Appendix a, Remote Thermostat 208V Operation

920-087-02 (9-03)

Appendix A (continued)

Remote Thermostat 208V Operation

Connection Diagram

208V 60HZ

L2 L1

SMOOTH G RIBBED

	SECONDARY TRANSFORMER PRIMARY	240V
	SECONDARY TRANSFORMER PRIMARY	Y
24V		208V

COM

RED

Auto Changeover Thermostat

A single stage heat/cool thermostat with auto changeover is needed. The wiring scheme is the same as the manual thermostat.

Remote Thermostat Installation

Follow Steps 1 through 5 (pages 12 and 13), then:

6.Locate the terminal strip on the front of the control box (See Figure 9). Attach the thermostat subbase wires (field supplied) to the appropriately labeled terminals in accordance with the wiring diagram on the side of the chassis.

7.Carefully route the wires alongside the conduit or service cord. Attach the other end of the wires to the appropriate terminals on the thermostat subbase. See the thermostat directions for proper wiring and mounting of the thermostat.

The simplified connection diagram at left shows the factory configured wiring set for 240V operation. If you are going to use 208V exclusively, switch the two (2) black wires on the 240V post of the primary side of the transformer to the 208V post. This will ensure correct secondary (low) voltages for the unit. This is only required on remote thermostat units.

CAUTION

If the supply voltage is 208V, the low voltage transformer MUST be wired for 208V operation. Failure to do so will result in lower control voltages to the unit and can damage low voltage components.

Remote Thermostat Unit Operation

These units are controlled by the use of a remote thermostat that will cycle the unit to maintain desired room temperature. See thermostat operating instruction sheet for details.

The fan speed switch controls high and low speed fan operation. It is located on the control panel and is independent of the thermostat.

Figure 10
Terminal Strip Location
Remote	Contr
	Contr
	ol	Unit
	OFF	Unit
	ON
C W Y R G B

PTAC specifications

Friedrich PTAC (Packaged Terminal Air Conditioner) units are a popular choice for heating and cooling in commercial and residential spaces, thanks to their efficient design and reliable performance. Friedrich, a company with a long-standing reputation in the HVAC industry, offers a range of PTAC units characterized by advanced features and technologies that set them apart from traditional cooling systems.

One of the main features of Friedrich PTAC units is their high energy efficiency. Many of their models are Energy Star certified, which means they meet the stringent energy efficiency guidelines set by the U.S. Environmental Protection Agency. This efficiency translates into lower energy costs for users and reduced environmental impact, making them an excellent choice for energy-conscious consumers.

Friedrich PTAC units are equipped with advanced technologies that enhance their functionality. For instance, many units come with a built-in Wi-Fi option, enabling remote control through mobile devices. This feature allows users to monitor and adjust temperature settings, schedules, and modes from anywhere, providing convenience and ensuring energy is not wasted when spaces are unoccupied.

The design of Friedrich PTAC units also emphasizes ease of installation and maintenance. These units are designed to fit into existing wall sleeves, making replacement straightforward without significant structural modifications. Furthermore, their ease of access for servicing ensures that maintenance tasks can be performed quickly, reducing downtime and improving longevity.

Another key characteristic of Friedrich PTAC units is their robust construction. Built to withstand varying conditions, these units feature durable materials that ensure long-term reliability. Many models incorporate advanced sound-dampening technology, creating a quieter operation that enhances comfort, especially in residential applications.

Friedrich’s commitment to innovation is evident in its product line, offering various options to meet different climate requirements and user preferences. The units can provide both heating and cooling, making them versatile for year-round use. Additionally, they are available in various BTU capacities, allowing customers to select the appropriate model for their specific space needs.

Overall, Friedrich PTAC units are recognized for their efficiency, technological advancements, ease of installation, and sturdy design, making them an excellent choice for both commercial and residential applications where reliable climate control is needed.

Friedrich PTAC Appendix a, Remote Thermostat 208V Operation, Auto Changeover Thermostat

Models: PTAC