Lennox Harmony III Installation Instructions Manual

INSTALLATION INSTRUCTIONS

E2011 Lennox Industries Inc.

Dallas, Texas, USA

Table of Contents

GENERAL

Introduction 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Dehumidification Accessories 2. . . . . . . . . . . . . . . .

Residential Zone Control System − Field Wiring 3. . . . . . . . .

System Components (included & separately ordered) 4. . . .

Installation planning & selecting heat/cool equipment 5. . . .

Installing Zone Control Components 6. . . . . . . . . . . . . . . . . . .

Zone Control Panel Jumpers:

General Information 8 Air Reduction 9 Air Reduction 9 Heat/Cool Staging 10

SYSTEM Configuration/E−Heat Stages 11

Common System Component Wiring 12. . . . . . . . . . . . . . . . . .

Zone Control Transformer Phasing 13. . . . . . . . . . . . . . . . . . . .

Component Specific Wiring 13. . . . . . . . . . . . . . . . . . . . . . . . . .

Minimum CFM in Variable Speed Furnaces 14. . . . . . . . . . . . .

System Flow Diagrams 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HEAT PUMP

Installing Heat Pump and accessories 16. . . . . . . . . . . . . . . . .

Zone control system wiringHeat Pump 17. . . . . . . . . . . . . . .

Heat Pump System Startup and Checkout 18. . . . . . . . . . . . . .

Heat Pump Heating Checkout − Single Zone 18

Heat Pump Heating Checkout − Multiple Zone 19

Heat Pump Heating Checkout − Central Control 19

Heat Pump Pressure Switch Checkout 20 Troubleshooting:

Zoning system with Heat Pump 21. . . . . . . . . . . . . . . . . . . .

HP Heating Operation 22

Defrost Operation 23

GAS FURNACE

Zone control system wiringGas Furnace 24. . . . . . . . . . . . .

G71MPP/SLP98/SL280V/EL296V:

Integrated Control Electrical Adjustments 25

System operation 26

Installation setup worksheet 27 G61MPV/G60UHV:

Integrated Control Electrical Adjustments 28. . . . . . . . . . . .

System Operation 30

Installation setup worksheet 32

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Harmony IIIt Zoning System

ZONING

505,023M 08/11 Supersedes 01/11

Litho U.S.A.

Retain These Instructions For Future Reference

IMPORTANT

Variable Speed Blower Motor (VSM) technology is required for use with Lennox Harmony IIIt Zone Control Systems.

Only technicians qualified for zoning installations should perform the equipment setup in this manual.

Gas Furnace Start−Up & Checkout:

Gas Heating Checkout − Single Zone 33. . . . . . . . . . . . . . .

Gas Heating Checkout − Multiple Zone 34 Gas Heating Checkout − Central Control 34

Troubleshooting:

Zoning system with Gas Furnace 35 Gas Heating Operation 36 Discharge Air Upper Limit & Differential Temp. 37

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AIR HANDLERS

Variations on common condensing unit applications:

Electric Heat, Hot Water Coil, Cooling Only 38. . . . . . . . . .

Air Handler Settings (All applicable models) 39. . . . . . . . . . . .

Installation Setup Worksheets:

CBX32MV/CBX40UHVCooling/Heating; Electric

Strip Heat (non−HP appls) 40. . . . . . . . . . . . . . . . . . . . . . . . .

CBX32MV/CBX40UHVHeat Pump; Electric Strip Heat 41

CBX32MV/CBX40UHV – Cooling Only or Cooling

with Hot Water Coil (non−HP appls) 42. . . . . . . . . . . . . . . . .

DUAL FUEL

Zone control system wiringDual Fuel 43. . . . . . . . . . . . . . . .

Dual Fuel Startup & Checklist 44. . . . . . . . . . . . . . . . . . . . . . . .

Gas Heating Checkout − Single Zone 44. . . . . . . . . . . . . . .

Gas Heating Checkout − Multiple Zone 45

Gas Heating Checkout − Central Control 46 Troubleshooting:

Zoning system with Dual Fuel 47

Dual Fuel Operation (Below Balance Point) 48

Discharge Air Upper Limit & Differential Temperatures 49

Dual Fuel Operation (Above Balance Point) 50

Defrost Operation 51 Installation Setup Worksheets:

G61MPV/G60UHV Dual Fuel; with

Honeywell 2−stage IFC control (HP appls) 52. . . . . . . . . . .

G71MPP/SLP98/SL28V0/EL296V Dual Fuel (HP appls) 53

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TROUBLESHOOTING

Operation & Troubleshooting Indicators 54. . . . . . . . . . . . . . . .

Fault Recall. Time Delays, Time Delay Override 55. . . . . . . . .

Diagnostics Codes 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting Air Delivered by Blower 58. . . . . . . . . . . . . . .

PIAB Calculation Worksheet 60. . . . . . . . . . . . . . . . . . . . . . . . .

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08/11 505,023M (#10009243)

*2P0811* *P505023M*

Page 1

GENERAL

Shipping & Packing List

Items shipped with the Harmony IIIt Zone Control System include:

1 − Harmony IIIt Zone Control System unit 1 − Discharge Air Sensor

Additional itemsordered separately; include (see System Components on Page 4):

S Transformer S Dampers S Thermostats S Balance Point Sensor kit (56A87) S Pressureswitch (For Heat Pump Option):

HFC−22 (27W12); HFC−410A (27W13)

S Tee for vapor line High Pressure Switch (87071) S Defrost Tempering Kit (67M41) S Humiditrol

EDA−024B (94M41), EDA−036C (94M42), EDA−060D (94M43)

S Humiditrol

if Humiditrol

Enhanced Dehumidification Accessory (EDA),

Zoning Accessory (HZA) Kit (39W67) (required

EDA, above, is used)

Introduction

The Lennox Harmony IIIt Zone Control System manages the distribution of conditioned air to specific areas or zones in a house or small commercial building by directing heated or cooled air to occupied areas without conditioning unused areas. This improves economy while providing a balanced and comfortable environment. The system can be used in the following Lennox HVAC system applications:

Option 1.Variable speed gas furnace used with a 2-stage

condensing unit.*

Option 2.Variable speed air handler unit (with or without

electric heat) used with a 2-stage condensing unit or heat pump.*

Option 3.Variable speed gas furnace used with a 2-stage

heat pump.*

*A 1 stage condensing unit (heat pump) may be used under specific circumstances as listed in Table 3 (see Page 5).

Variations on the options described above and included in this document are: cooling−only, hot water coil, and cooling system with electric heat applications.

The Harmony IIIt zone control system uses off−the−shelf, single-stage, non-heat pump, non−power-robbing electronic thermostats and motorized dampers in any of the applications to control distribution of conditioned air to different zones. This control allows conditioning of different zones within a residence while using a single HVAC system.

