GENERAL
UNCRATING AND HANDLING OF HEATER
The Chromalox FXTH Flexible Tank Heater is designed for heat-
ing viscous liquids in large steel, concrete or fibrous glass tanks with
normal manhole entry. Standard equipment with every heater
includes flexible pipe and 14’ riser(s), two lifting cables, 4” high
sludge legs and a 50-250° non-indicating thermostat with well,
overtemperature probe and weatherproof terminal housing.
The Control Center OCC (NEMA XII, oil and dust-tight con-
struction) or WCC (NEMA IV, weather-resistant construction) is
designed for controlling the temperature of the viscous liquids by reg-
ulating the FXTH's on-off cycle. It is mounted remotely with standard
components consisting of a NEMA XII or NEMA IV enclosure with
vertical wall mounted brackets and hasp and staple for padlocking.
Electrical components include: Failsafe overheat device, master cir-
cuit-breaker, contactor(s), relay(s), selector switch, pilot lights, fuses
and a 120-volt control circuit transformer.
IMPORTANT-Before attempting to uncrate or install the FXTH
heater, read and understand all of the following instructions. Proper
handling is absolutely necessary to obtain satisfactory operation. All
electrical connections are to be made by a qualified electrician. To
avoid excessive separation, stratification, sludge formation, etc., in
your FXTH heated storage tank, consult a qualified oil supplier
regarding selection and blending of fuel oils.
Heater Front End
Front Lifting Cable
Overtemperature
Probes
Rear Lifting Cable
Heater
Back End
Flexible
Risers
Terminal Housing
Riser Unions
Sludge Leg Base Plates
1. Mechanical
The heater assembly has undergone a rigorous leak test just prior
to shipment from the factory. Visually inspect all joints and flex
tube surfaces to insure no mechanical damage has incurred during
shipping. Contact carrier if heater shows signs of damage. Do not
attempt to install heater if damage is evident. Do not attempt to
tighten or remove any of the threaded fittings in the flexible tube
assembly. If the sealing performed at the factory has been broken.
the unit must undergo another complete leak test supervised by an
Authorized Chromalox Serviceman before installing in tank.
2. Electrical
A.
Open control unit cover and examine electrical components
for any damage which may have been incurred during ship-
ment. Contact carrier and report any damage noted.
B. CAUTION:
Retighten all electrical connections and mounted
components which may have loosened during shipment.
PRE·INSTALLATION CHECK OF HEATER
NOTE:
Inspect shipping crates before opening. Contact the carrier if
damage is evident.
1.
Check to see that all components are included. FXTH immersion
heaters are shipped as subassemblies consisting of (a) flexible
heater with riser tubes, (b) terminal housing, (c) thermowells and
vent tube, and (d) control unit (if ordered).
2.
To unpack flexible heater, keep crate in upright and horizontal
position when removing heater. Only top boards of crate need to
be removed.
3.
When lifting heater assembly, do not bend heater to radius less
than 22". Heaters should be flexed in vertical plane only. This is
a plane perpendicular to the sludge leg base plates. Bending in
horizontal plane can damage internal ceramic insulators.
4.
Use several people to lift heater - the number depends on the
length and weight of the heater. As a guide, four men should be
used to lift and handle a dual tube 20 ft. unit.
5.
Do not put any stress on the flexible riser tubes. These are not
designed for supporting weight. The unit must be lifted by either
the 3" heater tubes or the steel lifting cables furnished with heater
and located at both ends of heater. See Figure A.
6.
Set heater in upright position on flat surface. Avoid any lateral
bending.
CAUTION:
Never drop heater or subject it to mechanical shock.
Figure A
2
Содержание FXTH PN401
Страница 11: ...11...
