95-5971—2
4
L4008A,B,E,L; L6008A,G,H REMOTE BULB AQUASTAT
®
CONTROLLERS
Home and Building Control
Honeywell Limited-Honeywell Limitée
740 Ellesmere Road
Scarborough, Ontario
M1P 2V9
Helping You Control Your World
95-5971—2 J.H. Rev
. 9-95 Printed in U.S.A
QUALITY IS KEY
Home and Building Control
Honeywell Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Adju
s
ting L
6
008G Inter
s
tage Differential
The L6008G Controller has an adjustable interstage
differential. The setpoint adjustment knob determines the
temperature at which the right switch operates. The left
switch can be adjusted to operate from 3
°
to 10
°
F (1.7
°
to
5.6
°
C) above the point of operation of the right switch. The
Interstage differential is adjusted by turning the star wheel
with a narrow screwdriver inserted into the rectangular
hole in the chassis. See Fig. 8
CHECKOUT
WARNING
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY OR DEATH.
This product is intended for use only in systems
with a pressure relief valve.
Check to be sure the Aquastat® controller is properly
installed and adjusted. Put the system into operation and
observe the action of the control through several cycles to
make sure that it provides proper control of the system as
described in the Operation section. Make any additional
adjustments necessary to assure comfort requirements.
M8972
RIGHT
SWITCH
LEFT SWITCH
STAR WHEEL (INTERSTAGE
DIFFERENTIAL ADJUSTMENT)
1
1
SELECT MODELS HAVE FOUR TERMINALS.
Fig. 8. Interstage differential adjustment on an L4008L
or L6008G.
95-5971—2
3
L4008A,B,E,L; L6008A,G,H REMOTE BULB AQUASTAT
®
CONTROLLERS
L1
(HOT)
L2
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
SELECT MODELS HAVE 1/4 IN. TAB TERMINAL FOR W
TERMINAL.
L4008A OR E
HIGH LIMIT
CONTROLLER
L6008A
CIRCULATOR
LOW LIMIT
CONTROLLER
R
W
B
CIRCULATOR
IGNITION
TRANSFORMER
RA89A RELAY
RA817A
PROTECTORELAY®
CONTROL
BURNER MOTOR
24V THERMOSTAT
2
13
4
T
T
1
2
3
4
M8785
Fig. 5. Typical oil-fired hydronic heating system with
domestic hot water.
SETTING
Control Point:
Insert a screwdriver in the slotted head visible through the
cover, and turn the indicating dial to the control point.
Temperature settings should be according to boiler
manufacturer’s recommendations.
Differential (on adjustable differential models):
Remove cover and move the differential adjustment wheel
(Fig. 1 or 7) to a point on the scale corresponding to the
desired differential. Replace cover.
Manual Reset (L4008E):
After boiler water temperature has dropped to a point
below the high limit setting, less differential, the reset
button at the front of the case must be pushed before the
burner can operate.
ADJUSTMENTS
Adju
s
ting Differential
Set the differential to correspond with the boiler manufacturer
recommendations. To adjust models with adjustable
differential, rotate the wheel on the back of the snap
switch, see Fig. 7, until the desired reading is aligned with
the V notch in the frame. The wheel provides as adjustment
from 5
°
to 30
°
F (3
°
to 17
°
C). Replace the cover on the
Aquastat® controller.
L1
(HOT)
L2
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
JUMPER
M8968
HEATING LOAD
NO. 2
HEATING LOAD
NO. 1
RR
BB
WW
21
L6008G
Fig. 6. Typical oil burner installation using L4008L
or L6008G.
L1
(HOT)
L2
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
L4008L
HL
TEMP
RA890F
6
5
T
4
T
3
F1
2
2
G
NC
NO
COM
PILOT
VALVE
IGNITION
MAIN
VALVE(S)
M4672
M8969
DIFFERENTIAL
WHEEL
NOTCH IN
FRAME
SNAP
SWITCH
SELECT MODELS HAVE A SCREW TERMINAL INSTEAD
OF TAB TERMINAL.
1
1
Fig. 7. Adjusting the differential.
Adjust the control point to correspond with the boiler
manufacturer recommendations. To adjust, insert a
screwdriver in the slotted screw type head located beneath
the window in the cover. Turn the scale to the desired
control point.