The zone control system operates in two modes: central control (vacation mode) or zone control. LEDs on the zone control panel indicate the current operating mode.

When the system is in the central control mode, a de- mand from the central control thermostat results in conditioned air being directed to all of the zones. In this mode, zone 1 thermostat is designated as the controlling thermostat; other thermostats are not used.

When the system is in the zone control mode, a zone is conditioned only upon demand from that zone’s thermostat.

The zone control system is ideal for retrofit applications as well as new construction. The system controls the air volume, eliminating the need for bypass dampers in most applications. The homeowner controls the system using zone thermostats to make comfort settings for each zone.

A programmable thermostat should be used to provide a specialized heating and cooling sequence. While the system is in the zone mode, a programmable thermostat controls the temperature for its particular zone.

Optional Dehumidification Accessories

The Harmony IIIt zone control system may be used in conjunction with a Humiditrol® Enhanced Dehumidification Accessory (EDA) and which also requires a Humiditrol® Zoning Accessory (HZA). This document reflects the control which is outfitted for connection to, and control of, the EDA in a zone control system using the HZA. See Humiditrol Zoning Accessory Installation Instructions for more information.

505023M 08/11

Page 2

Residential Zone Control System − Overview of Field Wiring

THERMOSTAT (ZONE 1 OR CENTRAL CONTROL

THERMOSTAT WHEN IN VACATION MODE)

ZONE 1

GENERAL

ZONE 2

THERMOSTAT

(ZONE)

ZONE DAMPER

POWER

HUMIDITROL® ENHANCED DEHUMIDIFICATION ACCESSORY

OPTIONAL

TRANSFORMER TO POWER

ZONE CONTROL PANEL, THER-

MOSTATS AND DAMPERS;

ALSO POWERS HZA CONTROL

WHEN EDA IS USED)

HUMIDITROL ZONING ACCESSORY (HZA)

THERMOSTAT

(ZONE)

ZONE DAMPER

*ZONE 3

LEGEND −

A Five wire low voltage  18 ga. minimum B Two wire low voltage OR Three wire if Power−open, Power−closed  18 ga. minimum C INDOOR UNIT: Up to nine wire low voltage  18 ga. minimum D OUTDOOR UNIT:

− Two (3, if LSOM equipped unit) wire low voltage (single-stage condensing unit or EDA) 18 ga. minimum

− Three (4, if LSOM equipped unit) wire low voltage (two-stage condensing unit) 18 ga. minimum

− Up to seven wire low voltage (single-stage heat pump outdoor unit) 18 ga. minimum

− Up to eight wire low voltage (two-stage heat pump outdoor unit) 18 ga. minimum

E Two wire low voltage (discharge air sensor) 18 ga. minimum F Two wire low voltage (pressure switch, heat pump only)  18 ga. minimum G Two wire  18 ga. minimum H Refer to the Humiditrol® Zoning Accessory (HZA) for wiring requirements.

ZONE CONTROL SYSTEM PANEL

*NOTE − Zone 3 and zone 4 not available with single-stage outdoor unit.

*ZONE 4

ZONE DAMPER

CONDENSING

UNIT OR HEAT

PUMP OUTDOOR UNIT

DISCHARGE

AIR SENSOR

VARIABLE SPEED

FURNACE OR AIR

HANDLER

THERMOSTAT

(ZONE)

ZONE DAMPER

OUTDOOR

THERMOSTAT /

BALANCE

POINT SENSOR

Page 3

HARMONY IIIT ZONE CONTROL SYSTEM

GENERAL

System Components

The Harmony IIIt zone control system consists of the following (n − required):

n Harmony Harmony IIIt zone control panel (included) n Discharge Air sensor (included) n Thermostats (1 for each zone; ordered separately) n 24VAC Power Transformer(s) (ordered separately) n Dampers (ordered separately) n Pressure Switch and Tee w/Schrader valve (for Heat Pump

systems; ordered separately)

S Balance Point Sensor (Optional for Dual Fuel systems) S Defrost Tempering Kit (Optional for Dual Fuel systems) S Remote Vacation Switch (optional; ordered separately)

Zone Control System

The Harmony IIIt zone control system monitors electrical signals and directs control signals between thermostats, dampers, and HVAC equipment (see figure 1).

DAMPER CONNECTIONS

Figure 1. Harmony IIIt Zone Control Panel

Discharge Air Sensor (DAS)

A discharge air temperature sensor (88K38) monitors the supply air. This electronic sensor’s probe is inserted into the discharge air plenum to gather air temperature data for the zone control panel. Figure 2 shows the kit; see figure 3 (Page 6) for location of the sensor.

TEMPERATURE/RESISTANCE CHART TEMP ºF RESISTANCE (OHMS)

PRESSURE SWITCH CONNECTIONS

REDUCTION

REMOTE VACATION SWITCH; CONNECTIONS FOR HZA

30 34,566 40 26,106 50 19,904 60 15,313 70 11.884 80 9,298 90 7,332 100 5,826

JUMPERS:

STAGING

TEMP‘

HEATING−−

COOLING−−

AIR

CONT.−−

HEATING−−

DISCHARGE AIR SENSOR CONNECTIONS

TIME DELAY OVER-

RIDE

SYSTEM OPERATION LEDS

THERMOSTAT CONNECTIONS

OUTDOOR THERMOSTAT / BALANCE POINT SENSOR CONNECTIONS

PIAB

JUMPERS

SYS CONFIG & E−HEAT JUMPERS

FAULT RECALL

DIAGNOSTIC

LEDS

Figure 2. Discharge Air Sensor

24VAC CONNECTIONS

FUSES

EQUIPMENT

CONNECTIONS

Thermostats

IMPORTANT

Use only Electronic thermostats. Mechanical or electro-mechanical thermostats will not work with the Harmony IIIt zone control system.

For all zones, use thermostats that are of this type:

S electronic thermostat S single-stage S non-heat pump S non-power robbing S autochangeover or non−autochangeover S Lennox recommends that zone 1 thermostat (central [vaca-

tion] mode controller) be programmable.

S Each thermostat must have a deadband between HEAT and

COOL.

Recommended thermostats include:

S ComfortSenset 7000 model L7742U Touch Screen Ther-

mostat. (IMPORTANT! When using this thermostat, only Precision Mode dehumidification can be used wherein 2°F of over-cooling is allowed. Also, it cannot reduce the blower speed because the zone control DS signal controls the blower. Thermostat D terminal is not used.

S ComfortSenset 5000 model L5711U Touch Screen Ther-

mostat − 1 heat / 1 cool / 7−day programmable.

Transformer

The dampers, zone control panel, zone thermostats and Humiditrol® Zoning Accessory (if EDA is used) are powered by a single, field−provided 24VAC transformer. Together, the zone control panel and thermostats require 10VA; dampers require 10VA each. The transformer must have an adequate VA rating to serve all components (see recommendations in table 1).

