Installation, Wiring Connections | White Rodgers 37-7237A specification

INSTALLATION

!WARNING

Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

Remove Old Thermostat

A standard heat/cool thermostat consists of three basic parts:

1.The cover, which may be either a snap-on or hinge type.

2.The base, which is removed by loosening all captive screws.

3.The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adapter plate. Before removing wires from old thermostat, label each wire with the terminal designation from which it was attached. Disconnect the wires from the old thermostat one at a time. Do not let wires fall back into the wall.

Installing New Thermostat

1.Pull the thermostat body off the thermostat base. Forcing or prying on the thermostat will cause damage to the unit.

2.Place base over hole in wall and mark mounting hole locations on wall using base as a template.

3.Move base out of the way. Drill mounting holes. If you are using existing mounting holes and the holes drilled are too large and do not allow you to tighten base snug- ly, use plastic screw anchors to secure the base.

4.Fasten base snugly to wall using mounting holes shown in Figure 2 and two mounting screws. Leveling is for appearance only and will not affect thermostat operation.

5.Connect wires to terminal block on base.

6.Push excess wire into wall and plug hole with a fire re- sistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

7.Carefully line the thermostat up with the base and snap into place.

Batteries

2 “AA” alkaline batteries are included with the thermostat. To install the batteries, pull the battery door as shown by the arrow and lift open. Using the polarity indicated inside the bat- tery door, insert the batteries. To close the battery door, swing the door down while pulling in the direction of arrow. Once fully down, snap the door back into position. To replace the batteries, set system to OFF.

Figure 1 – Battery door shown open

“AA” Alkaline Batteries

Thermostat can be powered by system AC power or Battery.

If is displayed, the thermostat is battery powered. If

is not displayed, thermostat is system powered with optional battery back-up. When battery power remaining is approxi-

mately half, the will be displayed. When “Change ” is displayed, install fresh “AA” alkaline batteries immediately. For best results, replace all batteries with new premium brand alkaline batteries such as Duracell® or Energizer®. We recom- mend replacing batteries every 2 years. If the home is going to be unoccupied for an extended period (over 3 months) and is displayed, the batteries should be replaced before leaving. When less than two months of battery life remain, the setpoint temperature will offset by 10 degrees (10 degrees cooler in Heat mode / 10 degrees warmer in Cool mode). If offset occurs, the normal setpoint can be manually reset with or . Another offset will occur within two days if batter- ies are not replaced.

Figure 2 – Thermostat base and rear view of thermostat

Mounting	Mounting
Hole	Hole
Place Level	Place Level
across	across
Mounting Tabs	Mounting Tabs
(for appearance only)	(for appearance only)

WIRING CONNECTIONS

Refer to equipment manufacturers’ instructions for specific		Refer to figure 3 through 6 for wiring diagram specifications.
system wiring information. After wiring, see CONFIGURATION
section for proper thermostat configuration.
	TERMINAL DESIGNATION DESCRIPTIONS

Terminal		Terminal
Designation	Description	Designation	Description
L	Heat pump malfunction indicator for systems	W/E	Heat Relay/Emergency Heat Relay (Stage 1)
	with malfunction connection or Comfort Alert signal	W2	2nd Stage Heat (3rd Stage Heat in HP 2)
O	Changeover valve for heat pump energized	G	Fan Relay
	constantly in cooling	RH	Power for Heating
B	Changeover valve for heat pump energized	RC	Power for Cooling
	constantly in heating	C	Common wire from secondary side of cooling system
Y	Compressor Relay		transformer or heat only system transformer
Y2	2nd Stage Compressor	6	3 Wire Zone Valve – Energized when no call for Heat

37-7237A specifications

The White Rodgers 37-7237A is a sophisticated thermostat designed to bring comfort and efficiency to residential heating and cooling systems. It is known for its reliability, user-friendly interface, and a variety of features that cater to the needs of modern homeowners.

One of the standout features of the 37-7237A is its digital display, which provides clear and precise temperature readings, making it easy to monitor and adjust settings. The thermostat is equipped with a simple, intuitive interface that allows for straightforward navigation through its various functions, ensuring that users can easily customize their heating and cooling preferences.

The 37-7237A supports both heat-only and cool-only systems, providing flexibility for different types of HVAC setups. It is compatible with conventional systems as well as heat pumps, making it a versatile choice for numerous household configurations. Additionally, the thermostat offers programmable capabilities, allowing users to set different temperatures for various times of the day. This feature promotes energy efficiency and helps reduce utility costs, as homeowners can lower their heating or cooling when they are not home.

Technologically, the 37-7237A incorporates advanced features such as adaptive intelligent recovery. This technology learns how long it takes to heat or cool a space to the desired temperature and begins to adjust the system's operation accordingly. As a result, the thermostat ensures that the home maintains optimal comfort without unnecessary energy expenditure.

The 37-7237A also includes a built-in temperature sensor that ensures accurate readings, helping to maintain the desired indoor climate. This consistency allows for a stable and comfortable environment, while also protecting the equipment from potential damage caused by extreme temperature fluctuations.

Another benefit of the White Rodgers 37-7237A is its energy-saving capabilities. By utilizing a programmable schedule, users can avoid heating or cooling their homes when they are not occupied. This feature can lead to significant energy savings over time.

In summary, the White Rodgers 37-7237A offers a combination of user-friendly design, advanced technology, and energy efficiency features that make it an excellent choice for homeowners seeking to enhance their indoor comfort. With its versatile compatibility and smart programming capabilities, it's an investment that pays off in both comfort and cost savings.