Thermador UCVM36FS Installation Instructions - Page 5
INTRODUCTION, GENERAL DESCRIPTION, Step 1: Plan the installation - problem
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Downdraft - Unit Blower / Duct Transition Box (Not Included) Fig. 1 Strain Relief INTRODUCTION GENERAL DESCRIPTION The complete downdraft system consists of the downdraft, a blower and a transition box if using an Inline or Remote Blower. A recirculation module is also available when ducting to the outside is not preferred or not possible. (See Fig. 1). The blower can be either integral (mounted on the vent intake in the cabinet under the cooktop), an inline (mounted between the kitchen and exterior wall anywhere within the duct line), or a remote (mounted on the roof or outside wall). When a remote or inline blower is used, a duct transition is mounted on the ventilator intake in place of the integral blower to connect the intake to the duct work. The duct transition must be purchased separately. The integral blower or duct transition can be mounted in different positions on the intake to route ductwork to avoid cabinet, building framing, utilities, etc. The downdraft system is available in 30inch or 36- inch. Intended for non-professional style cooktops only. A Recirculation Kit can be purchased separately and used in conjunction with the Integral Blower if ducting to the outside is not a viable option. Step 1: Plan the installation Carefully follow the planning procedures listed below (See Figure 2). Sketches are NOT intended to be a replacement for careful planning. A. Determine whether a remote, inline, or integral blower will be used. Remote and inline blower installation requires 4 wires plus a ground wire to run from the downdraft to the blower. B. Make sure that adequate cabinet and counter space has been provided and that the intake and blower will be accessible if service is required. C. Consider that cross drafts created by adjacent open windows, doors, air conditioning, old heating vents, recessed ceiling lights, and traffic patterns may affect performance. D. For gas cooktop installations make sure that a minimum 10 square inch opening is provided in the toe-kick or other cabinet area. Inadequate ventilation of the cabinet below the cooktop may result in flame outage when operating the vent system. E. Provide for air supply or "make-up air" to the room where unit will be installed. If "make-up air" is not provided, then problems, such as fireplace chimney downdrafts, could result. 5