American Water Heater VG6250T76NV Series 100 User Manual

21

The condensate trap may be primed by filling the CONDENSATE

U-ASSEMBLY with tap water while the water heater is not operating. 

The system is fully primed when the water level reaches the adaptor 

connected into the Tee. 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.

Do 

block or

plug any

hole in this

hex plug.

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. Two 3/8” condensate hoses should be connected to

the built in drain ports of blower outlet adaptor. If a VAA is installed, 

a 3/8” condensate hose should be connected to the barb fitting on it;

otherwise the unused barb fitting on vent pipe assembly #2 should be

plugged with one of the break-away plugs. See Figure 17.
Condensate neutralizer kits are available. Contact your distributor 

or Service Agency.

1.  This power vented water heater comes with blower assembly installed.
2.  After  unit  is  set  in  place,  make  sure  blower  assembly  is  still 

mounted securely. Make sure there is no damage to blower.

3.  Condensate  drains  from  three  locations  on  blower  assembly. 

See Figure 17. One flexible hose runs from bottom of blower

housing; two run from the ports of rubber connector at the outlet 

of blower. All these three condensate hoses are connected to 

barb fittings at vent pipe assembly #2. The hose from bottom

of blower housing is clamped by two clamps and the two hoses 

from rubber connector are harnessed by another clamp. Make 

sure there is no kink or twist.

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 National Electrical Code NFPA 70 

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.

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.

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.

2.  If the Vent Terminal is being installed on outside of a finished wall, it