Electrolux EP19WI30LS - Manual (Page 23)

21
Pressure Test
The appliance and its gas connections must be leak tested before placing the appliance in operation.
The appliance must be isolated from the gas supply piping system by closing its individual manual
shutoff valve during any pressure testing of the gas supply piping system at test pressures equal
to or less than ½ psig (3.5 kPa). We do not recommend pressure testing in excess of ½ psig
(3.5kPa). If it must be done, the appliance and its individual shutoff valve must be completely
disconnected from the gas supply piping system during the test process.
Pipe Sizing/Flexible Connectors
A gas shutoff valve must be installed on the supply line. Gas flex lines are not recommended unless
the minimum inside diameter is ¾” or greater and the rated capacity of the connector is equal to
or greater than the BTU capacity of the water heater. Gas piping shall be in accordance with local
utility company requirements and/or in the absence of local codes, use the latest edition of
National Fuel Gas Code (NFPA54GC), ANSI Z223.1. Size the gas line according to total btuh
demand of the building and length from the meter or regulator so that the following supply
pressures are available even at maximum demand.
WARNING
Natural Gas Supply Pressure
Min 4” WC
Max 10.5” WC LP Gas Supply Pressure
Min 8” WC
Max 14” WC
Reference Tools & Sample Calculations
The tables and samples below are for reference only. The professional sizing and installing the gas
line should always run the appropriate calculations before all installations.
CAUTION
Which Table to Use
r
'PS
/(
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XJUI
UIF
JOJUJBM
TVQQMZ
QSFTTVSF
BU
QPJOU
PG
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BU
UIF
NFUFS

GPS
FYBNQMF

JT

less than 8” WC, use the 0.5” WC pressure drop table (Table 1).
r
'PS
/(
JOTUBMMBUJPOT
XJUI
UIF
JOJUJBM
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QPJOU
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JT
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UIBO
PS
FRVBM
UP
u

WC, use the 3.0” pressure drop table (Table 2).
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'PS
BMM
-1
JOTUBMMBUJPO
VTF
5BCMF

The inlet pressure must be at least 5” WC for NG or 8” WC for LP for all appliances in the gas system.
If the inlet gas pressure drops below 5” WC for NG or 8” WC for LP, the heater may continue to operate,
but the other appliances in the house may experience flame loss or ignition failure, which can result in
gas leakage into the home. Refer to the NFPA 54 for details.
Please contact Electrolux Home Products, Inc. for details. For corrugated stainless steel tubing (CSST)
capacity tables, please consult with the manufacturer.