IMPORTANT

Up to 5 dampers per zone may be connected in parallel to the zone control panel not to exceed a total of six dampers for entire system.

Also, if more than 6 dampers are used, another transformer and isolation relay will be necessary.

Table 1. 24VAC Transformer selection chart

Catalog Number

10P17 40VA 120/208/240VAC, 24VAC 3 dampers

10P87 50VA 120/208/240VAC, 24VAC 4 dampers

12P61 75VA 120/208/240VAC, 24VAC 6 dampers

83P74 _ Electrical Box (4-in. square)

Size Description

VA LOAD = Panel plus−

505023M 08/11

Page 4

System Components (Continued)

Dampers

Motorized 24VAC powered closed/spring return open dampers are standard for the Harmony IIIt zone control system. However, power-open/spring-close" and poweropen/power-close" dampers can be accommodated.

Remote Vacation Switch

The Harmony IIIt zone control panel includes connections for an optional remote vacation switch (see figure 1). The same connections are also used for connecting an op-

tional Humiditrol

Zoning Accessory Installation Instructions for de-

ditrol

tails).

NOTE − If a remote vacation switch is connected for routing to a convenient location for end user operation, be sure the switch (field-provided) is properly labeled and instructions provided for proper operation.

DO NOT LOCATE THE REMOTE VACATION SWITCH NEXT TO OTHER HOUSE SWITCHES! THE RECOMMENDED LOCATION IS NEXT TO ZONE 1 THERMOSTAT.

Zoning Accessory controller (see Humi-

Installation planning & selecting heating and cooling equipment

GENERAL

Installation Considerations

The total HVAC system must be properly sized to provide the best comfort. Also, for best performance, zones should be similar in size so that each zone would require about the same CFM. Each zone’s ducting lengths should be similar in length whenever possible. Always attempt to keep CFM requirements per zone within 25% of the average CFM (see table 2).

If a small" zone cannot be avoided, give consideration to increasing the CFM of the small zone and linking a damper in a nearby zone that will open along with the small zone’s damper(s). The procedure for zone linking is described on Page 7.

Table 2. Adjusting for average CFM Example

Required CFM CFM adjusted to within average

Zn CFM Avg %CFM Adj Avg %CFM

1 500 2 825 1.16 825 1.12 3 775 1.09 775 1.05 4 750 1.05 750 1.02

713

0.70 600

738

0.81

Damper linked

with Zn 2

Variable Speed Blower Motor (VSM)

Indoor units with variable speed blower motors (VSM) are required to allow the zone control system to distribute adequate air to each zone. Use only units recommended in the following 3 options as only those will work with the Harmony IIIt zone control system; other types of units will not allow the Harmony IIIt zone control system to propor- tion the amount of air going to each zone.

Selecting/Installing Indoor and Outdoor Units

Outdoor units may be single or two−stage; use table 3 to determine which to use, based on the number of zones being implemented, and whether the air conditioned zones are of equal or unequal size.

Option 1

Lennox Gas Furnace with VSM only (G60UHV, G61MPV,

G71MPP, SLP98, SL280V, E296V).

S Lennox Condensing Unitas described in table 3.

Option 2

Lennox Air Handler Unit with VSM only (CBX32MV,

CBX40UHV, CB31MV, CBWMV).

S Lennox Heat Pump Unitas described in table 3.

Option 3

Lennox Gas Furnace with VSM only (G60UHV, G61MPV

G71MPP, SLP98, SL280V, E296V).

S Lennox Heat Pump Unit as described in table 3.

NOTE − Limited variations to condensing units described herein are detailed on Page 38.

Table 3. Condensing units / Heat Pump units

No. of zones

2 *Equal Single or Two−stage

2 *Unequal Two-stage only

3 or 4 Equal or Unequal Two-stage only

*Equal zones would have very similar total ducting lengths with CFM requirements within 10% of average CFM per zone. Unequal would have less similar ducting length and greater variances from average CFM (see table 2 example).

Comparative Zone sizes

Lennox Condensing Unit or Heat Pump

Page 5

HARMONY IIIT ZONE CONTROL SYSTEM

GENERAL

Installing Zone Control Components

When possible, position the sensor some distance away from the coil rather than in the immediate coil area. The Discharge Air Temperature Sensor should be located at least 10 inches above the coil.

Fasten the sensor bracket to the plenum with two self- tapping sheet metal screws.

Connect wires to DAS on zone control panel, NOT on the AHC or IFC (see figures 17 through 26).

Be sure that the tip of the sensor is located approximately 10 inches from the indoor coil in the discharge plenum, and 1/2 the depth of the plenum, and centered over the discharge airflow, side-to-side.

PLENUM

1/2

the width

of the

plenum

SENSOR MOUNTING DETAIL

Figure 3. Discharge Air Temperature Sensor installation (Typical Upflow Furnace)

Zone Control Panel

IMPORTANT

The electrical power source for the zone control system, i.e. the transformer primary, and furnace or air handler unit must be the same source. In addition, the zone control system power−up must occur at the same time or before the furnace or air handler unit is powered up.

Select an installation site for the Harmony IIIt control con- sidering the following location parameters:

S Is conveniently accessible and centrally located to facilitate

wiring from thermostats, dampers, pressure switch (if used), and HVAC equipment.

S Is in a non−condensing area (such as a closet). S Is NOT in a laundry room (nor other room in the house where

the humidity would typically be much higher than the rest of the house).

S Is NOT in any part of the building where the temperature may

exceed 150_F.

NOTE 1 − FOR UNITS WITH HUMIDITROLDischarge air sensor (DAS) MUST be located on the output side of the EDA (if used; see Humiditrol Zoning Accessory Installation 505,337M)

(254)

AIR HANDLER

SIDE VIEW

sensor centered in

discharge airflow

(ALSO see note 1)

SENSOR PROBE

see PROBE MOUNTING

DETAIL below

ECB

Electric

Heat

Strips

FURNACE

FRONT

VIEW

plenum

coil

Discharge Air Sensor

CAUTION

This device is manufactured using unpainted and pre-painted metal. Sharp sheet metal edges can cause injury. When installing the device, avoid accidental contact with sharp edges.

Install the discharge air sensor in the discharge plenum downstream from the cooling coil. Be sure that the discharge air will pass over the sensor before the air is distributed into the duct system. Typical upflow sensor applications are shown in figure 3; the sensor dimensions shown (distance from heat strips, coil, and position in plenum) also apply to other applications.

505023M 08/11

Page 6

Thermostats

Identify the best location for a thermostat in each zone. If two or more rooms are within a single zone, place the thermostat in a location that is central to all rooms. For example, if a zone contains two bedrooms, try to place the thermostat in a hallway near both bedrooms.

Do not install thermostats in drafty areas, behind doors, in corners, near radiant heat sources (appliances), near sunny windows, near concealed pipes and chimneys, nor in unconditioned spaces such as closets or exterior walls.

