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Honeywell H8908B Installation Instructions Manual

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APPLICATION
The H8908B Humidistat and H8908C Dehumidistat
(humidity controllers) provide automatic low voltage
control of humidifiers and dehumidifiers or ventilators,
respectively, in central heating and air conditioning
systems. They have a spst, snap-acting, dust-proof
switch and are designed for wall or surface duct
mounting.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on
the product 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.
CAUTION
Personal Injury Hazard.
Power supply can cause electrical shock.
Disconnect power supply before beginning
installation.
Location and Mounting
The styling of the H8908 is designed to blend with the
latest T8600 family of Honeywell Chronotherm® IV
Deluxe Programmable Thermostats. A mounting
template is included for mounting the H8908 next to the
T8600. The H8908 can also be mounted at any other
convenient location in the living area or equipment room.
See Fig 1.
NOTE: The H8908 electrical connections are not
shared with the thermostat.
® U.S. Registered Trademark
Copyright © 2002 Honeywell •
H8908C Dehumidistat
•All Rights Reserved
H8908B Humidistat
INSTALLATION INSTRUCTIONS
HOLE FOR WIRING
THE DUCT MOUNTING
INSTALLATIONS
Fig. 1. H8908B Humidistat.
Wall Mounting
IMPORTANT
Mount the control in an area with average room
temperature and average relative humidity.
The following mounting instructions are for mounting the
H8908 on the wall next to the T8600. When installing the
H8908 at another location, modify the procedure to fit the
installation.
1. Hold the mounting template (included) next to the
T8600. Select the mounting side for the H8908.
The template is reversible for mounting on either
the left or right side of the T8600. See Fig. 2.
2. Mark the holes for the two mounting screws
(included). Then mark the hole for the low voltage
wiring on the template that corresponds with the
side selected in step 1.
3. Remove the template and drill the holes.
4. Run low voltage wiring to the location and pull
about 6 in. (152 mm) of wire through the hole.
5. Plug the hole with nonflammable insulation to pre-
vent drafts from affecting the control operation.
6. Remove the H8908 case from the base. See
Fig. 1.
7. Position the base on the wall with the arrow up.
CASE REMOVAL
SLOT
M13371
69-1341EF
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Summary of Contents for Honeywell H8908B

  • Page 1 H8908B Humidistat H8908C Dehumidistat INSTALLATION INSTRUCTIONS APPLICATION The H8908B Humidistat and H8908C Dehumidistat (humidity controllers) provide automatic low voltage control of humidifiers and dehumidifiers or ventilators, respectively, in central heating and air conditioning systems. They have a spst, snap-acting, dust-proof switch and are designed for wall or surface duct mounting.

  • Page 2: Duct Mounting

    H8908B HUMIDISTAT/H8908C DEHUMIDISTAT 8. Use the two 1 in. (25 mm) mounting screws to secure the base to the wall. ALTERNATE LOCATION MOUNTING RETURN RETURN THERMOSTAT TEMPLATE WALLPLATE 6 in. (152 mm) 15 in. (381 mm) MINIMUM MINIMUM BEST LOCATION...
  • Page 3 H8908B HUMIDISTAT/H8908C DEHUMIDISTAT WIRING (HOT) POWER FAN CONTROL H8908B SUPPLY CAUTION DPST TRANSFORMER SWITCHING Personal Injury Hazard. RELAY Power supply can cause electrical shock and injury. 2-SPEED Disconnect power supply before installation or HUMIDIFIER MOTOR servicing. All wiring must comply with applicable local codes, ordinances and regulations.

  • Page 4: Humidity Control Adjustment

    H8908B HUMIDISTAT/H8908C DEHUMIDISTAT ADJUSTMENTS CHRONOTHERM ® IV THERMOSTAT H8908C Humidity Control Adjustment To maintain optimum humidity control without causing condensation on cold surfaces such as windows, the homeowner must adjust the setpoint as the outdoor temperature changes. HEATING RELAY OR...

  • Page 5: Notice D'installation

    T8600 Chronotherm® IV de 4. Passer les fils basse tension jusqu’à Honeywell. Un gabarit est compris afin de d’installer le l’emplacement choisi, puis les sortir (environ 6 po) H8908 près d’un T8600. Le H8908 peut également être par le trou pour les raccorder aux bornes.

  • Page 6: Montage En Gaine

    HUMIDISTAT H8908B, DÈSHUMIDISTAT H8908C 8. Fixer la base au mur à l’aide de 2 vis de 25 mm (1 po). AUTRE EMPLACEMENT IMPORTANT REPRIS REPRIS Utiliser du fil de calibre 18 à 22 pour un raccordement adéquat. 9. Raccorder les fils basse tension aux conducteurs...
  • Page 7 HUMIDISTAT H8908B, DÈSHUMIDISTAT H8908C RACCORDEMENT RÉGULATEUR DU VENTILATEUR MISE EN GARDE (SOUS H8908B TENSION) Risque de blessure. RELAIS DE TRANSFORMATEUR COMMUTATION L’alimentation électrique peut provoquer des BIPOL., UNIDIR. chocs électriques et des blessures. Couper l’alimentation avant de procéder à MOTEUR DU l’installation ou à...

  • Page 8: Réglage Du Régulateur D'humidité

    Laisser le système fonctionner pendant un cycle complet pour s’assurer que tous les composants du système fonctionnement correctement. Solutions de régulation et d'automatisation Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35, Dynamic Drive Golden Valley, MN 55422 Scarborough (Ontario) M1V 4Z9 Imprimé...

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