User manual FIELD CONTROLS 01984600

[. . . ] Place the pre-wired control box/thermal safety switch assembly on top of the water heater. Select a location for mounting the control box, so that the water heater's damper cable will reach the socket provided inside the control box, and the control box damper cable will reach the damper motor. NOTE: The pressure switch on the control box must be mounted vertically, see the warning on the pressure switch. [. . . ] Mount the control box onto the water heater in the location selected, using installer-supplied sheet metal screws though the four dimpled holes in the base of the control box. WARNING: DO NOT INSTALL SCREWS INTO A RACEWAY OR OTHER ENCLOSURE CONTAINING WIRING OR ELECTRICALLY LIVE PARTS!MOUNT THE THERMAL SAFETY SWITCHES (Figure 2) 1. Select locations for the two pre-wired thermal safety switches on the draft hood. The thermal safety switches should be mounted at right angles to each other, and on the side of the draft hood that is nearest to any potential source of depressurization of the structure (vent fans, oven hoods etc. ). Mark the locations of the thermal safety switches, and drill holes for the #10-24 mounting screws provided. Mount the switches onto the draft hood using the screws, flat and serrated washers, and nuts provided. Adjust the position of each switch such that the edges of the sensors are 1/8" from the edge of the draft hood. Secure any excess cable with the cable clamps provided. II. Figure 2 III. CONNECT TO APPLIANCE CONTROL AND DAMPER (Figure 3) 3. Wire the venter motor and controls in accordance with the National Electrical Code, manufacturer's recommendations and/or applicable local codes. Check ground circuit to make certain that the unit has been properly grounded. The wiring should be protected by an overcurrent circuit device rated at 15 amperes. CAUTION must be taken to ensure that the wiring does not come into contact with any heat source. All line voltage and safety control circuits, between the venter and the appliance, must be wired in accordance with the National Electrical Code for class one wiring or equivalent methods. VIII. SET PRESSURE SWITCH AND PERFORM CHECK-OUT PROCEDURE: WARNING: The adjustment screw on the pressure switch MUST be set before putting the appliance into service. Reconnect power to the water heater and control box source(s). Disable all ventilation and other equipment that may affect the air pressure in the area of the water heater, and open a nearby door or window if possible, to ensure that the air pressure in the water heater area is neutral. Create a call for heat from the water heater if necessary, by running hot water or temporarily resetting the thermostat. The automatic damper should begin opening, and after a short delay, the draft inducer should begin running and the burner should fire. [. . . ] The automatic damper should begin opening, and after a short delay, the draft inducer should begin running and the burner should fire. If the burner does not fire with the damper open and the draft inducer running, turn the pressure switch adjusting screw counterclockwise until the burner fires. Allow burner to operate 5 minutes, then while the burner is still firing turn the pressure switch adjusting screw clockwise until the burner shuts off. [. . . ]