6
TH-750-IMI-REV-
5
to open several users and let the system operate for 30-60 minutes before shutting down all
hot water users.
20. Recheck the head bolt torque levels and repair any system leaks as required.
21. For TH-750
units with
electric control
, no instrument
air supply
is
required. Otherwise the
startup procedure is the same as for pneumatic control
22. The electric actuated valve is a
“
spring to close
”
electronic ball type valve with a soft Teflon
seat that closes tight on shutdown.
EC800 Panel with Electric Control
23. The self acting (SA)
version of the TH-750 will
utilize
the Thermaflo Engineering type 25
series valve.
A manual corresponding with the valve type supplied is included in the documentation
package that accompanies the TH-750 heater.
24. The controller illustration below is a quick reference for startup use. A dedicated controller
manual containing more detailed information is also included in the documentation package.
25. Note that all controllers, prior to shipment, are factory set for the operating parameters
provided by the end user at time of order. Each controller is configured so that only the outlet
temperature set point can be changed. All other critical control settings are locked out
(password protected) to prevent inadvertent change or tampering by unauthorized personnel.
The default pass code is 0125.
