KERR GEMINI 3T Installation, Operation And Service Manual

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KERR GEMINI 3T Installation, Operation And Service Manual Manual pdf 16 page image

154.0 ACCESSORIES INSTALLATIONBLOCKED VENT SWITCH (BVSO) FOR CANADIAN APPLICATION ONLYOil-fired appliances installed in Canada require a blocked vent switch system when installed ona chimney. A safety switch is included with the furnace to perform this function. It is theinstaller’s responsibility to install the switch in accordance with the instructions provided. Notapplicable for direct vent systems. Field Controls Model: WMO-1 (Manual Reset)Switch OperationBlocked vent switches are flue gas safety devices for detecting spillage of flue gases due to ablocked flue or inadequate draft. After detecting a problem, the switch de-energizes thesystem’s burner control.NEVER reset the switch unless the cause of the blockage has been corrected.Installation1) Drill a 5/8” hole in to the flue vent pipe near the appliance breech connection.2) This hole must be before the draft regulator, vertically or horizontally.3) Remove one of the securing nuts from the threaded tube of the safety switch.4) Tighten the other securing nut onto the pipe as far as possible (Figure 1).5) Insert the threaded tube end into the pierced hole of the flue vent pipe.6) Install the securing nut on the safety switch tube, which protrudes into the flue vent pipe.Tighten the nut securely (Figure 1).Figure 1 – Illustration Granby Industries Figure 2 - BVSO wiring diagramWiring Instructions (BVSO)Caution: Disconnect the electrical power when wiring the unit.Wire the blocked vent switch in accordance with The National Electrical Code and applicablelocal codes. Wire the safety switch (BVSO) in series with the thermostat and the fan timerrelay control (Figure 2).