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RENEWAL PARTS IDENTIFICATION
Note: When ordering parts for Model Numbers suffixed by “XX” or any other letter or letters not specifi-
cally identified on this instruction sheet, order Renewal Parts on special order basis, giving name of
part, part number, model number and description.
Replacement
Element
Model Volts Phase kW Assembly
NWH-185015 240 3 50 155-013185-046
NWH-185015 480 3 50 155-013185-047
NWH-187515 240 3 75 155-013185-049
NWH-187515 480 3 75 155-013185-050
NWH-1810015 240 3 100 155-013185-052
NWH-1810015 480 3 100 155-013185-053
NWH-1812515 240 3 125 155-013185-058
NWH-1812515 480 3 125 155-013185-059
NWH-1815015 240 3 150 155-013185-061
NWH-1815015 480 3 150 155-013185-062
NWH-1817515 240 3 175 155-013185-064
NWH-1817515 480 3 175 155-013185-065
NWH-1820015 240 3 200 155-013185-067
NWH-1820015 480 3 200 155-013185-068
Parts Common To All Heaters
Flexitallic Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . .132-019779-007
Standard Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . .132-017222-007
MAINTENANCE
1. WARNING: Hazard of Shock. Disconnect
all power before servicing heater.
2. Remove heating element assembly periodically to check
heater sheath for scaling, corrosion or excessive oxidation.
Correct operating conditions to minimize sheath deterioration.
3. Periodically check temperature control and limit control oper-
ation to insure accurate and safe process operation.
4. Check all electrical connections periodically and retighten
connections which may have loosened in service. Replace
wire and wire terminals which show signs of oxidation which
would interfere with establishment of reliable electrical con-
nections.