Watlow Circulation Heaters 397 User manual

397
W A T L O W
Circulation Heaters
Tubular and
Process Assemblies
Circulation Heaters
Engine Preheaters
Application Hints
• Mount engine preheaters in
horizontal position only (as shown
in Figures #1, #2 and #3). Consult
your Watlow representative if
vertical mounting is unavoidable.
• Mount the heater near or below
the lowest point on the engine
block. Keep outlet nozzle pointed
up, as indicated on the tank.
• Estimate kilowatt requirements
with the following formula. First
determine the engine
displacement, then multiply:
English
Cubic inches X 3 = estimated wattage
Metric
Liters X 183 = estimated wattage
Application: Ethylene Glycol/Engine Coolant
1.13 207⁄8(530) CPBPL2S12➀12 (6)
1.50 207⁄8(530) CPBPB6S12 CPBPB2S12➀12 (6)
1.69 207⁄8(530) CPBPM2S12➀12 (6)
1.88 207⁄8(530) CPBPN2S12➀12 (6)
2.00 207⁄8(530) CPBPC6S12 12 (6)
2.25 207⁄8(530) CPBPD6S12 12 (6)
2.25 2611⁄16 (678) CPBPD2S12➀15 (7)
2.50 207⁄8(530) CPBPE6S12 12 (6)
3.00 2611⁄16 (678) CPBPF2S12➀CPBPF7S12 15 (7)
3.75 2611⁄16 (678) CPBPG2S12➀15 (7)
4.00 2611⁄16 (678) CPBPH7S12 15 (7)
5.00 2611⁄16 (678) CPBPJ7S12➀15 (7)
Overall Code No. Est. Ship.
kW Length 120/240VÅ(ac) 208VÅ(ac) 240/480VÅ(ac) Weight
Inch (mm) 1-Phase 1-Phase 1-Phase lbs (kg)
Figure 1
All preheaters are Stock unless
otherwise noted.
Availability
Stock: Same day shipment
Standard: Four weeks
➀ Standard
Overall Length ±3/8" (10 mm)
11/2" (38 mm)
21
/4
" (57 mm)
Ref. Diameter
(4) Mounting Slots 9/32" X 3/4"
(7 mm X 19 mm)
45/8
"
(117 mm)
33/4"
(95 mm)
1" (25 mm)
2" (50 mm)
(4) 1/4-20
Bolts, 5/8"
(16 mm)
Threaded
Length
23/16" (56 mm)
63/16"
(157 mm)
31/8
"
(79 mm)
63/8
"
(162 mm)
Up Outlet
45/8
"
(117 mm)
Outlet Nozzle
Sized for 1" I.D.
(25 mm) hose
Vibration
Isolator Bushings
Mounting Slots
1/4"- 20 Mounting Bolts
(2) Mounting Studs
Drain
NEMA 1 Terminal Enclosure
WATROD Heating Element
Thermowell
Check Valve Inlet Nozzle
Sized for 1" I.D.
(25 mm) hose
F.O.B.: Hannibal, Missouri