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9.2
User Controls Common to All Versions
9.2.1
Combination Fan/Limit Thermostat
This is located on the top side of the heater, see Fig.2.1.
This control ensures the heater does not blow cold air in the normal heating cycle and protects the
heat exchanger against overheating.
Fan Thermostat (White Button)
Although it should not be necessary for the user to touch this control, it is worth noting that pressing
in the White button on the combination fan limit thermostat causes the main fan(s) to run continuously.
For normal operation this button should be pulled to the out position.
Limit Thermostat (Red Button)
If for any reason the main fan should fail or the air flow is reduced the built in limit thermostat will
cause the burner to go to safety shut down ‘lockout’. This condition will persist until the fault is corrected
and the red manual reset button is operated. The combination fan/limit thermostat is preset during
commissioning (see 4.3). Note: the heat exchanger must have cooled for reset to be possible.
9.2.2
Secondary Limit Thermostat
There is also a secondary limit thermostat situated on the heater side panel at the rear of the heater
section see fig 2.1. This is a hand reset device designed to fail safe and give further protection to the
heaters against fan failure. To reset this thermostat unscrew the plastic cover and press in the central
reset button. Note: the heat exchanger must have cooled for reset to be possible.
9.2.3
Burner Lockout Reset Button
This manual reset button which is built into the burner control box, and will illuminate the red warning
light on the electrical terminal box when the control has gone to safety shut down ‘lockout’.
This may be caused by flame failure.
After lockout has occurred, a waiting time of one minute must be observed before an attempt
to reset the control is made by pressing in the reset button on the side of the heater ( within the
controls section) or this function may be installed on site as a remote warning and reset button.
Содержание Dualair DA260G Series
Страница 2: ...Details of condense drain for cooling coil ...
Страница 8: ...Page 6 Fig 2 1 DualAir 300 Module Dimensions Section 2 Technical Data FRONT VIEW REAR VIEW SIDE VIEW ...
Страница 9: ...Page 7 Fig 2 2 DualAir 380 Module Dimensions FRONT VIEW REAR VIEW SIDE VIEW ...
Страница 33: ...Page 31 Fig 5 1 Wiring for DualAir Units On Off Burner 230v Controls Section 5 Wiring Diagrams ...
Страница 34: ...Page 32 Fig 5 2 Wiring for DualAir Units On Off Burner 24v Controls ...
Страница 35: ...Page 33 Fig 5 3 Wiring for DualAir Units Hi Low Burner 230v Controls ...
Страница 36: ...Page 34 Fig 5 4 Wiring for DualAir Units Hi Low Burner 24v Controls ...
Страница 37: ...Page 35 Fig 5 6 Wiring for DualAir Units BMS Burner Modulation 230v Controls ...
Страница 38: ...Page 36 Fig 5 7 Wiring for DualAir Units BMS Burner Modulation 24v Controls ...
Страница 39: ...Page 37 Fig 5 7 Wiring for DualAir Units Full Burner Modulation 230v Controls ...
Страница 40: ...Page 38 Fig 5 8 Wiring for DualAir Units Full Burner Modulation 24v Controls ...
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