Honeywell H808C User Manual
H808C
Convertible Dehumidifier Controller
Application
The H808C Dehumidifier Controller provides automatic
low voltage control of dehumidifiers in central heating
systems. The humidity controller has an spst, snap-acting,
dust-proof switch and is designed for wall or surface duct
mounting.
MODELS:
■ H808C1029: Premier White™.
■ H808C1037: Beige.
ELECTRICAL RATING: 50 VA at 24 Vac.
MAXIMUM AMBIENT TEMPERATURE: 125° F [52° C].
SWITCH DIFFERENTIAL: 5 percent RH, nonadjustable.
SET POINT ADJUSTMENT RANGE: 20 to 80 percent
RH; positive ON and OFF positions.
Installation
CAUTION
1. Installer must be a trained, experienced service
technician.
2. Disconnect power supply before beginning
installation.
3. Conduct a thorough checkout before leaving
installation.
WALL MOUNTING
1. Locate the humidity controller about 5 ft [1.5m]
above the floor on an inside wall.
NOTES:
a. Be sure the humidity controller is subject to average
room temperature and average relative humidity.
The maximum temperature at the location selected
must not exceed 125° F [52° C].
b. The humidity controller can be mounted directly on
the wall.
2. Drill a small hole in the wall.
3. Run low voltage wiring to the location and pull about
6 in. [152 mm] of wire through the hole.
NOTE: Plug the opening to prevent drafts from affecting
humidity controller operation.
4. Remove the humidity controller assembly by prying
with a screwdriver in the notch on the bottom of the case
(Fig. 1).
5. Position the case horizontally over the wires with the
arrows on the tabs pointing up and secure the case to the
wall using the two screws provided.
6. Connect the wires to the humidity controller assembly using leadwires and wire nuts provided (see Wiring
section and Fig. 2).
7. Tuck the wires into the bottom of the case.
8. Snap the cover assembly into the case (Fig. 2).
Fig. 1—Removing humidity controller assembly
from case.
M9262
Fig. 2—Wiring connections on humidity
controller.
QUICK-CONNECT
WIRE LEAD
UP
MOUNTING
HOLE (2)
COVER
CASE
UP
UP
M9263
WIRE
NUT
HUMIDIFIER
LEADWIRE
1 69-0821
J.F. • 3-94 • ©Honeywell Inc. 1994 • Form Number 69-0821
DUCT MOUNTING
1. Locate the humidity controller at least 8 in. [203 mm]
upstream of the humidifier in the return air duct.
NOTE: If mounting near an elbow area, keep the humidity
controller 6 in. [152 mm] upstream of the elbow so the
element will be affected by the normal airflow (Fig. 3)
.
2. Using Fig. 4 and the instructions on the template,
drill two mounting holes (3/32 in. [2.4 mm]) and 12 sensing
holes (1/4 in. [6.4 mm] in diameter) in the duct. (The
sensing holes allow return air to reach the nylon sensing
element and operate the humidity controller.)
NOTE: If desired, cut a square hole in the duct as indicated
on the template in place of the sensing holes.
Fig. 3—Selecting a duct location for the humidity controller.
ALTERNATE
RETURN
AIR
6 in. [152 mm]
MINIMUM
BEST LOCATION
RETURN AIR DUCT
LOCATIONS
15 in. [381 mm]
MINIMUM
RETURN
AIR
M9277
7. While holding wire in place, mount the case on the
duct using the two mounting screws provided.
NOTE: Tighten the screws firmly so the gasket seals the
space between the case and the duct (Fig. 4).
8. Connect the wires to the humidity controller assembly using leadwires and wire nuts supplied (see Wiring
section and Fig. 2).
9. Snap cover assembly into the case.
Fig. 4—Mounting humidity controller on return
air duct.
LOCATE TEMPLATE.
1
2
PEEL BACKING
FROM TEMPLATE
AND APPLY TO DUCT.
3
PUNCH AND DRILL
TWO 3/32 IN. [3 mm]
MOUNTING HOLES.
DRILL MINIMUM
4
OF TWELVE
1/4 IN. [7 mm] HOLES.
OR
DRILL OR PUNCH
CORNER HOLES AND
CUT OUT SQUARE
ON SOLID LINE.
3. Remove the protective backing from the foam gasket
included with each control and apply the foam gasket to the
template in the location indicated.
4. Remove the cover and humidity controller assembly
from the case by prying with a screwdriver in the notch in
the bottom of the case (Fig. 1).
5. Run low voltage wire from the humidity controller to
the template (Figs. 5 and 6).
6. Lay wire over one side of the foam gasket allowing
about 6 in. [152 mm] for connection to the humidity controller. Wire can enter the humidity controller case from
any direction.
NOTE: Do not position wire directly under the two stand-
off projections at the back of the case. If wire is under
these projections, the case will not seat tightly against
the gasket, causing air leakage and possible improper
operation.
CASE
TEMPLATE
GASKET
UP
M9264
69-0821 2
Loading...