I N D O O R A I R Q U A L I T Y
HCWB2
HEALTHY CLIMATE
®
By−Pass Humidifier
E N G I N E E R I N G D A T A
Bulletin No. 210488
August 2008
Supersedes September 2007
Universal Humidifier Control
(Furnished with A" Models)
MODEL NUMBER IDENTIFICATION
Unit Type
HCWB = Healthy Climate
®
By−Pass Humidifier
HCWBK = Healthy Climate
®
By−Pass Humidifier
with Installation Kit (Canada Only)
Series
Nominal Capacity
12 = 12 US Gallons/day
17 = 16.75 US Gallons/day
Controls
(blank) = Manual Humidistat
A = Universal Humidifier Control
HCWB 2 − 17 A
FEATURES
Warranty
All covered components
− limited warranty for
five
years
in residential applications, one year in
non−residential applications.
Refer to the Lennox Equipment Limited Warranty
certificate included with the unit for additional details.
Applications
Applicable to most forced air installations.
Installs on the supply air plenum with a by−pass duct from
the return plenum in up−flow and horizontal applications.
Installs on the return air plenum with a by−pass duct from
the supply plenum in down−flow applications. See Typical
Applications.
Provides additional humidity to the home during the
heating season to increase comfort level.
Humidifier, saddle valve and humidistat/universal
humidifier control shipped in one package.
Approvals
Units are ETL listed per ANSI/UL 998 and CSA C22.2
No.104−01.
Sequence of Operation
Humidifier will only operate when indoor blower is
operating.
When the level of moisture in the return air or living space
area drops below the set point of the humidistat/universal
control, the water solenoid valve opens, water flows into
distribution tray and weeps down through the evaporator
pad. By−pass air flows over the evaporator pad, increasing
the humidity of the air, and then back into the return air
stream. When the humidistat/universal control is satisfied
the water solenoid valve closes.
Cabinet
Rugged, corrosion resistant molded plastic.
Humidifier is shipped for left−hand by−pass duct
connection.
For right−hand by−pass duct connection, rotate humidifier
cabinet 180º top for bottom and relocate solenoid valve to
alternate locations on cabinet. See Installation
Instructions for additional details.
Built−in damper included to close off bypass duct during
summer cooling operation.
