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
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-
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
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
05/03 |
| 504,797M |
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