Transformer

Obtain an appropriately−rated transformer (see table 1, Page 4). Install the transformer in either the indoor unit or in an electrical junction box near the zone control panel.

Dampers

NOTE − The power source for the transformer must be the same power source as the indoor unit’s transformer.

Motorized dampers in the supply duct system regulate air to the zones. Some applications will be unique and require more than one damper per zone. If additional dampers are required, refer to the the wiring diagram in the Common System Component Wiring section (page 12). Also, if more than 6 dampers are used, another transformer and isolation relay will be necessary.

For more effective zone isolation, the return duct system may also be dampered by zone. Dampers for each zone must be wired in parallel. Install dampers in the desired locations; then run thermostat wire from the damper to the zone control panel and damper relays as needed.

Zone LinkingZone link a small zone to a large zone by wiring dampers in a manner similar to figure 4. Effectively, this distributes some of the small zone’s air to another zone to reduce the chance of overheating or overcooling

GENERAL

the smaller zone. Table 2 (Page 5) shows an example of an unequal zone and how to adjust to bring it within 25% of the average CFM. Figure 4 shows how the dampers may be linked to distribute some of the air from a small zone into another zone.

ZONE 1

ZONE 2

Zone

Dampers

Sm.Zone

Lg.Zone

Note: Zone Dampers are Power−Close type.

RELAY

Zone Demands to Small and Large Zones

Zone with Demand

None Small Sm.& Lg. Large

Closed (24V) Open (0V) Open (0V) Closed (24V)

Closed (24V) Open (0V) Open (0V) Open (0V)

Closed (24V) Closed (24V) Open (0V) Open (0V)

Figure 4. Zone Linking

DAMPER

This damper is linked to the zone 1 damper; it opens when Zone 1 opens to redirect some air away from Zone 1 and closes only when zone 1 damper closes.

DAMPER

Note: Zone Dampers are Power−Close type.

Zone 1 (smallest zone)

Zone 2 (largest zone)

All Zone 2 dampers open only for calls to Zone 2 calls for air.

Page 7

HARMONY IIIT ZONE CONTROL SYSTEM

GENERAL

Zone Control Panel Jumpers (General Information)

Setup for controlling equipment staging and volume of air to zones

This section provides information for installing jumpers on the zone control panel jumper banks (see figure 5). These jumpers define how the zone control system functions to control equipment staging and to deliver the proper amount of CFM to the zones.

HEATING STAGING

JUMPERS

COOLING STAGING

JUMPERS

CONTINUOUS AIR

REDUCTION JUMPERS

HEATING AIR

REDUCTION JUMPERS

PIAB

JUMPERS

SYS CONFIG & E−HEAT JUMPERS

Figure 5. Zone Control Panel Jumper Banks

CAUTION

Static electrical discharge will damage electronics.

Discharge static electricity before touching the zone control panel. Touch a grounded metal object before touching the circuit board.

Pin shown with

jumper on

ZONE 1 AT 10%.

Pin shown with

jumper on

ZONE 2 AT 0%

(allows min. cfm

airflow).

NOTE − Only zones 2, 3, & 4 have an OFF setting.

ZONE 1 ZONE 3

PIAB PIAB

ZONE 2 ZONE 4

PIAB PIAB

ZONES 3 AND 4 ARE SHOWN NOT USED (JUMPERS SET ON OFF").

Figure 7. PIAB Jumper Settings (typical)

NOTE − The blower speed may be affected by the reduction jumpers, if installed. See Page 9.

Upgrading from Harmony II®?

NOTE − If replacing a Harmony II® system, use conversion values in table 4 to maintain equivalent air settings when setting up the Harmony IIIt system.

Table 4. Air jumper positions conversion chart

Model Equivalent Positions (%)

Harmony II

Harmony IIIt 0 10 30 40 50 70 80 90

25 35 45 55 65 75 85 95

How PIAB Jumpers affect blower operation

A variable−speed motor will operate at its minimum speed or at any increment faster up to its maximum speed. The Percentage Into Adjustment Band (PIAB) jumpers control the speed variance of the motor.

When the zone control’s PIAB jumpers are set to 0%, the blower operates at the minimum air volume produced by the air handler and when set to 100%, the blower operates at maximum air volume produced by the air handler (see your air handler installation instructions for specific CFMs).

For example: if an air handler has a minimum air volume of 800 CFM, and a maximum of 1500 CFM, and the jumper is set to 0%, the air delivered to the zone will be 800 CFM. Similarly, if the jumper is set to 100%, the air delivered to the zone is 1500 CFM. By placing a jumper in the 50% position, you will direct airflow midway between the blower’s minimum and maximum CFM capacities.

PIAB JUMPER = 0%

MIN. 800 CFM

(MOTOR RUNS AT MINIMUM SPEED)

PIAB JUMPER = 50%

MID. 1150 CFM

(MOTOR RUNS AT VARIABLE SPEEDS)

PIAB JUMPER = 100%

MAX. 1500 CFM

(MOTOR RUNS AT

MAXIMUM SPEED)

Figure 6. VSM Adjustment Band Example

By installing jumpers at different % on each PIAB bank, you can direct different amounts of air volume to each zone. You must jumper a % on zone 1 and at least one other zone, and you must jumper OFF on unused zones as shown in figure 7.

Zone 1 PIAB Jumpers – 140ºF DAS

Zone 1 PIAB terminal strip has an additional jumper setting (labeled 140F DAS) that may be used for added operational flexibility (see figure 8). When the supplied jumper is in place across both pins, the discharge air sensor (DAS) upper limit will be 140°F instead of 160°F (default) to provide added operational flexibility.

HEATING STAGING

JUMPERS

COOLING STAGING

JUMPERS

CONTINUOUS AIR

REDUCTION JUMPERS

HEATING AIR

REDUCTION JUMPERS

PIAB

JUMPERS

NOTE − If the heating staging jumper is set to either 120 or 130 and the 140F DAS jumper is in place, the furnace will stage up at 115°F and down at 130°F (see Page 10).

Figure 8. 140F DAS Jumper

505023M 08/11

Page 8

Zone Control Panel Jumpers (Determining PIAB Jumper Settings)

GENERAL

Determining PIAB Jumper Settings

Table 5. Determine PIAB jumper setting

example CFM values

NOTE − Use the PIAB Calculation Worksheet on Page 60 (also see example below) to help calculate the zone control system PIAB settings.

1. From a cooling load analysis, determine what CFM is required for each zone. Also, from the air handler, determine its minimum and maximum CFM ratings.

2. Using the PIAB formula, found in Table 5 and reflected in the worksheet below, calculate the Percent Into Adjustment Band (PIAB) using the values from step 1 for each zone. Table 5 also gives example CFM values to illustrates how to determine the correct jumper for the PIAB for Zone 1 using those values.

