A.O. Smith Water Heater installation instructions Ma,Nta,N, Piping Installation

	'_ LISTED VENT CAP
	2 FT. MINIMUM ABOVE ANY OBJECT
3 FT. MINIMUM	WITHIN 10 FT. HORIZONTALLY

Piping Installation

SUPPORT

Piping, fittings,

and

valves should be installed according

to the installation drawing (Figure 13). If the indoor

*MAINTAIN

TYPE

B DOUBLE

installation

area is subject to freezing

temperatures,

the

CLEARANCE

WALL

VENT PIPE

water piping must be protected

by insulation.

t

The water supply pressure should not exceed 80 psi. If

**MAINTAIN

this occurs,

a pressure

reducing

valve

with

a bypass

may

_ SPECIFIED

need to be

installed

in the cold

water

inlet

line. This

should

VENT

CLEARANCE

be placed on the supply

to the entire

house in order

to

CONNECTOR

maintain equal

hot and

cold water pressures.

SLOPE UP

1/4 IN. PER

FT.

IMPORTANT:

Heat

cannot be applied

to the water fittings

MINIMUM

1

on the heater as they may contain nonmetallic parts. If

solder connections

are used, solder the pipe to the adapter

VERTICAL GAS VENT SYSTEM WITH

before attaching the adapter to the hot and cold water

fittings.

TYPE B DOUBLE

WALL

VENT PIPE.

FIGURE

11.

IMPORTANT: Always use a good grade of joint compound

and be certain

that

all fittings are drawn up tight.

1.

Install the water

piping and fittings as shown

in Figure

LISTED

VENT CAP

13. Connect the cold water supply (3/4" NPT) to the

5 FT. MINIMUM

cold water inlet fitting. Connect the hot water supply

(3/4" NPT)

to the

hot water outlet fitting.

f

MAINTAIN

SPECIFIED

IMPORTANT:

Some

models may contain

energy saving

CLEARANCE

SUPPORT

heat traps to prevent the circulation of hot water within the

pipes. Do not remove the inserts within the heat traps.

STRAP.

*MA,NTA,N\

2.

The installation

of unions in both the hot and cold water

CLEARANCE

__SEAL

supply lines is recommended for ease of removing the

]

_ll

water heater for service or replacement.

3. The manufacturer of this water heater recommends

VENT

CONNECTOR

installing a tempering valve or an anti-scald

device

in the domestic

hot water line as shown in Figure

14.

CONNECTOR

UNUSED CHIMNEY

These valves reduce the point-of-use

temperature

of

1/4 IN. PER

FT.

-',=-_FLUE

OR MASONRY

MINIMUM

ENCLOSURE

the water

by mixing cold and hot water

and

are readily

available for use.

4.

If installing

the water heater in a closed water system,

VENTING THROUGH

A CHIMNEY WITH

install an expansion tank in the cold water line as

TYPE B DOUBLE WALL VENT PIPE.

specified under Closed System/Thermal Expansion.

FIGURE

12.

5.

Install a shut-off

valve in the cold water inlet

line. It

* Maintain vent pipe clearance requirements to local, state

should be located close to the water heater and be

easily accessible. Know the location of this valve and

and/or the "National Fuel Gas Code", ANSI Z223.1 (NFPA

how to shut off the water to the heater.

54)-current

edition.

** NFPA 211, Standard for Chimneys, Fireplaces, Vents, and	6. A temperature and pressure relief valve must be
	installed in the opening marked "Temperature and
Solid Fuel-Burning Appliances states that these chimneys are
	Pressure (T & P) Relief Valve" on the water heater.
intended to be installed in accordance with the installation
	A discharge line must be added to the opening of
instructions provided with each chimney support assembly.
	the T&P Relief Valve. Follow the instructions under
Minimum air space clearance to combustible materials should be
	Temperature and Pressure Relief Valve.
maintained as marked on the chimney sections.
	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 and check all connections for leaks.

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