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Page 16

505023M 04/06

BPS BPS

PS PS

Harmony III

t

 Zone Control System Option 3 − Lennox Heat Pump & 

Lennox Variable-Speed Gas Furnace (Dual Fuel)

IMPORTANT!

Connectivity is NOT COMPLETE until all electrical adjustments (jumpers and wiring changes) have been made.
See Electrical Adjustments for SureLight

®

 Board (page 6) and for BDC3 Board (page 7).

BALANCE POINT
SENSOR 56A83

DAMPERS(Spring
open, power close)

85
90

100
110
120
130

0%

10%
20%
30%
40%
50%
60%
70%
80%
90%

100%

NotUsed

OFF

0%

10%
20%
30%
40%
50%
60%
70%
80%
90%

100%

Zone4

PIAB

Zone1

PIAB

Zone2

PIAB

Zone3

PIAB

SYSTEM

Configuration

E−HEAT

Stages

Heating 
Staging Temp

50
55
60

Cooling 
Staging Temp

0%

20%
40%

0%

25%
50%
75%

OFF

0%

10%
20%
30%
40%
50%
60%
70%
80%
90%

100%

OFF

0%

10%
20%
30%
40%
50%
60%
70%
80%
90%

100%

Cont. Air
Reduction

Heating Air ‘
Reduction

DF
1
2
3

HP

 2COOL

2HP

GAS
1COOL
1HP

TDO

Fault
Recall

OFF

Vacation
Mode
Selector

ON

OFF

E−Heat
Selector

ON

1/2 AMP

DS FUSE

S

P

ARE DS FUSE

3 AMP 

P

ANEL FUSE

S

P

ARE P

ANEL FUSE

Thermostat 4

Thermostat 3

W C Y G R

W C Y G R

Balance

 Point

Sensor

Pressure Switch

Diag4

Diag3

Diag2

Diag1

E−Heat

Vacation

damper 4

damper 3

Damper 2

Damper 1

 Mode

Mode

Fan

Cooling

ElectHeating

Heating

Status

PRESSURE SWITCH

21J18 (R−22)

51M08 (R−410A)

      ESD CAUTION

TOUCH A GROUNDED METAL
OBJECT BEFORE TOUCHING
THE CIRCUIT BOARD

LENNOX

Harmony III

t

V3.0 2004

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 11.

1  2  3

120
VAC

24
VAC

C R

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).

Damper1

NC
NO
C

das

Damper2

NC
NO
C

Damper3

NC
NO
C

Damper4

NC
NO
C

Thermostat 2

Thermostat 1

W C Y G R

W C Y G R

W C Y G R

W C Y G R

Y1
Y2

O

RC

W1−Def

R
C
Y1
Y2
O
W1

R 
G
W1
W2
C
DS

RH

G

W1
W2
W3

DS

Equipment

Equipment

DISCHARGE AIR SENSOR
88K38 (included)

IMPORTANT

Connect
thermostat-gauge
wire to SureLight

®

board C" terminal

HEAT PUMP

VARIABLE

SPEED

FURNACE

Figure 21

NOTE

 − Do not wire Y" wire(s) from the

Harmony III

t

 zone control board to the

furnace terminal strip. Doing so causes
the motor to search" for proper CFM.

System Operation

This section describes the operation of the zone control
system.

Zone Thermostats

Only electronic thermostats with a C" terminal may be
used with the zone control system. The zone control sys-
tem distinguishes between heat pump and heat/cool ap-
plications via the SYSTEM jumper placement on the zone
control board.

1. Cool / Heat / Auto−Changeover ModesZone thermo-

stats send a heating or cooling signal to the zone con-
trol board. Thermostat servicing zone 1 is the central
control thermostat. Zones 2, 3 and 4 each have their
own thermostat. Thermostats may be standard or au-
tochangeover type.
Heat and cool demands present at the same time from
different zones (opposing demands) are satisfied on a
first come first served basis. If a heating demand and a
cooling demand reach the zone control board at the
same time, the heating demand is satisfied first. If op-

posing demands persist, the system will work to satis-
fy the current demand for a maximum of 20 minutes,
then switch over and try to satisfy the opposing de-
mand for a maximum of 20 minutes. When either de-
mand is satisfied, the system works to satisfy the other
demand.

