Watlow 397 - Manual
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397
W A T L O W
Circulation Heaters
Tubular and
Process Assemblies
Cir
culation Heater
s
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
20
7
⁄
8
(530)
CPBPL2S12
➀
12
(6)
1.50
20
7
⁄
8
(530)
CPBPB6S12
CPBPB2S12
➀
12
(6)
1.69
20
7
⁄
8
(530)
CPBPM2S12
➀
12
(6)
1.88
20
7
⁄
8
(530)
CPBPN2S12
➀
12
(6)
2.00
20
7
⁄
8
(530)
CPBPC6S12
12
(6)
2.25
20
7
⁄
8
(530)
CPBPD6S12
12
(6)
2.25
26
11
⁄
16
(678)
CPBPD2S12
➀
15
(7)
2.50
20
7
⁄
8
(530)
CPBPE6S12
12
(6)
3.00
26
11
⁄
16
(678)
CPBPF2S12
➀
CPBPF7S12
15
(7)
3.75
26
11
⁄
16
(678)
CPBPG2S12
➀
15
(7)
4.00
26
11
⁄
16
(678)
CPBPH7S12
15
(7)
5.00
26
11
⁄
16
(678)
CPBPJ7S12
➀
15
(7)
Overall
Code No.
Est. Ship.
kW
Length
120/240V
Å
(ac)
208V
Å
(ac)
240/480V
Å
(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)
1
1
/
2
" (38 mm)
2
1
/
4
" (57 mm)
Ref. Diameter
(4) Mounting Slots
9
/
32
" X
3
/
4
"
(7 mm X 19 mm)
4
5
/
8
"
(117 mm)
3
3
/
4
"
(95 mm)
1" (25 mm)
2" (50 mm)
(4)
1
/
4
-20
Bolts,
5
/
8
"
(16 mm)
Threaded
Length
2
3
/
16
" (56 mm)
6
3
/
16
"
(157 mm)
3
1
/
8
"
(79 mm)
6
3
/
8
"
(162 mm)
Up Outlet
4
5
/
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
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