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

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Table Of Contents

INTRODUCTION

41 PB

INSTALLATION

Install WRT2 Wireless Programmable Thermostat

Installing the Thermostat

The WRT2 thermostat comes in two parts: a receiver unit that is

wired to the PTAC unit and a transmitter unit that is installed on

the wall and wirelessly communicates with the receiver unit.

Mount Receiver Unit (Figure 503)

1. Remove the cover from the front of the PTAC unit.

2. Mount the receiver unit using double-sided tape.

3.Wire each output wire into the PTAC terminal block. Ensure

that the bare end is fully seated into the connector then tighten

securely. Pull gently on wires to ensure they are secure.

Wiring Connections

Singe Stage Cool /Heat Pump PTAC Units with Electric (Auxillary)

Heat (Models PZHXXXXSB) (Figure 504)

Note 1: Make the following Installer Settings for Heat Pump units

Change over valve Type B - Set installer settings Menu #6 to HP

PZHxxxxSB

Note 2: When congured for Heat Pump operation, the “Y” wire

will be energized for during both cooling and rst-stage heating

operation.

Note 3: Connect the “W2” wire to the “W” terminal. The “W1” does

not get connected.

Single Stage Cool PTAC Units with Electric Heat (Models

PZEXXXXSB) (Figure 505)

Note 1: Connect the “W1” wire to the “W” terminal. The “W2” wire

does not get connected.

Note 2: For PTAC units with only one fan speed (single “G” fan

terminal), use the “GL” wire for wiring and Installer Settings menu

Item 12 (High Fan) must be set to “OFF”

Single Stage Cool PTAC Units with Electric Heat Disabled

(Models PZEXXXXSB) (Figure 506)

Note 1: If connecting to a Cool only PTAC unit, the “W1” and

“W2” wires do not get connected, and Installer Settings menu 03

(Available Modes) should be set to “04: Cool Only”

Refer to Digital User Conguration

Note 2: For PTAC units with only one fan speed (single “G” fan

terminal), use the “GL” wire for wiring and Installer Settings menu

Item 12 (High Fan) must be set to “OFF”

Thermostat Connections

R = 24V Power from Unit

Y = Call for Cooling

W = Call for Electric Heating

B = Reversing Valve Energized in Heating Mode

GL = Call for Low Fan

GH = Call for High Fan

C = Common Ground

*If only one G terminal is present on thermostat connect to GL

for low speed fan or to GH for high speed fan operation.*

Figure 503 (Thermostat Receiver Installation)

Figure 504(Thermostat Reciever Wiring PZHXXXXSB)

Figure 505(Thermostat Reciever Wiring PZEXXXXSB

with Electric Heat)

Figure 506(Thermostat Reciever Wiring PZEXXXXSB

with no Electric Heat)

BR/O