Product data

22
WIRELESS REMOTE CONTROL
1. A wireless remote control is supplied for system operation.
2. Each battery--operated wireless remote control can be used
to control more than one unit.
3. The wireless remote control has a range of 25 ft. (7.6 m).
Fig. 16 – Wireless Remote Control
WIRED REMOTE CONTROL (STANDARD
ON DUCTED UNITS)
1. Optional wired remote controller used for system operation
of all high--wall, cassette and floor console units.
2. Kit includes a wired remote controller and a connecting
cable.
3. Connect with wire terminal between remote controller and
indoor unit.
4. Display in _For_C and temperature increments every 1_F
or every 1_C.
Fig. 17 – Wired Remote Co ntrol
SEQUENCE OF OPERATION
NOTE: Simultaneous heating and cooling is not allowed.
At start -- up, the first indoor unit to call for operation (heating or
cooling) will control from the preset position, the mode of
operation for the rest of the indoor units connected to the same
outdoor unit. If the other units conflict in mode with the first unit
an error message appears on those units.
When a unit is set to COOL, HEAT or the DRY mode, the
electronic expansion valve is first initialized (closed) and then is
opened to a preset position.
Superheat heating for each fan coil (the ones that are ener gized) is
monitored and the position of the electronic expansion valve is
adjusted to ensure that each fan coil gets the appropriate amount of
refr i gera nt t o mai nt ain the require d supe rhea t. Aft er the se t point is
sati sfied a nd the fa n coil shut s of f , the e l ect ronic expansi on valve stays
open for a spe cif ied ti me to ens ure the system press ures e quali ze.
When the system is set for COOL, HEAT or DRY mode, the
compressor speed is varied by comparing the indoor air
temperature with the set point and continuously adjusting the
compressor speed (to keep the compressor running as long as
possible) in an effort to maintain the greatest comfort possible.
The indoor fan can run in either the MANUAL or AUTO mode.
When the fan is runs in the AUTO mode, the speed is determined
by comparing the room temperature to the set point.
In the COOLING mode, when the set point is satisfied, the fan
continues to run. In HEATING mode, when the set point is
satisfied, the fan speed is reduced and then runs continuously until
the coil temperature drops to a point cold air is blown on the
occupants in the space, at which time the indoor fan is
de--ener gized.
When the unit goes through the defrost cycle, the indoor fans are
de--energized and the refrigerant is circulated through all the fan
coils (even if they were off or on standby before the defrost cycle)
to maximize the heat transfer surface area available for defrost
operation.