CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. B [082509]
21
Remote Thermostat Selection
(optional for CACH/CAHH)
NOTICE
CACG/CAHG units
All are operated by a remote ther-
•
mostat.
CACH/CAHH units
The unit’s DIP switch #4 must be set
•
to OFF to enable remote thermostat
operation.
The controller will configuration will
•
have to be set for the unit’s cooling/
heating functions.
Follow instructions beginning on
•
page 28 to set up the controller and
DIP switches before proceeding.
THERMOSTAT selection
EMI thermostats
EMI offers several remote thermostats that
are compatible with EMI ductless split system
air handlers.
See the latest price list for a list of available
•
thermostats.
It is important to choose a thermostat
•
that will match the equipment that you
have selected.
For single-stage cooling or heating, choose
•
a single-stage heat/cool thermostat.
If you have selected an outdoor heat pump
•
unit and an indoor unit with electric heat,
then chose a two-stage heating, single-
stage cooling thermostat.
Field-supplied thermostats
When selecting a thermostat other than one
offered by EMI, it is important to choose a
24V thermostat that matches your applica-
tion.
EMI equipment is compatible with most
mercury bulb, digital or power-stealing ther-
mostats.
Cooling only
Select a thermostat that is compatible with a
cooling system.
The thermostat should have “R”, “Y” and “G”
terminals and may also have a “C” terminal.
Cooling only with electric heat
Select a thermostat that is compatible with a
cooling/electric heat system.
The thermostat should have “R”, “Y”, “W” and
“G” terminals. The thermostat may also have
a “C” terminal.
Heat Pump with electric heat
Select a thermostat that is compatible with
a single-stage cooling, two-stage heat, heat
pump system.
The thermostat should have “R”, “Y”, “O”, “W
(or W2)” and “G” terminals. The thermostat
may also have a “C” terminal.
If the indoor unit is not equipped with electric
heat, then a single-stage heat pump thermostat
is adequate.
