Lochinvar 399 - Manual (Page 65)

Installation and
Service Manual
65
LADDER DIAGRAM 399,999 - 750,000 BTU/HR
MODELS
NC
NC
NO
ALARM INPUTS
1, 2, & 3
JOIN HERE
S2/
FS
-
+
F2
F1
NEU
LINE
S1
O
R
PRESSURE
SWITCH
RESET
PURGE
GY
GY
PUMP RELAY
BK
STAGE #2
STAGE #1
16 15
18 17
20 19
HEAT
DEM
#1
EL
EC
TR
O
N
IC
TE
MP
ERA
TU
R
E
CO
NT
R
OL
LE
R
OPTIONAL
RUN TIME
RELAY
CONTACTS
LBL20008 REV A
24 VAC
12 24
23
120 VAC
1
14 13
+ -
HD-
Y
Y
W
CHASSIS
GROUND
-
INTERMITTENT
ALARM ENABLE
RELAY
Y
Y
2NO 2C
1NO 1C
3NO 3C
BK/W
G
W
Y
OPTIONAL
CONTACTS
ANY FAILURE
IGNITER
TRIAL
GY
GY
BK
P
O O
BR BR
W
CIRCUIT BREAKER
BL
+
ALARM
CONTACTS
OPTIONAL ALARM
BELL 24V OUTPUT SILENCE
BL
G
BL
Y
A1 B1 A2 A3 B2 B3
CONTINUOUS INTERMITTENT
FLOW
SWITCH
O
Y
CHASSIS
GROUND
SE
NS
O
R
S
BK
1
2
BK
L A R T U E N E N I L
GROUND
O/
BK
BL
STAGE #1
STAGE #3
Y
Y
Y
W
W
R
R/O
R/BK
BL
R
120 VAC 15 AMPS
60Hz
O/BK
R/
BK
Y PR PR
Y
PR
BR/W BR/W
BR BR
W
PR PR
T
PR/BK PR/BK
BR/W
BR/W
BR/W
PR /BK
PR /BK
BR/W
Y Y
PROVING
SWITCH
MOTOR
CONTACTS
BK/W
ON/OFF
POWER
SWITCH
FIELD SUPPLIED LOUVER/
POWER VENTER CONNECTIONS
(1) WHERE POSSIBLE, ALL SWITCHES AND CIRCUITRY ARE SHOWN IN THEIR AT REST STATES .
NOTES:
(2) ADDITION OF ENERGY MANAGEMENT SYSTEMS OR OPTIONAL LIMIT SWITCHES TO THE TERMINAL
ITEM INDICATES
CLOSED END SPLICE
JUNCTION POINT
(ELECTRICALLY SAME)
T=TAN
Y=YELLOW
BR=BROWN
G=GREEN
GY=GRAY
W = WHITE
BK = BLACK
PR=PURPLE
BL=BLUE
P=PINK
O=ORANGE
(3) WHEN REPLACING DAMAGED WIRING, USE EQUIVALENT TYPE AND GAUGE.
TD
P
P
BL/
BK Y
PUMP
STAGE #2
STAGE #3
AE
PU
LE
BL/W
OPTIONAL LOUVER/
VENTER CONTROL RELAY
R
R
= RELAYS LO CATED O N CO NTRO L
PANEL
= RELAYS LO CATED IN WIRING BO X
OPEN
CLOSED COM
C2 NO2
Y/G = YELLOW WITH GREEN STRIPE
R=RED
HD#1
HD#2
ALARM
INPUT 1
PR
A1 B1 A2 A3 B2 B3
CONTINUOUSLY
MONITORED
INTERMITTENTLY
MONITORED
FIELD INSTALLED
SAFETY DEVICES
NOTE: SHOWN WITH SHORTING
BARS REMOVED AND ATTACHED
DEVICES IN NON-ALARM STATE.
CONTINUOUS INTERMITTENT
COM COM
FAIL
OK OK
FAIL
HIGH/LOW GAS, AUX. HI-LIMIT
AUX. LIMITS , EXT. FLOW SWITCH
EXAMPLE DEVICES:
BK
4
2
3
STAGE #1
STAGE #3
STAGE #2
PR
BR
1
2
6
5
4
3
OUTLET
BR
BR
PR
PR
PR
24VAC
PI
RESET
PS
TH
24COM
MV
1
2
4
5
6
7
8
9
11
3
10
- +
STATUS
8
9
7
6
4
5
T/W
Y
~ ~ ~
~ ~ ~
BL
T
ER
MI
N
AL
S
TR
IP
IGNITION
MODULE
ALARM
INPUT 2
PR/BK
PR
P
BL/BK
SYSTEM/TANK
O.A.
SENSOR
FLAME
CURRENT
TEST PINS
RT
BK
W
GY GY
PUMP
OPTIONAL
ON BOILERS
BL
WARNING: THIS HEATER MAY BE
CONNECTED TO ONE OR MORE BRANCH
CIRCUITS. TO PREVENT ELECTRICAL SHOCK,
ENSURE ALL BRANCH CIRCUITS ARE DE-
ENERGIZED BEFORE ATTEMPTING TO SERVICE
THIS EQUIPMENT.
OPTIONAL
BOILER ONLY
INLET
R/BK
2
RESET
OVERRIDE
3
HEAT
DEM
#2
R/
O
FIELD
INSTALL AS
NECESSARY
C N.O.
REMOVE
JUMPER
STRIP REQUIRE THE REMOVAL OF SOME OF THE SHORTING BARS FROM THE TERMINAL STRIP.
R
R
PR/BK
O
5
1
OPTIONAL
PR
PR AL Y
P Y
PR
PR
= LEDS LO CATED O N DISPLAY BO ARD
= O PTIO NAL DIN RAIL CO NNECTO RS
LO CATED IN ELECTRICAL W IRING BO X .
C NO
PR
OPTIONAL HIGH-LOW GAS
PRESSURE SWITCHES
PR
LOW HIGH
INTERMITTENT
ALARM ENABLE
RELAY
C
C
NO
NO
C
NO
NO
C
NO
P
4NO 4C
STAGE #4
BL/BK
S2
R/O
C NO
Y
S3
C NO
BLOWER
W
~~~~ ~~~~
BK
LOW C
R/BK
Y
R
R
BR/W
PR
BR
IGN MOD - PS
P-SW
FF
PR/BK
THREE STAGE MODELS ONLY.
AUX. HI-LIMIT
PR
ALARM
INPUT 3
BL
OPTIONAL
MAN. RESET
BR
T
BL
PR
BR/W
LOUVER PROVING
CONNECTOR
R/BK
R/O
P
STAGING RELAY
STAGING RELAY
ALARM
FFR
Y
BL
PR/
BK
NO
C
BL
BR
W W
BK
PR
T
BK
T/W
W
BK/R
BK
HIGH
5
4
3
2
1
W
LINES CROSS OVER
DOTTED LINE
INDICATES OPTIONAL
EQUIPMENT
DIN RAIL CONNECTOR
EXAMPLE:
SCHEMATIC DIAGRAM SINGLE IGNITION MODULE UNIT
C
BK
TO POWER
SOURCE
W
J3
5
4
6
1
2
3
O .C.
J1
J 2
3 2 1 J4
P GND
GND
RESET
PR
T
PROBE
9
6
5
7 5
7
6
9
BL
O P R P R 4 4
BL
Y
Y
PR
BL/
BK BL/
BK
BL/
BK
BL/BK
O/BK
RESET
~~
~~
~~
~~
~~
~~
Y
O
PR
O
O
P R
BL
PR 24 VAC
LWCO
P R
TEST