3. Set the air selection jumper for the zone using the percent air determined in step 2. If the percent air falls between available jumper settings, select the nearest unit of ten.

4. For each zone, repeat steps 1 through 3.

Note − See page 8 for information on 140F DAS (discharge air sensor) jumper used on Zone 1 PIAB.

Zone 1 Zone 2 Zone 3 Zone 4 Min. Max.

1020 1500 720 OFF 720 2200*

*High cool jumper setting

PIAB formula

Using example values above, find PIAB for Zone 1:

PIAB (1020 − 720) = 300 =.20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PIAB Jumper setting % .20 x 100 20%. . . . . . . . . . . . . . . . . . . .

SETUP TIP!

PIAB calculations should provide a good starting point for setting jumpers. It may also be beneficial to set jumpers at a higher percentage of airflow such that the sound of air rushing is objectionable, and then reduce it incrementally by 10% until: 1) the sound of air rushing is not objectionable, and 2) ample, but not excessive, air volume is being provided to adequately heat or cool the zone.

Required CFM CFM

(Req’d CFM − min. CFM)

(Max. CFM − min. CFM)

(2220 − 720) =1500. . . . . . . . . . . . . . . . . . . . . . .

100

PIAB Calculation Example (see worksheet on Page 60 )

PIAB = [(Required CFM − Minimum CFM) / (Maximum CFM − Minimum CFM)] * 100

Sample CFM ' Required Minimum Maximum Minimum

Sample PIAB = ([___920 − 450 ] / [ 2000 − 450 ]) x 100

Sample PIAB = ([ 470 ] / [ 1550 ]) x 100

Sample PIAB = [ 0.303 ] x 100 = 30 %

Zone Control Panel Jumpers (Air Reduction)

Continuous Air Reduction Jumpers

During continuous fan mode without either a heating or cooling demand, the blower runs at the total percentage of the CFM jumper settings of the zones calling for continuous fan (not to exceed 100% of blower capacity). A continuous air reduction jumper allows the blower speed to be reduced by a percentage during continuous fan mode.

The selections are 75%, 50%, 25% and 0%. At the factory, the jumper is set on 0%. Set the jumper to the position equal to the amount of continuous air reduction desired. See figure 9.

NOTE − If the calculations using a reduction percentage indicated a resulting CFM lower than the blower’s minimum CFM rating, the blower will deliver its minimum CFM (see figure 6 on Page 8).

Heating Air Reduction Jumpers

NOTE − For heat pump applications, ALWAYS set the

jumper on 0%. High head pressures may result if air is re- duced during heating mode.

NOTE − For use in warm−climate areas where units have high cooling capacity with low heat capacity, ALWAYS set the jumper on 0%.

The heating air reduction jumper enables the blower speed, during heating only, to run at a reduced rate compared to the cooling blower speed.

The selections are 40%, 20% and 0%. Jumpers are set to 0% from the factory. Set the jumper to the position equal to the amount of heating air reduction desired. See figure 9.

factory

0% 25% 50%

75%

CONTINUOUS HEATING

settings

shown

0% 20% 40%

Figure 9. Air Reduction Jumper Settings

Page 9

HARMONY IIIT ZONE CONTROL SYSTEM

heating jumper Must be set on 0% for heat pump application

GENERAL

Zone Control Panel Jumpers (Heat/Cool Staging)

Heating/Cooling staging jumpers prevent any rapid staging of the equipment. This section shows the recommended settings for heating/cooling staging temperat ures and explains the temperature differentials for different equipment configurations. In the diagrams, sine waves indicate which stage operates during the rise and fall of discharge air temperature for the different heating/cooling staging jumpers. Recommended jumper settings are shown in bold type.

Heating Staging Temperature Jumper

Heating Staging temperature jumpers are used to set the temperature at which the 2nd−stage heating equipment comes ON. Its selections range from 85 − 130 (°F). The setting has a built-in differential of 20°F (except as described when 140DAS jumper is used).

During operation, when the discharge air temperature falls below the jumper setpoint, 2nd-stage heating begins. If the discharge air temperature reaches the differential temperature, 2nd-stage operation ceases and 1st-stage heating resumes until the temperature again falls below the jumper set point.

NOTE − For G71MPP and SLP98 furnaces only, the furnace ignition control will automatically adjust firing rate without a 2nd stage heat demand to match the blower airflow (CFM) requested by the Harmony IIIt zoning system. See Operation with G71MPP and SLP98" on page 26 for additional information.

Heat Pump (range: 85 − 110°F, recommended: 90). The maximum discharge air temperature at which the heat pump/electric heat is allowed to run is fixed at 135°F.

Discharge Air Temperature ºF

TIME "

1ST STAGE2ND STAGE

2ND STAGE

Gas Furnace w/140F DAS jumper (range: 100 − 130;

recommended: 120). When the 140F DAS jumper is in place (as shown to the right), the maximum discharge air temperature at which the furnace may run is fixed at 140°F. (Note the

140F DAS jumper’s impact on the differential at 120 and 130 settings):

Discharge Air Temperature ºF

TIME "

1ST STAGE2ND STAGE

2ND STAGE

105F

Discharge Air Temperature ºF

TIME "

1ST STAGE2ND STAGE

2ND STAGE

When the zone control system is applied to a heat pump with electric heat, the electric heat will be staged ON to maintain the discharge air temperature set by the heating staging jumper position.

Gas Furnace with 160°F upper limit (range: 100 − 130; recommended: 120). The maximum discharge air temper- ature at which the furnace may run is fixed at 160°F.

Cooling Staging Temperature Jumper

Cooling Staging temperature jumpers are used to set the discharge air temperature at which 2nd−stage cooling comes on. It is selectable between 50°, 55° and 60°F. A 7 degree total differential is associated with this staging temperature, beginning at the jumper setpoint, and extending to 7 degrees above the setpoint.

For any jumper setting, if the discharge air should fall to 45°F and any zone still demands cooling, the compressor will not run leaving only the blower to operate until the discharge air once again rises to 50°F and the 5 minute compressor OFF delay has been satisfied. For this reason, and to better satisfy latent loads, the jumper recommended setting is 50.

67F

62F

ºF

1ST STAGE 2ND STAGE

Discharge Air Temperature

TIME "

57F

1ST STAGE

505023M 08/11

Page 10

Zone Control Panel Jumpers (SYSTEM Configuration/E−Heat Stages)

GENERAL

SYSTEM Configuration/E−HEAT Stages Jumpers

The SYSTEM configuration jumpers must be inserted to select the type of cooling and heating system that has been installed and the E−HEAT Stages jumper defines if the system is dual fuel or defines the number of electric heating stages used.

