ROOF JACK INSTALLATION

ROOF JACK KIT MODELS VENT KIT- 12 INCH (30.48 cm) 9002964005, VENT KIT - 32 INCH (81.28 cm) 9002965005,

VENT KIT - 60 INCH (152.40 cm) 9002966005 AND VENT KIT - 95 INCH (241.30 cm) 9002967005

FIGURE 13.

1.Cut 5 1/2” (13.97 cm) diameter holes through the roof and ceiling directly in line with the flue connection on top of the water heater. For a sloped roof, the roof hole may have to be enlarged to allow the roof jack to be installed vertically.

2.Telescope down the flue pipe in the roof jack assembly to a length that will project at least 6 inches (15 cm) below the finished ceiling before installing the roof jack assembly.

NOTE: Flue pipe joints have silicone seals that must remain in place. A soapy water solution sprayed around the seal area will enable the flue pipe and outer pipe below to telescope more freely.

3.Telescope down the outer pipe of the roof jack assembly to a length that will project at least 2” (5.08 cm) below the finished ceiling before installing the roof jack assembly, see Figure 14.

FIGURE 14.

4.Ease the roof jack assembly through the roof and ceiling openings. The roof jack flashing tilts up to 22.6° degrees for use on a sloping roof.

5.Use sealant or caulk on the roof to seal under flashing of the roof jack assembly. Use roof nails or screws on wood construction or sheet metal screws on metal roofs (nails and screws not provided), see Figure 15.

FIGURE 15.

NOTE: An optional Roof jack Extension Pipe (9002588) is required when the roof pitch is 5 1/2” (13.97 cm) or greater, or where local codes require the roof jack cap (outlet) terminate above the peak of the roof.

6.Remove the paper backing from the 1 1/2” x 9 3/4” (3.81 cm x 24.77 cm) woven tape seal (found attached to the heater top) and apply the seal around the flue collar of the water heater, see Figure 16 on page 12.

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A.O. Smith 315795-000 MH, FMD 40, FMD 50, FMD 30 instruction manual Roof Jack Installation

FMD 40, FMD 50, 315795-000 MH, FMD 30 specifications

A.O. Smith is a renowned brand in the field of water heating solutions, offering a range of efficient and durable water heaters tailored to meet diverse consumer needs. Among its extensive lineup, the A.O. Smith FMD series showcases several commendable models, including the FMD 30, FMD 40, and FMD 50, each boasting unique features and advanced technologies.

The A.O. Smith FMD 30 is a compact water heater designed for smaller households or limited spaces. With a 30-gallon capacity, it is engineered to provide ample hot water for everyday needs such as bathing, washing dishes, and laundry. The heater employs advanced insulation technology, ensuring heat retention and energy efficiency. The thermostatic control system allows users to easily adjust the water temperature to their preference, ensuring comfort while promoting safety.

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