H1008A,D
Automatic Humidity Control
INSTALLATION INSTRUCTIONS
APPLICA TION
The H1008A,D Automatic Humidity Controls with
HumidiCalc+™ Software are duct mounted and provide
automatic, low voltage, electronic control of by-pass flowthrough, powered flow-through, steam and drum humidifiers in central heating systems. The H1008D also controls
heat/energy recovery units and dehumidifiers. The
H1008A,D are designed to automatically adjust the
humidity level based on indoor temperature and humidity,
inferred or measured outdoor temperature and the setting
of the frost factor dial. The frost factor setting is used to
maintain a comfortable humidity level in the home while
reducing moisture condensation on inside windows. The
HumidiCalc+™ Software infers the outdoor temperature by
monitoring the equipment cycles and eliminates the need
for an outdoor temperature sensor when used on singlestage gas or oil furnaces. With the use of the C7089H
Outdoor Temperature Sensor (purchased separately), the
H1008A,D also provide automatic humidity control in heat
pump and multi-stage systems.
INST ALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous condition.
2. Check the ratings given in the instructions to make
sure the product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
Use the following specifications for this installation:
Electrical Ratings:
Power Supply: 24 Vac, 60 Hz.
Humidifier Control Relay Contacts:
Inductive: 2A full load, 10A locked rotor.
Resistive: 2A.
Thermostat/Furnace Load: 11 mA maximum at 24 Vac.
Location and Mounting
H1008A,D Automatic Humidity Control
IMPORTANT
Do not install H1008 on supply air. Temperatures
in excess of 120
error mode. If mounting near an elbow area,
keep the control 6 in. (152 mm) upstream from
the elbow so that the humidity and temperature
sensor is exposed to the normal airflow (Fig.1).
Locate the control at least 12 in. (305 mm) upstream from
the humidifier (or dehumidifier/ventilator supply air) in the
return air duct where it can be exposed to the air stream of
the return air. See Fig. 1.
RETURN
AIR
6 in. (152 mm)
MINIMUM
BEST
LOCATION
RETURN AIR DUCT
Fig. 1. Select duct location for control.
Use the following procedure to mount the H1008A,D in the
return air duct:
1. Remove the cover by placing your thumb in the
bottom notch between the cover and the base and
pulling out and up. See Fig. 2.
°
F cause the control to go into
ALTERNATE LOCATION
15 in. (381 mm)
MINIMUM
RETURN
AIR
M12822
CA UTION
Voltage Hazard.
Power supply can cause electrical shock.
Disconnect power supply before beginning
installation.
®U.S. Registered Trademark
Copyright © 1999 Honeywell Inc. • All Rights Reserved
X-XX UL
M12828
Fig. 2. Remove cover from base.
69-1185EF-2
H1008A,D AUTOMATIC HUMIDITY CONTROL
2. Drill 3/4 in. (19 mm) circular opening for the projection on the back of the base. See Fig. 3. Place the
device on the duct and mark the mounting holes, or
screw in self-tapping screws.
NOTE: Be sure the sheet metal surface is flat after
drilling and cutting holes.
3/4 IN. HOLE
BASE
M12829A
Fig. 3. Mount control on return air duct.
3. Mount the base on the duct using the four mounting
screws provided. Tighten the screws until fully
seated with no space between the base and the
duct. See Fig. 3.
4. Run a low voltage wire from the humidifier (and
dehumidifier or ventilator for H1008D) and equipment to the control terminals. See Fig. 5-10. Use
either straight in or wraparound wiring connections.
See Fig. 4.
5. Snap the cover onto the base.
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT
INSERTION STRIP
5/16 IN. (8 MM).
M12827
Fig. 4. Proper wiring technique.
C7089H Outdoor Temperature Sensor
NOTE: The C7089H Outdoor Temperature Sensor is
recommended when using the control with heat
pump, multi-stage equipment, or multi-zone
applications.
Mount the sensor (purchased separately):
out of direct sunlight on the North side of the house.
at least three feet from dryer vents or other vents.
above the expected snow line where ice and debris
cannot cover it.
