Honeywell Aquastat L4006, Installation Manual, Page: 16 / 20

Installation Guide
60-2104—01 14
OPERATION
L1
(HOT)
L2
1
L1
(HOT)
L2
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
LINE VOLTAGE
CONTROL CIRCUIT
L4006
LINE VOLT
THERMOSTAT
LOAD
LOW VOLTAGE
CONTROL CIRCUIT
L4006
LOW VOLTAGE
THERMOSTAT
1K
ELECTRIC
HEAT RELAY
LOAD
M1155B
Fig. 26 Typical systems with 120 volt electric heat
primaries. Use with L4006A,B; L6008A.
L1
(HOT)
L2
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
JUMPER
M8968C
HEATING LOAD
NO. 2
HEATING LOAD
NO. 1
R R
B B
W W
2 1
L6008G
Fig. 28. Typical oil burner installation using L4008G. Use
with L4006A,B; L6008A.
Fig. 27. Typical Powerpile System wiring diagram. Use
with L4006A,B; L6008A.
OPERATION
For proper selection of settings, follow the boiler
manufacturer recommendations.
WIRING
1
TEMPERATURE
RISE
SETPOINT
(ADJUSTABLE)
LEFT SWITCH
DIFFERENTIAL
RIGHT SWITCH
DIFFERENTIAL
BREAKS R-B
MAKES R-W
ON RISE
BREAKS R-B
MAKES R-W
ON RISE
BREAKS R-W
MAKES R-B
ON FALL
BREAKS R-W
MAKES R-B
ON FALL
INTERSTAGE
DIFFERENTIAL
DIFFERENCE BETWEEN THE TEMPERATURES AT WHICH THE
TWO SWITCHES MAKE R-W. ADJUSTABLE FROM 3°F TO 10°F
(1.7°C TO 5.6°C) ON STANDARD MODELS, OR FROM 3.6°F TO 12°F
(2.0°C TO 6.7°C); 55°F TO 175°F (13°C TO 79°C) MODELS.
TWO SPDT SWITCHES OPERATE IN SEQUENCE. EACH SWITCH
DIFFERENTIAL IS FIXED AT APPROXIMATELY 3°F (1.7°C) ON
STANDARD MODELS, OR AT 3.6°F (2.0°C); 55°F TO 175°F (13°C TO
79°C) MODELS.
1
2
1
2
2
M2999C
Fig. 29. Operation of L6008G. Use with L4006A,B;
L6008A.
High Limit Controller
R-B terminals provide high limit switching function
(contacts open at set point on temperature rise).
(See Figures 30 and 31). R-B terminals shut off
burner if water temperature exceeds high limit set-
ting. Burner restarts when temperature drops to
high limit setting, less differential.
NOTE: On manual reset models, the reset button
on the front of the case must be pushed
in to allow the burner to operate after a
high limit shutdown.
MILLIVOLTAGE
THERMOSTAT
L4006
HIGH LIMIT
CONTROLLER
MILLIVOLTAGE
VALVE OPERATOR
SAFETY
SHUTOFF
PILOTSTAT¨
POWER UNIT
POWER UNIT COIL
OPERATOR
COIL
PILOT
BURNER
M1156B