NTI Matrix M100 Installation And Operating Instructions Manual

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NTI Matrix M100 Installation And Operating Instructions Manual Manual pdf 37 page image

37Matrix Installation and Operation Instructions10.0 MATRIX BLOWER OPERATION10.1 Forced Air HeatingThe Matrix forced-air heating module is a step-modulated system, which provides varying heat output rates by adjusting air flowand water temperature through a fan coil.On an initial thermostat call (24VAC @ W1), space heating begins by providing heat at Stage 3 (~24,000 BTU/hr) (if hydronic heatis also calling (24VAC @ H) heating will begin at stage 1) and so long as the thermostat is not satisfied, incrementally increases toa maximum of Stage 10 (maximum output). When the thermostat becomes satisfied, an average of the heat output rate during thecall is calculated. The boiler remains lit and the space heat output begins an incremental decrease in heat output rate beginning withthe stage just below the calculated average and ending with either the thermostat re-calling or if the thermostat never re-calls, theoutput rate decreases to minimum stage after which the boiler shuts off.If the thermostat re-calls prior to the minimum heat stage, a new calculated average of the thermostat off cycle is calculated and theboiler again begins an increasing ramp, only this time it begins at the calculated stage and not necessarily at the minimum stage.This computation “hunts” for the heat loss of the dwelling based on the reaction of the thermostat to the rise and fall of the spacetemperature and the heat cycle rate of the thermostat.If at any time the plenum temperature exceeds 160°F, the boiler will stop supplying heat until the temperature in the supply plenumdrops below 140ºF, during which time an AL2 error message will be displayed.ATTENTIONThe burner will remain on and the Matrix will provide heat when the thermostat is off. This is normal and isrequired to provide constant efficient heat.Table 10.1 Fancoil Output ChartHeat Profile 1 (PF1) Heat Profile 2 (PF2) Heat Profile 3 (PF3)HeatingStage CFM Set Point(°F)Air Temp(°F) Btu/Hr Out CFM Set Point(°F)Air Temp(°F) Btu/Hr Out CFM Set Point(°F)Air Temp(°F) Btu/Hr Out1 400 108 104 14000 400 108 104 14000 400 108 104 140002 550 110 104 19000 550 110 104 19000 550 110 104 190003 670 113 105 24000 670 113 105 24000 670 113 105 240004 720 117 108 27700 730 122 112 31500 750 128 116 355005 760 120 110 31400 790 131 118 39100 820 141 125 471006 810 124 112 35100 850 138 122 46700 900 152 132 587007 860 127 114 38800 910 145 127 54200 975 163 139 702008 900 130 115 42500 970 152 131 61800 1050 172 144 818009 950 133 117 46300 1030 158 134 69400 1120 181 149 9340010 1000 136 118 50000 1100 164 137 77000 1200 190 153 105000Actual Output rates may vary fromwhat is shownExample. At stage 4 (Profile 1) the Matrix provides 720 CFM across the fan coil, which is receiving 117°F water from the boiler. Thecoil then supplies plenum air at 108° F or ~27700 BTU/hr.