Use the following procedure for mounting:
1. Place the sensor in the clamp provided.
2. Insert the screw provided through both of the holes
in the clamp and fasten the sensor in place.
WIRING
CA UTION
Voltage Hazard.
Power supply can cause electrical shock
and injury.
Disconnect power supply before installation or
servicing.
All wiring must comply with applicable local codes,
ordinances and regulations.
IMPORTANT
Use 18- to 22-gauge insulated wire for proper
wiring. Stranded-tinned wire is recommended.
NOTE: Connect the humidistat to the furnace for two
reasons:
• The control can determine the outdoor
temperature.
• The control knows when the furnace blower
is operating, eliminating the need for current
sensing relays.
To wire the Automatic Humidity Control:
IMPORTANT
When installing a steam-powered humidifier, be
sure to cut steam jumper-wire for proper
operation.
1. Connect 24 Vac power to the 24 Vac HOT and COM
terminals on the H1008A,D.
2. Connect the humidifier to the two HUM terminals on
the H1008A,D as shown in Fig. 6 through 10.
3. In furnace systems with two transformers, connect
CG to the cooling system transformer common and
connect CW to the heating transformer common. Be
sure G and W connect to the R terminals of both
transformers. (If only one transformer is used, leave
the jumper on CG and CW.) See Fig. 5.
4. To wire the C7089H Outdoor Temperature Sensor,
wire the sensor to the two OUT terminals on the
H1008A,D.
IMPORTANT
For proper wiring, use 18- to 22 gauge insulated
wire. Stranded-tinned wire with a maximum
(length of 300 ft (91m) is recommended.
H1008 AUTOMATIC
HUMIDITY CONTROL
OUT
FAN
RELAY
HEATING
RELAY
COOLING
TRANSFORMER
120V
2
120V
HEATING
TRANSFORMER
L1
(HOT)
L2
L1
(HOT)
L2
1
1
M13307
OUT
G
CG
CW
W
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
IN SINGLE TRANSFORMER SYSTEMS, JUMPER CG AND CW.
Fig. 5. Wiring for two-transformer system.
69-1185EF—2
2
H1008A,D AUTOMATIC HUMIDITY CONTROL
(HOT)
FLOW
THROUGH
BYPASS
HUMIDIFIER
SOLENOID
1
BLACK
L1
WHITE
L2
24 VAC
10
BLACK
11
9
HOT
COM
24 VAC
AUTOMATIC HUMIDITY CONTROL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
24V WIRING.
TO PROVIDE HUMIDITY IN FAN MODE, CONNECT G AND CG
3
TERMINALS TO FAN RELAY.
4
IN TWO TRANSFORMER SYSTEMS, REMOVE CW/CG FACTORY
INSTALLED JUMPER.
5
IF USING OUTDOOR TEMPERATURE SENSOR, REMOVE FACTORY
INSTALLED JUMPER.
6
ISOLATED RELAY CONTACTS.
Fig. 6. Wiring for flow-through by-pass humidifiers.
11
RED
RED
9
HOT
COM
24 VAC
2
K
AUTOMATIC HUMIDITY CONTROL
10
YELLOW
YELLOW
FAN POWERED FLOW THROUGH HUMIDIFIER
FAN
MOTOR
1
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
24V WIRING.
3
TO PROVIDE HUMIDITY IN FAN MODE, CONNECT G AND CG
TERMINALS TO FAN RELAY.
4
IN TWO TRANSFORMER SYSTEMS, REMOVE CW/CG FACTORY
INSTALLED JUMPER.
5
IF USING OUTDOOR TEMPERATURE SENSOR, REMOVE FACTORY
INSTALLED JUMPER.
6
ISOLATED RELAY CONTACTS.
HE360 HUMIDIFIER BOARD
BLUE
BLUE
BLACK
WHITE
Fig. 7. Wiring for fan powered flow-through humidifiers.
