Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS E2006 Lennox Industries Inc. Dallas, Texas, USA ® Harmony II Zone Control System Zone System CONTROLS Control Center 502,861M Litho U.S.A. (cover removed) 06/06 Supersedes 02/2000 Table of Contents Introduction ........
Page 2: Introduction
Operating the zone control system is simple. The user oper- nox single− or two− speed heat pump or air conditioner. ates the system with the control panel and the zone thermo- Option 3 − G32V/G21V/GSR21V series furnace, a Lennox ® stats. The Harmony...
Page 3: Residential Zone Control System Dimensions
® Harmony II Zone Control System Dimensions Control Panel Inches (mm) Control Center (254) MOUNTING BASE (10) (16) (25) (25) (25) 1-5/16 (25) 1-3/4 (33) (44) Top View Top View ELECTRICAL INLETS (Top and Bottom) MOUNTING KEYHOLE SLOTS (4) (254) 4-3/4 (121) 5/16...
Page 4: Gas Heat/Condensing Unit Systems
® Harmony II Residential Zone Control System − Component Selection (Gas Heat/Condensing Unit Systems) UP-FLOW SINGLE SPEED UP-FLOW CONDENSING UNIT FURNACE TWO ZONES HS26 G21V SERIES HS27 START HS29 G32V SERIES 10ACB W/ EVAP. COIL G32V Only TEMPERATURE HEAT/ CONTROL MODULATION CONDENSING CENTER...
Page 5: Heat Pump (Hp) System
® Harmony II Residential Zone Control System − Component Selection (Heat Pump Systems) SINGLE SPEED OUTDOOR UNIT HP26 TWO ZONES HP27 HP29 10HPB MULTI-POSITION START 12HPB MULTI-POSITION PRESSURE CONTROL HEAT PUMP BLOWER COIL SWITCH CENTER SYSTEM CB31MV SERIES (21J18) (16J95) TWO-SPEED OUTDOOR UNIT HP21...
Page 6: Gas Heat/Hp Sys. W/Fm21 Heat Pump Control
® Harmony II Zone Residential Control System − Component Selection (Gas Heat/Heat Pump Systems With FM21 Heat Pump Control) DEFROST AIR TEMPERING UP-FLOW MODULE FURNACE (16J93) G21V SERIES G32V SERIES W/ EVAP. COIL G32V Only START SERVICE TEMPERATURE FM21 HEAT GAS HEAT/ LIGHT MODULATION...
Page 7: System Components
Pressure Switch A pressure switch is required for ap- or Gas plications with a Lennox heat pump (Options 2 and 3). The pressure switch acts as a safety device in case of high head pressures during first− and second−stage heating.
Page 8: System Design Guidelines
Occupancy System Design Guidelines A single structure contains different types of living spaces. Without zoning, it is difficult to condition those areas so that ® everyone will be comfortable. Zoning a home or office al- Designing a duct system for a Harmony II zoning applica- lows the user to control the zones which need to be condi- tion is similar to non−zoned duct design, but with a few extra...
Page 9 Typical Reduced Radial Zone Duct Design Back Door Bedroom Kitchen Bath #1 Bedroom Laundry Zone Room Dampers Zone 4 Zone 4 Thermostat Return Register Zone 3 Thermostat Furnace Zone 3 Return Register Bath #1 Zone 1 Zone Control Return Register Zone Panel Dampers...
Page 10: Heat/Cool Equipment Options & Installation
Lennox Heat Pump Unit Heat/Cool Equip. Options & Installation Any Lennox heat pump unit may be used with the Harmo- ® II zone control system. If a single−speed heat pump is Option 1 − Gas Furnace (with VSM) & Condens- used, only two zones are allowed.
Page 11: Ii Control Center
Rectangular and round damp- area, such as a closet, but where the temperature will not ers are available from Lennox in sizes ranging from 6 inch- exceed 130_F. A convenient, central location is necessary es (152mm) to 14 inches (357mm) (round) and 10 inches...
Page 12: Blower Speed Adjustments
1− Determine the minimum system CFM requirements. Blower Speed Adjustment This is the CFM for the smallest zone. The G21V and GSR21V furnace, and the CB31MV blower 2− From the Blower Motor Performance table determine coil unit are equipped with a variable speed blower motor. The the LOW Speed (cool and heat) jumper setting corre- blower motor speed must be adjusted to produce the zoning sponding to this CFM.
Page 13 VSP2−1 VARIABLE SPEED CONTROL BOARD SELECTIONS HIGH Speed 13 PIN PLUG MAXIMUM CFM HIGH ADJUST HEAT (BOARD TO MOTOR) SELECTION TEST − PRIMARY LIMIT TRIPPED CFM NORM LOW Speed MINIMUM CFM HTG. OPERATIONAL HEAT HI/LOW SELECTION BLOWER SELECTOR PINS Affects both High and Low CFM ON/OFF POSITION 2...
