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6.1 - Control with room thermostat only
The 42EM Atmosphera can be controlled by a Carrier room
thermostat.
6.1.1 - Standard configuration
The 42EM Atmosphera can be equipped with a plug-in quick-
connect terminal board to connect the various cables:
-
from the fan motor assembly
-
from the valve actuator(s)
-
from the electric heater
-
from the heating/cooling changeover valve (if used - this
is the changeover contactor for the 42EM configuration
with cooling or heating only coil).
This plug-in quick-connect terminal board is installed on a
DIN rail and protected by a plastic cover.
6.1.2 - Other possible configurations
6.1.2.1 - 6 speeds on external terminal board
For certain applications, the 42EM Atmosphera can be equipped
with
metal box
incorporating a plug-in quick-connect
terminal board to connect the various cables:
-
from the fan motor assembly
-
from the valve actuator(s)
-
from the electric heater
-
from the heating/cooling changeover valve (if used - this
is the changeover contactor for the 42EM configuration
with cooling or heating only coil).
With this option the six fan motor speeds are available from
this terminal.
This plug-in quick-connect terminal board is installed on a
DIN rail.
In addition a fuse is also installed on this DIN rail and an
ON/OFF switch is included on the metal box.
In this version the Atmosphera can operate in three fan speed
mode, controlled by a Carrier room thermostat (controlling
three speeds of the six speeds available on the unit terminal
board).
6.1.2.2 - 6-speed switch
For certain applications, the 42EM Atmosphera can be equipped
with a six-position speed selector installed on a metal box
incorporating a plug-in quick-connect terminal board to con-
nect the various cables from the fan motor assembly, the valve
actuator(s). the electric heater and from the heating/cooling
change-over valve (if used - this is the changeover contactor
for the 42EM configuration with cooling or heating only coil).
This plug-in quick-connect terminal board is installed on a
DIN rail.
In addition a fuse is also installed on this DIN rail and an
ON/OFF switch is included on the
metal box
.
In this version the customer selects the desired speed directly
on the unit, and the room thermostat controls the opening and
closing of the cooling and heating valves.