GSW 72090 manual Exhaust Venting, Water Supply

Exhaust Venting

DRAFTHOOD

SCREW

TAB LEG

EXHAUST

FAN

SLOT

REVERSE

FLOW OF

GASES

Figure 9

Drafthood Installation

Figure 7 Air Moving Devices

Water Supply

Piping Installation

Vent Pipe System

Piping, fittings, and valves should be installed according to

This water heater is a Category 1, non-direct vented appli-

the installation drawing (Figure 10). If the indoor installation

ance.

area is subject to freezing temperatures, the water piping

The vent pipe must be installed in accordance with all local

must be

protected

by insulation. Water supply pressure

and provincial or state codes or, in the absence of such

should not exceed 550 kPa (80psi). If this occurs a pressure

codes, with the latest edition of “Natural Gas and Propane

reducing valve and/or an expansion tank may be required.

Installation

Code”

CAN/CSA-B149.1

in

Canada,

The pressure reducing valve should be placed on the sup-

“National Fuel Gas Code” ANSI Z223.1 (NFPA 54) in the

ply to the entire house in order to maintain equal hot and

U.S.A. The vent pipe must not be obstructed so as to pre-

cold water pressures.

vent the removal of exhaust gases to the outside atmos-

Important: Heat must not be applied to the water fittings on

phere.

the heater as they may contain nonmetallic parts. If solder

Note: The

horizontal

section of the vent

must

slope up

connections are used, solder the pipe to the adapter before

21mm per metre (1/4 in. per foot), (see Figure 8).

attaching the adapter to the hot and cold water fittings.

U.L. recognized fuel gas and carbon monoxide (CO) detec-

Install the water piping and fittings as shown in Figure 10.

tors are recommended in all applications and should be

Connect

the cold

water supply

to the fitting (3/4” NPT)

installed using

the manufacturer’s instructions

and local

marked “COLD” (or “C”). Connect the hot water supply to

codes, rules or regulations.

the fitting (3/4” NPT) marked “HOT” (or “H”).

Important: If you lack the necessary skills required to prop-

erly install this venting system, you should not proceed, but

IN A CLOSED SYSTEM USE EITHER:

1.THERMAL EXPANSION TANK

enlist the help of a qualified service technician.

2.PRESSURE RELIEF VALVE

COLD WATER

Drafthood Installation

INLET VALVE

HOT WATER

Hook the tab leg of the drafthood into the slot in the heater’s

OUTLET

top. Align the remaining legs with the hole/dimples and

secure the drafthood to the top with three screws as shown

in Figure 9. Do not alter the drafthood in any way. If you are

PIPE

PRESSURE REDUCING

INSULATION

replacing an existing water heater be sure to use the new

VALVE WITH BYPASS

UNION

drafthood supplied with the water heater.

COLD WATER

INLET

T E M P E R AT U R E A N D

PRESSURE RELIEF VALVE

DISCHARGE LINE 300mm

(12 in.) MAX (CANADA) OR

150mm (6 in.) MAX (U.S.A.)

ABOVE DRAIN

M A S S A C H U S E T T S :

I N S TA L L A VA C U U M

RELIEF IN COLD WATER

L I N E P E R S E C T I O N

19MGL 142

SLOPE UP 21mm PER METRE

(1/4 in. PER ft) MIN.

DRAIN LINE 19mm

(3/4 in.) ID MIN

Figure 8

Vent System

Figure 10 Example Of Water Piping Installation

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