Gas Furnace and Air Conditioning

For a gas furnace and air conditioning combinations, put the jumper on GAS (as shown) and select the

SYSTEM

Configuration

2COOL

2HP

number of equipment cooling stages by placing the cooling jumper to the appropriate site (place on

IN A/C AND GAS FURNACE CONFIGURATION, HP" AND E−HEAT" JUMPERS ARE IGNORED

1COOL for 1stage cooling or 2COOL for 2−stage cooling).

In this configuration, the maximum discharge temperature (upper temperature limit) at which the furnace is allowed to run is 160°F (except when 140FDAS jumper [as described on Page 10] is in place). At the upper limit, the zone control system removes any heat demand from the furnace for a minimum of 5 minutes and until the temperature comes back within normal operating temperatures.

While at or above the upper temperature limit, the control unit signals for continuous blower operation to those zones from which a thermostat heat demand is received. When setting up the furnace control board options, be sure to set the BLOWER-OFF DELAY to no greater than 210 SECONDS.

Heat Pump with Electric Backup Heat

For heat pump with electric backup heat, select HP position as shown in this diagram.

SYSTEM

Configuration

2COOL

2HP

GAS 1COOL 1HP

E−HEAT Stages

DF 1 2 3

E−HEAT Stages

DF 1 2 3

In this configuration, the maximum discharge temperature the electric heat or heat pump is allowed to run is 135°F. At that temperature, the zone control system removes demand from the heating unit for a minimum of 5 minutes and until the temperature returns to the normal operating temperature range. While at or above 135°F, the control unit signals for continuous blower operation to those zones from which a thermostat heat demand is received.

Select the number of equipment cooling stages by placing the COOL stages jumper to the appropriate side (1COOL or 2COOL). Similarly, set the number of Heat Pump stages (1HP or 2HP). Jumper settings on the above diagram illustrate the proper settings for a 2-stage heat pump and twostage air conditioning system.

When using a heat pump with electric backup heat, insert an E−HEAT jumper to select the total number of available electric heat stages. The diagram above shows a single heat-strip configuration.

Heat Pump− Dual Fuel heating, 1−stage or 2 Stage Heat Pump and Gas Furnace

This diagram shows a dual−fuel configuration (heat pump for heat and cool with gas backup heat).

SYSTEM

Configuration

2COOL

2HP

GAS 1COOL 1HP

E−HEAT Stages

DF 1 2 3

HP position must be jumpered for Dual Fuel applications and the E−Heat Stages jumper must be set to DF" for dual fuel operation.

NOTE − See figure 23 (Page 38), Variations on Common Applications for other jumper configurations and electrical wiring variations.

Page 11

HARMONY IIIT ZONE CONTROL SYSTEM

GENERAL

Common System Component Wiring

Use thermostat wire to connect dampers, damper transformers, and the DAS probe with the zone control system.

IMPORTANT

Avoid running any control wiring 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 panel as shown in figure 10. A total of six dampers may be connected at the

NOTE − The extended damper transformer rating should be sized to adequately handle zone dampers (1−4) plus relays (K1−K4) not to exceed class II wiring limit of 75 VA.

Combined load of zone dampers and zone relays not to exceed 60VA.

Use Lennox Part 56L68 for Zone Relays 1 through 4.

(NOT TO EXCEED 75 VA) CLASS II WIRING

EXTENDED ZONE 1 DAMPER

EXTENDED ZONE 2 DAMPER

EXTENDED ZONE 3 DAMPER

EXTENDED ZONE 4 DAMPER

120 VAC

24 VAC

damper output terminals on the zone control panel. If additional dampers are used, additional transformers and relays will be needed.

Fuse F1 will protect the damper outputs from a short circuit or overload in the damper wiring.

If dampers are applied to the return duct system, the dampers for each zone must be wired in parallel. Connect damper transformer to zone control panel terminal block. Refer to the Extended Damper Wiring section in figure 10 for wiring connections.

Discharge Air Sensor (DAS) Probe Wiring

Wire discharge air sensor probe to zone control panel. The variable immersion-temperature probe is not polarity sensitive.

ZONE CONTROL, THERMOSTATS, & DAMPERS TRANSFORMER

24 VAC

EXTENDED DAMPER TRANSFORMER (SEE NOTE)

ZONE RELAY K1

ZONE RELAY K2

ZONE RELAY K3

ZONE RELAY K4

EXTENDED DAMPER WIRING

ZONE 1 DAMPER

ZONE 2 DAMPER

ZONE 3 DAMPER

ZONE 4

DAMPER

120 VAC

Figure 10. Damper and Extended Damper Wiring Diagram

505023M 08/11

Page 12

GENERAL

Component Specific Wiring

CHECK VOLTAGE BEFORE CONNECTING ZONE CONTROL TRANSFORMER (ZONE CTRL XFMR) LEADS TO THE ZONE CONTROL PANEL CONNECTIONS

IF 0 VOLTS (AS SHOWN IN A")

THEN POLARITY IS CORRECT

IF METER READS 48 VOLTS (AS SHOWN IN B") THEN POLARITY IS RE-

VERSED; SWAP LEADS (AS SHOWN IN C") AND CONFIRM 0 VOLTS

Figure 11. Confirming Transformer Phasing (polarity) is Correct

Zone Control Transformer Phasing

Using two transformers on a single systemWhen the

Harmony IIIt zone control panel is connected to a system that has its own transformer, the phasing (or polarity) of the air handler transformer to the zone control’s add−on transformer is extremely IMPORTANT because the zone control transformer powers the DS" circuit within the zone control and then connects to the air handler DS" circuit.

The only two transformers that need correct phasing with their commons connected are the zone control and air handler transformers. Check the phasing prior to connecting the zone control transformer zone control panel’s connections. The zone control transformer primary should be the same source as the air handler to keep it uncomplicated. Use a 230 volt primary transformer with air handlers (CBX32MV / CB31MV / CBX40UHV) and use a 115 volt transformer with furnaces (G61MPV / G71MPP / SLP98 / SL280V / EL296V) and with CBWMV.

1. Connect the zone control transformer primary to the air handler voltage source (see figure 11).

2. Do not connect the zone control transformer secondary to the zone control panel at this time.

3. Connect air handler secondary common to the assumed zone control transformer common.

4. Measure voltage between air handler R" and unconnected zone control transformer secondary lead (see figure 11):

D if 0 volts (A, figure 11) then polarity is correct; connect the

leads to zone control C and R as shown.

D if 48 volts (B, figure 11) then polarity is reversed; swap

leads as shown and confirm 0 volts (C, figure 11); connect the leads to zone control C and R as shown.

5. With the correct polarity determined, connect C wire to zone control 24VAC C terminal and R wire to R terminal.

Thermostat Wiring

Using standard electronic 1-heat /1-cool non-heat pump, non-power robbing thermostats, and five−wire thermostat cable, wire units as follows:

1. Wire each thermostat to terminals Y, W, G, R, and C.

2. Run cable from each of the thermostats to the zone control panel. Mark each cable according to the zone thermostat from where it originates.

