Chromalox PD441-1 manual General, Installation

Chromalox®

Installation, Operation

and

MAINTENANCE INSTRUCTIONS

SERVICE REFERENCE

DIVISION 4		SECTION MTO-LT
SALES	(Supersedes PD441)		PD441-1
REFERENCE
			161-303567-001

DATE MARCH, 1999

Type MTO-LT

Pipe Insert Immersion Heater

A

B

2-3/8”

Max.Spacer

Expansion Gap

2-1/16”

I.D. Min.

Type E2

Moisture-Tight

Explosion-Resistant

Enclosure

Pipe, Support &

Tank (by others)

3/4” Pipe Outlet

Expansion Gap

GENERAL

				Dim. (In.)		Pipe
Model	kW	Volts	Phase	A	B	Thd.
MTO-241LT	4	240	1	127	120	2
MTO-241LT	4	480	1	127	120	2
MTO-251LT	5	240	1	163	156	2
MTO-251LT	5	480	1	163	156	2
MTO-275LT	7.5	240	1	211	204	2
MTO-275LT	7.5	480	1	211	204	2
MTO-212LT	11.5	480	1	319	312	2
MTO-213LT	13	480	1	367	360	2

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

the ultimate choice of pipe material based upon his knowledge of the chemical composition of the corrosive solution, character of the material entering the solution and controls which he maintains on the process. Chromalox cannot warrant any electric immersion heater against failure, if such failure is the result of corrosion due to improper material selec- tion by the user.

1.Heater Construction Characteristics:

A.High quality resistance wire held in place by compacted Magnesium Oxide Refractory enclosed in an Incoloy® sheath.

B.Low to High Watt densities.

C.Explosion Resistant/Liquid-Tight E-2 terminal enclosures are standard.

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

WARNING: Hazard of Shock. Disconnect all power before installing heater.

Expected Low

This Portion of Heater Above Liquid Level and

1.	Before installing, check your type MTO-LT pipe insert heater
2.	for any damage that may have occurred during shipment.
	Check to insure that the line voltage is the same as that stamped
3.	on the nameplate.
	Do not bend the heating elements. If bending is necessary,
	consult factory.
4.	IMPORTANT: Mount heater in the tank so that the liquid level

Level of Liquid

Exposed to Air Will Lead to Premature Burnout of Element

WRONG

RIGHT

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.

Expected Maximum

Sediment Level

Note: Locate Heater as low as possible for maximum liquid storage capacity. Heat does not move downward.

Figure 1 - Open Tank Installation

© 2010 Chromalox, Inc.