DEHUM
DEHUM
HUM
HUM
DEHUM
DEHUM
HUM
HUM
24V120V
6
8
6
8
6
OFF TEST
6
OFF TEST
RED
RED
YELLOW
YELLOW
BLUE
BLUE
OPTIONAL
OUTDOOR
AIR SENSOR
FROST
FACTOR
SETPOINT
DIAL
OPTIONAL
OUTDOOR
AIR SENSOR
FROST
FACTOR
SETPOINT
DIAL
ROOM THERMOSTAT
G
3
FAN
RELAY
HEAT
RELAY
ROOM THERMOSTAT
G
3
FAN
RELAY
HEAT
RELAY
W
W
R
7
FURNACE
TRANSFORMER
R
7
FURNACE
TRANSFORMER
OUT
5
OUT
G
4
CG
CW
W
7
HEAT ONLY APPLICATION SHOWN. SIMILAR WIRING REQUIRED IN HEAT
AND COOL SYSTEM WITH ONE OR TWO TRANSFORMERS. WHEN HEAT
AND FAN OPERATE SIMULTANEOUSLY WITH ONE RELAY, JUMP W TO G
AND JUMP CG TO CW.
8
POWER SHOULD BE APPLIED TO THIS CONTROL AT ALL TIMES. DO NOT
USE FAN BOARD HUMIDISTAT CONTACTS OR CURRENT SENSING RELAY.
9
CUT JUMPER FOR DEHUMIDIFIER APPLICATION. (DO NOT CUT FOR
VENTILATION SYSTEM.)
10
DEHUM TERMINALS SWITCH LOW VOLTAGE DEHUMIDIFIERS, HEAT/ENERGY
RECOVERY UNITS OR EXTERNAL CONTACTORS THAT SWITCH HIGH
VOLTAGE DEHUMIDIFIERS.
JUMPER AND DEHUM TERMINALS NOT PRESENT ON H1008A MODEL.
11
OUT
5
OUT
G
CG
4
CW
W
BLACK
1
BLACK
CONNECTOR
7
HEAT ONLY APPLICATION SHOWN. SIMILAR WIRING REQUIRED IN HEAT
AND COOL SYSTEM WITH ONE OR TWO TRANSFORMERS. WHEN HEAT
AND FAN OPERATE SIMULTANEOUSLY WITH ONE RELAY, JUMP W TO G
AND JUMP CG TO CW.
POWER SHOULD BE APPLIED TO THIS CONTROL AT ALL TIMES. DO NOT
8
USE FAN BOARD HUMIDISTAT CONTACTS OR CURRENT SENSING RELAY.
9
CUT JUMPER FOR DEHUMIDIFIER APPLICATION. (DO NOT CUT FOR
VENTILATION SYSTEM.)
DEHUM TERMINALS SWITCH LOW VOLTAGE DEHUMIDIFIERS, HEAT/ENERGY
10
RECOVERY UNITS OR EXTERNAL CONTACTORS THAT SWITCH HIGH
VOLTAGE DEHUMIDIFIERS.
11
JUMPER AND DEHUM TERMINALS NOT PRESENT ON H1008A MODEL.
SOLENOID
L1
(HOT)
L2
M13296
L1
(HOT)
L2
M13295
1
1
3
69-1185EF—2
H1008A,D AUTOMATIC HUMIDITY CONTROL
STEAM HUMIDIFIER
HUMIDISTAT
TERMINALS
TO SYSTEM FAN
3
FAN
WIRING
6
24
VAC
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
24V WIRING.
REFER TO THE STEAM HUMIDIFIER INSTALLATION
INSTRUCTIONS TO WIRE SYSTEM FAN.
CUT JUMPER FOR STEAM HUMIDIFIER CONTROL.
FAN TERMINALS G AND CG NOT USED IN THIS APPLICATION.
EXTERNAL TRANSFORMER NOT PROVIDED.
IF OUTDOOR TEMPERATURE SENSOR IS NOT USED, WIRE HEAT
TERMINALS W AND CW TO FURNACE.
IF USING OUTDOOR TEMPERATURE SENSOR, REMOVE FACTORY
INSTALLED JUMPER.
