Watlow Heater Catalog

Immersion Heaters

WATROD and FIREBAR Screw Plug Immersion Heaters

®

®

Application: Clean Water • 2 1 / 2 inch NPT screw plug • FIREBAR elements • Without thermostat • General purpose enclosure

General Purpose

¾ in. NPT Knockout

(3) 1 in. (25 mm) FIREBAR Elements

Thermowell

2 ½ in. (64 mm) Bundle

4 ⁄ in. Dia. (117.5 mm)

21

• Moisture/Explosion-Resistant enclosure (suitable for use in non-classified areas only) 2.50" FIREBAR

3 ⁄ in. (85.7 mm) Cold (Ref.)

4 ⁄ in. Dia. (119.1 mm)

"B"

Moisture/Explosion- Resistant

1 ¼ in. NPT Hubs

(3) 1 in. (25 mm) FIREBAR Elements

Thermowell

2 ½ in. (64 mm) Bundle

6 ¼ in. Dia. (159 mm)

22

3 ⁄ in. (85.7 mm) Cold (Ref.)

7 ¼ in. Dia. (185 mm)

"B"

WATCONNECT Part Number

WATCONNECT Part Number

“B” Dim. in. (mm)

Part Number

Ship Wt. lbs (kg)

Part Number 5

Ship Wt. lbs (kg)

Description Volts kW Ph

Type J T/C

Type K T/C

Type J T/C

Type K T/C

General Purpose Enclosure

Moisture/Explosion- Resistant Enclosure

240 15.0 3 15 1 / 8 (384.2) BLNF15C3S 480 15.0 3 15 1 / 8 (384.2) BLNF15C5S 240 20.0 3 18 1 / 8 (460.4) BLNF18C3S 480 20.0 3 18 1 / 8 (460.4) BLNF18C5S 3 480 25.0 3 23 1 / 8 (587.4) BLNF23C5S 480 32.0 3 28 5 / 8 (727.1) BLNF28L5S 480 38.0 3 33 5 / 8 (854.1) BLNF33L5S

90 W/in 2 8 304 SS Plug 3-Alloy 800 Elements (14 W/cm 2 )

C2-50 C2-92 BLNF15C3C C2-43 C2-35 BLNF15C5C C2-50 C2-92 BLNF18C3C C2-225 C2-226 BLNF23C5C C2-225 C2-226 BLNF28L5C C2-225 C2-226 BLNF33L5C C2-43 C2-35 BLNF18C5C 3 15 17 20 14 14 15

(7) C3-114 C3-115 (7) C3-116 C3-118 (7) C3-114 C3-115 (7) C3-116 C3-118 (8) C3-117 C3-119 (9) C3-117 C3-119

11 (5) 11 (5) 12 (6) 12 (6) 14 (7) 17 (8) 18 (9)

21 (10) C3-117 C3-119

Note: All screw plug bundles are designed to fit the inside diameter of the equivalent mating coupling. They will not fit into the equivalent pipe inside diameter. 3 Wired for 3-phase operation only 5 No third party recognition 8 Can be wired for 1-phase operation

164