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Fig
6
l404
with
a
low
voltage relay
LOW
VOLTAGE
RELAY
24
VOLT
THERMOSTAT
L1
HOT
POWER
1
SUPPLY
a
L2
LOAD
PROVIDE
DISCONNECT
MEANS
AND
OVERLOAD
PROTECTION
AS
REQUIRED
M8940
Fig
7
l404F
l604A
Oump
r
installed
used
as
a
high
limit
with
an
alarm
circuit
SPOT
CONTROUER
LOW
UMfT
Ll
HOT
POWER
SUP
PLY
12
FlAME
SAFEGUARD
CONTROL
MOTOR
OR
OTHER
LOAD
PROVIDe
DISCONNEct
MEANS
AND
OVERLOAD
PROTECTION
AS
REQUIRED
BREAKS
R
TO
W
AND
MAKES
R
TO
B
WHEN
PRESSURE
FALLS
TO
SETPOINT
MINUS
DIFFERENTIAL
MB937
L404A
D
F
L604A
L
M
INSTALLATION
Fig
8
l404F l604A
with
jumper
installed
or
l604M
used
as
a
low
limit
with
an
alarm
circuit
SPOT
CONTROUER
HIGH
UMIT
Ll
HOT
POWER
SUPPLY
Lb
12
FlAME
SAFEGUARD
CONTROl
MOTOR
OR
OTHER
LOAD
ALARM
PROVIDE
DISCONNECT
MEANB
AND
OVERLOAD
PROTECTION
AS
REQUIRED
BREAKS
R
TO
B
AND
MAKES
R
TO
W
WHEN
PRESSURE
RISES
TO
SETPOINT
M8938
Fig
9
L404F
or
L604
wlth
jumper
installed
controlling
an
M644B
motor
SPOT
CONTROLLER
UNEVOLTAGE
lWO
POsmON
MOTOR
CLOSED
LOW
ARE
W
WHITE
OPEN
HIGH
FIRE
Ll
HOT
POWER
SUPPLY
ill
L2
BLACK
BLACK
MB44B
PROVIDE
DISCONNECT
MeANS
AND
OVERLOAD
PROTECTION
AS
REQUIRED
BREAKS
R
TO
B
AND
MAKES
R
TO
W
WHEN
PRESSURE
RISES
TO
SETPOINT
M8939