YMGI
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Your Modern Green Idea
19
UNIT FEATURES
This unit has many features which are different than those found on conventional PTAC units. The
servicer must be familiar with these features in order to properly handle the unit.
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LCDI Cords
-Underwriters Laboratories and the
National Electric Code (NEC) now require power
cords that sense current leakage and can open
the electrical circuit to the unit on units rated at
250 volts or less. In the event that unit does not
operate, check the reset button located on or near
the head of the power cord as part of the normal
troubleshooting procedure.
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Automatic 3-minute compressor lockout
-After the compressor cycles off, it will not restart for
three minutes.
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Random restart delay
-To help eliminate power surges after a power outage, the unit is equipped
with a two to four minute random restart delay feature. Whenever the unit is plugged in with the
master switch turned on and the mode switch set in the cool or heat mode, a random restart will
occur. A random restart condition can be avoided by setting the mode switch in the fan only or off
position before applying power to the unit.
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Indication LEDs
-The control panel has LEDs that
correspond to fan operation and to indicate unit status. The
LEDs next to the selections ON/OFF, FAN, COOL, and
HEAT indicate which operational mode is active.
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High Pressure Protection
The - unit will shut off
automatically when the pressure in the system is over 638 psi
and within 10 minutes, after the compressor turns off, the unit
will restart when the pressure turns back below 551 psi. This
protection can effectively avoid the burst and leakage of
pipes, lessen the system failures and prolong the service life.
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Failure Tolerance
-If the unit is in protection mode less than 4 times in one hour, the accumulation
times will reset to avoid system failure. Only when the unit enters protection mode more than 4 times
in one hour, the system will fail to restart automatically and need manual restart.
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Standard Physical Dimensions
-The series PTAC is with the same dimensions 42" wide x 16" high x
13- 3/4" deep.
Replacement of older units is made easy.
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Weather-Protected Electrical Components
-Vital electrical components are protected from the
weather by locating them on the indoor side of the weather barrier.
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Highly Featured Microprocessor Controls
-Microprocessor controls are programmed to interface
with the temperature sensors to maximize comfort conditions for the room occupant and provide
outstanding features. Thermistors are used to sense small changes in temperature to give excellent
room control and allow the microprocessor to monitor and react to changing conditions.
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Automatic Emergency Heat on Heat Pump Units
-Automatically uses electric resistance heat if the
heat pump fails.
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High-Temperature Heat Pump Operation Protection
-Automatically protects the compressor if heat
pump is operated with high indoor coil temperatures. Power to the outdoor fan and the compressor
are turned off if the indoor coil gets too hot during heat pump operation to prevent damage to the
compressor.
