WARNING

FIRE HAZARD

•Do not exceed the specified voltage.

•Replace existing control with exact model and dash number.

•Protect the control from direct contact with water (dripping, spraying, rain, etc.).

•Label all wires before disconnection when servic- ing controls. Wiring errors can cause improper and dangerous operation.

•Route and secure wiring away from flame.

SHOCK HAZARD

•Disconnect electric power before servicing.

•Ensure proper earth grounding of appliance.

•Ensure proper connection of line neutral and line hot wires.

EXPLOSION HAZARD

•Shut off main gas to appliance until installation is complete.

CAUTION

Do not short out terminals on gas valve or primary control. Short or incorrect wiring may damage the thermostat.

INSTALLATION

MOUNTING AND WIRING

All wiring should be installed according to local and national electrical codes and ordinances.

The control must be secured to an area that will experience a minimum of vibration and remain below the maximum ambient temperature rating of 175°F. The control is approved for mini- mum ambient temperatures of -40°F.

When mounting the control, any orientation is acceptable. Choose a location that will not damage, obstruct or place stress on the control’s terminations, system wiring harness or system components. After finding a suitable location, drill four (4) 1⁄8” holes for mounting control. To ensure proper mounting hole locations, there is a mounting hole template on page 8 of this instruction sheet. Detach the page with the template from the instruction sheet and apply it to the mounting location. When drilling the holes, take care so that the transformer, wiring harness or other system components are not damaged. Four (4) #8 sheet metal screws are provided to complete the installation.

Refer to the wiring diagram and wiring table when connecting the 50A55 control to other components of the system.

UL approved, 105°C rated 18 gauge, stranded, 2⁄64” thick insula- tion wire is recommended for all low voltage safety circuit connections. Refer to 50A55 specification sheet for recom- mended terminals to mate with those on the control.

UL approved, 105°C rated 16 gauge min., stranded, 4⁄64” thick insulation wire is recommended for all line voltage connections. Refer to 50A55 specification sheet for recommended terminals to mate with those on the control.

The 50A55 has only one serviceable part–an automotive type fuse, which protects the low voltage transformer from damage if its output is short-circuited. If the fuse has opened up, remove whatever caused the short circuit and replace the fuse with only a 3 Amp automotive type fuse. If the fuse is not the cause of the control’s problem, replace the entire 50A55 control. There are no other user serviceable parts.

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White Rodgers 50A55-438 installation instructions Installation, Mounting and Wiring
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50A55-438 specifications

The White Rodgers 50A55-438 is a highly versatile and efficient thermostat widely recognized for its reliability and advanced features. Designed with both functionality and user-friendliness in mind, this device serves as an excellent solution for managing heating and cooling systems in residential and commercial applications.

One of the standout features of the 50A55-438 is its compatibility with a wide range of HVAC systems. It supports single-stage and multi-stage heating and cooling units, allowing users to integrate it seamlessly into various setups. This versatility makes it suitable for diverse environments, from single-family homes to larger commercial spaces.

The thermostat is equipped with a user-friendly interface, complete with a large, easy-to-read display that simplifies temperature adjustments and system monitoring. The illuminated screen enhances visibility, allowing users to operate the device even in low-light conditions. Its intuitive menu system guides users through programming options, making it accessible for individuals without extensive technical knowledge.

In terms of energy management, the White Rodgers 50A55-438 utilizes advanced algorithms that promote energy efficiency. The programmable capabilities enable users to set specific heating and cooling schedules, optimizing comfort while minimizing energy consumption. This feature is particularly beneficial for those looking to reduce utility costs while maintaining a pleasant indoor climate.

The thermostat also includes features such as a temperature lock, which prevents unauthorized adjustments, making it an ideal choice for rental properties or commercial sites where temperature control is critical. Additionally, it offers an automatic changeover function, allowing the device to switch between heating and cooling modes based on the ambient temperature, thus ensuring consistent comfort year-round.

The White Rodgers 50A55-438 is built to last, featuring robust construction designed to withstand the rigors of daily use. It operates quietly, contributing to a serene environment in homes and workplaces. Furthermore, installation is straightforward, as the thermostat is designed to fit standard wall plates and connections, enabling a hassle-free setup process.

In summary, the White Rodgers 50A55-438 stands out as a top choice for those seeking an advanced, efficient, and easy-to-use thermostat. Its compatibility with various HVAC systems, programmable features, energy-saving capabilities, and robust design make it an excellent investment for effective climate control. Whether for residential or commercial use, this thermostat meets the demands of modern temperature regulation with precision and reliability.
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