Page 14 ® Lennox Harmony II Control Center Terminal Connections and Jumper Blocks 2 AMP TROUBLESHOOTING INDOOR UNIT CONNEC- SLOW BLOW FUSES INDOOR UNIT DIAGNOSTIC TIONS TRANSFORMER (G32V/G21V/GSR21V RED LIGHTS DAMPER RIES OR CB31MV SERIES) (4−LEDs) AIR SELECTION TRANSFORMER 24VAC CONNECTION DIAG...
Page 15: Control Center Jumper Settings
5. Set the air selection jumper pin for the zone using the Figure 9 percent air determined in step 4. If the percent air falls between available jumper settings, select the next Additional jumpers are available from Lennox as part highest setting. #38L94. 6. Repeat steps 1−5 for each zone.
Page 16 Pulse Width Modulation (PWM) Multiplier Chart 0.90 REDUCTION (Cooling) 0.80 20 % REDUCTION (Heating) 0.70 Note − For 75 % reduction use minimum 0.60 40 % EXAMPLE 2 part 2 0.50 REDUCTION (Heating) 0.40 EXAMPLE 2 part 1 0.30 50 % EXAMPLE 1 REDUCTION (Continuous Air)
Page 17 Continuous Air Reduction Jumper 3. Determine total unit available CFM Total unit available CFM = PWM Multiplier x (Max CFM − Min. During continuous fan mode with no heating or cooling de- CFM) + Min. CFM. mand, the blower runs at the total percentage of the CFM jumpers which cannot exceed 100% of blower capacity.
Page 18: Common System Component Wiring
Outdoor Unit Jumper Position the outdoor unit jumper OUTDOOR 1 SPD according to the speed of the out- UNIT 2 SPD Control door unit. For single−speed units, Center Figure 15 place jumper on 1 SPD; for two− speed units, place jumper on 2 SPD.
Page 19: Component Specific Wiring
TRANSFORMER RATING SHOULD BE SIZED TO ADE- QUATELY HANDLE ZONE DAMPERS (1−4) PLUS RELAYS (K1−K4) NOT TO EXCEED CLASS II WIRING LIMIT OF 70 COMBINED LOAD OF ZONE DAMERS AND ZONE RE- LAYS NOT TO EXCEED 2 AMPS. Figure 19 Discharge Air Temperature Probe Wiring Component Specific Wiring Wire discharge air temperature probe to control center us-...
Page 20 Option 2 − CB31MV Series Blower Coil Unit & Lennox Temperature Modulation: Switch Installation & Wir- Heat Pump & ing (G32V only) Option 3 − G32V/G21V/ GSR21V Series Gas Furnace, Install temperature modulation switch in the supply air Lennox Heat Pump & FM21 plenum so that the probe is in the air stream.
Page 21 After you have installed complete, field wire unit as shown in installation instruc- the Lennox FM21 control system, field wire the unit as tions provided with the unit. shown in figure 25. Use thermostat wire to connect the heat ®...
Page 22: Option 1 Field Wiring Diagram
Option 1 − Harmony Zone Control Center Field Wiring with G32V/G21V/GSR21V Series Furnace and Lennox Condensing Unit INDOOR UNIT DAMPER TRANSFORMER DAMPER TRANSFORMER TRANSFORMER SELECTION 24VAC 120 VAC DIAG THERMOSTATS DAMPERS DIAG DIAG DIAG G32V ONLY* TEMP. MODULE SWITCH Fan line...
Page 23: Option 2 Field Wiring Diagram
Option 2 − Harmony Zone Control Center Field Wiring with CB31MV Blower Coil Unit and Lennox Heat Pump or GAS Figure 24 Page 23...
Page 24: Option 3 Field Wiring Diagram
Option 3 − Harmony Zone Control Center Field Wiring with G32V/G21V/GSR21V Furnace, Lennox Heat Pump, and FM21 Control Figure 25 Page 24...
Page 25 Option 1 − Harmony Zone Control Center Field Wiring in Economizer Applications with G32V, G21V/GSR21V Series Furnace and Lennox Condensing Unit G32V ONLY* *K43 (LINE VOLTAGE) 24V (T1) K43−1 TEMP. MODULE SWITCH Fan line Fan low *G32V only NOTE − HEATING BLOW- ER JUMPER MUST BE ON SETTING 2.
Page 26: Opt. 2 W/Economizer Option Field Wiring Diagram
Option 2 − Harmony Zone Control Center Field Wiring in Economizer Applications with CB31MV Blower Coil Unit and Lennox Heat Pump G21V or GAS K20−2 PINK GRAY YELLOW BLUE K18−2 *K18 *K18 RELAY FIELD−PROVIDED J3 P4 Figure 27 Page 26...
