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3.2. Furnace Variable Speed Motor Electrical

Adjustments

NOTE:

Follow all equipment installation instructions provided with each unit.

The variable-speed motor (VSM) in the furnace is controlled by the integrated

furnace control (IFC). Adjustment of these drive controls is made by cutting the

clippable on-board links and selecting DIP switch settings. This is described in the

following paragraphs.
• The furnace blower motor speed must be adjusted to produce the zoning CFM

requirements managed by the zone control system.

• The Harmony III zoning system control’s pulse width modulated (PWM) output

signal is connected to the DS terminal on the furnace control. The PWM signal,

along with any other thermostat request (

, or

), controls fan speed

linearly between the minimum and maximum CFM for the furnace as determined

by the cool speed DIP switches (see SLP98 Installation Instructions for settings).

• Locate the integrated control in the furnace control box area. Before connecting

the zone control panel to the integrated control, complete the applicable electrical

adjustments shown in the following figures.

W915 2 Stage Compr (Y1 to Y2)—DO NOT CUT
W951 Heat Pump (R to O)—DO NOT CUT
W914 Dehum - Harmony (R to DS)—CUT IN ALL CASES

EAC

HUM

ON-BOARD LINKS:

Electrical Adjustments

In all cases

—cut the clippable on

‐

board link W914 Dehum - Harmony

(between R and DS, see figure 18); if not cut, the zone control panel

DS fuse will blow.

tween Y1 and Y2).

Do NOT cut any wires in the variable speed motor harness.

Figure 23. Typical Furnace VSM Electrical Adjustments

Set the upper limit of blower CFM as follows:

Determine the maximum system CFM requirements (sum of all the individual

zones).

From the Blower Motor Performance tables (see furnace Installation Instructions)

determine the HIGH speed cool DIP switch setting that corresponds to this

CFM.

Set the HIGH speed cool DIP switch setting on the integrated control to this

value.

NOTE:

The lower limit of blower CFM is factory set. It is not field adjustable.

The minimum airflow achieved by the any of the gas furnaces when connected to a

Harmony III zoning system control listed in “Minimum CFM for Harmony III zoning

system with Variable Speed Blower Motors (Gas Furnaces)” on page 16. A 3%

duty cycle corresponds to the minimum CFM, and a 97% duty cycle corresponds

to the maximum CFM.

NOTE:

Any on/off delays present for a heating or cooling sequence are still present

with Harmony III zoning system control operation.

3.3. Variable Speed Motor Furnace System Operations

The dehumidification on-board clippable link W914 Dehum - Harmony (R to DS) on

the integrated furnace control must be cut for operation with the Harmony III zoning

system control. Once the link is cut, the presence of the Harmony III™ zoning

system, versus a standard dehumidification control, is automatically detected by

the integrated control.

IMPORTANT

DO NOT alter blower harness!

3.3.1. Operation

When the integrated control is properly connected to a Harmony III zone control,

operation is as follows:
•

Integrated control DIP switches 1 and 2, which configure the control for operation

with various types of thermostats, are ignored.

• The zone control sends a

Signal to the furnace which goes through its normal

ignition sequence as described in the furnace installation instructions.

• The blower will start and operate at the minimum blower speed after a 45 second

delay.

• After the temperature of the DAS rises above 100ºF the zone control will provide

a PWM signal to the furnace on terminal

based upon the Zone PIAB Jumper

selections (and the heating air reduction jumper).

• The blower speed (CFM) is set according to the pulse width modulated (PWM)

signal from the Harmony III zoning system control.

• The blower speed adjusts immediately with PWM adjustments.
•

The furnace firing rate is based on current operating CFM and internal lookup

table for midpoint temperature rise. If resulting firing rate is below minimum firing

rate, it will operate at minimum fire rate. Accordingly, if resulting firing rate is

above maximum firing rate, it will operate at maximum firing rate.

• Firing rate adjusts anytime the PWM deviates by more than 5% (e.g. 60% >

65%).

NOTE:

Integrated control DIP switches 14 through 19 are not disabled, and can

be used in conjunction with Harmony III zoning system to increase or

decrease airflow volume during heating operation.

NOTE:

DIP switches 14-19 adjust firing rate when Harmony III zoning system

is detected. Air volume is controlled by Harmony III zoning system. The

Содержание Harmony III

Страница 1: ...HARMONY III zoning system X9953 Installation Setup and User Guide 507936 01 6 2021 Supersedes 7 2019 2021 Lennox Industries Inc Dallas Texas USA...

