Lennox EDA - Additional Parts Required; Introduction; Comfortsense 7500 Thermostat; Icomfort Family of Thermostats

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1.2. Additional Parts Required
Separately-ordered components are restricted to those listed in the Product
Specicationsandthepricebook
Table 2. Additional Parts
Quantity Description
Application
specic
OutdoorTemperatureSensor(X2658)
75VA24VACindoorunittransformer(12P61)isrequiredwhentheHumiditrolunitis
installedwithatwo-stageheatpumpsystem.
HumiditrolInsulationandPipingKit(referto“Figure1.DecisionTree”onpage
5).
HumiditrolZoningAccessory(39W67).Requiredwheninstallinginsystemwith
HarmonyIIIzoningsystem.
HumiditroliscompatiblewiththefollowingLennoxthermostats:
Table 3. Compatible Lennox Thermostats
Description
ComfortSense
®
7500thermostat(13H14)
iComfort
®
E30SmartThermostat(15S64)
iComfort
®
M30Thermostat(15Z69)
iComfort
®
S30UltraSmartThermostat(12U67)
IMPORTANT
TheapprovedapplicationfortheHumiditrolunitisrestrictedtothoselistedinthe
ProductSpecicationsandpricebook
NOTE: 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 maintenance can cause
property damage or personal injury. Installation and service must be
performed by a qualied installer and servicing agency.
1.3. Introduction
Humiditrol
®
 is designed for installation with a Lennox HFC-410A split-system
outdoor unit and an air handler or a furnace with a variable speed blower. It is
designedforindoorinstallationsonlyineitherup-oworhorizontalairdischarge
applications.
NOTE: Humiditrol is not compatible with variable-capacity outdoor units!
• HumiditrolisforuseonlyonHFC-410Asystemswiththermalexpansionvalve
installed.
• Prior to installation, study the decision tree (see “Figure 1. Decision Tree” on
page 5) to conrm that all application requirements for Humiditrol installation
aremet.
• Lowambientpressureswitchtypecontroloptioncanbeappliedtothistypeof
system down to 30ºF. For low ambient kit part numbers, refer to the Product
Specicationsaccessoriessection.
NOTE: The low ambient control option (down to 0ºF) is not compatible with
Humiditrol.
Beforebeginninginstallation,besuretheHVACsystemcomponentsarecompatible
with the Humiditrol. See “Figure 1. Decision Tree” on page 5 for the system
decision tree that describes compatible components of the system. One of the
followingthermostatsisrequiredfortheHumiditrolsystem:
1.3.1. ComfortSense
®
7500 Thermostat
NOTE: When wiring the thermostat into the system, be sure these requirements
are met:
• Minimum18gaugethermostatwireisused.
• Maximumthermostatwirerunlengthdoesnotexceed300feet(90m).
• Totalloadfromanythermostatconnectionislessthan1amp.
1.3.2. iComfort
®
Family of Thermostats
NOTE: When wiring the thermostat into the system, be sure these requirements
are met:
• Minimum18gaugethermostatwireisused.
• Maximumthermostatwirerunlengthdoesnotexceed1500feet(455m)
• Totalloadfromanythermostatconnectionislessthan1amp.
1.3.3. Operation Overview
NOTE: These instructions are intended as a general guide and do not supersede
local codes in any way. Consult authorities having jurisdiction before
installation.
• The Humiditrol unit operates to dehumidify, as required, when ambient
temperaturesarebelow95ºF.
• However,whentemperaturesreach95ºF,coolinganddehumidicationdemands
are both serviced by increased cooling system run-time and does not use
Humiditrol.
• Neither the CS7500 or any of the iComfort family of thermostats will activate
Humiditrolwhentheambienttemperatureisatorabove95ºF.
• Priortosystemcheckout,considertheoutdoorambienttemperaturesincethe
Humiditrolwillnotoperateabove95ºF.
• Plantestingtobeconductedwhentemperaturesarebetween65ºFand95ºFto
ensureproperHumiditrolsetupandcheckoutoperation.
• Humiditrolremovesmoisturefromtheindoorairatagreaterratethancooling
alone. On a call for dehumidication, the indoor blower is slowed down, the
outdoorfan isoperated ata lower speed,and thecompressor isupstaged to
high-stageoperation(two-stageunits).Theindoorcoolingcoilnowoperatesasa