Lennox Y3760 User Manual
INSTALLATION &
USER MANUAL
HC Digital Automatic
Humidistat (Y3760)
CONTROLS
506808-01
3/2016
Supersedes 6/2011
picture goes here
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
NOTICE
The humidistat must be installed in accordance with
all local and national standards.
Installation, adjustments, alterations, service and
maintenance must be performed by a qualified ser
vice technician.
Product Description
The HC Digital Automatic Humidistat is a programmable
control for HCSteam residential humidifiers. While the HC
Digital Automatic Humidistat may be used for control of
other humidification or dehumidification appliances, its op
erating modes are designed for modulating control of the
HCSteam electrode steam humidifiers.
When properly installed and configured, the HC Digital Au
tomatic Humidistat will use information from the environ
ment including Relative Humidity, Outdoor Temperature
and Home Construction to determine the Ideal Humidity
and the Optimum Humidifier Output.
Table of Contents
Product Description 1............................
Installation 2....................................
Electrical connections: 3.........................
User Interface and Modes 5......................
Configuration (Setting DIP Switches, Parameters,
Auto humidity control, Sensor calibration) 6.........
Functions 7....................................
Parameters 8..................................
Alarms and Signals 8...........................
Technical Specifications and Wiring 9.............
Replacement Parts 9............................
The HC Digital Automatic Humidistat includes an Indoor
Temperature Sensor, Indoor Humidity Sensor and Control
Unit. A separate Outdoor Sensor is supplied.
Humidistat Dimensions
°C/°F
°C/°F
Set
Set
Prg
Prg
5 1/4” (135 mm)
1-1/2”
(36 mm)
3 1/2” (86 mm)
Disposal
The product is made from metal and plastic
parts. All parts must be disposed of accord
ing to the local standards on waste disposal.
Page 1
Installation
1. Open the product by detaching the front from the
mounting base, as shown in figure 1:
D Remove the screw holding the locking tab in place
(detail A).
D Slide the plastic tab back as shown to remove it
from the base (detail B).
D Press the tab on the front with the flat-head screw
driver into the slit in the middle on the bottom of the
case (detail C) while lifting the front panel upwards
(detail D).
°C/ F
Set
Prg
detail A
detail B
detail C
the connection and control cables from the relay
cables. The diagrams are shown under Electrical Con
nections (Page 3).
NOTICE
Make sure all connections are complete before re
connecting the flat cable and front part of the humi
distat.
For the purposes of electrical safety, once the con
troller has been installed, replace the plastic locking
tab in the humidistat base.
Table 1. Connections and DIP switches
Connector Function
J1 Not used
J2 Not used
Flat front-rear The flat front-rear connection cable must be re
connected in the position defined by the plastic
part to ensure correct polarity.
DIP switches For configuring humidification/dehumidification
modes.
detail D
Figure 1. Opening the humidistat
2. Disconnect the flat front-rear connector cable from the
front panel.
3. Fasten the humidistat base to the wall using the
screws supplied.
4. Access the terminal block by squeezing the clips on
the terminal cover.
5. Make the necessary connections and run the wires
through the hole in the middle of the base. Separate
Dip−switches
J1 (NOT USED)
FLAT Front−Rear
J2 (NOT USED)
506808-01 06/11
Page 2
Electrical connections
Connect the HC Digital Automatic Humidistat to
HCSteam Humidifier for Modulating Operation
IMPORTANT - Be sure the connections are made as de
scribed in the following and as shown in figure 2.
1. Connect HCSteam Humidifier terminal 24V to HC Dig
ital Automatic Humidistat terminal 6-G.
2. Connect HCSteam Humidifier terminal GND to HC
Digital Automatic Humidistat terminal 5-G0.
3. Connect HCSteam Humidifier terminal IN to HC Digital
Automatic Humidistat terminal 7-AOUT.
NOTES -
S Modulating operation requires that the signal type be
changed at the HCSteam Humidifier. See HCSteam
Humidifier Installation Instruction Manual 506746-01.
S Verify DIP switch settings per figure 2.
DIP Switch
settings
HCSteam
Y3760
ON
OFF
OFF
ON
1 2 3 4
ON DP
Connect the HC Digital Automatic Humidistat
to HCSteam Humidifier for ON-OFF Operation
IMPORTANT - Be sure the connections are made as de
scribed in the following and as shown in figure 3.
1. Connect HCSteam Humidifier terminal 24V to HC Dig
ital Automatic Humidistat terminal 6-G.
2. Connect HCSteam Humidifier terminal GND to HC
Digital Automatic Humidistat terminal 5-G0.
3. Connect HCSteam Humidifier terminal GND to HC
Digital Automatic Humidistat terminal 1.
4. Connect HCSteam Humidifier terminal IN to HC Digital
Automatic Humidistat terminal 2.
Connect HCSteam Humidifier terminals 24V and GND to
HC Digital Automatic Humidistat terminals 6-G and 5-G0
respectively. Do not reverse these connections. Connect
HC Digital Automatic Humidistat terminal 1 and 2 to
HCSteam terminal GND and IN respectively. Do not re
verse these connections (see figure 3).
NOTES -
S HCSteam humidifiers are configured for On-OFF op
eration from the factory. See HCSteam Humidifier
Installation Instruction Manual 506746-01.
S Verify Dip Switch Settings per figure 3.
DIP Switch
HCSteam
settings
Y3760
ON
OFF
OFF
1 2 3 4
ON
ON DP
Outdoor Temp.
Sensor (if used)
Figure 2. Connect for Modulating Operation
Outdoor Temp.
Sensor (if used)
Figure 3. Connect for ON-OFF Operation
Page 3
HC SERIES
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