EP18-72-IOMM-2015-7
Fulton Ltd
Page 10
INSTALLATION - 2
Adjust the steam pressure controls to suit the boiler application.
It should be noted that boilers are designed to operate most efficiently at their maximum operating
pressure.
Where steam is required below a pressure of 60 psi (4 bar), consideration should be given to the
fitting of a pressure reducing set.
Setting the pressure controllers
High Limit Controller
1. Set the controller range scale to 5 psi below the safety valve setting.
2. Set the differential scale to zero.
On/Off Controller
1. Set the Range Scale
A
to the maximum pressure required.
2. Set the Differential Scale
B
to give the required pressure differential between the boiler
heating elements being de-energised (switched off) and energised (switched on).
Valve
C
is fitted in the pressure supply line to allow the testing of the boiler pressures and the
controllers.
2.7
STEAM PRESSURE CONTROL
High limit controller
On/Off controller
A
B
C
Figure. 6 -
Pressure Controllers
