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Chromalox
®
(Supersedes PE414-2)
PE414-3
NWH
161-304777-001
MAY, 2007
4
RENEWAL PARTS IDENTIFICATION
Installation, Operation
and
Circulation
Heaters for Oil or Water Heating
© 2010 Chromalox, Inc.
Specifications – Table A
GENERAL
READ ALL INSTRUCTIONS BEFORE USE
FIRE/EXPLOSION HAZARD. Ordinary location
heaters (designated E1) are not intended for use in
hazardous atmospheres where flammable vapors,
gases, liquids or other combustible atmospheres are
present as defined in the National Electrical Code.
Failure to comply can result in personal injury or
property damage.
This design has the versatility of field adjustments of voltage
kW through various wiring combinations.
The NWHSRG model is a general purpose water circulation
heater intended for indoor use. E2 designs have a Moisture
Resistant/Explosion Resistant enclosure. Designs are up to 40kW
- DO NOT USE THE NWHSRG MODEL FOR OIL.
The NWHOSR model is a general-purpose regular and fuel oil
solution circulation heater intended for use indoors. E2 designs
have a Moisture Resistant/Explosion Resistant enclosure. Designs
are up to 10kW - DO NOT USE THE NWHOSR MODEL FOR
WATER. Ensure the wiring guide for oil is used for the correct
wiring diagram.
Both the NWHSRG and NWHOSR use six INCOLOY
®
sheath
elements welded to a steel 2.5” screw plug. The vessel is cast iron
and is surrounded by 1.5” insulation and a sheet metal jacket. For
water applications, the vessel has a galvanized coating. A J-type
thermocouple in a thermowell is standard. These
versaTHERM
TM
heaters
are designed for 150 psig max. at 35°F min. to 300°F max.
IMPORTANT: It is the responsibility of the purchaser of
the heater to make the ultimate choice of sheath
material based upon his knowledge of the chemical
composition of the corrosive solution, character of the
materials entering the solution, and controls which he
maintains on the process.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property dam-
age. Heater must be installed or serviced by a
qualified person in accordance with the National
Electrical Code. NFPA 70.
The system designer is responsible for the safety
of this equipment and should install adequate
back-up controls and safety devices with their
electric heating equipment. Where the conse-
quences of failure could result in personal injury or
property damage, back-up controls are essential.
If foreign material is to be carried by the liquid flow, install
suitable filters in the inlet pipe to the heater.
Ensure the temperature/pressure is controlled below the vapor
point of the liquid at all times and is within the temperature/pres-
sure ratings for this heater.
Heating elements must be completely immersed in liquid when
energized.
Dim. (In.)
A B Model PCN
Cast Iron Body / Oil .5 to 10 kW
29 19 NWHOSR-06-04P5-E1 100108
29 19 NWHOSR-06-04P5-E1 100116
41 30
3
/4 NWHOSR-06-005P-E1 100124
29 19 NWHOSR-06-006P-E1 100132
29 19 NWHOSR-06-006P-E1 100140
41 30
3
/4 NWHOSR-06-010P-E1 100159
Galvanized Body / Water .5 to 40 kW
29 19 NWHSRG-06-018P-E1 100010
29 19 NWHSRG-06-018P-E1 100028
41 30
3
/4 NWHSRG-06-020P-E1 100036
29 19 NWHSRG-06-024P-E1 100044
29 19 NWHSRG-06-024P-E1 100079
41 30
3
/4 NWHSRG-06-040P-E1 100095
A
B
6"
Rotatable
Terminal
Cover
1" Conduit
Opening
Outlet
1" FNPT
Inlet
1" FNPT
1" FNPT Pipe Plug
(or Inlet)
8 / "
1
2
4"
2 Mtg. Lugs
/ "-13 x / " Deep
1
1
2
2
Specifications – Table B
Dim. (In.)
A B Model PCN
Cast Iron Body / Oil .5 to 10 kW
32 19 NWHOSR-06-04P5-E2 100255
32 19 NWHOSR-06-04P5-E2 100263
44 30
3
/4 NWHOSR-06-005P-E2 100271
32 19 NWHOSR-06-006P-E2 100280
32 19 NWHOSR-06-006P-E2 100298
44 30
3
/4 NWHOSR-06-010P-E2 100300
Galvanized Body / Water .5 to 40 kW
32 19 NWHSRG-06-018P-E2 100327
32 19 NWHSRG-06-018P-E2 100343
44 30
3
/4 NWHSRG-06-020P-E2 100351
32 19 NWHSRG-06-024P-E2 100360
32 19 NWHSRG-06-024P-E2 100378
44 30
3
/4 NWHSRG-06-040P-E2 100386
Dimensions (Inches)
A
B
11"
7-7/8"
6"
E1
E2
TM