Mounting Hole Location, Checkout Procedure

Installer’s Guide

MOUNTING HOLE LOCATION

Note: All dimensions are in MM (Inches).

NOTE:

For model base size, see table on page 7.

From Dwg. 21D152989 Rev. 0

CHECKOUT PROCEDURE

After installation has been completed, it is recommended that the entire system be checked against the following list:

1.	Refrigerant Line, Leak checked	[	]
2.	Suction Lines and Fittings properly insulated	[	]
3.	Have all Refrigerant Lines been secured and
	isolated properly?	[	]
4.	Have passages through masonry been sealed?
	If mortar is used, prevent mortar from coming
	into direct contact with copper tubing	[	]
5.	Verify tightness of all electrical connects	[	]
6.	Observe outdoor fan during on cycle for clearance
	and smooth operation	[	]
7.	Indoor coil drain line drains freely. Pour water
	into drain pan	[	]

8.	Supply registers and return grilles open and
	unobstructed	[	]
9.	Return air filter installed	[	]
10.	Thermostat thermometer is accurate. Check
	against a reliable thermometer. Adjust per
	instructions with thermostat	[	]
11.	Is correct speed tap being used?
	(Indoor blower motor)	[	]
12.	Operate complete system in each mode to
	insure safe operation	[	]

Trane

A business of	Trane has a policy of continuous product and product data improvement and it reserves the right to change
American Standard Companies
www.trane.com	design and specifications without notice.

18-BC61D1-1

P.I. 7/06

4TWB3 specifications

The Trane 4TWB3 is a high-efficiency, energy-efficient heat pump designed to offer premium heating and cooling solutions for residential applications. It is part of Trane's multi-stage comfort systems, ensuring optimal performance and energy savings throughout the year. One of the standout features of the 4TWB3 is its variable-speed technology. This allows the unit to operate at different speeds depending on the heating or cooling demand, providing precise temperature control while consuming less energy.

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Installation and maintenance are simple with the 4TWB3, thanks to its user-friendly design and advanced diagnostics capabilities. These make troubleshooting straightforward for technicians, ensuring that any required service is efficient and minimally disruptive.

In summary, the Trane 4TWB3 heat pump combines advanced features, superior technology, and outstanding performance. With its focus on energy efficiency, quiet operation, and durability, it is an excellent choice for homeowners seeking reliable heating and cooling solutions.

Installer’s Guide