Kenmore HydroSense 153.33443, Owner'S Manual

13

This water heater shall not be connected to any heating 
systems or component(s) used with a non-potable water heating 
appliance.

All piping components connected to this unit for space heating 
applications shall be suitable for use with potable water.

Toxic chemicals, such as those used for boiler treatment shall 
not be introduced into this system.

Water supply systems may, because of such events as high line 
pressure, frequent cut-offs or the effects of water hammer among 
others, have installed devices such as pressure reducing valves, 
check valves, back fl ow preventers, etc. to control these types of 
problems.  When these devices are not equipped with an internal 
by-pass, and no other measures are taken, the devices cause 
the water system to be closed.  As water is heated, it expands 
(thermal expansion) and closed systems do not allow for the 
expansion of heated water.

The water within the water heater tank expands as it is heated 
and increases the pressure of the water system.  If the relieving 
point of the water heater’s temperature-pressure relief valve 
is reached, the valve will relieve the excess pressure.  

The 

temperature-pressure relief valve is not intended for the 
constant relief of thermal expansion.

  This is an unacceptable 

condition and must be corrected. It is recommended that any 
devices installed which could create a closed system have a 
by-pass and/or the system have an expansion tank to relieve the 
pressure built by thermal expansion in the water system.  Refer 
to the 

Thermal Expansion

 section under 

Troubleshooting

Guide

or contact local plumbing authority or local Sears Service Center 
on how to control this situation.

NOTE:

To protect against untimely corrosion of hot and cold 

water fi ttings, it is strongly recommended that di-electric 
unions or couplings be installed on this water heater when 
connected to copper pipe.

Figure 15 shows the typical attachment of the water piping to 
the water heater.  The water heater is equipped with 3/4” NPT 
water connections.

NOTE: If using copper tubing, solder tubing to an adapter 
before attaching the adapter to the cold water inlet 
connection.  Do not solder the cold water supply line directly 

to the cold water inlet.  It will harm the dip tube and damage 
the tank.

•   Look at the top cover of the water heater. The water outlet is 

marked “HOT”. Put two or three turns of tefl on tape around the 
threaded end of the threaded-to-sweat coupling and around 
both ends of the 3/4” NPT threaded nipple. Using fl exible 
connectors, connect the hot water pipe to the hot water outlet 
on the water heater.

•  Look at the top of the water heater. The cold water inlet is 

marked “COLD”. Put two or three turns of tefl on tape around 
the threaded end of the threaded-to-sweat coupling and 
around both ends of the 3/4” NPT threaded nipple. Using 
fl exible connectors, connect the cold water pipe to the cold 
water inlet of the water heater.

NOTE:

This water heater is super insulated to minimize 

heat loss from the tank. Further reduction in heat loss 
can be accomplished by insulating the hot water lines 
from the water heater.

INSTALLATION COMPLETED USING INSTALLATION KIT

FIGURE 15.