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IM 938-4 / Page 26 of 42
Remote Wall Mounted Thermostats
Remote Thermostat Control
The remote thermostat can be any thermostat that can inter
-
face with an electronic thermostat via RCBWYG terminals.
The Control Selection jumper must be in T’STAT position.
During a call the remote thermostat will pass R back to the
controller on a respective terminal. The push buttons on the
touchpad become inactive in the remote thermostat mode.
EXCEPT in T'STAT mode, the fan speed can be changed at
the Touchpad and the fan mode is dictated by the Remote
t'stat. However, the control pad LED display will indicate
the mode of operation, and the room temperature.
Note:
In terms of outputs, there are two types of
thermostats: relay contacts and solid state. If you
open the thermostat and don’t see relays then it
must be solid state. Manufacturers of solid state
output thermostats include loading resistors on their
installation kits. They are of 560 Ohm and 3W value.
These resistors are meant to load thermostat solid
state outputs in order for the output voltage to be
either 0 or 24VAC, i.e. no floating voltage. These
resistors are connected from W, Y, G to common (C),
respectively.
You can wire any type of 24Vac thermostat straight into
the REMOTE T’STAT connector of PTAC control boards,
667997102, 667997203 and 667997303 (Basic, Premium
and Auto-Changeover models) and the control boards will
recognize the signals from them.
Wall mounted thermostats are available for the PDAE/PDHE
unit in automatic or manual changeover styles. All include
a fan switch for constant “on” operation or “automatic” for
cycle operation with the compressor. When requested, all
necessary relays and transformers are factory mounted and
ready for attachment to field supplied low voltage wires. All
thermostats are 24-volt type and have dual Fahrenheit and
Celsius temperature setpoint scales.
NOTICE
When using existing thermostats by others;
There are two basic types of thermostats manufactured today;
those with relay contacts, and those with solid-state triacs. If
you open the thermostat and don't see relays then you can as-
sume it to be solid state.
Manufacturers of solid state output thermostats include loading
resistors on their installation kits. These are of low Ohm value,
approximately 560 Ohm and 3W. The resistors are meant to
load the thermostat outputs in order for the output voltage to be
either 0 or 24VAC, i.e. no floating voltage. These resistors are
connected from W, Y, G to common (C), respectively. Therefore,
if you are using existing solid-state thermostats, you may have
to add loading resistors for your PTAC controls to work properly.
Daikin thermostats do not require this modification.
Non-Programmable Thermostat Specs
Manual Changeover One-Stage Heat and Cool or
One-Stage Heat Pump
Daikin Part No. 910116771 (1-Pk, White with Wall
Plate)
Simple to operate, single push button for one-stage heating
and cooling, or single stage heat pump. Zone compatible and
4- or 5 wire compatible (terminal “C” is optional for non-
heat pump systems). System “heat-off-cool” switch and fan
“on-off” switch.
Specifications
Electrical Rating:
• 24 VAC (18 to 30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
• 30-minute power loss memory retention
Temperature Control Ranges:
• 45°F to 90°F, Accuracy: ± 1°F
System Configurations:
• 1 stage heat, 1 stage cool or single stage electric
heat pump
Terminations:
• R, C, W, Y, O, B, G