Bradford White SW-2-40R-L Installation And Operating Manual page 18

Water Connections continued-
INSTRUCTIONS FOR POTABLE CONNECTIONS
1. 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 and HOT
water outlet are identified on the top of the water heater. 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.
2. If this water heater is installed in a closed water supply system,
such as one having a back-flow preventer in the cold water
supply, provisions must be made to control thermal expansion.
DO NOT operate this water heater in a closed system without
provisions for controlling thermal expansion. Warranties do not
cover damages from thermal expansions such as pressure
bulges and/or deformities. A properly sized expansion tank will
alleviate most problems. Your water supplier or local plumbing
inspector should be contacted on how to control this situation.
3. After installation of the water lines, open the main water supply
valve and fill the water heater. While the water heater is filling,
open several hot water faucets to allow air to escape from the
water system. When steady streams of water flow through the
faucets, close them and check all water connections for
possible leaks.
4. NEVER OPERATE THE WATER HEATER WITHOUT FIRST
BEING CERTAIN THAT IT IS FILLED WITH WATER.
INSTRUCTIONS FOR BOILER CONNECTIONS
The indirect-fired heater connection labeled "To Boiler Return" should
be piped to the boiler return piping as close to the boiler as possible
and especially after any flow control or check valves in the space
heating return piping. The use of a union and a shut-off valve is
recommended. The use of a flow control or check valve is required to
prevent back flow through the water heater during operation of the
space heating system. Pipe and fittings between the boiler and
indirect-fired water heater should be ¾" diameter or larger.
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