Maguire Products, Inc.
Rev. June 11, 2020
– ULTRA-600 Touchscreen
22
ULTRA By Maguire
- Ultra Low Energy Dryer
Energy Saver Modes
Maguire ULTRA Low Energy Dryers are proven to dry plastic materials 6x faster than conventional
dryers and use up to 85% less energy. This is due in part to the utilization of various Energy Saver Modes
that the user can enable.
LIM (limit) mode:
Preheat is unaffected. All post-preheat cycles: When the temperature of the air exiting the heating
hopper (T2) reaches ESL (default = 125°F), the heater and blower shut down. They remain in a
dormant state until one of two things happen: the unit cycles, or EST minutes (default = 30) elapse. If
EST minutes elapse, the blower and heater resume normal operation, bringing the material in the
heating hopper back up to temperature, then shut down again. This could continue indefinitely. This
logic is blocked for the first 5 minutes of a cycle to prevent residual heat from a previous cycle from
triggering a premature Energy Saver heater/blower shut-down.
DIF (differential) mode:
Preheat is unaffected. All post-preheat cycles: same thing as LIM mode, except the shut-off temp is not
a set value, rather it is based on a differential defined by the ESD parameter (default = 30°F). Example:
RTS = 250°F
ESD = 30°F
The heater and blower will shut down at a heating hopper exit air temperature of 220°F.
This logic is blocked for the first 5 minutes of a cycle to prevent residual heat from a previous cycle from
triggering a premature Energy Saver heater/blower shut-down.
DYN (dynamic) mode:
Preheat is unaffected. The first post-preheat cycle is run as a LIM cycle. The amount of heater/blower
dormant time at the end of said LIM cycle is then proportioned over the beginning and the end of the
subsequent cycle as per the ESP parameter (default = 02060) setting. Example:
During the first post-preheat cycle, which ends up being 35 minutes long, the heater and blower shut off
at VTA=15 minutes, equating to 20 minutes of blower/heater dormant time.
At the beginning of the next cycle, the blower and heater will remain OFF for (.60*20) = 12 minutes.
In theory, the blower and heater will be shut down for the 8 remaining minutes (of the 20 minutes) at the
end of the cycle (triggered by the ESL parameter as in LIM mode) if the throughput demand does not
change.
The “02” in the ESP parameter (default) is the minimum amount of beginning-of-cycle heater/blower
OFF time regardless of the previous cycle, so long as the previous cycle terminated via LIM.
The intention of the DYN mode is to allow a 3rd party loader to fill the heating hopper before heating
starts.
