Caltech Calaer 2 kW, Installation Manual

Page: 50 / 60

14. Operating instructions
48
14.2 Heater control knob
The control button is used to set a desired set point in temperature where
the temperature sensor is located and also to turn the heater on and off
when no other control unit is connected.
It features an off-position, a temperature gradient for setting the heater
thermostat and a status light for heater operation feedback.

To start the heater and increase the thermostat set point, turn the
control button in the clockwise direction.

To decrease the thermostat set point, turn the control button in the
counterclockwise direction.

The heater is turned off by turning the control button all the way in the
counterclockwise direction to the off-position until a “click” can be
heard.
14.3 Normal start and stop procedures
The heater is started by turning the control button from “off” to the desired
setting. The heater responds by starting the fuel pump after 3 seconds and
turning on the control button status light.
The fuel pump will stop after 7 seconds and the heater will then go to pre-
heating mode for 50 seconds where the glow plug is used to heat the
combustion chamber. After pre-heating the fuel pump is switched on again
and combustion will begin.
The glow plug is switched off when stable combustion is detected. For the
first two minutes, the heater will run at maximum output power. After that,
it will start to regulate the power to reach the desired thermostat setting.
To turn off the heater, switch the control button to the “off” position and
the heater will then initialize the shutdown procedure.
The shutdown procedure requires 5 minutes, during which the glow plug
and fan will be active to ensure controlled cool down and removal of fuel
residues from the heater. Once the shutdown procedure has completed the
control button status light turns off.