HTP SSU-119CB - Manual (Page 5)

5
LP-32 Rev. 3.25.14
B. LOCATING THE STORAGE TANK
This storage tank is certified for indoor use only. DO NOT INSTALL OUTDOORS. Outdoor installations ARE NOT covered by warranty.
Choose a location for the storage tank as centralized to the piping system as possible. Also, locate the storage tank and domestic water
piping where it will not be exposed to freezing temperatures. All piping should be insulated. Additionally, place the storage tank so that
the drain, controls, and inlets/outlets are easily accessible.
This storage tank must be installed vertical on a level surface.
Locate the storage tank where any leakage from the relief valve, related piping, tank, or connections will not result in damage to
surrounding areas or lower floors of the building. The storage tank should be located near a floor drain or installed in a drain pan. HTP
will NOT be held liable for leakage damages.
Figure 2
If you do not provide the minimum clearances shown, it might not be possible to service the storage tank without removing it from the
space.
C. WATER CHEMISTRY REQUIREMENTS
Chemical imbalance of the water supply may affect efficiency and cause severe damage to the storage tank and associated equipment.
HTP recommends having water quality professionally analyzed to determine whether it is necessary to install a water softener. It is
important that the water chemistry on both the domestic hot water and central heating sides are checked before installing the storage
tank, as water quality will affect the reliability of the system. Failure of a storage tank due to lime scale build-up, low pH, or other
chemical imbalance IS NOT covered by the warranty.
Operating temperatures above 135 o F will further accelerate the build-up of lime scale and may shorten the service life of the storage
tank. Failure of the storage tank due to lime scale build-up on the heating surface, low pH, or other chemical imbalance IS NOT covered
by the warranty.
Outlined below are water quality parameters which need to be met in order for the system to operate efficiently for many years.
Water Hardness
Water hardness is mainly due to the presence of calcium and magnesium salts dissolved in water. The concentration of these salts is
expressed in mg/L, ppm, or grains per gallon as a measure of relative water hardness. Grains per gallon is the common reference
measurement used in the U.S. water heater industry. Hardness expressed as mg/L or ppm may be divided by 17.1 to convert to grains
per gallon. Water may be classified as very soft, slightly hard, moderately hard, or hard based on its hardness number. The minerals in
the water precipitate out as the water is heated and cause accelerated lime scale accumulation on a heat transfer surface. This lime
scale build-up may result in premature failure of the storage tank. Operating temperatures above 135
o
F will further accelerate the build-
up of lime scale and may shorten the service life of the storage tank.