40
temperature. When the temperature exceeds five degrees or more between
the two , the thermostat will default to the next available heat source.
The thermostat, upon sensing a temperature split of five degrees or more in
the electric heat mode will bring the gas heat on to assist the electric heat.
This is the first strike. A strike is created by the thermostat having to
change modes (or run dual modes to sustain a temperature split.) The
electric heat and gas heat will continue to run together until the thermostat
reaches the set temperature and satisfies. When the electric heat comes
back on, it will be electric heat only at that point. If the temperature again
drops five degrees or more from the set point, the thermostat will again
bring the gas heat on to assist. This is strike two. The system will then go
through the above stated procedures. If the temp should drop five degrees
from the set point for the third time, the thermostat will give up on the
electric heat, lock the electric heat out for two hours (showing either DIFF
on the display or FLASHING GAS HEAT on the display) and default to
gas heat only. You
WILL NOT
be able to run any electric heat during this
two-hour lockout.
This is the normal operation for these thermostats. We can also cause the
thermostat to lock out in a few ways. If we set the electric heat set point
five degrees or more higher than the room temperature the thermostat will
default the same as it would if the temperature dropped five degrees or
more. IF at any time the differential between the set temperature and actual
temperature is five degrees or more, the thermostat would go into a strike
point regardless of whether it is caused by raising the temperature too far,
or the temperature falling inside the coach.
The other way the thermostat will receive a strike is if the system runs for
twenty minutes and cannot reach the set temperature (satisfy). Again, the
thermostat senses that something is wrong with the system and defaults to
the next available heat source to assist. These strikes are the same as the
strikes mentioned above and any combination of three strikes will result in
a two-hour lockout.
Once the system comes out of lockout, it will only require one strike to go
back into lockout. So, keep in mind, if you are coming out of a two-hour
lockout, be careful to keep the set and room temperature within four
degrees otherwise you will lock the system out again.
Summary of Contents for MAJESTIC
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