(HOT)
1
L1
L2
1
2
3
4
5
6
7
8
DRUM HUMIDIFIER
DRUM
MOTOR
2
1
BLACK
L1
(HOT)
WHITE
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
24V WIRING.
2
3
TO PROVIDE HUMIDITY IN FAN MODE, CONNECT G AND CG
TERMINALS TO FAN RELAY.
4
IN TWO TRANSFORMER SYSTEMS, REMOVE CW/CG FACTORY
INSTALLED JUMPER.
IF USING OUTDOOR TEMPERATURE SENSOR, REMOVE FACTORY
5
INSTALLED JUMPER.
6
ISOLATED RELAY CONTACTS.
BLACK
2
10
BLACK
14
12
13
11
9
Fig. 9. Wiring for drum style humidifiers.
DEHUM
DEHUM
HUM
HUM
HOT
COM
24 VAC
9
9
OFF TEST
11
OUT
OUT
8
G
5
CG
CW
W
AUTOMATIC HUMIDITY CONTROL
ISOLATED RELAY CONTACTS.
9
10
HEAT ONLY APPLICATION SHOWN. SIMILAR WIRING REQUIRED IN HEAT
AND COOL SYSTEM WITH ONE OR TWO TRANSFORMERS. WHEN HEAT
AND FAN OPERATE SIMULTANEOUSLY WITH ONE RELAY, JUMP W TO G
AND JUMP CG TO CW.
11
POWER SHOULD BE APPLIED TO THIS CONTROL AT ALL TIMES. DO NOT
USE FAN BOARD HUMIDISTAT CONTACTS OR CURRENT SENSING RELAY.
12
CUT JUMPER FOR DEHUMIDIFIER APPLICATION. (DO NOT CUT FOR
VENTILATION SYSTEM.)
DEHUM TERMINALS SWITCH LOW VOLTAGE DEHUMIDIFIERS, HEAT/ENERGY
13
RECOVERY UNITS OR EXTERNAL CONTACTORS THAT SWITCH HIGH
VOLTAGE DEHUMIDIFIERS.
14
JUMPER AND DEHUM TERMINALS NOT PRESENT ON H1008A MODEL.
Fig. 8. Wiring for steam humidifiers.
DEHUM
6
DEHUM
HUM
6
HUM
HOT
COM
OFF TEST
24 VAC
8
AUTOMATIC HUMIDITY CONTROL
OUT
5
OUT
G
4
CG
CW
W
HEAT ONLY APPLICATION SHOWN. SIMILAR WIRING REQUIRED IN HEAT
7
AND COOL SYSTEM WITH ONE OR TWO TRANSFORMERS. WHEN HEAT
AND FAN OPERATE SIMULTANEOUSLY WITH ONE RELAY, JUMP W TO G
AND JUMP CG TO CW.
POWER SHOULD BE APPLIED TO THIS CONTROL AT ALL TIMES. DO NOT
8
USE FAN BOARD HUMIDISTAT CONTACTS OR CURRENT SENSING RELAY.
9
CUT JUMPER FOR DEHUMIDIFIER APPLICATION. (DO NOT CUT FOR
VENTILATION SYSTEM.)
DEHUM TERMINALS SWITCH LOW VOLTAGE DEHUMIDIFIERS, HEAT/ENERGY
10
RECOVERY UNITS OR EXTERNAL CONTACTORS THAT SWITCH HIGH
VOLTAGE DEHUMIDIFIERS.
JUMPER AND DEHUM TERMINALS NOT PRESENT ON H1008A MODEL.
11
OPTIONAL
OUTDOOR
AIR SENSOR
4
OPTIONAL
OUTDOOR
AIR SENSOR
FROST
FACTOR
SETPOINT
DIAL
7
FROST
FACTOR
SETPOINT
DIAL
3
ROOM THERMOSTAT
G
W
HEAT
RELAY
ROOM THERMOSTAT
G
FAN
RELAY
W
HEAT
RELAY
R
R
10
FURNACE
TRANSFORMER
7
FURNACE
TRANSFORMER
L1
(HOT)
L2
M13298
L1
(HOT)
L2
M13297
1
1
69-1185EF—2
4
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