Discharge Air Sensor - Lennox Harmony III Installation Instructions Manual

Harmony IIIt Zone Control System Option 1 − Lennox Variable-Speed Gas Furnace &
DAMPERS(Spring
open, power close)

DISCHARGE AIR SENSOR

88K38 (included)
Vacation OFF for individual zone
control.
Vacation ON for all zones to be
conditioned at the same time.
Emergency Heat OFF to allow
Heat Pump to provide heat.
Emergency Heat ON to force
auxiliary (backup) heat to provide
all heating (disallows heat pump
from providing any heat).
IMPORTANT! Connectivity is NOT COMPLETE until all electrical adjustments (jumpers and wiring changes) have been made.
See Electrical Adjustments for SureLight
505023M 04/06
Lennox 2-Stage Air Conditioner
Thermostat 4
PS PS BPS BPS W C Y G R
Damper1
NC
NO
C
Damper2
NC
heat/cool staging
NO jumper settings − page
11.
C
Damper3
Heating
Staging Temp
NC
85
90
NO
100
110
C
120
130
Damper4
Cooling
NC Staging Temp
50
NO
55
NotUsed
60
C
Cont. Air
Reduction
das 0%
25%
50%
75%
Heating Air '
Reduction
air reduction jumper
0%
settings − page 9.
20%
40%
ESD CAUTION
OFF
Vacation TOUCH A GROUNDED METAL
Mode
OBJECT BEFORE TOUCHING
Selector
THE CIRCUIT BOARD
ON
OFF
Harmony IIIt
V3.0 2004
E−Heat
Selector
Fault
TDO Recall
ON
damper 4 damper 3 Damper 2 Damper 1
®
Thermostat 2
W C Y G R
Thermostat 3
W C Y G R
W C Y G R
piab jumper settings −
page 8.
Zone1 Zone3
PIAB PIAB
0%
OFF
10%
0%
20%
10%
30% 20%
40%
30%
50%
40%
60%
50%
70%
60%
80% 70%
90%
80%
100% 90%
100%
Zone2 Zone4
PIAB PIAB
OFF
OFF
0%
0%
10%
10%
20%
20%
30%
30%
40%
40%
50%
50%
60%
60%
70%
70%
80%
80%
90%
90%
100%
100%
SYSTEM E−HEAT
Configuration Stages
HP GAS DF
1
2COOL 1COOL
2
2HP 1HP
3
System Configuration & E−Heat jumper
settings − page 11.
E−Heat Vacation
Mode Mode Fan Cooling ElectHeating
Board (page 6) and for BDC3 Board (page 7).
Figure 19
Page 14
Thermostat 1
W C Y G R
24
VAC
C R
W C Y G R
IMPORTANT
Connect
thermostat-gauge
wire to SureLight
board C" terminal
(or to C" on blower
coil terminal strip)
NOTE − Do not wire Y" wire(s) from the
Harmony IIIt zone control board to the fur-
nace terminal strip. Doing so causes the
motor to search" for proper CFM.
2-STAGE CON-
DENSING UNIT
Y1
Y2
O
RC
W1−Def
Equipment
RH
G
W1
W2
W3
DS
Equipment
VARIABLE SPEED
FURNACE
Heating Status
120
VAC
®
Y1
Y2
C
R
R
G
W1
W2
C
DS