Страница 2: ...urnace 26 3 1 Typical Wiring for Variable Speed Gas Furnace and Outdoor AC Unit Option 1 26 3 2 Furnace Variable Speed Motor Electrical Adjustments 27 3 3 Variable Speed Motor Furnace System Operation...

Страница 3: ...3 3 Cooling Only or Cooling with Hot Water Coil Non Heat Pump 46 5 Dual Fuel Option 3 48 5 1 Zone Control System Wiring Option 3 48 5 2 Dual Fuel System Start Up Defrost Temperating Sensor Placement a...

Страница 4: ...E Due to Lennox ongoing commitment to quality features and options are subject to change without notice and without incurring liability Improper installation adjustment alteration service or maintenan...

Страница 5: ...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 h...

Страница 6: ...anel 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 requi...

Страница 7: ...r unequal size Table 7 Indoor Outdoor Options Options Indoor Unit Outdoor Unit 1 Any Lennox Gas Furnace with VSM only Lennox Air Conditioner unit as described in Table 8 Lennox AC or Heat Pump Units 2...

Страница 8: ...other room in the house where the humidity would typically be much higher than the rest of the house Is NOT in any part of the building where the temperature may exceed 150 F 1 9 3 Thermostats Identif...

Страница 9: ...STAGING JUMPERS CONTINUOUS AIR REDUCTION JUMPERS HEATING AIR REDUCTION JUMPERS PIAB JUMPERS SYS CONFIG AND E HEAT JUMPERS Figure 6 Zone Control Panel Jumper Banks CAUTION Static electrical discharge...

Страница 10: ...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 CONTINUO...

Страница 11: ...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 co...

Страница 12: ...40 F NOTE Note the 140F DAS jumper s impact on the differential at 120 and 130 settings 1ST STAGE 2ND STAGE 2ND STAGE Discharge Air Temperature F 1 10 8 2 Cooling Staging Temperature Jumper Cooling St...

Страница 13: ...ol 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 ap...

Страница 14: ...temperature probe is not polarity sensitive 1 12 Component Specific Wiring CHECK VOLTAGE BEFORE CONNECTING ZONE CONTROL TRANSFORMER ZONE CTRL XFMR LEADS TO THE ZONE CONTROL PANEL CONNECTIONS VERSED SW...

Страница 15: ...l 24VAC C terminal and R wire to R terminal 1 12 2 Thermostat Using standard electronic 1 heat 1 cool non heat pump non power robbing thermostats and five wire thermostat cable wire units as follows 1...

Страница 16: ...V60C 450 SL280UH080NV60C SL280UH100NV60C 450 SL280UH070V36A SL280UH090V36B 250 SL280UH090V48B 380 SL280UH090V60C SL280UH110V60C 450 Table 12 Minimum indoor variable speed blower CFM per model number A...

Страница 17: ...Operations AC HP Shutdown all pressor electric heat Continuous air delivered to calling zones Discharge air below heating staging jumper setting 4 minute minimum stage runtime completed 5 minutes sinc...

Страница 18: ...stage down and turn off if the switch does not close within 90 seconds Afterwards backup heat will be used to satisfy the demand 5 Remove the restriction When hot gas pressure drops below the close o...

Страница 19: ...at 90 F during a defrost cycle This tempers the discharge air and protects the compressor from high refrigeration pressures during defrost The following figure show the defrost temperating kit compon...

Страница 20: ...HFC 410A W C Y G R W C Y G R IMPORTANT VARIABLE SPEED AIR HANDLER HEAT PUMP System Configuration E Heat jumper settings CONNECT TO THE SAME POWER SUPPLY AS THE AIR HANDLER ZONE CONTROL TRANSFORMER Con...

Страница 21: ...t zone 1 thermostat for a heat demand check Zone 1 thermostat W LED on heating demand Damper LED 1 off damper open Damper LEDs 2 3 and 4 on dampers closed Output Heat Y1 LED on compressor on Heating L...

Страница 22: ...r settings for all zones It may take the blower 60 to 90 seconds to reach this speed 2 If Single Stage Heat Pump skip to step 3 The discharge air sensor continually samples air temperature If after fo...

Страница 23: ...ompressor At approximately the same time the indoor blower starts operating at a speed according to the PIAB jumper settings for all zones It may take the blower 60 to 90 seconds to reach this speed 2...

Страница 24: ...g Heating Defrost Emer Heating mand changes If no does DS output vary from 0 to 25VDC Line Voltage to transformer 24VAC from transformer to zone control panel Are all wire connections good Are all wir...

