Chromalox PD441-1 Installation, Operating And Maintenance Instructions

MAINTENANCE INSTRUCTIONS

Type E2
Moisture-Tight
Explosion-Resistant
Enclosure
Model kW
MTO-241LT 4
MTO-241LT 4
MTO-251LT 5
MTO-251LT 5
MTO-275LT 7.5
MTO-275LT 7.5
MTO-212LT 11.5
MTO-213LT 13
WARNING: Calculate and allow for thermal expansion.
Pipe insert will expand upon heating. The rear end of the
pipe insert must remain free from the tank wall. Heating
elements will also expand upon heating and must not
extend to the end of the pipe insert.
Chromalox type MTO-LT screwplug immersion heater is designed
for insertion into a 2" or larger pipe.
WARNING: It is the responsibility of the purchaser of the heater to make
WARNING: Hazard of Shock. Disconnect all power
before installing heater.
1. Before installing, check your type MTO-LT pipe insert heater
for any damage that may have occurred during shipment.
2. Check to insure that the line voltage is the same as that stamped
on the nameplate.
3. Do not bend the heating elements. If bending is necessary,
consult factory.
4. IMPORTANT: Mount heater in the tank so that the liquid level
will always be above the effective heated portion of the heater (see
Figure 1). If the heater is not properly submerged, it may overheat
and damage the heating elements and create a possible fire hazard
due to excessive sheath temperatures.
5. Where work will pass over or near equipment, additional protec-
tion such as a metal guard may be needed.
© 2010 Chromalox, Inc.
Chromalox
Installation, Operation
and
Pipe Insert Immersion Heater
3/4" Pipe Outlet
Dim. (In.)
Volts Phase A
240 1 127
480 1 127
240 1 163
480 1 163
240 1 211
480 1 211
480 1 319
480 1 367
®
Type MTO-LT
A
B
2-3/8"
Spacer
Max.
Pipe, Support &
Tank (by others)

GENERAL

the ultimate choice of pipe material based upon his knowledge of the
Pipe
chemical composition of the corrosive solution, character of the material
B Thd.
entering the solution and controls which he maintains on the process.
120 2
Chromalox cannot warrant any electric immersion heater against failure,
120 2
if such failure is the result of corrosion due to improper material selec-
156 2
tion by the user.
156 2
204 2 1. Heater Construction Characteristics:
204 2
A. High quality resistance wire held in place by compacted
312 2
360 2
B. Low to High Watt densities.
C. Explosion Resistant/Liquid-Tight E-2 terminal enclosures
WARNING: Users should install adequate controls and
safety devices with their electric heating equipment.
Where the consequences of failure may be severe, back-
up controls are essential. Although the safety of the
installation is the responsibility of the user, Chromalox
will assist in identifying equipment options.

INSTALLATION

Expected Low
Level of Liquid
Expected Maximum
Sediment Level
Note: Locate Heater as low as possible for maximum liquid storage capacity. Heat
does not move downward.
SERVICE REFERENCE
4
DIVISION
SALES
(Supersedes PD441)
REFERENCE
MARCH, 1999
DATE
Expansion Gap
2-1/16"
I.D. Min.
Expansion Gap
Magnesium Oxide Refractory enclosed in an Incoloy® sheath.
are standard.
This Portion of Heater Above Liquid Level and
Exposed to Air Will Lead to Premature Burnout of Element
RIGHT
Figure 1 - Open Tank Installation
MTO-LT
SECTION
PD441-1
161-303567-001
WRONG