Lennox International Inc 67M41 instruction

LENNOX HEAT PUMP ACCESSORIES

,1,_2003 Lennox industries Inc,

TeOh nical blications

Litho U.S.A.

Dallas, Texas, USA	504,797M
	05/03

HEAT PUMP CONTROL

T-STAT DF TEMPER KIT

INSTALLATION INSTRUCTIONS FOR T-STAT DF TEMPER KIT (#67M41) FOR USE

WITH LENNOX DUAL FUEL/BALANCE POINT CAPABLE THERMOSTATS

Package 1 of 1 contains the following: 1 - DT1 Discharge thermostat probe

1 - Bag assembly containing:

2 - wire nuts

4- #8-18 x 1/2 screws Field-provided supplies:

Thermostat wire

DT1 Discharge Temperature Probe

Installation Location

evaporator coil

DT1

discharge thermostat

probe

The DT1 defrost discharge thermostat is designed to be used with Lennox thermostats that have dual fuel capa- bilities and setable balance points, The thermostat al- lows for the furnace to cycle on and off during a defrost in order to temper the discharge air, and it protects the compressor from high refrigeration pressures during de- frost,

Installing the DT1 Discharge Thermostat Probe

The DT1 discharge thermostat probe must be installed between the indoor coil and the furnace,

1 - Find a location to install the probe that is on the the coil endplate, Ensure that the probe will clear all plumbing.

2- Remove the endplate from coil and cut a hole approximately 2" in diameter to allow for the DT1, 3 - With airflow arrow pointing in the appropriate posi- tion, use the four provided screws to secure the

probe to the endplate,

4 - Replace the endplate to the coil,

5- Using field-provided thermostat wire, connect the DT1 ($89) to the W1 terminal of the defrost board and W1 terminal of the furnace, See figure 2,

DT1 must be installed between the furnace and the evaporator coil with airflow arrow in correct position. Upflow application shown.

Figure 1

DT1 Discharge Temperature Probe Wiring

W1		W1
0	o%0	0
Defrost	DT1 (589) Discharge Air Sensor	Furnace
Board	80°F close

90°F open

Locate sensor in the air stream between

the furnace and the coil.

Figure 2

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67M41 specifications

Lennox International Inc. is a renowned leader in the heating, ventilation, and air conditioning (HVAC) industry, consistently at the forefront of innovation. One of its standout products, the Lennox 67M41, exemplifies the company’s commitment to providing efficient and reliable climate control solutions.

The Lennox 67M41 is a high-performance rooftop unit, designed to meet the diverse needs of commercial applications. Its key features include a robust design that ensures durability and longevity, making it suitable for various installations. The unit's compact size allows for easy placement on rooftops, without compromising on performance. This makes it an ideal choice for businesses looking to maximize their space efficiently.

One of the primary technologies integrated into the Lennox 67M41 is its energy-efficient operation. The unit employs advanced compressor technology, which provides variable speed options that adjust based on the load requirements. This capability not only enhances comfort but also leads to substantial energy savings. Additionally, the Lennox 67M41 is equipped with an economizer that allows for increased airflow and helps utilize outside air for cooling, thus further reducing energy consumption.

Moreover, the 67M41 features exceptional humidity control. Thanks to its advanced humidity sensing technology, it can maintain optimal indoor air quality, ensuring a comfortable environment for occupants. The unit also includes multi-stage heating and cooling capabilities, allowing it to respond effectively to fluctuating temperature demands.

Another notable characteristic is its low noise operation. The Lennox 67M41 is designed with sound-dampening features, making it quieter than many comparable units on the market. This makes it an excellent choice for businesses that require a noise-sensitive environment.

For ease of maintenance, the Lennox 67M41 is constructed with accessible service panels and includes a built-in diagnostic system. This allows technicians to quickly troubleshoot potential issues, thereby minimizing downtime and operational disruptions.

In summary, the Lennox 67M41 stands out as a powerful HVAC solution for commercial settings, boasting energy efficiency, advanced humidity control, quiet operation, and easy maintenance. Lennox International Inc. continues to innovate and lead the way in providing high-quality climate control solutions, and the 67M41 is a testament to this commitment.