49
VI. Boiler Operational Sequence
Sage Boiler Control Instruction Manual Page 6 of 52
Product Features
Boiler Sequence
SI
CS
SI
CH
AL
DP
O+,O-
VI
BP
-
-
2,30
SP
25 ,30
70 ,71 ,
72
Outdoor Air Temp >
Warm Weather Shutdown Setpoint
-
Relay Outputs Interlock Inputs
Terminal Number
Parameter/Note
Low Fire Hold
Spare Output
Boiler Pump
System Pump
Modulation Outputs
Call For Heat Relay
Domestic Hot Water Priority
Flame Safeguard Alarm
Parameter / Notes
20 ,74
Limits
Inputs
9
Call For Heat
Lockout Indicator
(Manual Reset Required)
LO
-
44 ,30 ,
75
Fuel Valve Energized
Recycling Limits
(LC, OO, WF, GP and HL inputs)
Pump P urge
Main Ignition
Low Fire Hold
Purge / Pilot Ignition
Low Fire / Ignition
Pump Cooldown
Boiler Running
BOILER STATE
LCD Display
System Pump Feedback
9
-
8,27,
28
-
Non-Recycling Limits
(Combustion Air Flow (CA Input))
Blower High Speed
Purge %
Modulation
Low Fire %
Blower 0 Volts
V+,V-,
P+,P-
49
52
-
9,51/f
50
R+,R-
OR
BO,BC
SO
10
System Pump Backup Pump
SO
10 ,27 /
e
Combustion Air Damper
SO
10
System Alarm
L C , OO ,W F,
GP ,HL
CA
Mixing Valve Output
MS,MR
6,79,
80
Firing Rate
Boiler Disable
RO
Boiler Disable or Remote On/Off
-
-3/d - - -53 4/d
Spare Output On
Call For Heat Relay On
Recycling Limits Made
Call For Heat
Non-Recycling Limits Made
-
Warm Weather
Shutdown
Standby
Lockout
Limit Hold
Combustion Air Damper Open
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
b &ca aa
Fan Post Purge
54/d
Boiler Pump On
Domestic Hot Water Demand Monitored
System Pump On
System Pump Feedback Monitored
Starts in response to System Pump Feedback Input SI
Alarm Status is Monitored
Modulate
Boiler Enable/Disable On
Start/Stop Sequence StatesPre-Sequence States
Notes
a. Boiler Pump is “On” when the Boiler Pump is set to “On Always” or the boiler is lead boiler and Boiler Pump is set to “On Lead”.
b. Boiler Pump is "On" when the Boiler Pump is set to "On Always" and WWSD is set to "WWSD of System Pump" or “Off”.
c. System Pump is "On" when the System Pump is set to “yes” and WWSD is set to either "WWSD of Boiler" or "Off".
d. Boiler pump is "On" during Prepurge and Post Purge when Boiler Pump is set to "Purge" or boiler is lead & Boiler Pump is set to “On Lead”.
e. Combustion Air Damper Spare Output is maintained “On” for 2 minutes after the Call For Heat is removed.
f. Modulation rate is held at purge % when low fire input is not provided.
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