Fulton Alliance (FT-HC) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 60)

© The Fulton Companies 2012
OPERATION
FTHC-IOM-2012-1001
SECTION 3
3-24
!
WARNING
To ensure that your Fulton equipment
is kept operating safely and
effi
ciently, follow the maintenance
procedures set forth in this manual.
The end user of the heater must
maintain all labels on the heater
in clean, legible condition. All
connections and safety devices, both
mechanical and electrical, must be
kept clean, with ease of access for
inspection, use and maintenance.
 High Temperature Limit Switches Safety
All units are fi tted with high temperature limit controllers which monitor the fl uid
temperature at the heater outlet. This limit controller provides over temperature
protection. A high temperature limit switch acts as an over temperature safety
device.
1. If the high temperature limit shuts down the unit, the manual reset button
on the limit switch must be pressed after determining and resolving issue.
The red button on the fl ame programmer (or door reset) must also be
pressed to reset the unit before it can be restarted.
2. The high temperature limit controller is factory set to 0 F. This must be set
to the lowest of the following:
» Maximum operating temperature of the fl uid.
» Maximum operating temperature of the equipment.
» 15°F (9°C) over maximum system operating temperature.
3. Do not set this controller too close to the normal outlet temperature in
order to avoid nuisance lockouts due to small transient over temperatures.
4. Several consecutive lockouts caused by the high temperature limit
controller indicate the need for immediate installation review.
 Operating Limit Controller
The limit controller is mounted in the panel box door. This limit controller senses
temperature in the outlet manifold. The temperature setpoint in the controller
may be adjusted per manufacturer’s instructions.
 On/Off Controls
Typically one controller is provided to sense the temperature on the heater
outlet. This controls the operation of the heater by switching it on and off .
1. An adjustable two point diff erential between shut off and start up is
built into the controller. This prevents frequent cycling of the burner. The
controller is set to provide the desired outlet fl uid temperature. Due to the
temperature rise through the unit, this may be considerably higher than
the inlet temperature.
2. If the unit is equipped with an on/off controller, it will be located on the
face of the electrical cabinet. The temperature setpoint in the controller
can be adjusted following the manufacturer’s instructions.