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L4006,7,8; L6006,7,8 AQUASTAT
®
CONTROLLERS
60-2104—10 16
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.
Adjusting L6008G Interstage Differential
The L6008G Controller has an adjustable interstage
differential. The set point adjustment knob determines the
temperature at which the right switch operates. The left switch
can be adjusted to operate from 3° F to 10° F (1.7° C to 5.6° C)
above the point of operation of the right switch. See Figure 30
for the operation of the L6008G. The interstage differential is
adjusted by turning the star wheel with a narrow screwdriver
inserted into the rectangular hole in the chassis. (See Fig. 32).
Fig. 32. Interstage differential adjustment on an L6008G.
L6008A Location Differential Calibration
The L6008A1093 is calibrated for applications where the bulb
and controller case are located in the same control space.
If the bulb and controller case are located in separate rooms,
and if the temperature in the two rooms is different, an
adjustment is required. Adjust the dial setting (control space
temperature setting) to compensate for the difference in
temperature.
1. If the L6008A case is located in a room with a higher
temperature than indicated on the dial setting, raise the
dial setting the number of degrees listed in Table 3.
2. If the L6008A case is located in a room with a lower
temperature than indicated on the dial setting, lower the
dial setting the number of degrees listed in Table 3.
Table 3. Temperature Adjustments.
EXAMPLE:
In the example shown in Fig. 33, the L6008A case is
located in a room with a lower temperature than the
controlled space. Adjusting the controlled space setting (dial
setting) is necessary to compensate for the temperature
difference of 35° F (20° C) between the two rooms. Table 3
indicates that the dial setting should be lowered 5° F (3° C)
to compensate for the 35° F (20° C) temperature difference.
Manual Reset
If the device includes manual reset (L4006E, L4008E), be sure
to press the (red) reset button on the front of the case to make
sure that the controller is not locked out on safety. When
checking the system, adjust the limit setting low enough so the
temperature of the controlled medium reaches the high limit
setting. When the limit setting is reached, the Aquastat
Controller locks out and the burner shuts down. When the
temperature of the controlled medium drops to the high limit
setting, less the differential, push the manual reset button to
make the system operative again. Reset the control to the
proper high limit setting.
Fig. 33. L6008A calibration.
M8972
RIGHT
SWITCH
LEFT SWITCH
STAR WHEEL (INTERSTAGE
DIFFERENTIAL ADJUSTMENT)
1
1
SELECT MODELS HAVE FOUR TERMINALS.
Difference Between Desired
Room Temperature and
Case Temperature Reduce Dial Setting
°F °C °F °C
00—0
533/40.5
10 6 1-1/2 1
15 8 2 1
20 11 2-3/4 2
25 14 3-1/2 2
30 17 4-1/4 3
35 20 5 3
40 22 5-3/4 4
45 25 6-1/2 4
50 28 7 4
55 31 8 5
60 33 8-1/2 5
70 39 10 6
80 45 11-1/2 7
M8790A
WALL
L6008A
CASE
REMOTE
SENSING
BULB
CONTROLLED
SPACE
TEMPERATURE
115
o
F (46
o
C)
ROOM
TEMPERATURE
80
o
F (27
o
C)