NOTE − Allowing opposing demands to persist may
consume excess energy. If this condition continues,
check the installation (i.e. zone arrangement, supply
registers, return registers, zone loads etc.) and make
adjustments as necessary. Table 9 shows the time de-
lays that may be expected when opposing demands
are received from the zone thermostats.

The zone control system acknowledges a new or op-
posing demand as soon as it is received by illuminating
that zone’s thermostat input lights. If the first demand
is not satisfied by the time the delays elapse, the sys-
tem switches over and begins satisfying the opposing
demand. During the switchover, a delay may be im-
posed before the system begins satisfying the new de-
mand.

Содержание HARMONY II

Страница 1: ...cs Codes 25 Troubleshooting Diagrams 27 PIAB Calculation Worksheet 30 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE Shipping Packing List Items shipped with the Harmony IIIt Zone Control System inclu...

Страница 2: ...ke comfort settings for each zone A programmable thermostat should be used to provide a specialized heating and cooling sequence While the sys tem is in the zone mode a programmable thermostat con tro...

Страница 3: ...nical or electro mechanical thermostats will not work with the Harmony IIIt zone control system Recommended thermostats include S SignatureStatt Thermostat 1 heat 1 cool 81M26 IMPORTANT When using thi...

Страница 4: ...at Pump IMPORTANT LENNOX recommends ONLY Harmony II and Harmony IIIt Zone Control Systems for use with Variable Speed Blower Motor VSM technology 1 Lennox Blower Coil Unit with VSM Use ONLY blower coi...

Страница 5: ...appliances and sunny windows near concealed pipes and chimneys or in unconditioned spaces such as closets or exterior walls Dampers Motorized dampers in the supply duct system regulate air to the zon...

Страница 6: ...RTANT Be sure to cut jumper W914 if not cut the zone con trol board DS fuse will blow WARNING Electrical Shock Hazard Disconnect power from unit and wait at least five minutes to allow capacitors to d...

Страница 7: ...s remove any factory installed jumper between terminal R and W1 W2 or W3 D In all cases cut and tape wire 7 see figure 8 on the VSM harness that runs from the BDC3 board to the motor 9 Figure 8 4 5 1...

Страница 8: ...on Chart Model Equivalent Positions Harmony II 25 35 45 55 65 75 85 95 Harmony IIIt 0 10 30 40 50 70 80 90 When jumpers are set to 0 this corresponds to the mini mum air volume available according to...

Страница 9: ...is re duced during heating mode Determining Actual Air Delivered By Blower The actual CFM delivered to each zone will be determined by the zone control system settings blower motor control board setti...

Страница 10: ...AB 8 x CFM Max 2220 Min 720 x 1500 Min CFM 720 TOTAL 1920 CFM 4 Determine total air delivered during a continuous blower call Calculate these totals using the formu las and example Table 8 which uses...

Страница 11: ...hp 1hp 2 2hp 1hp 2 3 3 DOESN T MATTER Dual fuel heating 1 stage AC heat pump SYSTEM E HEAT Configuration Stages HP GAS df gas df 2cool 1cool 1 2cool 1cool 1 2hp 1hp 2 2hp 1hp 2 3 3 Figure 14 NOTE Vari...

Страница 12: ...g close to AC house wiring If this cannot be avoided limit close parallel of power and control wiring to a few feet Dampers and Damper Transformer Wiring Connect dampers to the zone control board as s...

Страница 13: ...NOTE If not already done remove the wire to K20 blower relay terminal 7 on BDC3 board and tape it off Also be sure the factory installed jumper between terminal R and W1 W2 and W3 has been removed He...

