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The Control is shipped with defaults that will provide improved operation. Adjustment is only required to optimize
setup.
The expected heat rate adjustment is used to better match boiler output to the home heating needs. After receiving
a “call for heat” the Control first uses the expected heat rate value to set a maximum heat rate. The maximum heat
rate is the highest heat rate that the boiler can fire to at that moment. The maximum heat rate is the summation of
the expected heat rates for the active (turned on) zones. After establishing the maximum heat rate the Control then
measures water temperature and fires the boiler only as hard as required for the heat demand.
Sage Zone Panel Expected Heat Rate Adjustment Screens (HeatMatch Software)
Example “call for heat”
durations for a four
zone house.
Maximum heat rate
limits firing rate and
prevents the Control
from firing to 100% in
response to a smaller
zone demands.
Maximum Heat Rate:
Automatically adjusted
by the Control based
on the size and
number of zones
calling for heat.
Actual Heat Rate:
Boiler is free to
modulate based
on temperature
from minimum to
maximum heat rate.
Figure 13.11: Four Zone House (with Sage Zone Control Connected)
XIII. Operation
F. Changing Adjustable Parameters (continued)
Figure 13.12: Expected Heat Rate Adjustment (with Sage Zone Control Connected)
Note
This feature requires
Zone Control
to be connected. Refer to Electrical
section for Zone Control connection
information.
The sum of Zone Expected Heat Rates
is used to calculate the active maximum
modulation rate
Maximum modulation numbers are
shown in both RPM and kbtu/hr to
allow for easier understanding of boiler
heat rate.
Summary of Contents for K2WTC-135
Page 81: ...81 107774 02 4 18 X Domestic Hot Water Piping continued Figure 10 1 Domestic Hot Water Piping...
Page 89: ...89 107774 02 4 18 XI Wiring continued...
Page 90: ...90 107774 02 4 18 Figure 11 8 Internal Wiring Connections Diagram XI Wiring continued...
Page 101: ...101 107774 02 4 18 Lighting and Operating Instructions XII Start Up and Checkout continued...
Page 142: ...142 107774 02 4 18 XVI Repair Parts continued...
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Page 159: ...159 107774 02 4 18 SERVICE RECORD DATE SERVICE PERFORMED...
