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Matrix Installation and Operation Instructions
10.0 MATRIX BLOWER OPERATION
10.1 Forced Air Heating
The Matrix forced-air heating module is a step-modulated system, which provides varying heat output rates by adjusting air flow
and 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 heat
is also calling (24VAC @ H) heating will begin at stage 1) and so long as the thermostat is not satisfied, incrementally increases to
a maximum of Stage 10 (maximum output). When the thermostat becomes satisfied, an average of the heat output rate during the
call is calculated. The boiler remains lit and the space heat output begins an incremental decrease in heat output rate beginning with
the stage just below the calculated average and ending with either the thermostat re-calling or if the thermostat never re-calls, the
output 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 the
boiler 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 space
temperature 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 plenum
drops below 140ºF, during which time an AL2 error message will be displayed.
ATTENTION
The burner will remain on and the Matrix will provide heat when the thermostat is off. This is normal and is
required to provide constant efficient heat.
Table 10.1 Fancoil Output Chart
Heat Profile 1 (PF1)
Heat Profile 2 (PF2)
Heat Profile 3 (PF3)
Heating
Stage
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 Out
1 400 108
104 14000
400 108
104
14000 400
108
104
14000
2 550 110
104 19000
550 110
104
19000 550
110
104
19000
3 670 113
105 24000
670 113
105
24000 670
113
105
24000
4 720 117
108 27700
730 122
112
31500 750
128
116
35500
5 760 120
110 31400
790 131
118 39100
820
141 125 47100
6 810 124
112 35100
850 138
122 46700
900
152 132 58700
7 860 127
114 38800
910 145
127 54200
975
163 139 70200
8 900 130
115 42500
970 152
131 61800
1050
172 144 81800
9 950 133
117 46300
1030
158
134 69400
1120
181 149 93400
10 1000 136
118 50000
1100
164
137 77000
1200
190 153 105000
A
ctual Output rates may vary from
what is shown
Example.
At stage 4 (Profile 1) the Matrix provides 720 CFM across the fan coil, which is receiving 117°F water from the boiler. The
coil then supplies plenum air at 108° F or ~27700 BTU/hr.
