L7148F ELECTRONIC AQUASTAT
®
CONTROLLER
11
68-0189—2
Fig. 11. Wiring L7148F with SV9501/SV9502/SV9601/SV9602 SmartValve™ System Controls.
CHECKOUT
Check to make certain that the Electronic Aquastat Controller
has been properly installed and adjusted. Put the system
into operation and observe the action of the device through
several cycles to make certain that it provides proper control
of the system as described in the Operation section.
TROUBLESHOOTING
When attempting to diagnose system performance,
reference to the diagnostic LED can help to identify specific
areas not working properly. Table 3 shows the LED codes.
Fig. 12 provides a troubleshooting chart.
Table 3. LED Codes.
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
GROUND MUST BE AN EARTH GROUND CONNECTION.
B1 AND S1 ARE 3/16 INCH QUICK CONNECT TERMINALS.
ALL OTHER TERMINALS ARE 1/4 INCH.
C, Z, B2, G ARE ALL CONNECTED INSIDE DEVICE.
FOR EXTERNAL TRANSFORMER VA REQUIREMENTS,
REFER TO APPLICATION SECTION.
R IS A CONVENIENCE TERMINAL FOR 24V HOT
CONNECTION FOR USE WITH IGNITION CONTROLS.
1
2
3
4
5
6
M11479B
24 VOLT
COMMON
24 VOLT
HOT
EFT
OUTPUT
24 VOLT
THERMOSTAT OR
PRESSURE SWITCH
PILOT BURNER
GROUND
(THROUGH
PILOT TUBING)
SV9501/SV9502;
SV9601/SV9602
COM
L7148F
HIGH LIMIT DIAL
2
L1
L2
DISCONNECT
SWITCH
1
6
TO ADVANCED
FEATURE
MODULE
TO BOILER
SENSOR
24V
COM
L2X
L1X
C
R
4
OPTIONAL VENT
DAMPER PLUG
C1
G
L1 C2
L2
L2X
L1X
B2
B1
R
C
R
DATA
PORT
ST
ATUS
THERMOST
AT
C
W
R
S1 S2
6
6
6
6
6
5
5
CIRCULATOR
TO THERMOSTAT
OR SWITCH
CLOSURES
FOR ZONES
Number of Blinks
Indication
Constant On
Power on—normal operation.
2
Sensor error—check connection
and/or replace sensor.
3 or 4
L7148F failures—replace control