Страница 14: ...11 120 VAC 24 VAC C R IMPORTANT Connectivity is NOT COMPLETE until all electrical adjustments jumpers and wiring changes have been made See Electrical Adjustments for SureLight Board page 6 and for BD...

Страница 15: ...UNDED METAL OBJECT BEFORE TOUCHING THE CIRCUIT BOARD LENNOX Harmony IIIt V3 0 2004 System Configuration E Heat jumper settings page 11 piab jumper settings page 8 air reduction jumper settings page 9...

Страница 16: ...quipment DISCHARGE AIR SENSOR 88K38 included IMPORTANT Connect thermostat gauge wire to SureLight board C terminal HEAT PUMP VARIABLE SPEED FURNACE Figure 21 NOTE Do not wire Y wire s from the Harmony...

Страница 17: ...ing the blower may continue after the end of a demand until the heater is cooled sufficiently Cooling Operation When the Harmony IIIt zone control system receives a thermostat cooling call the followi...

Страница 18: ...p heat or in a dual mode system the heat demand is satisfied by the gas furnace Operation Troubleshooting Indicators Zone Control Board LEDs The zone control system operation is indicated by light emi...

Страница 19: ...ng proper operation Perform the gas and heat pump heating checks on pages 20 through 24 Table 9 Time Delays Delay Time Function Blower Off Delay gas heat only 3 1 2 min Gas Furnace only Dumps air into...

Страница 20: ...e damper functions properly repeat these steps for zones 2 4 Gas Heating Checkout Multiple Zone Prerequisites S All zone thermostats set to Heat OUTPUT STATUS LEDs DAMPER 2 3 4 OFF W1 on W RED on hEAT...

Страница 21: ...LEDs DAMPER 2 3 4 on DAMPER 1 Off W RED ON event Sequence 1 Y1 ON 2 Y2 IF EQUIPPED ON IF NO SIGNIFICANT WARMING AFTER 4 MIN 3 W1 ON IF NO SIGNIFICANT WARMING AFTER 4 MIN THEN W2 THEN W3 PRESSURE SWITC...

Страница 22: ...ing 3 1 2 minute purge Other zones damper LEDs are on during the 3 1 2 minute purge dampers closed After 3 1 2 minute delay all dampers LEDs go off dampers open Heat Pump Heating Checkout Central Cont...

Страница 23: ...individual zone damper functions properly repeat these steps for zones 2 4 Gas Heating Checkout Multiple Zone Dual Fuel Option and BPS Prerequisites S All zone thermostats set to Heat S Balance Point...

Страница 24: ...ill produce a faulty reading At 77 F the resistance of the sensor will be 10K ohm at lower probe temperatures ex pect higher resistance at warmer probe temperatures ex pect lower resistance After read...

Страница 25: ...or Some of the errors found in table will cause a fail safe or shutdown condition The system will shutdown after the er ror is present for about five seconds During a shutdown condition all dampers wi...

Страница 26: ...ill cycle from high to off in cooling The compressor will cycle from high to off in heating The furnace will operate normally in gas heat Replace discharge probe If error persists replace zone control...

Страница 27: ...spond to demand 0 volts AC open 24 volts AC closed Dampers should drive closed when 24 volts is jumpered to damper motor Is wiring correct in good condition Figure 23 Line Voltage to transformer 24VAC...

Страница 28: ...n relays may need to be used 24VAC supplied to each thermostat terminal R from zone control system Check each thermostat for output signal when calling Heating output W1 Cooling output Y1 Do dampers r...

Страница 29: ...charge air plenum as de scribed on Page 5 Is it wired cor rectly Does outdoor unit respond to demand Is it operating properly Test Defrost Does outdoor unit initiate and terminate defrost correctly W1...

Страница 30: ...AB 0 2 x 100 20 Zone 1 CFM Required Minimum Maximum Minimum ZONE 1 PIAB x 100 b b ZONE 1 PIAB x 100 b ZONE 1 PIAB x 100 Zone 2 CFM Required Minimum Maximum Minimum ZONE 2 PIAB x 100 b b ZONE 2 PIAB x...

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