Sediment Traps Filling the Water Heater | A.O. Smith GDV-40, GDV-50

SEDIMENT TRAPS

FILLING THE WATER HEATER

A drip leg (sediment trap) shall be installed as close to the inlet of the water heater as practical at the time of water heater installa- tion. The sediment trap shall be either a tee ﬁtting with a capped nipple in the bottom outlet or other device recognized as an ef- fective sediment trap. If a tee ﬁtting is used, it shall be installed in conformance with one of the methods of installation shown in Figures 8 and 9.

Contaminants in the gas lines may cause improper operation of the gas control valve that may result in ﬁre or explosion. Before attaching the gas line be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a drip leg (sometimes called a sediment trap) must be incor- porated in the piping. The drip leg must be readily accessible. Install in accordance with the “Gas Piping” section. Refer to the current edition of the “Natural Gas and Propane Installation Code” CAN/CSA-B149.1

	HOT WATER	COLD WATER
	OUTLET	INTLET
	UNION	SHUTOFF
	UNION	VALVE
		VALVE
		UNION
		TEMPERATURE
		AND PRESSURE
		RELIEF VALVE

DISCHARGE PIPE (DO NOT CAP OR PLUG)

	DRAIN PAN
DRAIN VALVE	6” MAXIMUM
	AIR GAP
FLOOR DRAIN

FIGURE 10

Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be ﬁlled with water. Water must ﬂow from the hot water faucet before turning “ON” gas to the water heater.

To ﬁll the water heater with water:

1.Close the water heater drain valve by turning the handle clockwise (). The drain valve is on the lower front of the water heater.

2.Open the cold water supply valve to the water heater. NOTE: The cold water supply valve must be left open when the water heater is in use.

3.To insure complete ﬁlling of the tank, allow air to exit by open- ing the nearest hot water faucet. Allow water to run until a constant ﬂow is obtained. This will let air out of the water heater and the piping.

4.Check all water piping and connections for leaks. Repair as needed.

VENTING

NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO THE OUTDOORS AND HAS ADEQUATE AIR SUPPLY TO AVOID RISKS OF IMPROPER OPERATION, FIRE, EXPLOSION OR ASPHYXIATION.

DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILATING AIR. ADEQUATE AIR FOR COMBUSTION AND VENTILATION MUST BE PROVIDED FOR SAFE OPERATION.

HIGH ALTITUDE INSTALLATIONS

Installations above 7,700 ft. (2347 m) require replacement of the burner oriﬁce in accordance with the “Natural Gas and Pro- pane Installation Code” CAN/CSA-B149.1. Failure to replace the oriﬁce could result in improper and inefﬁcient operation of the appliance, producing carbon monoxide gas in excess of safe limits, which could result in serious personal injury or death. Contact your gas supplier for any speciﬁc changes which may be required in your area.

186589-004, GDVT-50, GDV-75, GDV-40, GDV-50 specifications

A.O. Smith is a recognized name in the water heating industry, known for its reliable and efficient water heaters. Among its notable products are the GDV-50, GDV-40, GDV-75, GDVT-50, and 186589-004 models. These water heaters offer enhanced performance, energy efficiency, and modern technologies suited for residential and commercial applications.

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The A.O. Smith 186589-004 is an accessory designed for specific model enhancements that improve overall performance and safety. It may include additional safety features, such as high-temperature limit switches and automatic shut-off mechanisms that provide peace of mind for users.

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A.O. Smith GDV-40 Sediment Traps Filling the Water Heater, Venting, High Altitude Installations

Models: 186589-004 GDVT-50 GDV-75 GDV-40 GDV-50