Страница 25: ...in delay complete No Continuous air delivered to calling zones ORDER OF STAGING HP stg 1 Y1 HP stg 2 Y2 Elec strip stg 1 W1 Elec strip stg 2 W2 ture at which the heat pump electric heat is allowed to...

Страница 26: ...o integrated control C terminal Thermostat 2 Thermostat 1 W C Y G R W C Y G R Variable Speed Furnace 2 Stage Condensing Unit shown No Y2 wire on 1 Stage Unit NOTE Do not wire Y wire s from the furnace...

Страница 27: ...ny III zoning system with Variable Speed Blower Motors Gas Furnaces on page 16 A 3 duty cycle corresponds to the minimum CFM and a 97 duty cycle corresponds to the maximum CFM NOTE Any on off delays p...

Страница 28: ...zoning system control board W2 connection from Harmony III zoning system to SLP98 is optional see Harmony III zoning system furnace installation instructions for details DIP switch settings ON or OFF...

Страница 29: ...er C No connection to Y1 or Y2 on indoor unit Outdoor Unit Wiring Completed Thermostat and damper wiring completed Discharge Sensor wired to Harmony III zoning system 3 3 3 2 SL280V SL280NV EL296V and...

Страница 30: ...3 and 4 each have their own thermostat Thermostats may be standard or auto changeover type Heat and cool demands present at the same time from different zones opposing demands are satisfied on a firs...

Страница 31: ...ntrol checks the discharge air sensor for proper temperature If measured temperature is 7 F or more above the cooling staging jumper setting then Y2 energizes if available If both stages of cooling ar...

Страница 32: ...to match condenser 1 or 2 stage 9 Stages Circle one 2HP 1HP Ignored for gas heat non heat pump application 9 E HEAT Stages Circle one DF 1 2 3 Ignored for gas heat non heat pump application 9 Desired...

Страница 33: ...t demand check Zone 1 thermostat W LED on heating demand Damper LED 1 off damper open Damper LEDs 2 3 and 4 on dampers closed Output Heat W1 LED on furnace on Heating LED on The furnace begins ignitio...

Страница 34: ...ed by the discharge air sensor the fan LED comes on and the blower will slowly increase to speed required by the zones calling The blower operates at a speed equivalent to the sum of all zone PIAB jum...

Страница 35: ...control system will start the furnace blower on low speed 0 PIAB air 45 seconds after the combustion cycle has begun 3 When 100 F warm air is sensed by the discharge air sensor the fan LED will light...

Страница 36: ...in response to demand ergize appropriate outputs ing er to R puts Does blower speed change as zone demand changes If no does DS output vary from 0 to 25VDC Line Voltage to transformer 24VAC from trans...

Страница 37: ...all wire connections good Are all wire connections correct No pressure Switch should be installed DAMPERS 120 VAC 24 VAC Thermostat 2 Thermostat 1 W C Y G R DISCHARGE AIR SENSOR THERMOSTATS Y1 Y2 C R...

Страница 38: ...l heat stages Is discharge air at upper limit Does discharge air temp meet heating staging differential Is discharge air at upper limit Heating demand satisfied Heating demand satisfied Heating demand...

Страница 39: ...rs GAS 1COOL or 2COOL Others do not matter As applicable cut jumpers and harness wires HEATING ONLY NOTE JUMPER between RC and RH must be in place on the control Y1 Y2 C R R G W1 W2 C DS Y1 Y2 Y1 Y2 O...

Страница 40: ...Air Handler Control CBX32MV revision 06 and CBX40UHV 4 2 2 Non Communicating Indoor Control These air handler blower motors are controlled by the BDC3 drive control CFM adjustment Is by jumper setting...

Страница 41: ...oved and connected to the G pigtail Tape off end of wiring going to the circuit board jack plug If this wire is not removed the DS signal from the Harmony III zoning system control will not be able to...

Страница 42: ...AB Jumpers 140 F DAS on page 10 9 Cooling staging jumper Circle one 50 55 60 Select desired discharge air temp during cooling 9 Cont Air Reduction jumper Circle one 0 25 50 75 Percentage airflow reduc...

Страница 43: ...blower ramping Ignored by Harmony III zoning system Panel Setup 9 Heating staging jumper Circle one 85 90 100 110 120 130 Recommended 120 deg F 9 Zone 1 PIAB 140F DAS jumper in place Circle one Yes No...

Страница 44: ...e 10 9 Cooling staging jumper Circle one 50 55 60 Select desired discharge air temp during cooling 9 Cont Air Reduction jumper Circle one 0 25 50 75 Percentage airflow reduction for continuous fan ope...

