Sterlco Upright High Temperature Heat Transfer - Manual (Page 13)

Upright Portable Hot Oil TCUs Chapter 2: Functional Description 13
Connection Lines
Connections for TO PROCESS and FROM PROCESS lines are 1" NPT (25.4 mm). Water
connections for COOLING WATER SUPPLY and COOLING WATER DRAIN are ¾” NPT
(19.1 mm); see Section 3-4 on Page 20 for more information. The customer is responsible for
conversions to metric standards.
The manufacturer stocks many lengths of flexible metal hose; the part number is 572-16969.
State the length of hose you want when ordering.
WARNING! Component failure may result in high-temperature oil spray, causing serious injury or
death. Make sure hoses, valves, and other components installed in your process can
withstand maximum temperature and pressure of the Upright unit; check unit
nameplate for specific capacities. All components must be carefully inspected for
condition before installing. Make sure you have factory components if you have any
doubt.
Electrical System Controls
The electrical controls of your Upright unit are specially engineered for reliability, safety, and
simplicity of operation. Switch functions are clearly labeled. Your Upright unit has a system
status board so you can evaluate the status and performance of the unit at a glance. Pilot
lights are provided to indicate key unit functions.
An audible alarm is standard with your unit. The alarm will sound in the event of the
following conditions:
• motor overload
• safety thermostat trip (over temperature)
• low fluid pressure
• low fluid level
• high fluid level (optional)
Push the ALARM SILENCE button to silence the alarm. See Section 4-2 on Page 25 for
more information on control functions.
Electrical Panel and System Components
The pump motor and immersion heater operate on three-phase, 50/60 cycle, nominal voltage
with the control circuit at 115 V single phase. The control circuit voltage is provided by a
single phase machine tool transformer with primary fuse protection and a grounded
secondary. A main power disconnect is included for ease of service. The electrical panel is
UL listed and complies with N.F.P.A. 79 provisions.
All components are IEC rated for long life and reduced maintenance. The heater elements are
branch fused, and protected from contactor welding by a separate primary voltage contactor.
The pump motor is controlled by a full voltage magnetic reversing starter, with fused branch
circuit overcurrent and thermal overload protection. Many additional features are available as
options.
A NEMA 12 enclosure is standard, with NEMA 4 available as an option.