Amtrol whs-series Required Components and Accessories Checklist, Heat Exchanger Pressure Drop

Chlorine Aggressive Water: The water quality can significantly influence the life of this Product. You should test for corrosive elements, acidity, total solids and other relevant contaminants, including chlorine and treat your water appropriately to insure satisfactory performance and prevent premature failure.

Note: Inspect for shipping damage and notify freight carrier or store where purchased immediately if damage is present. To avoid risk of personal injury and property damage, if the product appears to be malfunctioning or shows signs of corrosion, call a qualified professional immediately. Current copies of the Product Manual can be obtained at the place of purchase. Use proper safety equipment when installing.

EXPLOSION HAZARD. The pressure of the heat transfer medium must be limited to a maximum of 30 psig by an approved safety or relief valve on your boiler. The water heater pressure must be limited to 150 psig maximum by the installation of a temperature and pressure relief valve (included). The relief tube must be plumbed to a suitable drain per code. No reducing coupling or other

restriction may be placed in this line.

This Product, like most Products under pressure, may over time corrode, weaken and burst or explode, causing serious or fatal injury, leaking or flooding and/or property damage. To minimize risk, a licensed professional must install and periodically inspect and service the Product. A drip pan connected to an adequate drain must be installed if leaking or flooding could cause property damage. Do not locate in an area where leaking could cause property damage to the

area adjacent to the appliance or to lower floors of the structure.

EXPLOSION OR RUPTURE HAZARD. A relief valve must be installed to prevent pressure in excess of local code requirement or maximum working pressure designated in the Product Manual, whichever is less. Do not expose Product to freezing temperatures or temperatures in excess of the maximum rated

operating temperature.

If not installed by the boiler manufacturer, install a low water cut-off or pressure reducing valve on your boiler so that leaking will not result in a dry boiler which if the boiler

continues to fire, will cause an explosion hazard.

This unit must be installed as a separate heating zone. Do not connect this unit to an existing heating zone or feed boiler water directly through the coil as dangerous over-heating

will result.

Do not drain this appliance before shutting off the supply valve and opening the relief valve or another downstream fixture, as it will damage this unit. A vacuum breaker should be installed to avoid damaging the liner. Damage to the unit and leakage

can occur if a vacuum breaker is not installed.

USE GLYCOL ONLY WITH DOUBLE-WALLED HEAT EXCHANGER MODELS. Avoid risk of ingesting a toxic glycol fluid. The heat transfer medium should be water. If glycol must be used, it should only be used with double-walled heat

exchangers and closely monitored for leakage.

CALIFORNIA PROPOSITION 65 WARNING! This product contains a chemical known by the State of California to cause cancer and to cause birth defects or other reproductive harm. (California Installer/Contractor - California law requires that this notice be given to consumer/end user of this product.) For more information:

www.amtrol.com/prop65.htm

As in all plumbing products and water storage vessels, bacteria can grow in this Product, especially during times of non-use. Consult your local plumbing professional regarding any steps you may wish to take to safely disinfect your home’s

plumbing system.

EXPLOSION OR RUPTURE HAZARD! A relief valve must be installed to prevent pressure in excess of local code requirement or maximum working pressure designated in the

Product Manual, whichever is less. At least once every 3 years or if discharge is present, a licensed contractor should inspect the temperature and pressure relief valve and replace if corrosion is evident or the valve does not function. FAILURE TO INSPECT THIS VALVE AS DIRECTED

COULD RESULT IN UNSAFE TEMPERATURE OR PRESSURE BUILD-UP WHICH CAN RESULT IN PRODUCT FAILURE, SERIOUS INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE AND VOID THE PRODUCT WARRANTY.

Required Components and Accessories Checklist

MODEL	CIRCULATOR	ZONE VALVE	SHUTOFF	VACUUM	RELIEF	THERMAL EXPANSION		DRAIN
			VALVE	BREAKER	VALVE		TANK
					150 psig/210°F	60	Gal. Models: 4.4 Gal.
WHS Models	See Chart	Full Port	4	1		80	Gal. Models: 4.4 Gal.	Included
					Included
						120	Gal. Models: 4.4 Gal.+
DC Models	See Chart	Full Port	6	1	150 psig/210°F	80	Gal. Models: 4.4 Gal.	Included
					Included	120	Gal. Models: 4.4 Gal.+

All installations require an adequate amount of sealing tape or pipe dope for threaded joints. See heat exchanger pressure drop chart to determine pump head requirements.

Heat Exchanger Pressure Drop

Pressure Drop (FT)

20

15

10

5

0

Double Wall Heat Exchanger

Single Wall Heat Exchanger

0	2	4	6	8	10	12
			Flow (GPM)

		If a steel	hydropneumatic tank is in place,	boiler system has an existing expansion tank and the boiler
		replace it	with a properly sized diaphragm	temperatures are being changed, resize the existing diaphragm
	expansion tank.	Otherwise, significant heat transfer problems can		expansion tank.
occur by causing air to be trapped in the heat exchanger. If the