Bradford White M-I-MH40T6FLX - Manual (Page 10)

10
Combustion Air Supply continued-
All combustion air must be supplied from outdoors by one of the following
installation methods and as illustrated in Figure 2. The flow of combustion
and ventilating air must not be obstructed. Adequate air must be supplied for
combustion and ventilation. An insufficient supply of air will cause
recirculation of combustion products resulting in air contamination that may be
hazardous to life. Such a condition often will result in a yellow, luminous
burner flame, causing carboning or sooting of the combustion chamber,
burners and flue tubes with possible damage to the heater.
A minimum 34 in 2 (86.4cm 2 ) opening area is required to supply fresh air to the
water heater for combustion. Cut a 4” x 8 1/2” (10.2cm x 21.6cm) rectangular
opening in the outside access door panel with the bottom side of the opening
being 6” (15.3cm) from the bottom access door panel. A protective cover for
this fresh air opening is suggested to resist the entrance of rodents.
The water heater is to be secured in place using the supplied sheet metal
strapping and screws. Fasten the base of the water heater to the floor using
the screws provided. The perforated metal strapping must be fastened to the
top of the water heater and to the adjacent walls with the screws provided
(See Figure 2).
Water Connections
NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE
MAIN WATER SUPPLY VALVE.
After shutting off the main water supply, open a faucet to relieve the water line
pressure to prevent any water from leaking out of the pipes while making the
water connections to the water heater. After the pressure has been relieved,
close the faucet. The COLD water inlet is identified on the side of the water
heater and HOT water outlet is identified on the top of the water heater. The
fittings at the cold water inlet and hot water outlet are dielectric waterway
fittings with 3/4” NPT male thread. Make the proper plumbing connections
between the water heater and the plumbing system to the house. Install a
shut-off valve in the cold water supply line.
WARNING
Be sure protective cover still allows adequate fresh air opening area.
If sweat fittings are to be use, DO NOT apply heat to the nipples on the
water heater. Sweat the tubing to the adapter before fitting the adapter to
the water connections. It is imperative that heat is not applied to the
nipples containing a plastic liner. CAUTION