Страница 45: ...g blower ramping Ignored by Harmony III zoning system Panel Setup 9 Heating staging jumper Circle one 85 90 100 110 120 130 Recommended 120 deg F 9 Zone 1 PIAB 140F DAS jumper in place Circle one Yes...

Страница 46: ...jumper Circle one 0 25 50 75 Percentage airflow reduction for continuous fan operation 9 Heating Air Reduction jumper Circle one 0 20 40 Percentage air flow reduction for heating mode 9 System Configu...

Страница 47: ...Circle one Yes No See 1 10 4 Zone 1 PIAB Jumpers 140 F DAS on page 10 9 Cooling staging jumper Circle one 50 55 60 Select desired discharge air temp during cooling 9 Cont Air Reduction jumper Circle...

Страница 48: ...be conditioned at the same time Emergency Heat OFF to allow Heat Pump to provide heat Emergency Heat ON to force vide all heating disallows heat pump from providing any heat R C Y1 Y2 O W1 R G W1 W2 C...

Страница 49: ...c LEDs will light and extinguish 3 Finally the status light will begin to flash indicating proper operation Perform the gas heating checks using the information in the following sections 5 2 2 Defrost...

Страница 50: ...ace begins ignition sequence after zone 1 has demanded heat The zone control system will start the furnace blower on low speed 0 PIAB 45 seconds after the combustion cycle has begun 2 When 100 F warm...

Страница 51: ...a heat demand is detected The zone control system will start the furnace blower on low speed 0 PIAB 45 seconds after the combustion cycle has begun 2 When 100 F warm air is sensed by the discharge air...

Страница 52: ...ff damper open 2 The furnace will begin its ignition sequence after Zone 1 has demanded heat The zone control system will start the furnace blower on low speed 0 PIAB air 45 seconds after the combusti...

Страница 53: ...VDC Line Voltage to transformer 24VAC from transformer to zone control panel Are all wire connections good Are all wire connections correct Pressure Switch installed in correct position Does switch op...

Страница 54: ...ce Hold dampers open for 3 minutes Discharge air DAS above 100 F No Yes Yes No Is discharge air at upper limit De energize W1 W2 furnace Is discharge air at upper limit Does discharge air temp meet he...

Страница 55: ...ing zones Yes No No Heat pump locked out see NOTE Yes No Monitor discharge air temperature 5 min delay complete Yes No System in 3 hr backup heat mode Yes No Discharge air DAS above 135 F 3 minute min...

Страница 56: ...ignored by Harmony III zoning system 10 OFF 11 OFF DIP switches 11 and 12 determines heating blower speed and is ignored by Harmony III zoning system 12 ON Panel Setup Heating staging jumper Circle o...

Страница 57: ...s low fire minimum capacity firing rate default setting shown and is recommended starting point 15 OFF 16 OFF 17 OFF DIP switches 17 18 and 19 sets high fire 100 capacity firing rate default setting s...

Страница 58: ...ed set DIP switches 11 12 and 13 to OFF Factory Default 12 OFF 13 OFF 14 OFF DIP Switches 14 and 15 Continuous blower speed set DIP switches 14 and 15 to OFF 38 of High Cool Speed Factory Default 15 O...

Страница 59: ...trol panel and near connection terminals These red LEDs indicate the output status of dampers furnace outdoor unit etc When an output is powered or active the corresponding LED is illuminated 4 Pressu...

Страница 60: ...e sure steady state is reached before staging Compressor Off Time 5 min At end of demand Equalizes pressure in refrigerant system and prevents short cycling Heat Staging electric 2 min Between staging...

Страница 61: ...nal on the zone control panel While not a precise measurement the voltmeter fluctuation indicates that the blower speed is changing 1 Connect electronic voltmeter between DS and any C terminal on the...

Страница 62: ...hermostat is making intermittent contact and needs attention The offending thermostat will be ignored for four minutes after the zone control system detects the problem After four minutes if the signa...

Страница 63: ...actual CFM delivered to each zone will be determined by the zone control system settings blower motor control board settings zone thermostat demand status calling for heating cooling continuous fan or...

Страница 64: ...ses 100 Heating PIAB Formula Total PIAB x 1 Heating air reduction setting 2 Then find Heating PIAB Total PIAB from step 1 1 00 1 Heating air reduction setting 1 00 20 x 80Total Heating PIAB 80 Total H...

