STEP 5 −− ELECTRICAL (Continued) −− Outdoor Control (A175) Jumpers and Terminals
Communication System
The jumper settings and link are default settings and ONLY control system operation if configuration settings in the icomfortt−enabled thermostat are not available.
Non−Communicating System
The unit will operate based on jumper settings and R−TO− DS link on the MAIN CONTROL. All unit setting changes must be done at the MAIN CONTROL. The Lennox ComfortSense® 7000 thermostat may be used, as well as other non−communicating electronic−only thermostats.
The Lennox icomfortt−enabled thermostat must be used in communicating applications.
NOTE Fan cycling routine when activated will cycle the fan ON for five minutes if the outdoor ambient air temperature is between 15ºF and 35ºF and the compressor has been OFF for 25 to 30 minutes. This option is to help reduce the potential for ice build up on the orifice ring during system OFF cycles that are greater than 25 to 30 minutes.
J3 ALL UNITS)
Set up of jumpers on replacement outdoor control.
(HP ONLY) J4
COMPRESSOR SHIFT DELAY
30
SECOND DELAY (DEFAULT)
30
7−SEGMENT
DISPLAY
PUSH
BUTTON
FAN CYCLING
JUMPER ON
FAN ON FOR 5 MINUTES ON
JUMPER OFF
DISABLE (DEFAULT)
OFF
SEE NOTE ABOVE FOR FURTHER DETAILS.
J1 (HP ONLY)
DEFROST TERMINATION TEMPERATURE
100
DEGREE
TARGET 
100907050 
0
SECOND DELAY
0
(TWO−STAGE HEAT PUMP ONLY) J2
SECOND−STAGE LOCK−IN TEMPERATURE
55
DEGREE
TARGET
90 DEGREE TARGET
70 DEGREE TARGET
50 DEGREE TARGET
(DEFAULT)
100 100100 90 9090 70 7070 50 5050
90 1009070 50
(DEFAULT WHEN JUMPER IS REMOVED OR MISSING)
55 |
| |
| 50 45 | |
|
| 40 |
50 |
|
|
DEGREE |
|
|
TARGET |
|
|
55 |
|
|
50 | ||
|
| 45 40 |
45 |
|
|
DEGREE |
|
|
TARGET |
|
|
55 |
|
|
50 45 | ||
|
| 40 |
40 DEGREE
TARGET (DEFAULT)
55 |
|
50 45 | |
| 40 |
DS TO R TWO−STAGE UNIT ONLY)
Cut for Humiditrol® − Enhanced Dehumification Accessory (EDA) applications.
NOTE − LINK NOT APPLICABLE TO ONE−STAGE UNITS. CUTTING LINK WILL HAVE NO AFFECT ON OPERATION OF ONE−STAGE UNITS.
FIGURE 14
Page 13
XC21 SERIES
