Siemens LME7 Series - Page 51

LME Series
Technical Instructions
Document No. LME-1000
Lockout
Standby, Waiting for Call
for Heat
Test - Air Pressure Switch
Open
Blower On
D
rive to Prepurge
Position
Test - Air Pressure Switch
Closed
Prepurge
D
rive to Ignition Position
Trial for Ignition
Flame Detection
Interval 1: Pilot
Stabilization
Safety Time 2: Pilot and
Main Overlap
Interval 2: Main
Stabilization
Operation
D
rive to Low Fire
Drive to Postpurge
Position
Postpurge
H
ome Run
Phase LOC OFF 21 22 24 22 30 36 40 42 44 50 oP1 oP oP1 72 74 10
Param. 259 225 260 257 230 231 232 240 212 234
Terminal Description Notes
X3-04.5 Main Voltage
X3-04.1 Safety Loop X X
X5-03.1 Burner On M
X3-02.1 Air Pressure Switch X M
X5-01.2 Gas Pressure Switch(es)
POC (P237 = 1)
POC (P237 = 2) X
X2-02.3 POC Source X X
X6-03.3 Safety Valve X X
X2-01.3 Blower X X X
X4-02.3 Ignition Transformer X X X X X X X X X X X X X X X X X
X7-01.3 Pilot Valve Note 1 X X X X X X X X X X X X X X
X7-04.4 Main Valves Note 1 X X X X X X X X X X X X X X
X2-03.3 Alarm X X X X X X X X X X X X X X X X X
X2-09.3 Drive to High Fire X X X X X X X X X X X X X X
X2-09.2 Drive to Low Fire X X X X X X X X X X X X X X X X
X7-02.3 Drive to Ignition X X X X X X X X X X X X X
X2-09.1 Drive Closed X X X X X X X X X X X X X X X X
X2-09.4 Position Feedback M M M M M
Legend :
Energized X De-energized
Energized or de-energized M
Must be energized by end of phase
INPUTS
X2-02.4
ACTUATOR
X
OPERATION
OUTPUTS
X
X10-05.2
X10-06.1/2
STARTUP
PME73.812A1 Phase Diagram
X
SAFETY
TIME 1
Flame Signal
SHUTDOWN
SCC Inc. Page 11 Section 3