Service and Parts Manual (2018, 2019, 2020, 2021, 2022)

40 PB
INSTALLATION
Install WRT2 Wireless Programmable Thermostat
NOTE: Instructions to install the WRT2 thermostat are included in this service manual. For all other thermostat installation
and troubleshooting, refer to the Installation/ Operation Manual and the applicable thermostat Accessory manual.
The Friedrich WRT2 is a programmable, wireless electronic thermostat, which can be used with the following heating/cooling
applications:
Single Stage Cool PTAC Units with Electric Heat (Models PZE07K3SB, PZE09K3SB, PZE09R3SB, PZE12K3SB,
PZE12R3SB, and PZE15K3SB)
Singe Stage Cool /Heat Pump PTAC Units with Electric (Auxillary) Heat (Models PZH07K3SB, PZH09K3SB,
PZH09R3SB, PZH12K3SB, PZH12R3SB, and PZH15K5SB)
Installer Button Codes
Function Thermostat Mode Key combination /
method
Installer menu OFF mode UP + FAN for 5s
Set time and
program (installer
menu 13 must be
set to ON)
OFF mode UP + MODE for 5s
Toggle Keypad
lock/unlock
HEAT / COOL
mode
UP + FAN for 5s
Toggle EMER
HEAT
HEAT mode DOWN + MODE
for 5s
Start RF pairing OFF mode DOWN + FAN for
10s
Specifications
• Input Voltage: 19 to 30 VAC
• Output Rating: Max. 1.5A per output wire (3A total)
• Temperature Control: 60°F to 90°F (16°C to 32°C)
Safety Information
• This thermostat is for LOW voltage applications only.
• Turn OFF electricity to all heating and cooling components.
• All wiring must conform to applicable local and national
building and electrical codes and ordinances.
Output wires
RF pairing
button
Status indicator
Blue = RF
Red = Outputs
Receiver ID label
F
C
AM
PM
SET
MORN
DAY
EVEN
NIGHT
SAT
SUN
MON
TUE
WED
THU
FRI
SCHED UNTIL
YEAR
MONTH
DAYEXIT
RESET
SETTINGS
FAN
AUTO
LOW
COOL
HEAT
OFF AUTO
WAIT
HIGH
2
E
Lock
Status
Time
of Day
Period
of Day
Week Day
RF
Status
Air Temp
Half degree for Celsius
Current time (programmable mode only)
Thermostat mode
Electric Recovery
indicator (HP only)
Fan speed indicator
Date setting
Heating/cooling
indicator
time indicator
Fan status indicator
Low battery
indicator
Set temp
Receiver
F
C
AM
PM
SET
MORN
DAY
EVEN
NIGHT
SAT
SUN
MON
TUE
WED
THU
FRI
SCHED UNTIL
YEAR
MONTH
DAYEXIT
RESET
SETTINGS
COOL
HEAT
OFFA UTO
WAIT
FAN
AUTO
LOW
HIGH
2
E
Opening notch
(underneath)
FAN Button
MODE
Button
Down Button
Up
Button
Transmitter
Figure 501 (Thermostat Transmitter)
Output wires
RF pairing
button
Status indicator
Blue = RF
Red = Outputs
Receiver ID label
F
C
AM
PM
SET
MORN
DAY
EVEN
NIGHT
SAT
SUN
MON
TUE
WED
THU
FRI
SCHED UNTIL
YEAR
MONTH
DAYEXIT
RESET
SETTINGS
FAN
AUTO
LOW
COOL
HEAT
OFF AUTO
WAIT
HIGH
2
E
Lock
Status
Time
of Day
Period
of Day
Week Day
RF
Status
Air Temp
Half degree for Celsius
Current time (programmable mode only)
Thermostat mode
Electric Recovery
indicator (HP only)
Fan speed indicator
Date setting
Heating/cooling
indicator
time indicator
Fan status indicator
Low battery
indicator
Set temp
Receiver
Figure 502 (Thermostat Transmitter)