3. Strip the cables and attach each of the 5 wires to the zone control panel (see figures 17 [Page 24], 15 [Page 17], 26 [Page 43]).

Gas Furnace Wiring

IMPORTANT

The common C" terminal of the Harmony IIIt zone control panel MUST be connected to the common terminal of the integrated control, or if using a air handler, MUST be connected to the common terminal of the air handler terminal strip.

If not connected, blower may operate only at the minimum CFM or will not ramp to zone air volume.

After the furnace is installed, field wire the unit as described in the installation instructions provided with the furnace. Use thermostat wire to connect the furnace and the zone control panel and to connect the zone control panel 24V C" to the integrated control terminal strip C" (see wiring diagram in figure 17).

Condensing Unit Wiring

After the condensing unit is installed, field wire the unit as shown in the installation instructions provided with the unit. Use thermostat wire to connect the condensing unit to the zone control panel (see figure 17).

Page 13

HARMONY IIIT ZONE CONTROL SYSTEM

GENERAL

Minimum CFM in Variable Speed Furnace and Air Handlers

Harmony IIIt Zone Control system minimum CFM values for variable speed furnaces are listed in table 6. These apply to furnaces and air handlers with serial numbers indicating they were built in 2004 or later. With furnaces built before 2004, use the Harmony II furnace or air handler’s air handling data.

Zone Control system minimum air note in the installation instructions or engineering handbook for that

CAUTION

This unit is manufactured using unpainted metal. Sharp sheet metal edges can cause injury. When installing the unit, avoid accidental contact with

The control’s surfaces may be hot! Take care when making wiring connections. Failure to do so may result in personal injury.

CAUTION

sharp edges.

Table 6. Minimum CFM for Harmony IIIt Zone Control system with Variable Speed Blower Motors

Unit Model Number

G60DFV−36A−070 426 **SLP98xx070V36B 1/2HP motor 300

G60DFV−36B−090 523 **SLP98xx090V36C 1/2HP motor 250

G60DFV−60C−090 520 **SLP98xx090V48C 3/4HP motor 380

G60DFV−60C−110 475 **SLP98xx090V60C 1HP motor 450

G60DFV−60D−135 477 **SLP98xx110V60C 1HP motor 450

G60UHV−36A−070 426 **SLP98UH135V60D 1HP motor 450

G60UHV−36B−090 453 SL280xxV 3−ton 250

G60UHV−60C−090 478 SL280xxV 4− & 5−ton 450

G60UHV−60C−110 483 EL296xxV 2 & 3−ton 250

G60UHV−60D−135 495 EL296xxV 4−ton 380

G61MPV−36B−045 442 EL296xxV 5−ton 450

G61MPV−36B−070 458 CB31MV−41 380

G61MPV−36B−071 458 CB31MV−51, −65 399

G61MPV−36C−045 442 CBX32MV−018/024, CBX32MV−024/030 Rev 06 300

G61MPV−36C−090 479 CBX32MV−036 Rev 06 300

G61MPV−60C−090 449 CBX32MV−048, −060, −068 Rev 06 300

G61MPV−60C−091 458 **CBX40UHV−024, −030 250

G61MPV−60C−110 463 **CBX40UHV−036 380

G61MPV−60C−111 458 **CBX40UHV−042, −048, −060 450

G61MPV−60D−135 470 CBWMV (all models) 400

**G71MPP−36B−070 250

**G71MPP−36C−090 250

**G71MPP−60C−090 450

**G71MPP−60C−110 450

**G71MPP−60D−135 450

* A 3% duty cycle corresponds to the minimum CFM, and a 97% duty cycle corresponds to the maximum CFM. ** On G71MPP & SLP98 Furnaces and CBX40UHV and CBX32MV revision 06 Air Handlers, listed values in the table corre-

spond to 0% duty cycle of the Harmony IIIt Zone Control system control signal. Since the Harmony IIIt Zone Control system puts 3% at minimum, actual value may be 10−30 CFM higher.

xx: UH = up/horizontal flow; DF = down flow

CFM (min)

Unit Model Number

CFM (min)

505023M 08/11

Page 14

System Flow Diagrams

GENERAL

COOLING

DEMAND

RECEIVED

since completion

of last cooling

Energize stage 1

compressor and

ramp indoor

CFM setting

discharge air

temperature

air lower than

air 7°F or more

above cooling staging jumper

minimum runtime

in 1st stage

5 minutes

demand

Ye s

blower to

Monitor

Discharge

45°F

Discharge

setting

Ye s

4−minute

completed

Ye s

Cooling demand satisfied

Ye s

COOLING

OPERATION

AC/HP

Energize stage 2

compressor and

ramp indoor

blower to

CFM setting

Monitor

discharge air

temperature

Shutdown compressor stage 1 or 2

Continuous air

delivered to

calling zones

Discharge

air rises above

55°F

Ye s

Cooling demand satisfied

Ye s

Discharge

Ye s

air lower than

45°F

Discharge

air below cooling

staging jumper

setting

Ye s

4−minute

minimum runtime

in 2nd stage

completed

Ye s

De−energize

stage 2

Shutdown compres-

sor stages 1 and 2

and blower fan

HEATING DEMAND

RECEIVED

5 minutes

since completion

of last heating

demand

Ye s

Energize (Y1/Y2)

compressor heat

stage and ramp

indoor blower to

CFM setting

Monitor

discharge air

temperature

Discharge

air higher than

Upstage

135°F

Discharge

air below heating

staging jumper

setting

Ye s

4−minute

minimum

stage runtime

completed

Ye s

Was 2nd

stage (Y2)

running

Ye s

Heating

demand

satisfied

Ye s

HP & Electric

Order of Staging:

HP stg 1 (Y1) HP stg 2 (Y2) Elec strip stg 1 (W1) Elec strip stg 2 (W2)

Shutdown all stages com-

pressor /

electric heat

Continuous air

delivered to

calling zones

Discharge

air falls below

130°F

Ye s

Heating

demand

satisfied

Ye s

HEATING

OPERATION

Heat Strips

Energize heat strip

stage (W1/W2) and

ramp indoor blower to

CFM setting

Monitor

discharge air

temperature

Discharge

Ye s

air higher than

135°F

Discharge

air 20°F or more

above heating

staging jumper

setting

Ye s

2−mininute

minimum

stage runtime

completed

Ye s

Was 2nd

stage (W2)

running

Ye s

De−energize

furnace W1 &

Shutdown compres-

sor stages 1 and 2

and blower fan

No Upstage

Page 15

HARMONY IIIT ZONE CONTROL SYSTEM

HEAT PUMP

Installing Heat Pump and accessories

HEAT PUMP

Equipment Installation

Follow all equipment installation instructions provided with each unit.

