Generally the outside temperatures would be below 15 degree F or –9 C This
will operate both resistance heaters instead of the heatpump and will be more
effective at supplying heat for the shelter.
The supply fan is constantly ON to allow a better air mix of heating and
cooling to help avoid uneven cooling or heating of the shelter when the
compressor unit cycles off. The fan is preset to always start in low mode and
can be switched to high by the user on the controller. In cold weather
operation, the fans lower speed using the resistance heaters will be slightly
more effective in heating.
Emergency operation mode
The ECU can be manually operated in the case of a controller failure, loss, if
the control cable gets damaged or an internal relay becomes inoperable.
The emergency bypass should only be used when there is an issue that
cannot be resolved and heating or cooling is mandatory.
Care should be taken
not to switch
between heating and cooling or on and
off without allowing at least a (3) three minute shutdown between cycles to
allow the compressor to equalize or you could damage the system.
Controller cable
connection
Emergency
Bypass Switch
Emergency Cooling
ON
OFF Normal Position
Emergency Heating
ON
Emergency
operate switch
When operating in emergency mode there is no temperature control so the
unit will have to be manually operated to maintain thermal comfort in the
shelter.
