Lennox Harmony III Installation Instructions

HEAT PUMP
Page 17
HARMONY IIIT ZONE CONTROL SYSTEM
IMPORTANT!
DO NOT MAKE
CONNECTIONS
TO Y1 AND Y2
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 pro-
vide all heating (disallows heat
pump from providing any heat).
R
C
Y1
Y2
O
W1
R
G
W1
W2
C
DS
Y1
Y2
DAMPERS
(Spring open, power close)
Thermostat 2 Thermostat 1
240
VAC
24
VAC
PRESSURE SWITCH
21J18 (HFC−22)
27W13 (HFC−410A
W C Y G R
W C Y G R
IMPORTANT
Connect
thermostat-gauge
wire to C" terminal
on Heat Pump
terminal strip
VARIABLE
SPEED AIR
HANDLER
HEAT PUMP
IMPORTANT! Connectivity is NOT COMPLETE
until all electrical adjustments (jumpers and wiring
changes) have been made. See Air Handler Con-
trol Electrical Adjustments (Page 39).
NOTE − Do not wire Y" wire(s) from the
Harmony IIIt zone control panel to the air
handler unit terminal strip. Doing so causes
the motor to search" for proper CFM.
System Configuration & E−Heat
jumper settings − page 11.
PIAB jumper settings − page 8.
Air reduction
jumper settings
− page 9.
Heat/cool staging
jumper settings −
page 10.
DISCHARGE AIR SEN-
SOR 88K38 (included)
Connections for REMOTE
VACATION SWITCH OR
Humiditrol
®
Zoning Ac-
cessory
See System Configuration & E−Heat jumper settings − page 11.
SEE IMPORTANT
NOTE BELOW!
CONNECT TO THE
SAME POWER
SUPPLY AS THE AIR
HANDLER
NOTE:
SELECT # OF
HP STAGES
BY PLACING
JUMPER IN
APPROPRIATE
POSITION.
(2−STG HP
SHOWN)
ZONE CONTROL
TRANSFORMER
Figure 15. Harmony IIIt Zone Control System Option 2 −
Lennox Heat Pump & Lennox Variable-Speed Air Handler

Lennox Harmony III Specifications

General

Brand	Lennox
Model	Harmony III
Category	Control Systems
Language	English