Fulton Alliance (FT-HC) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 71)

Questions? Call (315) 298-5121, or visit us online at www.fulton.com
SECTION 4
FTHC-IOM-2012-1001
MAINTENANCE
4-7
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
4
CAUTION
All maintenance procedures should
be completed by trained personnel.
Appropriate training and instructions
are available from the Fulton Service
Department at (315) 298-5121 or your
local Fulton Thermal Representative.
Safety Check Procedures
Perform the following safety checks as needed:
 Liquid Level Switch
Manually turn liquid level switch cam counterclockwise. See Figure 13. Micro-
switch will open contacts and control voltage will be lost. Release cam and
micro-switch will make and control voltage will be restored.
 Stack Limit
The limit manufacturer presets the stack limit. Testing can be performed by
removing switch from stack and applying heat over that of the switch set point
for several seconds. The switch can then be reset and re-installed. See Figure 24.
 Diff erential Pressure Switch
With the circulating pump running, observe the diff erence in pressure between
the heater outlet gauge and the heater inlet gauge. Remove the top cover of
the diff erential pressure switch. Note the original setting of the switch and turn
adjustment knob clockwise until switch trips. The pointer on the switch should
be within 2 psi of the observed pressure diff erence. Reset switch to the original
set point. See Figure 25.
FIGURE 24 - STACK LIMIT SWITCH
FIGURE 25 - DIFFERENTIAL PRESSURE SWITCH