Cascade Configurations
The boiler is also suited for configuration in a cascade applications. For overpressure flue gas cascade arrangements,
use our motorized flue gas discharge valve (available as an accessory). This prevents flue gas from flowing back to
boilers that are not in operation. As a result of the narrow width and depth of the boiler, a heat output of 375 kW (2 x
ONGAS 307/W ) can be provided in a floor area of just under 2 m2. A floor area of less than 3 m2 is sufficient to
include room for service and maintenance. If necessary, contact our technical department.
Gas rate adjustment instructions
FIRE OR EXPLOSION HAZARD CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH !
Gas leak test
·
Paint all pipe connections upstream of the gas control with a rich soap and water solution. Bubbles indicate a
gas leak.
·
If a gas leak is detected, tighten the pipe connection.
·
Stand clear while lighting the main burner to prevent injury caused from hidden gas leaks, which could cause
flashback in the appliance vestibule. Light the main burner.
·
With the main burner in operation, paint all pipe joints (including adapters) and gas control inlet and outlet
with a rich soap and water solution approved leak detection fluid.
·
If another gas leak is detected, tighten adapter screws, joints and pipe connections.
·
Replace the part if gas leak cannot be stopped.
Check for gas leaks with a rich soap and water solution any time work is done on a gas control. Keep soap and water
solution away from electrical connections. Disconnect power supply to prevent electrical shock and/or equipment
damage. Wiring must be in accordance with local regulations. The appliance manufacturer’s instructions should
always be followed. Before installing or replacing any control check that type number is correct for the application.
Ensure combustion chamber is free of gas before start up. Conduct a thorough check out when installation is
completed. At the first start the ignition control can be in lockout; depress reset button to free the ignition control.
Under normal circumstances no maintenance or service is required.
Summary of Contents for ONGAS 300/W Series
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