Chromalox PD422-4 User manual

DIVISION 4 SECTION PTH
SALES
REFERENCE
DATE
SERVICE REFERENCE
Installation
and
Operating Instructions
PD422-4
161-056676-001
NOVEMBER, 2004
(Supersedes PD422-3)
Chromalox
®
GENERAL
© 2010 Chromalox, Inc.
Type PTH
Over-the-Side Immersion Heaters
FIRE/EXPLOSION HAZARD. This heater is not intend-
ed for use in hazardous atmospheres where flamma-
ble vapors, gases, liquids or other combustible atmos-
pheres are present as defined in the National
Electrical Code. Failure to comply can result in per-
sonal injury or property damage.
Chromalox type PTH over-the-side immersion heaters are
especially suited for use in plating tanks, rinse tanks and other
aqueous solutions.
IMPORTANT: It is the responsibility of the purchaser
of the heater to make the ultimate choice of sheath
material based upon his knowledge of the chemical
composition of the corrosive solution, character of the
materials entering the solution, and controls which he
maintains on the process.
Sheath corrosion can result in a ground fault which,
depending upon the solution being heated, can cause
an explosion or fire.
Heater Construction Characteristics.
A. High quality resistance wire held in place by compacted mag-
nesium oxide in type 316 passivated stainless steel sheath.
B. Medium watt densities.
C. Vapor resistant junction box with 3’ PVC flexible conduit with
ground wire.
D. Spacer bar prevents elements from touching tank wall.
E. Flat profile consumes little tank work area.
The system designer is responsible for the safety of
this equipment and should install adequate back-up
controls and safety devices with their electric heating
equipment. Where the consequences of failure could
result in personal injury or property damage, back-up
controls are essential.
Model Volts Dimensions (In.) Approx.
Number (1 Ph) kW W/In2Wt.
AB
(Lbs.)
PTH-101 120 1 21 14 8 4
PTH-102 240 1 21 14 8 4
PTH-202 240 2 31 21 11 4
PTH-204 480 2 31 21 11 4
PTH-302 240 3 32 26 16 5
PTH-304 480 3 32 26 16 5
PTH-402 240 4 34 20 20 5
PTH-404 480 4 34 30 20 5
PTH-602 240 6 34 40 30 6
PTH-604 480 6 34 40 30 6
PTH-902 240 9 34 54 44 8
PTH-904 480 9 34 54 44 8
Specifications
1-3/4”
Leadwires w/ Ground
3’ PVC Flexible Conduit
4, 6 and 9 kW
Heaters Equipped
with Two (2)
1-1/8” Spacers
1, 2 and 3 kW
Heaters Equipped
with One (1)
1-1/8” Spacer
Mounting Plate
5 x 1-1/2” Wide with
(2) Holes
4” Center to Center
B
Heated
A
Figure 1 Figure 2

INSTALLATION
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do so
could result in personal injury or property damage.
Heater must be installed by a qualified person in
accordance with the National Electrical Code, NFPA
70.
1. Before installing the PTH heater, inspect it thoroughly for
possible damage which may have occured during shipment. Also
check to insure that the line voltage is the same as that stamped on
the heater nameplate.
2. Where work will pass over or near equipment, additional pro-
tection such as a metal guard may be needed.
3. To resist buoyancy and to keep the heater in close profile with
tank wall, a metal bracket with two mounting holes has been pro-
vided.
4. IMPORTANT: Heated section (See Figure 1, “B” Dimension)
must be totally immersed at all times. If the heater is not properly
submerged, it will overheat and damage the heating elements and
create a possible fire hazard due to excessive sheath temperatures.
5. Heater must not be operated in sludge.
FIRE HAZARD. Since heaters are capable of develop-
ing high temperatures, extreme care should be taken
to:
A. Avoid installing heaters in an atmosphere containing com-
bustible gases and vapors.
B. Avoid contact between heater and combustible materials.
C. Keep combustible materials far enough away to be free of
the effects of high temperatures.
WIRING
ELECTRIC SHOCK HAZARD. Any installation involving
electric heaters must be performed by a qualified per-
son and must be effectively grounded in accordance
with the National Electrical Code to eliminate shock
hazard.
1. Electrical wiring to heater must be installed in accordance
with the National Electrical Code or local codes by a qualified per-
son.
2. When element wattages are not equal, heaters must not be
connected in series.
3. For single phase, apply power across two (2) black leads.
Green wire (ground) must be properly grounded.
4. For balanced 3 phase loads, three (3) heaters of the same volt-
age and wattage ratings are required. A six-step guide to wiring
connections for 3 phase delta:
A
A
A
A
#1#1 B
B
B
B
BBA A
#2
#2 #3 #3
A
AA
A
#1 #1 #1 B
B
#2 #2
#2 #3 #3 #3
Step 1: Designate one
black leadwire as “A” and
one black leadwire as “B”.
Step 2: Assign designations
1, 2, 3 to heaters.
Step 3: Connect leadwire “A”
of Heater #1 to leadwire “A”
of Heater #2.
Step 4: Connect leadwire “B”
of Heater #1 to leadwire “B”
of Heater #3.
Step 5: Connect leadwire “B”
of Heater #2 to leadwire “A”
of Heater #3.
Step 6: Connect one 3 phase
power line to each of the
three connections.
Three Phase
Power
Note: Green wire (ground) of each heater must be properly grounded.

OPERATION
1. Do not operate heater at voltages in excess of that stamped on
the heater since excess voltage will shorten heater life.
2. Always maintain a minimum of 2” of solution
above the heated portion of the element (See Figure 1, “B”
Dimension) to prevent exposure of the effective heated length. If
the heater is not properly submerged, it may overheat and shorten
heater life.
If the heater is not properly submerged, the heating
elements will overheat and could result in a fire or
damaged equipment.
3. In an electroplating operation the heaters are not under any cir-
cumstances to be placed between the electrodes and the work.
MAINTENANCE
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do so
could result in personal injury or property damage.
Heater must be installed by a qualified person in
accordance with the National Electrical Code, NFPA
70.
1. Heaters should be checked periodically for coatings and corro-
sion, and cleaned if necessary.
2. Tank should be checked regularly for sediment around the end
of heater as this sediment can act as an insulator and shorten heater
life.

2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: [phone] www.chromalox.com
TA - Q0 - EF
Litho in U.S.A.
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
http://www.chromalox.com/customer-service/policies/termsofsale.aspx.