Honeywell H808C User's Manual
Contents
1. 6C E HUMIDITY RISE DEHUMIDIFIER EXHAUST FAN H46C E CONTROLLER OR AIR CONDITIONER A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M9297 WIRING All wiring must comply with local codes and ordi nances Make wiring connections according to to dehu midifier instructions if available otherwise see typical wiring diagrams in Figs 5 and 6 Settings HUMIDITY CONTROLLER ADJUSTMENT The humidity comfort range of a living space is gener ally between 25 and 50 percent RH However as the outdoor temperature changes the humidity level on the humidity controller may need to be reset to assure maxi mum comfort To reduce the relative humidity reduce the set point ap proximately three percent RH every 24 hours To increase the relative humidity increase the set point approximately three percent RH every 24 hours WALL MOUNT HUMIDITY CONTROLLER Set the humidity set point according to the prevailing outdoor temperature to provide optimum relative humidity control for most installations Adjust the humidity level to a particular structure using the procedure above DUCT MOUNT HUMIDITY CONTROLLER If the temperature at the humidity controller location on the return air duct is less than 80 F 27 C use the procedure for wall mounted humidity controllers If the air surrounding the humidity controller is greater than 80 F 27 C reset the recommended settings to compensate for the high2. Honeywell 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 W H808C1029 Premier White W 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 ee HCM 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 screwdriv
3. PLATE H 22 y PEEL BACKING IL FROM TEMPLATE AND APPLY TO DUCT V AIZPZP T TT P P CE PUNCH AND DRILL DE e TWO 3 32 IN 3 mm zA MOUNTING HOLES 4 DRILL MINIMUM OF TWELVE 1 4 IN 7 mm HOLES OR DRILL OR PUNCH CORNER HOLES AND CUT OUT SQUARE ON SOLID LINE TEMPLATE Fig 5 Typical parallel wiring diagram of H808C with T87F Q539A combination for dehumidification and mildew control H808C FILTER LIGHT T87F Q539A INTERNALSCHEMATIC FIXED COOL TEMPERATURE ANTICIPATOR FALL ADJUSTABLE HEAT OFF COOL ANTICIPATOR A PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED A HEATING DAMPER MOTOR IF USED A CLOGGED FILTER SWITCH OR COOLING PANEL CONNECTION HEATING RELAY OR VALVE COIL COOLING CONTACTOR COIL M18627 Fig 6 Typical series wiring diagram of H808C with T87F Q539A combination for dehumidification and mildew control H808C FILTER LIGHT T87F Q539A INTERNALSCHEMATIC FIXED COOL TEMPERATURE ANTICIPATOR FALL ADJUSTABLE HEAT OFF COOL AUTO FAN ON 2 ANTICIPATOR 6 PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED VAN HEATING DAMPER MOTOR IF USED A CLOGGED FILTER SWITCH OR COOLING PANEL CONNECTION HEATING RELAY OR VALVE COIL COOLING CONTACTOR COIL M18626 69 0821 Fig 7 Typical wiring diagram for H4
4. er ambient temperature High ambi ent temperatures will cause the humidity controller to control at an increased setting To determine the compensated set point for surface mounted humidity controllers with high ambient temperatures use the following procedure 1 With a bulb type thermometer accurately determine the surrounding duct temperature at the humidity controller location 2 Decrease the recommended setting about five percent for each 5 F 3 C above 80 F 27 C at the humidity controller For example if the humidity controller is set at 25 per cent and the temperature at the humidity controller is 90 F 32 C the compensated set point should be 15 percent This is the 25 percent setting less 10 percent for the 10 F 6 C above ambient temperature Checkout Place the system in operation and observe through at least one complete cycle to make certain that all compo nents are functioning properly Honeywell Home and Building Control Honeywell Inc 1985 Douglas Drive North 740 Ellesmere Road Golden Valley MN 55422 Scarborough Ontario MIP 2V9 Printed in U S A Home and Building Control Honeywell Limited Honeywell Limit e Helping You Control Your World QUALITY IS KEY
5. er 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 assem bly 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 A S M9262 Fig 2 Wiring connections on humidity controller QUICK CONNECT WIRE LEAD A WIRE NUT HUMIDIFIER LEADWIRE s M9263 J F 3 94 OHoneywell 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 humid ity controlle
6. r ALTERNATE LOCATIONS RETURN AIR RETURN Fo AIR 15 in 381 mm MINIMUM 6 in 152 mm gt MINIMUM BEST LOCATION RETURN AIR DUCT M9277 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 con troller 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 69 0821 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 assem bly 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 ZZ LOCATE TEM
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