Vertex GP6, Instruction Manual, Page: 16 / 36

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discussed above where each elbow is equal to 5 feet of straight pipe
(3" vent pipe) or 8 feet of straight pipe (4" vent pipe).
NOTE: This unit can be vented using only PVC (Class 160, ASTM D-
2241; Schedule 40, ASTM D-1785; or Cellular Core Schedule 40
DWV, ASTM F-891), CPVC (Schedule 40 /ASTM F-441), or ABS
(ASTM D-2661) pipe. The fittings, other than the TERMINATION
should be equivalent to PVC-DWV fittings meeting ASTM D-2665
(Use CPVC fittings, ASTM F-438 for CPVC pipe and ABS fittings,
ASTM D-2661/3311 for ABS pipe). If CPVC or ABS pipe and fittings
are used, then the proper cement must be used for all joints, including
joining the pipe to the Termination (PVC Material). If local codes do
not allow the use of the PVC termination when a material other than
PVC is used for venting, then an equivalent fitting of that material
may be substituted if the screen in the PVC terminal is removed and
inserted into the new fitting.
PVC Materials should use ASTM D-2564 Grade Cement; CPVC
Materials should use ASTM F-493 Grade Cement and ABS
Materials should use ASTM D-2235 Grade Cement.
If the water heater is being installed as a replacement for an existing
power vented heater in pre-existing venting, a thorough inspection
of the existing venting system must be performed prior to any
installation work. Verify that the correct material as detailed above
has been used, and that the minimum or maximum vent lengths
and terminal location as detailed in this manual have been met.
Carefully inspect the entire venting system for any signs of cracks
or fractures, particularly at the joints between elbows and other
fittings and the straight runs of vent pipe. Check the system for
signs of sagging or other stresses in the joints as a result of
misalignment of any components in the system. If any of these
conditions are found, they must be corrected in accordance with
the venting instructions in this manual before completing the
installation and putting the water heater into service.
NOTE: A. For water heaters in locations with high ambient
temperatures (above 100°F) it is recommended that CPVC or
ABS pipe and fittings be used.
B. A 22.5 degree elbow (2" vent
pipe) or a 45 degree elbow (3" and 4" vent pipe) with an installed
screen VENT TERMINAL must be used in all cases.
4. There will be some installations where condensate will be formed
in the horizontal runs of the vent system. This condensate will
run into the condensate boot attached to the blower and out the
fitting. The water heater is shipped with condensate hose that
attaches to the fitting on the condensate boot. No other Tee or
fitting is required. See Figures 17, 20 and 21.
CONDENSATE
This water heater is a condensing unit and requires a drain to be
located in close proximity to allow the condensate to drain safely. The
condensate drains from the unit at the exhaust tee located at the
bottom of the unit (see figure 16) and from two places on the blower
assembly (see figure 17). Condensate from this water heater is mildly
acidic. Please note that some local codes require that condensate is
treated by using a pH neutralizing filter prior to disposal.
NOTE: It is important that the condensate hose on the bottom of the
unit is not installed elevated above the clamp that is secured to the side
of the jacket, see figure 16. This must be true for the entire length of the
hose from the clamp to the exit into an appropriate drain. If these
instructions are not followed or if the condensate hose is blocked, water
will spill from the condensate trap. As with every water heater installation,
a drain pan should be used to prevent water damage to the surrounding
area. If necessary, a condensate pump with an incorporated reservoir
may be used to pump the water to an appropriate drain. To avoid
condensate spillage, select a pump with an overflow switch.
Caution must be used to ensure that the drain is free and clear of
debris and will not allow backflow through the condensate hose.
Consideration must be given to avoid freezing of the condensate
lines which could result in excessive build up of condensate inside
the water heater. Waterproof heat tape may be required to prevent
freezing of the condensate lines. Please ensure that the outlet of
the condensate drain does not create a slippery condition which could
lead to personal injury.
The condensate trap may be primed by filling the CONDENSATE
U-ASSEMBLY with tap water using the supplied hose while the water
heater is not operating. The system is fully primed when the hose is
lowered below the hose clamp on the side of the water heater and
water begins to flow out of the hose. In most installations the water
heater will self-prime the condensate trap during the first full heat-
up cycle. If a sound of air bubbling through water (gurgling) is heard
while the blower is operating after the first heat-up cycle, then turn
the unit off and contact your plumber or service representative.
If these instructions are not followed, the condensate build-up will
block the exhaust outlet, which will cause improper operation.
CONDENSATE SYSTEM - FIGURE 16
Condensate is likely to form in the venting system attached to this water
heater. The vent pipe should be sloped downward away from the blower
assembly (not less than 1/8" (3.2 mm) nor greater than 1/2" (12.7 mm)
per foot maximum). If the vent piping is vented level or sloped upwards
away from the blower assembly, then adequate means for draining
and disposing of the condensate needs to be made by the installer. In
either case, a 3/8" drain hose should be connected to the built-in drain
port. Prior to operating the water heater, make sure the removable cap
is installed on the second drain port (See Figure 17).
BLOWER ASSEMBLY INSTALLATION
1. This power vented water heater comes with the blower assembly installed.
2. After the unit is set in place, make sure the blower assembly is
still mounted securely. Also make sure that one of the drain ports