9
QVM 9
Series
1. Burner Safety Protection (Flame Detection)
When the flame fails or re-ignition fails, the gas supply is automatically cut off.
2. Safety Protection on Power Restoration
When the power is restored after a power failure, the water heater automatically starts and runs.
3. Ignition Failure Safety Protection (Flame Detection)
When the ignition fails, the gas supply is automatically cut off.
4. Safety Protection against Excessive Air Pressure
When a high air pressure exists in the flue, the air ratio control maintains correct combustion. When the
pressure becomes excessive, the gas supply is automatically cut off.
5. Explosive Ignition Protection
Explosive ignition is prevented with the air ratio control system.
6. Overheat Protection
Overheating burners or heat exchangers will automatically cut off the gas supply.
7. Low Water Level Safety
The water level in the heat exchanger is always monitored and the water heater will not start when there is no
water in the exchanger.
8. Thermostat Safety Protection
If the thermostat fails, combustion will be stopped and the gas supply is automatically cut off.
9. Freeze Preventation
When the temperature falls, the water heater automatically starts to prevent the freezing of the water heater.
When there is no gas available the circulation pump is automatically started.
10. Gas Pressure Control (Modulating Gas Control Valve)
Gas pressure is maintained constantly by the gas valve.
11. Short Circuit Safety Protection
A short circuit in the water heater will blow the fuse and automatically cut off the gas supply.
12. Auto Fan Detection
The rotation of the fan is automatically detected and controlled. Fan failure will stop the operation of the water heater.
13. Boiling Prevention
Excessive temperatures will automatically stop the water heater.
14. Lightning and Static Electricity Protection
Protection against lightning and static electricity is built into the controller.
Safety Protection
Advantages of
QVM 9
Hydronic Heating System
Summary of Contents for QVM9 Series
Page 4: ...QVM 9 Series 2 Model QVM 9 090W1 NG 125W1 NG 150W1 NG Identifying the Components...
Page 22: ...QVM 9 Series 20 Schematic of SCF 9 Installation Installation of the Flue...
Page 26: ...QVM 9 Series 24 Thermostat Model FR 5 Using the Thermostat FR 5...
Page 39: ...37 QVM 9 Series Wiring Diagram...
Page 41: ...39 QVM 9 Series Models QVM9 090W1 NG 125W1 NG 150W1 NG Exploded Views...
