installation, operating and service instructions evca series ...

VI. Boiler Operational Sequence
Product Features
Boiler Sequence
Pre-Sequence States
Start/Stop Sequence States
BOILER STATE
LCD Display
Terminal Number
Parameter/Note
Boiler Disable
Warm Weather
Shutdown
Lockout
Standby
Pump Purge
Limit Hold
Purge / Pilot Ignition
Low Fire / Ignition
Main Ignition
Low Fire Hold
Boiler Running
Fan Post Purge
Pump Cooldown
Limits
Relay Outputs Interlock Inputs
Inputs
Parameter / Notes
Boiler Disable or Remote On/Off RO -
Outdoor Air Temp >
Warm Weather Shutdown Setpoint
Domestic Hot Water Priority
Low Fire Hold
Fuel Valve Energized
Flame Safeguard Alarm
System Pump Feedback
Call For Heat
Recycling Limits
(LC, OO, WF, GP and HL inputs)
Non-Recycling Limits
(Combustion Air Flow (CA Input))
Call For Heat Relay
Lockout Indicator
(Manual Reset Required)
Spare Output
Boiler Pump
System Pump
System Pump Backup Pump
O+,O-
DP
SI
CS
AL
SI
R+,R-
OR
BO,BC
LC , OO ,WF,
GP ,HL
CA
CH
VI
BP
44,30,
75
20,74
9
-
-
9
70,71,
72
8,27,
28
-
-
LO -
-
2,30
SP 25,30
SO 10
a
b &c
a
a 3/d - - - - 53 - 54/d 4/d
Boiler Enable/Disable On
Domestic Hot Water Demand Monitored
System Pump Feedback Monitored
Call For Heat
Recycling Limits Made
Non-Recycling Limits Made
Call For Heat Relay On
Spare Output On
Boiler Pump On
System Pump On
Starts in response to System Pump Feedback Input SI
Combustion Air Damper
System Alarm
SO
10,27/
e
SO 10
Combustion Air Damper Open
Alarm Status is Monitored
Modulation Outputs
Firing Rate
Mixing Valve Output
Blower High Speed
Purge %
Modulation
Low Fire %
Blower 0 Volts
MS,MR
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
Sage Boiler Control Instruction Manual Page 6 of 52
6,79,
80
49
52
-
9,51/f
50
46
Modulate
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.