COMBAT CUHA - Section 9.6 Lighting Instructions for Manual Ignition Heaters; 9.6.1

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UNIT HEATER
9.4 Lighting Instructions for Automatic Ignition Heaters
Types CUHA/A, CUHB/A, CUHC/A and CUHC/A
(See 9.6. for lighting manual ignition heaters)
9.4.1
Ensure that the electrical and gas supplies to the heater are on. Check that the time switch is in an
“ON” period and that the thermostat is set to the required temperature (which must be above the
ambient temperature for the heater to operate).
9.4.2
Operate the Installed remote controls to the “heat on” position and the automatic firing sequence will
begin as described in Section 2 of this manual.
The heater will now operate fully automatically under the control of the time switch and thermostats,
as installed.
Following long shut down periods the control may go to “lockout” (indicated by the red “lockout
light” being illuminated on the heater). To reset press in the “lockout reset button” and the sequence
will begin again automatically.
“Lockout” should not occur during normal operation of the heater and indicates that there is a fault
condition which must be corrected.
WARNING
Do not operate the 'Lockout' reset button more than three times.
Turn off the heater and consult a competent heating engineer to correct the fault.
9.4.3 To Turn the Heater Off (short periods):
Operate the installed remote controls to the “OFF” position. The burner will turn off immediately, but
the distribution fan will continue to run for a few minutes to dissipate the heat from the heat exchanger.
To restart turn the control used above to “ON”.
9.4.4 To Turn the Heater Off (long periods):
Carry out the operations of 9.4.3. Allow the fan to stop running automatically. Turn off the gas and
electrical supplies. To start the heater again, turn on the gas and electrical supplies and reset the time
switch as described in the manufacturers instructions. Carry out the operations in 9.4.1.
WARNING
If the control should go to ‘lockout’ again, do not make more than three attempts at
restarting the heater.
The fault must be traced and repaired by a competent person.