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Forproperdrafthoodattachment,thedrafthoodlegsmay
beangledslightlyinward.
Placethedrafthoodlegsinthereceivingholesonthetopof
thewaterheater.Thelegswillsnapintheholestogivea
tightfit.Securethelegsofthedrafthoodwiththesupplied
drafthoodbrackets.
Placetheventpipeoverthedrafthood.Withtheventpipein
position,drillasmallholethroughboththeventpipeand
drafthood.Securethemtogetherwithasheetmetalscrew,
seeFigure18.
DP-J_FT HOOD VENT,_ U _
_ SCRE_ DP.AFT HOOD
, ,,
DRAFT HOOD
'_ _'_]',_"- VENT TO OUTDOORS
__,_ OR CHIMNEYBRACKET
FIGURE 18.
Obstructed or deteriorated vent systems may present serious
health risk or asphyxiation.
Breathing Hazard - Carbon Monoxide Gas
. Flue gases may escape if vent
_ ":::1::_:-'_.;_. pipe is not connected.
:,_f_'_ . Do not store corrosive chemicals
_:'_';" in vicinity of water heater.
• Chemical corrosion of flue and
"" vent system can cause serious
injury or death.
o Contact a qualified installer or
service agency.
Breathing carbon monoxide can cause brain damage
or death. Always read and understand instruction manual.
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach and process chemicals
are typical compounds which are potentially corrosive.
Gas Piping
The vent pipe from the water heater must be no less than the
diameter of the draft hood outlet on the water heater and must
slope upward at least 1/4 inch per linear foot (21 mm per meter),
see Figure 19.
S] °
CHIMNEY
f
FIGURE 19.
Fire and Explosion Hazard
• Do not use water heater with
any gas other than the gas
shown on the rating plate.
-Excessive pressure to gas
control valve oar cause serious
injury or death.
• Turn off gas lines during
installation.
-Contact qualified installer or
service agency.
All vent gases must be completely vented to the outdoors of the
structure (dwelling). Install only the draft hood provided with the
new water heater and no other draft hood.
Vent pipes must be secured at each joint with sheet metal screws.
There must be a minimum of 6 inches (153 mm) clearance
between single wall vent pipe and any combustible material.
Fill and seal any clearance between single wall vent pipe and
combustible material with mortar mix, cement, or other
noncombustible substance. For other than single wall, follow
vent pipe manufacturer's clearance specifications. To insure a
tight fit of the vent pipe in a brick chimney, seal around the vent
pipe with mortar mix cement.
Make sure the gas supplied is the same type listed on the model
rating plate. The inlet gas pressure must not exceed
14 inch water column (3.5kPa) for natural gas. The minimum
inlet gas pressure listed on the rating plate is for the purpose of
input adjustment. If the gas control valve is subjected to
pressures exceeding 1/2 pound per square inch (3.5kPa), the
damage to the gas control valve could result in a fire or explosion
from leaking gas.
If the main gas line shut-off serving all gas appliances is used, also
turn "OFF" the gas at each appliance. Leave all gas appliances
shut "OFF" until the water heater installation is complete.
Failure to have required clearances between vent piping and
combustible material will result in a fire hazard.
Be sure vent pipe is properly connected to prevent escape of
dangerous flue gases which could cause deadly asphyxiation.
A gas line of sufficient size must be run to the water heater.
Consult the current edition of National Fuel Gas Code ANSI
Z223.1/NFPA 54 and your gas supplier concerning pipe size.
There must be:
16
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