John Wood Envirosense Power Vent - Manual (Page 18)

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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 (30 cm) 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 blower assembly installed.
2. After the unit is set in place, make sure the blower assembly is still
mounted securely and make sure there is no damage to blower.
3. Condensate drains from a minimum of two locations, one being
the bottom of the blower housing must be used as shown in
figure 17. A cap must be installed on the rubber boot drain port
if not used for the third condensate line. A condensate hose
must be secured to form a “trap” as shown in figure 17 for
these condensate drain connections. These two hoses may be
connected together. The hose(s) should be routed to a suitable
drain. A fitting that may be used to join the two hoses from the
blower assembly is included in a supplied kit.
fIGure 17.
4. Make sure there is no packing material in the inlet or discharge
of the blower.
5. Make sure that the plastic tubing is still attached from the air
pressure switch to the port on the blower housing. Make sure
the plastic tubing is not folded anywhere between the pressure
switch and the blower housing.
6. Make sure the ON/OFF switch is in the OFF position and that
the outer harness is connected from the blower control box to
the connector on the bottom side of the gas valve.
7. If the outer harness is not factory installed, make sure the ON/
OFF switch is in the OFF position and then connect the outer
harness from the blower control box to the connector on the
bottom side of the gas valve.
8. Do not plug in power cord until vent system is completely installed.
The Power Vent operates on 110-120 Vac. therefore a grounded
outlet must be within reach of the 6 foot (1.8 m) flexible power cord
supplied with the vent (See Figure 1). The power cord supplied
may be used on a unit only where local codes permit. If local
codes do not permit use of flexible power supply cord:
A. Make sure the unit is unplugged from the wall outlet. Remove
the plastic top cap. Remove screws and open panel on the
front of the control box on the blower.
B. Cut the flexible power cord, leaving enough to be able to make
connections. Remove the strain relief fitting from the box.
C. Install a suitable conduit fitting inside the enclosure.
D. Splice field wiring into existing wiring using code authorized
method (wire nuts, etc).
E. Be certain that neutral and line connections are not reversed
when making these connections.
F. Ground heater properly. This water heater must be grounded
in accordance with the Canadian Electrical Code C22.1 and/
or local codes. These must be followed in all cases.
The water heater must be connected to a grounded metal,
permanent wiring system; or an equipment grounding
conductor must be run with the circuit conductors and
connected to the equipment grounding terminal or lead on
the water heater, see Figure 19.
G. Close the panel on the control box. Make sure that the access
panel is secured shut.
9. The blower discharge boot is made to accept only straight
sections of 2” pipe. To start off with an elbow, a short section
of the furnished pipe, a minimum of 2 inches (5.1 cm), must be
cut and glued into the end of the elbow that will mount on the
discharge boot.
InstallatIon of vent sYsteM
Before beginning installation of piping system thoroughly read the
section of this manual VENT PIPE PREPARATION.
If you are installing your system so that it vents through roof, please refer
to section titled INSTALLATION OF VERTICAL VENT SYSTEM.
vent terMInal InstallatIon, sIdewall
1. Install the vent terminal by using the cover plate as a template to
mark the hole for the vent pipe to pass through the wall. BEWARE
OF CONCEALED WIRING AND PIPING INSIDE THE WALL.