Whirlpool SG1J4040T3NOV 5K Special Applications, Combination Space Heating/Potable, Water System

Figure 15B		• Pumps, valves, piping and fittings must be compatible
T&P Relief Valve Insulation		with potable water.
	T&P Relief Valve Insulation	• A properly installed flow control valve is required to pre-
		vent thermosiphoning. Thermosiphoning is the result
		of a continuous flow of water through the air handler
		circuit during the off cycle. Weeping (blow off) of the
	Manual Relief Lever	temperature and pressure relief valve			(T & P) or higher
		than normal water temperatures are the first signs of
		thermosiphoning.
		• The domestic hot water line from the water heater
	T&P Relief Valve	should be vertical past any tempering valve or supply
		line to the air handler to remove air bubbles from the
	T&P Relief Valve	system. Otherwise, these bubbles will be trapped in the
	Drain Line	air handler heat exchanger coil, reducing the efficiency.
T&P Relief Valve and Pipe Insulation (Some Models)		• Do not connect the water heater to any system or
		components previously used with non-potable water
1. Locate the T&P Relief Valve on the water heater.		heating appliances when used to supply potable water.
2.	Locate the slit running the length of the insulation.	Some jurisdictions may require a backflow preventer
3 Spread this slit open and slip it over the T&P Relief Valve.
		in the incoming cold water line. This may cause the
	See Figure 15B. Apply gentle pressure to the insulation
		temperature and pressure relief valve on the water heater
	to ensure it is fully seated on the T&P Relief Valve. Once
		to discharge or weep due to expansion of the heated water.
	sealed secure the insulation with a section of tape.
		A diaphragm-type expansion tank suitable for potable
	IMPORTANT: The insulation or tape should not block
		water will normally eliminate this weeping condition. Please
	or cover the T&P Relief Valve drain opening. Also the
		read and follow the manufacturer’s instructions for the
	insulation or tape should not block or hinder access to the
		installation of such tanks.
	T&P Relief valve manual relief lever.
		Also see “Water System Piping” (Page 12) for additional
4. Next locate the hot water (outlet) & cold water (inlet) pipes
	to the water heater.	instructions on the safe and correct installation and
5. Select one of the sections of pipe insulation and locate the		operation of this water heater.
	slit that runs the length of the insulation.	Figure 16
6. Spread the slit open at the base of the insulation and slip		Typical Tempering Valve Installation
	it over the cold water (inlet) pipe. Apply gentle	Combination Space Heating/Potable
	pressure along the length of the insulation to ensure it is	Water Heating System
		Domestic
	fully seated around the cold water pipe. Also ensure that
		Hot Water
	the base of insulation is flush with the water heater. Once	Tempering	Out	Cold	Flow Control
	seated, secure the insulation with a section of tape.	Valve		Water	Valve
7.	Repeat steps 5 through 6 for the hot water (outlet) pipe.	Hot		Inlet	Pump
					In
		Water
Special Applications					Out
		Out
		Unions
Combination Space Heating/Potable				To	Coil
Water System				Air
				Handler
Some water heater models are equipped with inlet/outlet					Air
tappings for use with space heating applications. If this				Shut-off
					Handler
water heater is to be used to supply both space heating				Valve
and domestic potable (drinking) water, the instructions
listed below must be followed.

•	The unit must be set to standard mode (See Operating
	the Temperature Control System section).	Drain Pan Drain	Massachusetts code
•	Be sure to follow the manual(s) shipped with the air		does not allow this
	handler system.		type of installation.

•This water heater is not to be used as a replacement for an existing boiler installation.

•Do not use with piping that has been treated with chromates, boiler seal or other chemicals and do not add any chemicals to the water heater piping.

•If the space heating system requires water tempera- tures in excess of 115°F, a tempering valve or an anti- scald device should be installed per its manufacturer’s instructions in the domestic (potable) hot water supply to limit the risk of scald injury.

Solar Installation

If this water heater is used as a solar storage heater or as a backup for the solar system, the water supply temperatures to the water heater tank may be in excess of 115°F. A tempering valve or other temperature limiting valve must be installed in the water supply line to limit the supply temperature to 115°F. The unit must be set to standard mode (See Operating the Temperature Control System section). NOTE: Solar water heating systems can often supply water with temperatures exceeding 180°F and may result in water heater malfunction.

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