Marstair 526 HL Series, Technical Manual

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HL OPERATING INSTRUCTIONS (using Speed Selector Switch and Thermostat)
The switches to operate the fan speed and thermostat control are located on the right hand side.
The upper knob selects temperature, which is automatically
controlled by an internal thermostat that senses return room air.
Lower room temperatures can be maintained by turning the knob
clockwise, further towards the snow flake. (Minimum is
approximately 19°C room temperature).
Similarly, higher room temperatures can be maintained by turning
the knob anticlockwise, further towards the sun.
The lower knob selects the fan speed required, or the Off position.
Knob Position
Effect
Upper Lower
Any
Unit Switched Off
As
Set
Minimum fan speed with auto
control for normal room
temperature
and lowest sound
level
As
Set
Medium fan speed with auto
control
As
Set
Maximum fan speed giving
rapid
change of room
temperature
HLR OPERATING INSTRUCTIONS FOR 97200211 (RCC30)