Applicable Systems
Lochinvar Knight Boiler (SMART SYSTEM Control)
Symptoms
The boiler reports a DHW temperature differential alarm. The DHW temperature difference is too large.
Possible Causes
- DHW flow rate too high for the boiler capacity
- DHW heat exchanger scaled
- Boiler firing rate too low for the demand
Troubleshooting Steps
- Step 1: Verify the DHW flow rate
Flow is within the boiler capacity - Step 2: Inspect the DHW heat exchanger for scale
Exchanger is clean - Step 3: Verify the boiler firing rate for the demand
Rate matches the DHW load
How to Reset
To reset: Correct the DHW temperature issue, then clear the alarm.
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Source: Lochinvar Boiler Manual, Lochinvar Corporation
Category: Boiler
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