Instructions / Assembly

-7-
Installation - Digital Control Set-Up
Temperature settings above 120° F can create a
scald hazard.
Installer
Settings
User
Modes
LED
Display
Mode
Indicators
Setting Code Description Range
Temperature
Domestic hot water setpoint. Default is 120°F
90-150
Differential Domestic hot water temperature drop before call for heat. Default is 10°F. 5,10
Post-Purge Early boiler shutoff prior to hot water setpoint. Circulator runs until setpoint. Default is 0°F.
0,4,8*
Priority Temporarily cancels space heat to maxmize available energy for hot water. Default is 'n'. y/n
Capacity Water heater capacity; select appropriate size for proper operation. Default is 41 Gallons. 26,41,60,80,120
BTU Transfer Real-time BTU transfer estimate in 1000 BTU/Hr increments. Diagnostic readout only. 0-199MBH/Hr
*Available only when
Differential setting is 10.
Error Code Description Potential Causes
Temp Sensor Temperature sensor (thermistor) fault.
Sensor unplugged
Sensor damaged
Overheating Domestic hot water temperature has exceeded maximum setpoint.
Error in boiler plumbing
Zone valve stuck open
Leak in sensor well
Slow Heating Unit has taken over 60 minutes to reach hot water setpoint or cannot reach setpoint.
Faulty equipment
Fouled heat exchanger
No fuel
Indicator Code Description
Startup Test
Idle
Heating
Displayed briefly during intial powerup to test LED display segments.
Settings To adjust, press and hold the SET button until the Temperature setting appears.
Cycle through settings by depressing the SET button and using the ▼ and ▲ buttons to change the settings.
Diagnostic Error Codes Codes clear automatically when corrected or can be reset by interrupting power to the control for 5 seconds.
To silence an alarm, depress the ▼ on the keypad.
Operating Indicators Water sensor temperature may be shown for 30 seconds by pressing
the ▲ button.
Static numeric [setpoint] readout (factory default shown) indicates domestic hot water setpoint.
Alternating On and [Setpoint] is displayed during a heating cycle while the circulator pump contacts are closed.
After wiring per the appropriate diagram in this manual, insert the white
temperature sensor (thermistor) plug into the receptacle at the base of
the digital control. Zone valves can be slow actuating. Therefore, the
zone valve sensor contains a built-in temperature offset to account for the
time it takes the zone valve to fully close. This results in potable water
temperature that is representative of the digital control temperature set
point. This is why it is important to install the correct sensor into the digital
control. See Page 3 for information regarding the selection of a circulator
or zone valve.
Front Panel
Control
Screws (4)
Wiring Cover
Ground Screw
Temperature
Sensor Plug
Conduit Holes (3)