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
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