American Standard Standard Residential, Руководство по эксплуатации, установке и обслуживанию, Страница: 9 / 44

6
VENT PIPE SIZE
It is important that you follow the guidelines in these instructions for sizing a vent pipe system. If a transition to a larger vent
size is required, the vent transition connection must be made at the blower outlet.
VERTICAL EXHAUST GAS VENT
Vertical exhaust gas vents must be installed with U.L. listed type B vent pipe according to the vent manufacturer’s
instructions and the terms of it’s listing.
It myst be connected to the water heater’s blower by a certified vent connector or by directly originating at the blower
outlet.
WATER PIPING
Piping and fittings should be installed in compliance with the installation drawing. Check for dip tube in cold water fitting
before connection of hot and cold water lines. If the indoor installation area is subject to freezing temperatures, water piping
must be propected. The water heater should be drained dif being shut down during freezing temperatures.
If solder connections are used, sweat tubing to the adaptor before fittind adaptor to the cold and hot water fitting. It is
imperative that no heat be applied to the water heater fitting as they may contain nometallic parts.
CAUTION OPERATING AN EMPTY OR PARTIALLY FILLED WATER
HEATER WILL RESULT IN DAMAGE TO THE TANK
Install the water pipping and fitting as shown in Figure 4.
1. Connect the cold water supply (3/4” NPT) to the fitting marked “C”.
Connect the hot watter supply (3/4” NPT) to the fitting marked “H”.
Important: Some models may contain energy saving heat traps to prevent the circulation
of hot water within the pipes. Do not remove the inserts within the heat traps.
2. The installation of unions in both the hot and cold water supply lines
is recommended for ease or removing the water heater for service
or replacement.
3. The manufacturer of this water heater recommends installing a
thermostatic mixing valve or an anti-scald device in the domestic hot
water line. These valves reduce the point-of-use temperature of the
water by mixing cold and hot water and are readily aviable for use.
4. Install a shut-off valve in the cold water inlet line. It shold be located
close to the water heater and be easily accessible. Know the location
of this valve and how to shut off the water to the heater.
5. A temperature and pressure relief valve must be installed in the
opening marked “Temperature and Pressure (T &P) ReliefValve” on
the water heater.
6. Add a discharge line to the opening of the T & P relief valve. Follow
the instructions under “Temperature and Pressure ReliefValve”.
7. After piping has been properly connected to the water heater, remove
the aerator at the nearest hot water faucet. Open the hot water
faucet and allow the tank to completely fill with water. To purge the
lines of any excess air, keep the hot water faucet open for 3 minutes
after a constant flow of water is obtained. Close the faucet. Check all
connections for leaks. Replace the aerator.
PRESSURE BUILD-UP IN CLOSED WATER
SYSTEMS
The water utility supply meter may contain
a check valve, back-flow preventer, or water
pressure reducing valve. This will create a
closed water system. During the heating cycle
of the water heater, water expands creating
a pressure build-up in the water system. A
temperature and pressure relief valve must be
installed on the water heater
(150 PSI maximum
pressure setting. See Temperature and Pressure
ReliefValve Page 8).
To prevent the temperature and pressure
relief valve from discgarging hot water, loss
of energy, and reduce the possibe build up of
lime on the water temperature and pressure
relief valve seat. An expansion tank must be
installed on the cold water supply line. For
every 50 US gallons of stored water, the
expansion tank must have a minimum capacity
of 1.5 US gallons See Figure 4.