Watlow Electric Circulation Heaters 397 Leaflet
397
W A T L O W
Circulation Heaters
Tubular and
Process Assemblies
Process Assemblies
Cir
culation Heater
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.
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.
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:
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)
CPBPL2S12➀
12
(6)
1.50
20
7
⁄
8
(530)
CPBPB6S12
CPBPB2S12➀
12
(6)
1.69
20
7
⁄
8
(530)
CPBPM2S12➀
12
(6)
1.88
20
7
⁄
8
(530)
CPBPN2S12➀
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)
CPBPD2S12➀
15
(7)
2.50
20
7
⁄
8
(530)
CPBPE6S12
12
(6)
3.00
26
11
⁄
16
(678)
CPBPF2S12➀
CPBPF7S12
15
(7)
3.75
26
11
⁄
16
(678)
CPBPG2S12➀
15
(7)
4.00
26
11
⁄
16
(678)
CPBPH7S12
15
(7)
5.00
26
11
⁄
16
(678)
CPBPJ7S12➀
15
(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
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
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
(25 mm) hose
F.O.B.: Hannibal, Missouri