Demir Dokum HK 50 M Service Bulletin
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HK 50 M – HK 10M – HK 100S SERVICE BULLETIN4. DECOMMISSIONING THE BOILERTEMPORARY DECOMMISSIONINGThe following procedure is applied on occasions where a temporary shut-down is required on the weekend,during a short trip.- Set room thermostat to 10 oC- Set parameter "2" (domestic hot water) to "10" or alternatively, Boiler thermostat to 10 oCWhile turning off the device, the green LED begins flashing. Do not cover the gas inlet for boilerprotection.Frost protection is active in stand-by mode. Frost protection is active at 2 levels.(Section3.11.6)Protection by pump only- Master card activates the frost protection function when the unit is in stand-by mode.For this reason, it is necessary that the device is not turned off before an activated device is completelydischarged. Frost protection occurs at 2 stages. In the first stage only the pump is operated. In the secondstage, the pump and the burner start to work.- If the manifold temperature is < 5 oC, the high temperature circuit pump and the circulation pump willstart to work or if the system is operating in conjunction with the outdoor air sensor, the high temperaturecircuit pump and circulation pumps will start to operate when outdoor air temperature is < 3 oC (parameter35).Pump and burner protection together- If the manifold (mixing tank) temperature is <5 oC for 10 minutes, one boiler burner is switched on andthe burner runs with the pumps until the manifold temperature is > 20 oC.- In systems connected with outdoor air sensors (parameter 14 or 22 = 1); even if the manifoldtemperature is > 5 oC after 10 minutes, the pumps continue to operate until the system reaches the outsidetemperature set at parameter 35. (OEM value is 3 oC. This value can be set between -30 oC and 15 o.)4.2 LONG-TERM DECOMMISSIONINGIf the heating units will not operate for a long time, the following operations must be performed.- Turn off the main system main switch (default 4.1) (2) green indicator light will turn off.- Close the gas and water valves |
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