COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 11: USER INSTRUCTIONS 11.1 User Instructions
The CTCU heaters are fully automatic and operate from the external controls fitted on site.
The only user controls at the heater are the:
Burner Lockout |
|
Reset Button | See Page 18, Section 11.3.3 |
Limit Thermostat Reset See Page 18, Section 11.3.2
WARNING
Electrical Shock Hazard
Disconnect electrical power before servicing.
Failure to follow these instructions can result in death or electrical shock.
11.2 Heater Operation
When the heater has been switched on by the remote controls installed on site, the main burner will automatically turn on.
The burner control box will control the safe ignition of the flame.
All heaters require a constant gas and electricity supply which must not be interrupted during the normal operation of this heater.
Figure 11: Heater Operating Sequence
| ON | CLOSE |
THERMOSTAT |
| DOWN |
CALL FOR |
|
|
HEAT | ON |
|
BURNER |
|
|
RUN | ON |
|
|
| |
| RUN ON | |
FAN |
|
|
11.3Common User Controls 11.3.1 Fan Thermostat
The fan thermostat is located inside the access door at the top of the heater. See Page 28, Section 15.3. This control ensures the heater does not blow cold air in the normal heating cycle.
11.3.2 Limit Thermostat
The limit thermostat is located inside the access door of the heater. See Page 28, Section 15.3. This control protects the heat exchanger against overheating.
Press to reset
These are hand reset devices to give further protection against fan failure.
NOTE: To reset, the heat exchanger must be cool.
Description | Part Number |
Limit Thermostat | 90412100 |
WARNING
Explosion Hazard
If control locks out, do not make more than 3 attempts to restart the heater.
Dangerous gas mixtures can build up.
The fault must be traced and repaired by a registered installer or service engineer.
Failure to follow these instructions can result in death, injury or property damage.
11.3.3 Burner Lockout Reset Button
The red warning light on the back of the heater will illuminate when the control has gone to lockout. This may be caused by flame failure. Press the reset button on the back of the heater (See Page 5, Section 4.1) or the remote reset if installed on site.
11.4Lighting Instructions 11.4.1 To Turn On Heater
1. Ensure that the electrical and gas supplies to the heater are on. Check that the on site con- trols are “ON”.
NOTE: The thermostat setting must be above the ambient temperature for the heater to operate.
2.The automatic firing sequence will begin as described on Page 16, Figure 9. The heater will now operate automatically under the control of the on site controls. Following long shut down periods, the control may go to lockout. See Page 18, Section 11.3.3.
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