lp-673 Rev. 000 Rel. 001 Date 8.30.18
27
Part 6 - Installing the Condensate Drain
This condensing high efficiency water heater has a condensate
removal system. Condensate is water vapor derived from
combustion products, similar to that produced by an automobile
when it is initially started. It is very important that the condensate
line is sloped down away from the heater and to a suitable drain.
The condensate line must remain unobstructed. If allowed to
freeze in the line or obstructed in any other manner, condensate
can exit from the water heater tee, resulting in potential water
damage to property.
When installing a condensate pump, select one approved for use
with condensing heaters and furnaces. The condensate pump
should have an overflow switch to prevent property damage from
spillage.
Condensate from the heater will be slightly acidic (pH from
3.2 to 4.5). Check with your local gas company to determine if
combustion condensate disposal is permitted in your area. Install
a neutralizing filter if required by local codes. If left untreated
and/or improperly disposed of condensate can lead to property
damages. DO NOT drain condensate onto finished surfaces.
Doing so will damage the surfaces. Damages caused by improper
disposal of condensate ARE NOT covered by product warranty.
NOTES:
1. Due to its efficient design, the water heater produces condensate
(water) as a normal by-product. This condensate is acidic, with a
pH level between 3 and 4. This condensate must be drained away
from the water heater and disposed in accordance with all local
regulations.
2. The condensate line should be as short and vertical as possible to
avoid freezing. If the line must run horizontally, it must be pitched at
least 1/4” per foot to properly drain. If this cannot be done, or a very
long length of condensate hose is used, increase the condensate
line to a minimum of 1” ID and place a tee in the line after the
condensate neutralizer to properly reduce vacuum lock in the drain
line, or install a condensate removal pump.
3. Use corrosion-resistant materials to drain condensate. Use
the included flexible plastic hose or ½” PVC and CPVC drain pipe
complying with ASTM D1785, F441, or D2665 may be used. Cement
LP-672-G
Rev. 5/18/18
NOTE: INSULATE WITH HEAT
TAPE TO PREVENT FREEZING
IN THE CONDENSATE TRAP
OR LINE.
Figure 19 - Internal Condensate
Trap
must comply with ASTM D2564 for
PVC pipe or F493 for CPVC pipe.
For Canadian applications, use CSA
or ULC certified PVC or CPVC pipe,
fittings, and cement.
4. A frozen condensate line could
result in a blocked condition
and an Er:29 Error Code. It is
very important to protect the
condensate line from freezing
temperatures or any type of
blockage. In installations that
Figure 20 - Condensate Piping with (1) Neutralizer to Drain, and (2) Neutralizer to Pump
may encounter sustained freezing
conditions, the use of heat tape is
recommended to avoid freezing
of the condensate trap and line. It
is also recommended to bush up
the condensate line size to 1” and
terminate condensate discharge as
close to the unit as possible. Longer condensate runs are more prone
to freezing. Damages due to frozen or blocked condensate lines ARE
NOT covered by warranty.
5. Support of the condensate line may be necessary to avoid blockage
of the condensate flow.
6. Local building codes may require an in-line neutralizer to be
installed (not included) to treat the condensate. If required by local
authorities, a condensate filter of lime crystals, marble, or phosphate
chips will neutralize slightly acidic condensate (p/n 7450P-212
available from HTP). Follow all the installation instructions included
with the neutralizer. If a neutralizer is installed, periodic replacement
of the limestone (or neutralizing agent) will be required. The rate of
depletion of the limestone varies with usage of the water heater.
During the first year of water heater operation, check the neutralizer
every few months for depletion.
7. Route the drain line to a nearby drain or condensate pump. If the
heater condensate outlet is lower than the drain, you must use a
condensate removal pump (kit p/n 554200 available from HTP).
8. An error will appear on the water heater display if condensate line
is blocked - Er: 29. The water heater will not operate with a blocked
condensate line. It is extremely important to have this condition
repaired by a qualified service technician.
CONDENSATE PIPING
(SUGGESTED SETUP FOR
CONDENSATE REMOVAL
TO FLOOR DRAIN)
LP-672-A
5/16/18
HORIZONTAL LINES MUST
N1100 CONDENSATE
NEUTRALIZER
BE INSTALLED WITH A PITCH
OF AT LEAST 1/4" PER FOOT
PIPE HANGERS MUST
BE USED TO SUPPORT
PIPING VERTICAL OR
HORIZONTAL
TO SUITABLE DRAIN
(NO FINISHED SURFACES)
1" X 3/4" PVC PIPE
REDUCER - SWEAT
3/4" PVC PIPE
SWEAT CONNECTIONS
THROUGHOUT
VENT
CONDENSATE HOSE
(SUPPLIED)
IMPORTANT!
WRAP CONDENSATE
LINES WITH HEAT TAPE
OR INSULATION
TO PREVENT FREEZING
3/4" FLEXIBLE
CONDENSATE PIPING WITH PUMP
PIPING
NEUTRALIZER
N1100 CONDENSATE
REDUCER - SWEAT
BE INSTALLED WITH A PITCH
CONDENSATE PUMP
554200 LITTLE GIANT
PIPING
RIGID PVC
TUBING
(SUGGESTED SETUP FOR
CONDENSATE REMOVAL
TO OUTSIDE SOURCE)
PIPING SUPPORTS
OF AT LEAST 1/4" PER FOOT
PIPE HANGERS
MUST BE USED
TO SUPPORT
VERTICAL OR
HORIZONTAL
HORIZONTAL LINES MUST
1" x 3/4" PVC PIPE
3/4" HOSE BARB
3/4" PVC PIPE SWEAT
CONNECTIONS
THROUGHOUT
LP-672-B
5/16/18
VENT
PIPING SUPPORTS
IMPORTANT!
WRAP CONDENSATE
LINES WITH HEAT TAPE
OR INSULATION
TO PREVENT FREEZING
TO SUITABLE DRAIN
(NO FINISHED
SURFACES)
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