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settings allow the control to return to 
normal operation on its own.  

2.  Mode 1 is intended for hydronic heating. 

The set-point for inlet water control is 
pre-set to 180°F and the auto re-set limit 
is set to 230°F. The inlet set-point can 
be adjusted, however the limit is fixed. 
In addition to the auto reset limit the 
factory installs a manual re-set limit set 
to 250°F. The control turns on the 
appliance pump and stages the 
appliance to maintain set-point target 
temperature at the appliance inlet 
temperature whenever an external heat 
demand is present. Once the external 
heat demand is removed, the control 
turns off the appliance and operates the 
appliance pump based on the purge 

feature

 

3.  Mode 2 is intended for hydronic heating. 

The set-point for inlet water control is 
pre-set to 180°F and the auto re-set limit 
is set to 230°F. The inlet set-point can 
be adjusted, however the limit is fixed. 
In addition to the auto reset limit the 
factory installs a manual re-set limit set 
to 250°F. The control turns on the 
appliance pump and stages the 
appliance to maintain set-point target 
temperature at the appliance inlet 
temperature whenever an external heat 
demand is present. Once the external 
heat demand is removed, the control 
turns off the appliance and operates the 
appliance pump based on the purge 
feature. The control turns on the 
appliance pump and stages the 
appliance to the set-point target 
temperature at the system temperature 
whenever an external heat demand is 
present. Once the last appliance stage 
turns off and the heat demand is still 
present, the control then operates the 
appliance pump based on the purge 

feature. In this case, it is imperative that 
the system pump operates continuously 
in order to provide constant circulation 
past the system sensor. The appliance 
pump then turns back on with the first 
stage of the appliance. If the heat 
demand is removed, the appliance is 
turned off and the control operates the 
appliance pump P1 based on the purge 
feature. 

 

4.  Mode 3 is intended for domestic water 

heating. The set-point for inlet water 
control is pre-set to 140°F and the auto 
re-set limit is set to 200°F. The inlet set-
point can be adjusted, however the limit 
is fixed. In addition to the auto reset limit 
the factory installs a manual re-set limit 
set to 210°F. The control turns on the 
appliance pump and stages the 
appliance to maintain set-point target 
temperature at the appliance inlet 
temperature. An internal demand is 
generated from the DHW sensor which 
could be placed in the storage tank 
while the external heat demand is 
permanently wired or through a timer. 
Once the DHW tank is satisfied (internal 
demand is removed), the control turns 
off the appliance and operates the 
appliance pump based on the purge 
feature. 

 

Summary of Contents for MicoFlame Grande MFH2000

Page 1: ...e WHAT TO DO IF YOU SMELL GAS o Do not try to light any appliance o Do not touch any electrical switch do not use any phone in your building o Immediately call your gas supplier from a neighbour s pho...

Page 2: ...TEMPERATURE SYSTEMS 11 7 6 INSTANTANEOUS WATER HEATER 11 7 7 HOT WATER SYSTEM PIPING 11 8 INSTRUMENTATION AND CONTROLS 15 8 1 SAFETY CONTROLS 15 8 2 CONTROL PANEL 15 8 3 CONTROL DEVICES 18 9 OPERATIO...

Page 3: ...in the copper coils or tubes is not a fault of the boiler and is not covered by warranty Consult the factory for recommendations for use in hard water areas Excessive pitting and erosion on the inside...

Page 4: ...and Applicable provisions of the local building codes The operation of exhaust fans compressors air handling units etc can rob air from the room creating a negative pressure condition leading to reve...

Page 5: ...PLY This appliance is intended to operate at inlet gas pressures not exceeding PSI 14 W C The appliance and its individual gas shut off valve must be disconnected from the supply piping when pressure...

Page 6: ...xhaust fans such as range hoods and bathroom exhausts so they will operate at maximum speed do not operate a summer exhaust fan Close fireplace dampers d Place in operation the appliance being inspect...

Page 7: ...in operation using lighting instructions provided 8 While the appliance is operating check for flue gas leaks and proper vent operation Seal any flue gas leaks using appropriate gasket or sealing mate...

Page 8: ...vent manufacturer Aluminium tape must meet the provisions of SMACNA AFTS 100 73 Standard When venting through unheated spaces with single wall vent insulation must be properly wrapped around the vent...

Page 9: ...tic hot water and hydronic space heating Recommended piping arrangement is shown in Figure 3 Maximum capacity through the CHRM is summarized in Table 5 flows in excess of 60 GPM must be bypassed Figur...

