6. Ener-G-NETControl Setup & Adjustment

Mode

Indicators

LED

Display

User

Modes

Installer Settings

Ener-G-NET features two distinct programming areas: User Modes and Installer Settings. User Modes consist of three end-user functional modes, while Installer Settings are primarily accessed upon initial setup to specify critical operating parameters. Ener-G-NET factory defaults allow traditional operation suitable for most homes. To optimize the control setup, reference the tables below.

Temperature settings above 120° F can create a scald hazard.

User Modes are used to select from three distinct operational modes. To select, press the green MODE button and press again to cycle through the three available modes. A green dot illuminates to display the current mode.

User Mode

Code

Description

Standard

 

Traditional operation within preset temperature differential using a low and high limit.

 

 

 

Efficiency

 

On-Demand sensing reduces fuel consumption by limiting boiler operation during idle periods.

 

 

 

Vacation

 

Reduced temperature setting minimizes boiler operation during anticipaated periods of non-use.

 

 

 

Installer Settings are used to adjust functional operating parameters. 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.

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 in Standard Mode only.

**Available only when Differential setting is 10.

Diagnostic Error Codes display a visual indicator and sound an alarm if a fault is detected. 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.

Error

Code

Description

Potential Causes***

Temp Sensor

 

Temperature sensor (thermistor) fault.

Sensor unplugged

 

Sensor damaged

 

 

 

 

 

 

 

 

Overheating

 

 

Error in boiler plumbing

 

Domestic hot water temperature has exceeded maximum setpoint.

Zone valve stuck open

 

 

 

Leak in sensor well

Slow Heating

 

 

Faulty equipment

 

 

Unit has taken over 60 minutes to reach hot water setpoint or cannot reach setpoint.

Fouled heat exchanger

 

 

 

No fuel

 

Water Alarm

 

Standing water detected.

Standing water

***See Troubleshooting section for additional information

Operating Indicators are used to display operational and functional status. Water sensor temperature may be shown for 30 seconds by pressing the ▲ button.

Indicator

Code

Description

Startup Test

 

Displayed briefly during intial powerup to test LED display segments.

 

 

 

Idle

 

Static numeric [setpoint] readout (factory default shown) indicates domestic hot water setpoint.

 

 

 

Heating

 

Alternating On and [Setpoint] is displayed during a heating cycle while the circulator pump contacts are closed.

 

 

 

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Amtrol HM-41L, HM-41Z, HM-80Z, HM-80L warranty Ener-G-NETControl Setup & Adjustment, Overheating

HM-41Z, HM-80L, HM-80Z, HM-41L specifications

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