Страница 65: ...Zone 1 CFM Required Minimum Maximum Minimum ZONE 1 PIAB x 100 0 0 1 x B A I P 1 E N O Z 0 0 1 x B A I P 1 E N O Z Zone 2 CFM Required Minimum Maximum Minimum ZONE 2 PIAB x 100 0 0 1 x B A I P 2 E N O...

Страница 66: ...9 CFM 55 F TR Output BTU 35 000 589 CFM 55 F TR Output BTU 35 000 Example CFM For Harmony III 565 CFM 40 F TR Output BTU 24 430 559 CFM 40 F TR Output BTU 24 000 810 CFM 40 F TR Output BTU 35 000 810...

Страница 67: ...Output BTU 41 000 848 CFM 60 F TR Output BTU 55 000 848 CFM 60 F TR Output BTU 55 000 Factory CFM 740 CFM 35 F TR Output BTU 28 000 850 CFM 45 F TR Output BTU 41 000 965 CFM 53 F TR Output BTU 55 000...

Страница 68: ...del Low Nox SL280UH070XV36A SL280UH090XV48B SL280UH090XV60C Minimum CFM 589 CFM 55 F TR Output BTU 35 000 791 CFM 55 F TR Output BTU 47 000 791 CFM 55 F TR Output BTU 47 000 791 CFM 55 F TR Output BTU...

Страница 69: ...55 F TR Output BTU 46 000 993 CFM 55 F TR Output BTU 59 000 Factory CFM 860 CFM 38 F TR Output BTU 35 000 1 075 CFM 40 F TR Output BTU 46 000 1 245 CFM 34 F TR Output BTU 46 000 1 325 CFM 41 F TR Out...

Страница 70: ...ut BTU 44 800 688 80 F TR Output BTU 59 500 787 CFM 70 F TR Output BTU 59 500 805 CFM 70 F TR Output BTU 60 900 Maximum CFM 1 185 CFM 50 F TR Output BTU 64 000 1 312 CFM 60 F TR Output BTU 85 000 1 57...

Страница 71: ...ail at CFM Zoning 553 CFM 75 F TR Output BTU 44 800 726 CFM 75 F TR Output BTU 58 800 787 CFM 70 F TR Output BTU 59 500 787 CFM 70 F TR Output BTU 59 500 Maximum CFM 1 185 CFM 50 F TR Output BTU 64 00...

Страница 72: ...mum CFM 180 CFM Per Ton 270 CFM 360 CFM 450 CFM 540 CFM Recommend CFM 300 CFM Per Ton For Zoning 450 CFM 600 CFM 750 CFM 900 CFM CFM 400CFM Per Ton 600 CFM 800 CFM 1 000 CFM 1200 CFM Size 3 5 Tons 4To...

Страница 73: ...n 1 330 CFM 1 520 CFM 1 900 CFM Recommend CFM 450 CFM Per Ton 1 575 CFM 1 800 CFM 2 250 CFM Two Stage Condensing Unit In First Stage Cooling Table 31 Two Stage Condensing Unit In First Stage Cooling A...

Страница 74: ...206 CFM 1 508 CFM Variable Condensing Unit Minimum Cooling CFM Table 33 Variable Condensing Unit Minimum Cooling CFM At minimum blower CFM superheat must be at or above 5 SH Model EL18XCV 024 EL18XCV...

Страница 75: ...Per Ton For Zoning 333 CFM 327 CFM 608 CFM 677 CFM Recommend CFM 450 CFM Per Ton 394 CFM 387 CFM 720 CFM 801 CFM Electric Heating ECBA25 P CBA25UHV Table 35 Electric Heating ECBA25 P CBA25UHV 240VAC 3...

Страница 76: ...att Size by kW No Of Stages Low Heating BTU Air ow to 30 Tr Max Heating BTU 4kW 1 13 652 421 CFM 13 652 5kW 1 17 065 527 CFM 17 065 6kW 1 20 478 632 CFM 20 478 8kW 2 13 652 421 CFM 27 304 9kW 2 15 358...

Страница 77: ...ON all zones receive conditioned air at the same time like traditional non zoned HVAC systems The master thermostat located in Zone 1 controls any heating or cooling need for all zones in the buildin...

Страница 78: ...used at night should not zoned with a living room that is used only during the day or evening 8 8 How do I use the Optional Humiditrol Dehumidification Accessory If your zoned system is equipped with...

Страница 79: ...Zone Information Record Table 37 Homeowners Zone Information Record Zone Number Record which rooms are zoned together and controlled by thermostat number 1 2 3 4 Lennox Dealer Contact Telephone Number...

Страница 80: ...80...

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