Pressure Switch

A pressure switch (HFC−22 [27W12]; HFC−410A [27W13]) is required for applications with a Lennox heat pump (Options 2 and 3). This switch acts as a guard in case of high head pressures during 1st− and 2nd−stage heating. The switch’s cut out and cut in points are shown in table 7.

Table 7. Cut−out and Cut−in (Reset) Points

Refrigerant Cut−Out Cut−in (Reset)

HCFC−22 375 psig (2551 kPa) 275 psig (1862 kPa)

HFC−410A 550 psig (3965 kPa) 425 psig (3102 kPa)

NOTE − If a pressure switch is factory installed in the unit, do not remove the switch or switch wires.

The switch may also be fastened directly to the vapor valve service port which becomes the discharge line in heat pump heating mode (see figure 12).

Pressure Switch Wiring

Pull a two−wire thermostat cable from the field-installed pressure switch to the zone control panel and connect at the pressure switch, and at the zone control panel as shown in the connection location diagram (see figure 15).

Tee (High Pressure Switch; Heat Pumps only)

A tee (Lennox #87071) is needed to install the pressure switch along with a valve core (Schrader) for checking pressure in the vapor line during heat pump heating mode (see figure 12).

The switch may also be fastened directly to the vapor valve service port which becomes the discharge line in heat pump mode.

REVERSING

VALV E

VAPOR LINE (TO INDOOR

COIL)

Balance Point Sensor (Outdoor Thermostat)

A balance point sensor (kit 56A87, figure 13) may be implemented in a dual-fuel (Option 3) system. This thermostat monitors the outdoor temperature, compares it to the balance point setting, and signals the zone control if the reading is below the set point. The zone control then instructs the gas furnace to provide all the heating and prohibits the heat pump from attempting to fill a demand for heat.

Figure 13. Balance Point Sensor (56A87)

Defrost Tempering Kit

A defrost tempering kit (67M41) may be implemented in a dual-fuel (Option 3) system. This kit consists of a thermostat probe/switch which is installed between the furnace and the evaporator coil to turn the furnace on (at 80F) and off (at 90F) during a defrost cycle. This tempers the discharge air and protects the compressor from high refrigeration pressures during defrost. Figure 14 shows the kit; see figure 3 (Page 6) for location of the probe.

MOUNTING BRACKET

STRAIN RELIEF

LIMIT CONTROL

WHEN FULLY ASSEMBLED, TABS ARE BENT DOWN TO HOLD CONTROL AND WIRES IN PLACE.

VALVE DEPRESSOR TEE (LENNOX

87071)

NEW SERVICE

PORT

CAUTION − High Pressure Switch must be installed on open side of tee first to prevent refrigerant loss.

HIGH PRESSURE SWITCH

Figure 12. Tee & Vapor Line High Pressure

Switch

505023M 08/11

LABEL

Figure 14. Defrost Tempering Limit Control

Page 16

HEAT PUMP

PRESSURE SWITCH

21J18 (HFC−22)

27W13 (HFC−410A

DAMPERS (Spring open, power close)

Heat/cool staging

jumper settings −

page 10.

DISCHARGE AIR SENSOR 88K38 (included)

Connections for REMOTE VACATION SWITCH OR Humiditrol® Zoning Accessory

Vacation OFF for individual

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).

NOTE: SELECT # OF HP STAGES BY PLACING JUMPER IN APPROPRIATE POSITION. (2−STG HP SHOWN)

zone control.

Air reduction

jumper settings

− page 9.

See System Configuration & E−Heat jumper settings − page 11.

PIAB jumper settings − page 8.

System Configuration & E−Heat

jumper settings − page 11.

IMPORTANT! Connectivity is NOT COMPLETE until all electrical adjustments (jumpers and wiring changes) have been made. See Air Handler Control Electrical Adjustments (Page 39).

Thermostat 2 Thermostat 1

W C Y G R

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.

CONNECT TO THE

SAME POWER

SUPPLY AS THE AIR

HANDLER

VAC

ZONE CONTROL

TRANSFORMER

IMPORTANT

Connect thermostat-gauge wire to C" terminal on Heat Pump terminal strip

HEAT PUMP

IMPORTANT!

DO NOT MAKE

CONNECTIONS

TO Y1 AND Y2

SPEED AIR

240 VAC

R C Y1 Y2 O W1

NOTE BELOW!

R G W1 W2 C DS Y1 Y2

VARIABLE

HANDLER

SEE IMPORTANT

Figure 15. Harmony IIIt Zone Control System Option 2 − Lennox Heat Pump & Lennox Variable-Speed Air Handler

Page 17

HARMONY IIIT ZONE CONTROL SYSTEM

HEAT PUMP

Heat Pump System Start−Up & Checkout

IMPORTANT

The zone control system power−up must occur at the same time or before the furnace or air handler unit is powered up.

Powering the System (All Systems)

1. Adjust all thermostat settings so that no demand will occur.

2. Apply power to the zone panel transformer and to the air handler and observe the following: all four diagnostic LEDs will light; then each individual diagnostic LED will light in sequence; then all four diagnostic LEDs will light and extinguish.

3. Finally, the status light will begin to flash, indicating proper operation. Perform heat pump heating checkouts on pages 18 through 19.

Heat Pump Heating Checkout (Single Zone)

Prerequisites:

Zone 1 thermostat set to Heat

PRESSURE SWITCH LED ON

DAMPER 2,3,4 ON

DAMPER 1 OFF

ELECTRIC HEATING ON (W/EVENT 3)

(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

FAN ON

HEATING ON

OUTPUT STATUS LEDs

1. Set zone 1 thermostat for a heat demand; check:

D Zone 1 thermostat W LED on (heating demand). D Damper LED 1 off (damper open). D Damper LEDs 2, 3, and 4 on (dampers closed). D Output Heat Y1 LED on (compressor on). D Heating LED on. D Fan LED on. D Pressure Switch LED on.

The compressor in the outdoor unit begins operating in the heating mode. At approximately the same time, the indoor blower starts, operating at a speed according to the setting of the PIAB jumper for zone 1. It may take the blower 60 to 90 seconds to reach this speed.

2. If Single-Stage Heat Pump − Skip to step 3. The dis-

charge air sensor continually samples air temperature. If, after 4 minutes, air temperature is not warming significantly, the high speed compressor energizes.

D Output Heat Y2 LED on (high speed compressor).

3. The discharge air sensor continually samples air temperature. If, after (another) 4 minutes, air is not warming significantly, auxiliary heat sequence begins:

D Electric Heating (E−Heating) LED on. D Output Heat W1 on, followed by (if available, and if

necessary) W2, and then W3.

4. Remove heat demand from zone 1.

D All LEDs off, except: D Damper LEDs 2, 3, 4 on.

To check the amount of air being delivered to each zone and to confirm that each individual zone damper functions properly, repeat these steps for zones 2 − 4.

505023M 08/11

Page 18

+ 42 hidden pages

Lennox Harmony III Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual