Table of Contents
Advertisement
BURNER ORIFICE
Important: Use only factory authorized replacement parts.
If you lack the necessary skills to properly perform the
installation, you should not proceed, but get help from a
qualifi ed service technician.
Tools required:
•
3/4" Open-End Wrench
•
Phillips Head Screwdriver
•
Ratchet with 1/4" socket or 1/4" nutdriver
•
Ratchet with 1/2" socket.
Removing Inner Door/Manifold/Burner Assembly
1.
Set the gas control valve/thermostat to its lowest
setting by turning the knob counter-clockwise to the
VAC point (see Figure 3).
2.
Turn gas control switch to the "OFF" position and turn
"OFF" the gas supply to the unit (see Figure 3).
3.
Disconnect the electrical power to the water heater
from the wall outlet.
4.
Remove the outer door from the unit.
5.
Unplug all the electrical connections from the bottom
of the gas control valve/thermostat (see Figure 15).
6.
Using a 3/4" open end wrench remove the manifold
tube from the gas control valve/thermostat (turning
counter-clockwise for natural gas, clockwise for L.P.).
Grasp the manifold tube and push down slightly to
free the manifold tube from the gas control valve/
thermostat (see Figure 15).
7.
Remove the insulation pad on the inner door by cutting
it if necessary. Keep the insulation in a safe place for
reusing it later.
8.
Use a 1/4" nutdriver or 1/4" socket & ratchet to loosen
the 2 hex head screws on the inner door so the inner
door/manifold/burner assembly can be removed (see
Figure 15).
9.
Remove inner door/manifold/burner assembly by
grasping the manifold, rotating it to the left to clear the
igniter and fl ame sensor and pulling back. Care should
be taken when inner door and burner assembly passes
through jacket opening that it does not damage any
of the electrical wiring (see Figure 17).
Removing Burner Orifi ce
1.
Burner may be hot. Wait until burner has cooled
off. After noting the position of the condensation
drain hole on the top of the burner, turn the inner
door/manifold/burner assembly upsidedown. Using
a Phillips head screwdriver, remove and retain the 2
screws attaching the burner to the manifold pipe (see
Figure 18 & 19).
2.
Using a ratchet with 1/2" socket, remove the burner's
old orifi ce (Note: the burner orifi ces have different
threads dependent upon the gas type. Orifi ces for
natural gas have right-hand threads, orifi ces for L.P.
have leftt-hand threads (see Figures 18 & 19).
14
Installing Burner Orifi ce
1.
Using a ratchet with 1/2" socket, install the new
burner orifi ce (Note: the burner orifi ces have different
threads dependent upon the gas type. right-handed
threads for natural gas (turn clockwise to install)
and left-handed threads for propane gas (turn
counter-clockwise to install) (see Figures 18 & 19).
Note: Determine whether the orifi ce is tall or short and
DO NOT replace them with each other.
2.
Care MUST be taken to ensure the burner is installed
correctly on the inner door/manifold assembly. Position
the new burner upside down with the orientation of the
burner's condensation drain as noted in "Removing
Burner Orifi ce" step 1.
3.
Align the screw holes on the inner door/manifold
assembly. Using the two screws removed in step 1
above, installed the new burner to the inner door/
manifold assembly (rotate the assembly to visually
check the top portion of the burner assembly and
confi rm the orientation of the condensation drain hole
as shown in the illustration) (see Figure 18 & 19).
Caution Must Be Taken
Prior to installing the new inner door/manifold/burner
assembly, look inside the burner chamber to fully
understand the correct positioning of the burner assembly
and burner manifold tab. It may be necessary to use a
fl ashlight to ensure correct placement. Care must be taken
so as to not damage any electrical wiring or components
as you are installing the new inner door/manifold/burner
assembly.
Extra caution should be taken to ensure that electrical
wiring, fi berglass insulation or any other object is not
between door gasket and combustion chamber shield.
Note: If the burner door gasket (see Figure 9) is worn
or damaged it needs to be replaced. See section "Door
Gasket Replacement".
Reinstalling Inner Door/Manifold/Burner Assembly
1.
Insert the manifold/burner assembly in the
burner chamber compartment, making sure
that the tip of burner manifold tab engages in
the proper slot of the bracket (see Figure 16).
Important:
•
The tip end of the burner manifold MUST be placed
in the upper slotted portion for models with input rate
of 40,000 to 50,000 Btu/hr to obtain proper installation.
*
The tip end of the burner manifold MUST be
placed in the lower slotted portion for models with
input rate of 60,000 to 75,000 Btu/hr to obtain proper
installation.
2.
After confi rming no materials of any type are between
door gasket and combustion chamber shield, align
the screws on the inner door with the screw holes
on the combustion chamber and tighten with 1/4"
nutdriver or 1/4" socket & ratchet (see Figure 15).
After tightening the inner door screws, visually inspect
area around door gasket and skirt for spaces or
gaps. The door gasket MUST be sealed completely
in order for the water heater to perform properly.
Hide quick links:
Advertisement
Table of Contents
