ABOVE EXPECTED
SNOW LINE
OUTDOOR
TEMPERATURE
SENSOR
NORTH, EAST
OR WEST SIDE
OF HOME
CONNECT DRAIN LINE HERE
YELLOW
24 V
SOLENOID
VALVE
WIRES
WATER SUPPLY
SHUT-OFF
(SADDLE VALVE)
NOTE
VERIFY THAT MODE SWITCH
IS IN THE “BYPASS” POSITION.
NOTE
DO NOT WIRE TRANSFORMER
USING FURNACE BLOWER CIRCUIT.
AUTOMATIC
HUMIDIFIER
CONTROL
LO
HI
C
24V
ODT
H
C
R
P
O
W
E
R
B
Y
P
A
S
S
24 VAC FURNACE ACCESSORY TERMINALS
(10 VA MINIMUM) OR 24 VAC TRANSFORMER
(10 VA MINIMUM)
CURRENT
SENSING
RELAY
(IF REQUIRED)
FURNACE
BLOWER MOTOR
COMMON
MOTOR
LEAD
NOTE
CURRENT SENSING RELAY
REQUIRED IF TRANFORMER
IS CONSTANTLY POWERED.
FURNACE
BLOWER MOTOR
WATER SUPPLY
HI
C
LO
CONNECT DRAIN LINE HERE
CURRENT SENSING RELAY
(IF REQUIRED)
SHUT-OFF
(SADDLE VALVE)
YELLOW 24 V
SOLENOID
VALVE WIRES
24 VAC FURNACE
ACCESSORY TERMINALS
OR TRANSFORMER
(10 VA MINUMUM)
COMMON LEAD
MANUAL
HUMIDIFIER CONTROL
IMPORTANT
USE 120 VAC POWER SOURCE OTHER THAN FURNACE MOTOR
CIRCUIT. HOWEVER, THE TRANSFORMER CAN BE POWERED OFF
THE HOT 120 VAC LINE BEFORE IT ENTERS THE FURNACE.
• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.
IMPORTANT
WHEN CURRENT SENSING RELAY IS USED:
• WIRE CURRENT SENSING RELAY INTO 24 VAC HUMIDIFIER
CONTROL CIRCUIT ONLY!
DO NOT INSTALL IN TRANSFORMER
PRIMARY CIRCUIT.
The humidifier can be installed on either the
supply or return plenum of a forced air
handling system and is easily reversible for
installation with right hand or left hand
bypass duct connections. The humidifier
dimensions and serviceability must be
considered when selecting the best location
for the humidifier. Here are 2 examples of
many types of installations.
Horizontal
Upflow
90-1452
INSTALLATION OPTIONS
TEMPLATE MUST BE LEVEL
WARNING
SPECIFICATIONS
HUMIDIFIER DIMENSIONS
Width
(including solenoid valve):
15
3
⁄
8
”
Height
(including drain spud):
15
3
⁄
4
”
Depth
:
10
1
⁄
4
”
BYPASS DUCT OPENING
6” diameter
PLENUM OPENING
10”W x 12
3
⁄
4
”H
WATER FEED RATE
3 gph
ELECTRICAL DATA
24 VAC-60 Hz, 0.5 AMP
CAUTION
1. Water heating system can be damaged if water
supply remains off.
2. After humidifier installation is completed, turn hot
water supply back on.
3. Water heating system must be de-energized if the
main water supply remains shut off.
4. Do not set humidity level above recommended or to
recommended level if condensation exists on inside
windows of any unheated space, as condensation
damage may result. Excess humidity can cause
moisture accumulation which can allow the
possibility for mold growth in your home.
5. Do not install humidifier in location where freezing
temperatures may occur. The water line could freeze
and crack causing water damage to the home.
6. Do not install humidifier or bypass connection
on furnace cabinet.
7. Do not install humidifier or bypass connection
on blanked off end of cooling coil where
airflow will be restricted.
8. Do not connect the transformer to blower
motor wiring. Premature component failure
may result.
9. Do not install humidifier where water
pressures exceed 125 psi, since humidifier
damage may result. Follow codes in effect
concerning pressure reduction.
10. Do not install humidifier on systems with
greater than 0.4 in. wg pressure differential
between supply and return plenums.
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
INSTALLATION INSTRUCTIONS AND TEMPLATE FOR HEALTHY CLIMATE LARGE BYPASS
HUMIDIFIER MODELS HCWB3-17, HCWB3-17K, HCWB3-17A & HCWB3-17AK
HUMIDIFIER
HEALTHY CLIMATE
®
HUMIDIFIERS
506366-01
4/2011
(Supersedes 7/2009)
1.
ELECTRICAL SHOCK HAZARD.
Can cause injury or death.
Disconnect all electrical power
supplies before servicing.
2.
RISK OF PROPERTY DAMAGE, INJURY OR
DEATH.
Installation, adjustments, alterations,
service and maintenance must be performed
by your Lennox dealer.
3.
RISK OF SCALDING.
Water temperature over
125°F can cause severe burns and scalding
instantly. Shut off the hot water supply before
disconnecting or tapping into any hot water
supply line.
4.
RISK OF SHARP EDGES HAZARD.
Equipment
sharp edges can cause injuries. Avoid grasping
equipment edges without protective gloves.
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
This product must be installed by a qualified heating and air conditioning contractor. Failure to do so could result in serious injury from electrical shock.
This product must be installed in compliance with all local, state and federal codes.
ATTENTION INSTALLER:
90-1433
90-1478
RETURN
AIR
SUPPLY
AIR
COOLING
COIL
FLUE
RETURN
AIR
SUPPLY
AIR
COOLING
COIL
RECOMMENDED WIRING DIAGRAMS
Model HCWB3-17 & HCWB3-17K
MANUAL CONTROL
For detailed Manual Humidifier Control installation
and wiring instructions, see Publication No. 506407−01
included with Control.
Models HCWB3-17A
& HCWB3-17AK
AUTOMATIC HUMIDIFIER CONTROL
For detailed Automatic
Humidifier Control installation
and wiring instructions, see
Publication No. 504,879M
included with Control.
TRACE ALONG OUTER EDGE
WARNING
Cover on humidifier must be securely in
place when blower is operating. Gas fumes,
which could contain carbon monoxide, can
be drawn into living space resulting in
personal injury or death.
