Lochinvar & A.O. Smith 100167828 Control

For operations in elevated environments, the Lochinvar & A.O. Smith 100167828 Control is the specific high altitude integrated control required to maintain precise combustion and system safety. Standard control modules are often calibrated for sea-level air density, but this OEM replacement part is engineered to manage heating systems at altitudes between 3,000 and 12,000 feet. It actively regulates the blower speed, gas valve, and internal pumps to compensate for reduced oxygen levels, preventing the 2% de-rate per 1,000 feet from compromising your boiler's thermal efficiency. This integrated ignition control manages the direct spark ignition sequence while providing continuous monitoring of flue gas temperatures and flame presence. For technicians servicing Knight, Shield, or Armor models, this board ensures the HVAC burner control logic remains consistent with factory specifications regardless of atmospheric pressure changes.

Key Benefits

• Altitude-Specific Calibration: Pre-programmed logic for 3,000 to 12,000 feet eliminates the need for manual field adjustments to air-to-fuel ratios.
• System Integration: Seamlessly manages the direct spark ignition, blower modulation, and pump relays for consistent temperature control.
• Diagnostic accuracy: Features a built-in interface for real-time reporting of flue gas exit temperatures and blocked inlet detection via air pressure switches.
• Freeze Protection: Incorporates automated sequences that trigger the pump at 45°F and the burner at 37°F to protect the heat exchanger.

Common Questions

How do I know if I need the high altitude version of this control?
If the installation site is above 3,000 feet, standard controls will not properly modulate the blower for the thinner air, leading to poor combustion. Look for the "High Altitude Only" label on the existing unit or verify the 100167828 part number in the Lochinvar service manual.

Is this control compatible with both Lochinvar and A.O. Smith units?
Yes, as an OEM integrated control, it is used across several high-efficiency commercial and residential platforms from both brands, including specific Knight wall-mount and Armor series boilers.

Does this board require a separate flame sensor?
This module uses a dedicated flame probe to detect the presence of the burner flame. While the control manages the signal, ensure the flame sensor and igniter are cleaned during the board swap to prevent nuisance lockouts.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.