RECO HX2 Series, Nstallation, Operation And Maintenance Manual

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A - 1
T
HE
HX2 S
ERIES
S
EMI
-I
NSTANTANEOUS
W
ATER
H
EATERS
A
PPENDIX
1 – T
HE
C
ONTROL
M
ASTER
C
ONTROL
P
ANEL
A.1 General Operation
The function of the controller is to maintain the water outlet temperature of the water
heater and monitor its status. This is done with a PID control loop that sends a signal
to the steam control valve. Valve signaling is 0-10 VDC as standard.
Symbols shown in the border on the LCD display’s left and right borders indicate the
button functions. In the upper right corner, the “1/11” notation indicates the cursor
is at line 1 of the 11 items on this screen menu.
There are four menu levels: MAIN , OPER , SETUP , and CONFIG . The main menu
lists the primary values and access to other menus.
• The Main menu [ MAIN ] displays the primary controller information and provides
access to the other menus.
• The Operator menu [ OPER ] is used to select local or remote set points, adjust
the local set point, or to manually test the control valves.
• The Setup menu [ SETUP ] is password protected and used for adjusting alarm
points or tuning the controller’s PID loop.
• The Configuration menu [ CONFIG ] is also password protected and is used to set
up input or output signal types, ranges for variables and control valve operation.
HOME
BACK
UP
DOWN
ENTER
ALARM