voltage spark and,
simultaneously, the solenoid gas valve opens.
- If after an ignition attempt of max. 30 sec. no flame is recognized by the
ionization flame monitoring module, the ignition stops and the gas valve
closes (the heater shuts down for safety and sends a failure report).
- If during the ignition attempt (max. 30 sec.) a flame appears and creates an
ionization current ≥ 0.8μA, the ignition stops and the unit remains in
operation.
Reset after safety shutdown
The heater needs to be disconnected for at least 5 sec. Afterwards repeat
ignition as described above.
Reigniting
If a malfunction occurs during operation, the igniter will automatically turn
on for a maximum duration of 30 sec. If no ionization current is recognized
within this ignition attempt period, the heater goes into safety shutdown.