Page 27: System Operation
When the emergency heat switch is turned on (any System Operation zone thermostat), the auxiliary source is used to satis- ® fy heating demand in that zone. This section describes how to operate the Harmony II con- trol panel and how the system reacts to each operation. Table 2 A−Zone Thermostats ®...
Page 28 Auto Changeover Mode to heating or cooling demands only from the master ther- mostat. All dampers remain open and the blower operates When Auto mode is selected at the control panel, the at full speed (minus the amount selected by the heating air zone control system can respond to both heating and reduction jumper).
Page 29: System Lights
noting a W1 (heating demand) and yellow − noting a O (re- System Lights versing valve) demand. These LEDs are labeled accord- ing to the zone and demand. For example, a lit LED la- The following section describes how to use the control pan- beled 3Y would indicate there is a call for compressor in el and the control center lights to do the following: zone 3.
Page 30: Time Delays
Each time the button is single clicked, the display will Table 4 toggle back and forth between the two error codes and re- Time Delays fresh the 10 second display timer. Delay Time Function Before leaving the job site, you must erase the stored error Gas Furnace only.
Page 31 4− The control center will start the furnace blower on low Gas Central Control Heating speed (25% air) 45 seconds after the combustion Press the central control and fan auto switches on the cycle has begun. When warm air is sensed by the dis- system control panel.
Page 32 The discharge air sensor will sample the discharge air Initiate a heating demand (and auxiliary heating de- temperature. If, after 4 minutes, the discharge air tem- mand) from master thermostat. perature has not begun to warm significantly, high Input LED Y1 on. (Heat input demand) speed compressor will be energized.
Page 33 The condensing unit will be in low speed and the in- The discharge air temperature probe serves several pur- door blower will be operating at a speed equivalent to poses: the setting of the zone 1 CFM jumper. It may take the In cooling systems (and heat pump systems in cooling blower 60 to 90 seconds to reach this speed.
Page 34: Troubleshooting
H−Pressure Switch Checkout (Heat Pump lem (error condition), it will turn on one or more of the diag- nostic LEDs in the zone control center and may flash the Systems Only) service alert LED in the zone control panel. The high pressure switch is a normally closed (N.C.) auto-re- Decoding the Light Patterns set high pressure limit located in the compressor discharge line.
Page 35 Table 7 LED Display Fail safe Fail-safe Error Diags (System Shut Remedy Service Light Description (Control Center) Down) (Control Panel) Code #1 DIAG Internal DIAG Circuit Board Replace Control Center. Failure DIAG DIAG FLASHING Code #2 DIAG Unsteady Input Disconnect thermostats, pressure switch and control panel DIAG or Cycling Input one at a time until error goes away.
Page 36 Table 8 LED Display Fail safe Fail-safe Error Diags Remedy (System Shut Service Light Description (Control Center) Down) (Control Panel) Code #8 1) Air selected for fewer than two zones or DIAG 2) No air is selected for zone 1 or 3) If a zone air selection jumper is left off of a zone that issues DIAG a heat or cool demand.
Page 37 Table 9 LED Display Fail-safe Fail-safe Error Diags (System Shut Remedy Service Light Description (Control Center) Down) (Control Panel) If service alert light is flashing*: 1) Cooling equipment has failed to cool sufficiently after 4 min- utes, check outdoor equipment. Code #13 2) Discharge probe has failed, replace probe.
Page 38 ® Option 1 − System Troubleshooting − Harmony II Zone Control with G32V/G21V/GSR21V and Condensing Unit This troubleshooting diagram lists common trouble spots. Rather than providing solutions, this diagram asks questions about the hookup and operation of system equipment. Good troubleshooting skills and information provided elsewhere in this manual are necessary. n Are jumpers set correctly? n Only one jumper is allowed n Are thermostats wired correctly?
Page 39 ® Option 2 − Troubleshooting Harmony II Zone Control with Lennox Heat Pump This troubleshooting diagram lists common trouble spots. Rather than providing solutions, this diagram asks questions about the hookup and operation of system equipment Good troubleshooting skills combined with information provided elsewhere in this manual are necessary.
Page 40 ® Option 3 − Troubleshooting Harmony II Zone Control with FM21 This troubleshooting diagram lists common trouble spots. Rather than providing solutions, this diagram asks questions about the hookup and operation of system equipment. Good troubleshooting skills combined with information provided elsewhere in this manual are necessary. S Line voltage to transformer? S Error code present? S 24VAC from transformer to control center?
Page 41 ® Option 3 − Troubleshooting Harmony II Zone Control with FM21 (Cont’d) This troubleshooting diagram lists common trouble spots. Rather than providing solutions, this diagram asks questions about the hookup and operation of system equipment. Good troubleshooting skills combined with information provided elsewhere in this manual are necessary. S Is outdoor (balance point) thermostat S Is discharge probe (DT1) installed? S Probe should be located between coil and fur-...

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