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Installation
Instructions
LOCATION (CONT)o
Required clearances:
There must be a 7" (17.5cm) clearance between any object
and the rear and sides of the water heater in the event service
is needed. A minimum 8" (20.3cm)clearance abovethe
water heater to remove the filter for cleaning and for service
access,and clear accessto the front of the water heater, is
recommended. Installationsthat require 6" clearance on the
sidesor rear of the water heater for earthquake straps are
alsoacceptable. In these cases, additional clearance must be
provided on the opposite side of the unit to allow for service
access.The hot and cold water plumbing and electrical
connectionsmust not interfere with the removal of the filter.
tf a separate GEducting kit is purchased,additional space
is required above and to the rear of the water heater for
installation.Consultthe ducting kit manual for specific
instructions. Seewww.geospring.com for details.
: (20 3crn
ADDITIONAL
PARTS NEEDED:
3/4" MNPT
Condensate
Drain Port
......
_,,
or
1 - Flexible or Rigid Drain Line (3/4") and
associated fittings
16
Catch Pan installation (If required)
Relief Valve Drain
._fCondensate
Drain
Catch Pan
Catch Pan
Drain
NOTE: A uxiliary catch pan MUST conform to local codes.
CatchPan Kitsare availablefrom the store where the water
heaterwas purchased,a builder store or any water heater
distributor.Thecatch pan should be 2"(5.1cm) minimum larger
than the Water Heater basediameter. To prevent corrosion
and improve DrainValveaccessit is recommendedthat the
water heater be placedon spacersinsidethe catch pan.
THERMAL EXPANSION
Determine if a check valve exists in the inlet water
line. It may have been installed in the cold water line as
a separate backflow preventer, or it may be part of a
pressure-reducing valve, water meter or water softener.
A check valve located in the cold water inlet line can
cause what is referred to as a "closed water system."
A cold water inlet line with no check valve or backflow
prevention device is referred to as an "open" water
system.
As water is heated, it expands in volume and creates
an increase in the pressure within the water system.
This action is referred to as "thermal expansion." In an
"open" water system, expanding water which exceeds the
capacity of the water heater flows back into the city main
where the pressure is easily dissipated.
A "closed water system," however, prevents the
expanding water from flowing back into the main
supply line, and the result of "thermal expansion" can
create a rapid and dangerous pressure increase in the
water heater and system piping. This rapid pressure
increase can quickly reach the safety setting of the relief
valve, causing it to operate during each heating cycle.
Thermal expansion, and the resulting rapid and repeated
expansion and contraction of components in the water
heater and piping system, can cause premature failure of
the relief valve, and possibly the heater itself. Replacing
the relief valve will not correct the problem!
The suggested method of controlling thermal expansion
is to install an expansion tank in the cold water line
between the water heater and the check valve (refer
to the illustration on page 15).The expansion tank is
designed with an air cushion built in that compresses
as the system pressure increases, thereby relieving the
over-pressure condition and eliminating the repeated
operation of the relief valve. Other methods of controlling
thermal expansion are also available. Contact your
installing contractor, water supplier or plumbing inspector
for additional information regarding this subject.
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