Publicité
Digital Control User Input Configuration
The adjustable control dip switches are located at the lower left hand portion of the digital Smart Center. The inputs are only visible and accessible with the
front cover removed from the PTAC.
Dip Switch Setting
1.
Emergency Heat Override – Switch 1
In the unlikely event of a compressor failure a heat pump unit may
be switched to operate in only the electric heat mode until repairs
can be made. Moving Dip Switch 1 to 'ON'.
2.
Wall Thermostat Switch 2
In order to enable the wall thermostat move Dip Switch to 'ON'.
3.
Fan Cycle Control – Switch 3-4
Disabled (Refer to Constant Fan Mode)
Figure 31
Dip Switches
DIP SWITCH
1
2
3
4
Switch
Description
1
Emergency Heat Override
for PDH Heat Pump
Models
2
Wall Thermostat Switch
3
Fan Cycle for Heating
4
Fan Cycle for Cooling
5
Setpoint Switch 1
6
Setpoint Switch 2
7
Room Freeze Protection
UP
5
6
7
DOWN
Function
Enables electric heat only operation in the event of a com-
pressor failure on HP models.
Enables the use of a wall thermostat or unit controls
Disabled (Refer to Constant Fan Mode)
Disabled (Refer to Constant Fan Mode)
Allows the temperature setpoint range to be adjusted.
Allows the unit to ensure the indoor room temperature does
not fall below 40F even when turned off.
4.
Electronic Temperature Limiting – Switches 5-6
The digital control is set from the factory to allow a temperature
range between 61° F and 86° F in both heating and cooling
mode. Dip Switches 5-6 can be used to set high and low limits for
either heating both, cooling both or both.
From the factory switches are in the down 'OFF' position. The
chart below shows the available electronic limiting ranges.
5.
Room Freeze Protection – Switch 7
Units are shipped from the factory with the room freeze protection
enabled. Room Freeze Protection can be switched off at the
owner's preference by moving Dip Switch 7 to 'OFF'. This feature
will monitor the indoor room conditions and in the event that the
room falls below 40°F the unit will cycle on high fan with the
electric heater. This occurs regardless of mode.
Freeze guard
Setpoint Limit 2
Setpoint Limit 1
Fan CON/CYC for cooling
Fan CON/CYC for heating
Wall Thermostat enable
Electric heat only (for Heat Pumps)
Factory Setting
Down - Normal Operation
Down - Unit Controls
No Applicable
No Applicable
Down
61F-86F
Down
(16C-30C)
Down - Freeze Protection Enabled
LOCATION OF
DIP SWITCHES
ON UNIT
Option
Up - Overrides compressor operation.
(PDH models only)
Up - Enables Wall Thermostat Usage
No Applicable
No Applicable
Up
63F-80F
Down
65F-78F
Down
(18C-28C)
Up
(19C-26C)
Up - Freeze Protection Disabled
FRP028
Up
68F-75F
Up
(20C-24C)
23
Publicité
