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Consult vent pipe manufacturer’s instructions for 
proper method of sealing vent pipe sections and 
fittings. In the absence of instructions, make 
sure that pipe and fittings are clean by swabbing 
with alcohol. Use Dow Corning 736 or 732 RTV, 
Polybar # 500 RTV or Sil-bond 4500 or 6500 to 
seal vent pipe. Do not use other sealants or 
adhesives except as expressly permitted by vent 
manufacturer’s instructions. 

Consult vent pipe manufacturer’s instructions for 
vent system assembly. Follow vent pipe 
manufacturer’s instructions if those instructions 
differ from this section. 

Conventional Venting 

Multiple appliances may be vented into a 
conventional chimney. The chimney must be 
lined with AL29-4C or equivalent and a single 
acting barometric damper must be provided for 
each appliance. Vent diameters are to be 
increased by one size over the recommended 
size downstream of the barometric damper. 

A qualified professional using a proven vent-
sizing program with input of accurate operating 
parameters must properly calculate sizing of the 
venting system. In applications where flue gas 
temperatures are lower than can support a 
Category II with conventional negative draft, it 
will be determined at the venting design stage 
that a positive pressure will be developed in the 
vent. It will then be necessary to either provide 
separate vents as for Category IV, to pressurize 
the boiler room, or to provide an extractor at the 
chimney outlet in order to maintain a negative 
draft in the chimney and allow common venting. 

The chimney must 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 

The maximum vent length is 100 equivalent feet. 
Vent pipe may be run through a vertical or 
horizontal chase provided that minimum 
clearances to combustible materials are 
maintained. The vent should terminate a 
minimum 12 inches above grade plus normally 
expected snow accumulation, or 7 feet above 
grade if located adjacent to public walkways. Do 
not install over public walkway where local 
experience indicates condensation or vapour 
from the boiler creates a nuisance or hazard. 

Minimum 3 feet above any forced air inlet 
located within 10 feet of vent termination. 
Minimum 4 feet below, 4 feet horizontally or 
above any door window or gravity air inlet. 
Minimum 4 feet horizontally from electric meters, 
gas meters, regulators and relief valves. Use 
appropriately designed thimbles when passing 
through combustible walls or roofs. Install fire 
stops where vent passes through floors, ceilings 
or framed walls. The fire stop must close the 
opening between the vent pipe and the 
structure. Locate vent terminal above 
combustion air intake terminal (if used) and no 
closer than 2 feet vertically or horizontally. 
Vertical venting requires flashing and a storm 
collar to prevent moisture from entering the 
structure. Vertical vent termination must be at 
least 2 feet plus the expected snow 
accumulation above the roof penetration height. 

Figure 4 – Secondary Heat Exchanger 

  

 

Table 5 – CHRM Head Loss & Flow for 10

o

F Rise 

 

Model 

US GPM 

P - Ft. 

2000 

40.0 

5.5 

2500 

50.0 

8.0 

3000 

60.0 

11.5 

3500 

40.0* 

8.5 

4000 

46.0* 

11.0 

*Flow for 15°F rise at high fire 

 
 
 
 
 
 
 

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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