Hot Water Generator Installation and Operation Manual
5Troubleshooting (continued)
| SYMPTOM |
| PROBABLE CAUSE |
| CORRECTIVE ACTION | |||||||
Outlet | temperature • Inlet | energy source | pressure | is too | • For steam | systems | check the | primary | ||||
fluctuates widely. | low or boiler water temperature is too low. | energy source pressure/temperature. If the | ||||||||||
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| reading is low, adjust the inlet | ||||
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| pressure/temperature to meet the design | ||||
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| requirements. If there is a restriction in the | ||||
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| primary energy source line, the pressure | ||||
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| reading will drop excessively when the | ||||
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| generator calls for full energy on steam | ||||
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| systems, even though the pressure seems | ||||
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| to be normal during light demand. If the | ||||
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| primary pressure is correct, the system | ||||
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| should reach design pressure for energy | ||||
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| source in the tube bundle as the |
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| temperature of the water in the tank | ||||
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| heater approaches shutoff. |
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| • The condensate / water return piping | • Reconfigure | the condensate | / | water | ||||||
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| has | not been installed properly, | return piping and check valve | to | allow | ||||||
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| allowing the condensate / water to | for proper drainage. | Check to assure | ||||||||
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| drain | freely | (by | gravity); | the | that there is no restriction in the | |||||
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| condensate / water drain line is | condensate / water drain line. | Replace | ||||||||
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| restricted; or the condensate / water | the check valve if it is leaking or has | |||||||||
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| check valve is leaking or has failed. |
| failed. Also, check | to assure that | there | ||||||
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| is no restriction in the condensate / | ||||
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| water drain line. |
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| • The primary / inlet temperature control | • Verify control valve bulb was installed in | |||||||||
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| valve is not closing properly. |
| the bulbwell. |
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| • Bypass | valve | not | adjusted | (boiler | • Adjust bypass valve approximately half | |||||
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| water). |
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| closed. Readjust as necessary. |
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| • The primary / inlet temperature control | • Verify control valve actuator is working | |||||||||
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| valve is not opening properly. |
| properly , if not replace. |
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Excess or | insufficient | • The |
| condensate | / water return piping | • Reconfigure | the | condensate | / | water | |||||||||
condensate (boiler water) | has |
| not | been | installed | properly, | return piping and check valve | to | allow | ||||||||||
being | returned from the | allowing | the condensate / water to | for proper | drainage. | Check to | assure | ||||||||||||
drain | freely | (by | gravity); | the | that | there |
| is | no | restriction |
| in | the | ||||||
unit. |
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| condensate / water drain line is | condensate / water drain line. | Replace | |||||||||||||||
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| restricted; or the condensate / water | the check valve if it is leaking or has | |||||||||||||||
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| check valve is leaking or has failed. |
| failed. | Also, | check | to assure that | there | ||||||||||
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| is no restriction in the condensate / | ||||||||
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| water drain line. |
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| • Bypass loop valve not adjusted (boiler | • Adjust bypass valve approximately half | |||||||||||||||
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| water). |
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| closed. Readjust as necesssary. |
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Steam | being | discharged • The | tube | bundle | is | heavily | scaled | or | • Call | Lochinvar | Corporation, |
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into | the | condensate | damaged. |
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| authorized | sales | agent for instructions | ||||||||
drain. |
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| on repair or replacement. |
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13 