Page 10: ...st be protected from down drafts rain and debris by using a listed chimney cap Approval of the installation will be at the discretion of authorities having jurisdiction Sidewall and Vertical Venting T...

Page 11: ...isolation of the heat exchanger for servicing If the appliance is installed above radiation level it must be provided with a low water cutoff device at the time of appliance installation This applianc...

Page 12: ...e GPM flow by 15 and the head loss by 20 The following example demonstrates the procedure to follow for calculating the revised head for the heat exchanger when using a water glycol mixture Given that...

Page 13: ...tlet valve until the inlet temperature climbs to 115 F d If the inlet temperature is greater than 115 F but not greater than 140 F no further adjustment is required e Check the inlet temperature after...

Page 14: ...12 Figure 7 Typical Heating System Figure 8 Typical Low Water Temperature System...

Page 15: ...13 Figure 9 Typical Instantaneous Water System Figure 10 Typical Water Heating System...

Page 16: ...14 Figure 11 Typical Water Heating System...

Page 17: ...ell as T temperature rise 2 Six pre set modes of operation mode 1 2 4 and 5 for heating mode 3 for DHW and mode 6 for operation by a remote controller 3 Operation as an auto reset limit 4 Operation as...

Page 18: ...pliance pump based on the purge feature The control turns on the appliance pump and stages the appliance to the set point target temperature at the system temperature whenever an external heat demand...

Page 19: ...this case it is imperative that the system pump operates continuously in order to provide constant circulation past the system sensor The appliance pump then turns back on with the first stage of the...

Page 20: ...The ignition module is mounted on a rail just behind the outer jacket front access door The ignition module provide ignition sequence flame monitoring and safety shutoff for the pilot Fan Manager Ther...

Page 21: ...t one of the meter s terminals to the burner ground terminal on the S8600 and the other terminal to the burner ground wire Pilot running without main burner will generate 1 5 A average for best operat...

Page 22: ...iation for at least 1 hour Check water level in expansion tank If level exceeds of tank volume air is still trapped in system Shut down appliance and continue to run pumps Within 3 days of start up re...

Page 23: ...Fire Low Fire Three Stages Stage 3 High Fire High Fire High Fire Stage 1 Low Fire Low Fire Low Fire Stage 2 High Fire Low Fire Low Fire Stage 3 High Fire High Fire Low Fire Four Stages Stage 4 High F...

Page 24: ...ion circuit is completed between the sensor and the burner ground The flame sensing circuit in the ignition module detects the flame current shuts off the spark generator and energizes the combination...

Page 25: ...1 9 4000 1 9 2 2 1 9 2 2 1 9 2 2 1 9 2 2 FLUE SWITCH RECYCLE POINT W C MODEL Burner 1 Burner 2 Burner 3 Burner 4 2000 1 5 1 9 1 5 1 9 2500 1 1 1 5 1 1 1 5 1 1 1 5 3000 1 5 1 9 1 5 1 9 1 5 1 9 3500 1 2...

Page 26: ...he electrode does not appear overheated or fouled with carbon It may be necessary to clean the ignition electrode using steel wool Once the pilot appears to be properly set reinstall it into the appli...

Page 27: ...of sufficient water flow Under these conditions the appliance must be shut down immediately and the heat exchanger checked for damage If the exchanger is damaged from improper installation or operati...

Page 28: ...re that igniter and ground electrodes are positioned properly Clean with steel wool if necessary Verify that back of burner box is fully engaged into the retaining slot in the combustion chamber base...

Page 29: ...CTRICAL DIAGRAMS Each MicoFlame Grande appliance will be provided with its own wiring diagram to guarantee that any options ordered with the unit are properly detailed The following diagrams 99 5082 1...

Page 30: ...28...

Page 31: ...29...

Page 32: ...30 16 EXPLODED VIEW MicoFlame Grande...

Page 33: ...31 17 EXPLODED VIEW MicoFlame Grande Outdoor and or Condensing...

Page 34: ...4232 14 4232 14 4232 14 4232 14 4232 23 Fan Mounting Support Right 14 4233 14 4233 14 4233 14 4233 14 4233 24 Burner Door Stop 14 4234 14 4234 14 4234 14 4234 14 4234 25 Heat Exchanger Header Stop Bar...

Page 35: ...standard warranty 2 Years six through ten replacement purchase price pro rated at the following schedule Year six 60 Year seven 65 Year eight 70 Year nine 75 Year ten 80 of the current list price of t...

Page 36: ...uilt water heaters and heating boilers as well as a into every single unit For more information supplier of specialty HVAC products Our service line is open 24 hours 7 days a week on our innovative pr...

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