Bradford White M-I-MH40T6FLX - Manual

ROOF JACK INSTALLATION INSTRUCTIONS
(FOR MANUFACTURED HOME FLAMMABLE VAPORS IGNITION RESISTANT
WATER HEATERS)
Page 1 238‐49397‐00A 6/11
Figure 1
Step 1. Determine final installation
location of the water heater.
Refer to the installation and
operation instructions provided
with the water heater to allow
for appropriate clearances to
combustible materials.
Step 2. Cut a 5 1/2” - 7 1/4” diameter
hole in the ceiling and roof
directly above the flue outlet
(water heater centerline).
Step 3. Align the water heater flue with
the opening in the ceiling and
roof.
Step 4. Apply a non-hardening mastic
on the roof around the opening
to form a weather seal with the
roof jack flashing.
NOTICE
An intake pipe is required for
water heaters that are NOT
flammable Vapor Ignition
Resistant. Refer to
Manufacturer of the water
heater for Roof Jack Kit with
air intake if required.
Step 5. Insert the roof jack into the
opening in the roof and ceiling
and fasten the flashing of the
roof jack to the roof with the
sheet metal screws provided.
Apply additional mastic to
complete the weather seal
(see Figure 2).
Step 6. If optional ceiling plate is used,
place over outer pipe against ceiling and secure with (4) screws (see Figure 2).
Step 7. Slip the ø3” vent connector extension (shipped telescoped in the roof jack) down over the draft
diverter which attaches to the water heater (see Figure 3).
Step 8. The vent joints must be sealed after the vent kit is installed. This kit will include silicone
band(s) to be used for sealing the vent joints.
Step 9. Clamp the vent connector extension to the water heater draft diverter using (2) sheet metal
screws provided (see Figure 3).