Sequence Of Operation - NTI Matrix M100 Installation And Operating Instructions Manual

Matrix Installation and Operation Instructions

14.0 SEQUENCE OF OPERATION

Figure 14.1 Matrix Boiler Control Sequence Of Operation
120v Power
Applied
Closed
Error
A S C
VDC Signal
to Combustion
Blower
Error
A S O
Sentry 2100
modulates combustion
blower based upon setpoint
and programing
Call for flame ends
Displays version
b1.0
Furnace Control
closes T-C circuit.
Forced Air Demand
N/O
Open
Open
Closed
Power to Ignitor
120V to S1
Igniter warm-up
5 seconds
Power to Gas Valve
Boiler in
standby mode
Furnace Control
Awaiting Input
closes A-C circuit.
From Furnace Control
at Contacts A-C-T
Furnace Control closes
A-C and T-C circuit.
Hydronic Demand
Energizes Internal
Circulator (C1)
Sentry 2100
Sentry 2100
Sentry 2100
Combustion Blower
Starts, SFS (80)
Prepurge
Checks Flame
Probe Signal
Greater than 1.0 uAmp
50
DHW Demand
`
Sentry 2100
24 V
Water Temperature Limit
&
Flue Gas Temperature Limit
&
Water Pressure Limit
Check
24 V
Three
Retries
for Flame
Less than
0.6 uAmp