Thermal Solutions EVS SERIES, Installation, Operating And Service Instructions

Page: 49 / 92

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
-
R
el
ay
O
ut
put
s
Int
er
loc
k
In
put
s
Te
rm
ina
l N
um
be
r
Pa
ra
m
et
er/
N
ot
e
Low Fire Hold
Spare Output
Boiler Pump
System Pump
M
od
ul
at
ion
O
ut
pu
ts
Call For Heat Relay
Domestic Hot Water Priority
Flame Safeguard Alarm
Parameter / Notes
20,74
Lim
its
Inp
ut
s
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)
Pu
m
p P
ur
ge
M
ain
Ig
nit
io
n
Low
Fi
re
H
ol
d
Pu
rg
e / P
ilo
t Ig
nit
io
n
Lo
w
F
ire
/ Ig
nit
io
n
Pu
m
p C
oo
ld
ow
n
B
oil
er
R
un
nin
g
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
LC, OO ,WF,
GP,HL
CA
Mixing Valve Output
MS,MR
6,79,
80
Fir
in
g
R
at
e
B
oil
er
D
is
ab
le
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
-
W
ar
m
W
eat
her
Sh
ut
do
w
n
St
an
db
y
Lo
cko
ut
Li
m
it H
old
Combustion Air Damper Open
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
V+,V-,
P+,P-
b &c a a a
Fa
n Po
st
Pu
rg
e
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 States Pre-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.