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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.
Figure 1
Overall
Length
kW
120/240VÅ(ac)
Inch (mm)
1-Phase
Application: Ethylene Glycol/Engine Coolant
1.13
20
7
⁄
(530)
8
1.50
20
7
⁄
(530)
CPBPB6S12
8
1.69
20
7
⁄
(530)
8
1.88
20
7
⁄
(530)
8
2.00
20
7
⁄
(530)
CPBPC6S12
8
2.25
20
7
⁄
(530)
CPBPD6S12
8
2.25
26
11
⁄
(678)
1 6
2.50
20
7
⁄
(530)
CPBPE6S12
8
3.00
26
11
⁄
(678)
1 6
3.75
26
11
⁄
(678)
1 6
4.00
26
11
⁄
(678)
1 6
5.00
26
11
⁄
(678)
1 6
All preheaters are Stock unless
otherwise noted.
Availability
Stock: Same day shipment
Standard: Four weeks
A
T
• Estimate kilowatt requirements
with the following formula. First
determine the engine
displacement, then multiply:
NEMA 1 Terminal Enclosure
(4) Mounting Slots
(7 mm X 19 mm)
1
/
"
3
/
3
/
"
3
6
6
16
8
8
(157 mm)
(79 mm)
(162 mm)
Up
Outlet
5
/
"
4
8
(117 mm)
Overall Length ±
3
/
" (10 mm)
8
Code No.
208VÅ(ac)
240/480VÅ(ac)
1-Phase
1-Phase
CPBPL2S12
CPBPB2S12
CPBPM2S12
CPBPN2S12
CPBPD2S12
CPBPF2S12
CPBPF7S12
CPBPG2S12
CPBPH7S12
CPBPJ7S12
Standard
L
O
1
/
"- 20 Mounting Bolts
4
Outlet Nozzle
Sized for 1" I.D.
Mounting Slots
(25 mm) hose
WATROD Heating Element
Drain
9
/
" X
3
/
"
32
4
"
3
/
" (56 mm)
2
16
1
/
" (57 mm)
2
4
Ref. Diameter
1
/
" (38 mm)
1
2
Est. Ship.
Weight
lbs
(kg)
12
(6)
12
(6)
12
(6)
12
(6)
12
(6)
12
(6)
15
(7)
12
(6)
15
(7)
15
(7)
15
(7)
15
(7)
W
F.O.B.: Hannibal, Missouri
English
Cubic inches X 3 = estimated wattage
Metric
Liters X 183 = estimated wattage
Vibration
Isolator Bushings
(2) Mounting Studs
Check Valve Inlet Nozzle
Sized for 1" I.D.
Thermowell
(25 mm) hose
3
/
"
3
4
(95 mm)
2 " (50 mm)
1 " (25 mm)
1
/
(4)
-20
4
5
/
"
Bolts,
8
5
/
"
4
(16 mm)
8
(117 mm)
Threaded
Length
397
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