| TROUBLE SHOOTING GUIDE | ||
PROBLEM | CAUSE | SOLUTION | |
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No hot water | Boiler does not operate | Refer to boiler installation instructions | |
at faucet |
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| Check main service switch | ||
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| Check fused disconnect | |
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| Circulator does not operate | Check power supply | |
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| Replace as necessary | |
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| Improper aquastat setting calibration | Turn tank aquastat to appropriate or setting | |
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| Zone valve does not open (if used) | Check power supply | |
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| Replace as necessary | |
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| Electrical problem (relay, wiring, etc.) | Check fuse and replace | |
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| Check circuit breaker andreset (if applicable) | |
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| Check power supply | |
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| Scale | If boiler, circulator, and tank are operating | |
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| satisfactorily, coil may have scale coating. | |
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| See Maintenance | |
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| Clogged cold water filter or | Clean or replace filter or strainer | |
| boiler supply strainer (if used) |
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Water at | Aquastat set too high | Lower aquastat setting. See Operating Instructions | |
faucet too |
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Improper system plumbing | Compare to plumbing in Water Connections | ||
hot | |||
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| Improper system wiring | Compare to wiring in Electrical Connections | |
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Insufficient | Aquastat setting too low | Adjust aquastat to higher setting. | |
hot water |
| See Operating Instruction | |
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| Undersized boiler with no | Rewire for priority | |
| priority to domestic hot water |
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| Peak use of hot water is greater | Determine peak usage and compare to tank capacity | |
| than tank storage capacity |
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| Faulty tank aquastat | Replace aquastat | |
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Boiler cycles | Excessive demand | Reduce demand or consider larger tank | |
more per day |
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in summer | Faulty aquastat | Replace aquastat | |
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| Boiler high limit set too low | Increase boiler high limit setting | |
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