wirsbo DuoMix 201 Installation Instructions Manual Download Page 32 | Manualshive

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DuoMix Installation Handbook

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Summary of Contents for DuoMix 201

Page 1: ...nditions the area experiences over the heating season If the heat demand is analyzed as a percentage of the heating systems capacity the heating system operates at or near maximum capacity for asmallp...

Page 2: ...thermally shocked Proper protection of the boiler under these circumstances requires modulating mixing devices that can temporarily reduce the heating load This is accomplished by reducing the speed o...

Page 3: ...er Protection A boiler sensor must be installed on the return line to the boiler in order to obtain boiler protection against flue gas condensation if required If the boiler return water temperature a...

Page 4: ...slab supply and return fluid temperatures If this temperature difference approaches the T MAX setting the control operates the variable speed injection pump 2 to maintain the T at the T MAX setting T...

Page 5: ...window openings In order to prevent heat that is transmitted through the wall from affecting the sensor reading it may be necessary to install an insulating barrier behind the enclosure The A3060070 s...

Page 6: ...e from the mixing 2 system pump to the Mix2 Pmp 8 terminal on the control Connect the second wire on the mixing 2 system pump to the N 7 terminal The control provides 120 V ac to the Mix2 Pmp contact...

Page 7: ...17 and 18 terminals on the control Slab Return Sensor 2 Ret2 Slab Return Sensor measures the return glycol temperature from the slab If the mixing 2 section is used for snowmelting connect the two wir...

Page 8: ...jection pump of the mixing 1 section is used make sure power to the terminal block is off and install a jumper between the terminals N Var1 Pmp 13 and 14 When power is applied to terminals the variabl...

Page 9: ...mixing 1 section will be skipped RST reset When using the mixing 1 section for building space heating the installer should select this adjustment The 201 control operates the mixing 1 section to provi...

Page 10: ...ly water temperature this setting must be selected The control operates the mixing 2 section to provide a fixed setpoint temperature equal to the SETPNT 2 temperature adjustment SNOW melting If sectio...

Page 11: ...ion pump to maintain the T at the T MAX setting The T MAX setting can be adjusted from 10 to 70 F 5 to 39 C Factory setting is 30 F CWCO Cold Weather Cut Off CWCO is the lowest temperature at which th...

Page 12: ...Pumps Displays when mixing pumps 1 or 2 are on 2 Warning Displays when an error is present Lock Unlock Displays whether keypad is locked or unlocked WWSD WWSD Displays when control is in Warm Weather...

Page 13: ...ng Idling CWCO 1 2 Target Mixing 2 Temperature Item Menu Start Stop F View Mix 1 Demand Mix 2 Demand Minimum Maximum Melting Idling CWCO 1 2 F 1 View Mix 1 Demand Mix 2 Demand Minimum Maximum Melting...

Page 14: ...Minimum Maximum Melting Idling CWCO 1 2 Outdoor temperature If a mixing 1 section is turned off the View Items from that section are skipped Dashes on the TARGET item denote heat is not required in th...

Page 15: ...Shut Down Desired Setpoint Temperature Item F Adjust Item F Adjust Design Outdoor Temperature F Adjust Adjust Mixing 2 Section Off Mixing 2 Section in Reset Mode Mixing 2 Section in Setpoint Mode Adju...

Page 16: ...e Maximum Supply Temperature F Adjust Misc Menu Units F C Item Misc Item Misc F Misc Display Contrast Display Backlight THE CONTROL AUTOMATICALLY GOES BACK TO THE VIEW MENU WHEN THE BUTTONS ARE LEFT A...

Page 17: ......

Page 18: ...Display Menu Cont...

Page 19: ...injection pump 2 Var 2 Pmp is ramped down to 0 over 10 seconds If the mixing 2 section is not used i e MODES 2 set to OFF N A is displayed and the pump is not operated STEP 6 The mixing 2 pump Mix2 P...

Page 20: ...l displays OUTDOOR SHRT When a fault with the outdoor sensor is present the control assumes a fixed outdoor temperature of 32 F During snow melting operation the control assumes an outdoor temperature...

Page 21: ...2 Boiler return short circuit 1 View 1 2 Boiler return sensor open circuit REFER TO THE TROUBLESHOOTING SECTION ABOVE FOR OPERATION DETAILS Return 2 Sensor Fault When the mixing 2 section is set to S...

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Page 26: ...e it con tinually injects high temperature water at a fixed rate Text and diagrams used with permission from tekmar When the high temperature supply fluctuates and or varying water temperatures are re...

Page 27: ...the mixing occur directly after the point of injection downstream of the return to the hot loop See Figures 4 5 Advantages This type of system can use a small circulator to inject a high BTU input in...

Page 28: ...igures 4 5 show the two most common piping layouts for Variable Speed Injection Mixing Pay particular attention to the drop lines or thermal traps shown in the injection legs These are particularly im...

Page 29: ...rundfos 15 42 Speed 2 9 5 7 4 100 Taco 007 10 8 3 100 Grundfos Brute or 15 42 Speed 2 14 12 100 1 Taco 007 Grundfos Brute or 15 42 Speed 3 23 20 100 1 Grundfos 26 64 Taco 0010 35 31 100 1 Grundfos 43...

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