Honeywell Electronic Aquastat L7148F - Page 6

L7148F ELECTRONIC AQUASTAT
®
CONTROLLER
68-0189—2 6
Table 2. Sequence of Operation
Fig. 4. Wiring L7148F with multizone valves.
Thermostat
Operation
Mode Burner Circulator
Off Normal Off Off
Off High Limit Off Off
On Normal On On
On High Limit Off On
Either Reset Off Off
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
GROUND MUST BE AN EARTH GROUND CONNECTION.
ADD JUMPER AS SHOWN.
FOR EXTERNAL TRANSFORMER VA REQUIREMENTS,
REFER TO APPLICATION SECTION.
B1 AND S1 ARE 3/16 INCH. QUICK CONNECT TERMINALS
.
ALL OTHER TERMINALS ARE 1/4 INCH.
C, COM, Z, B2, G ARE ALL CONNECTED INSIDE DEVICE.
R IS A CONVENIENCE TERMINAL FOR 24V HOT
CONNECTION FOR USE WITH IGNITION CONTROLS.
1
2
3
4
5
6
7
M11475B
L1
(HOT)
L2
1
4
3
TR
TH
TH-TR
T87F
ZONE 3
T87F
ZONE 2
T87F
ZONE 1
END SWITCH
V8043F
3
TR
TH
TH-TR
END SWITCH
V8043F
3
TR
TH
TH-TR
END SWITCH
V8043F
COM
L7148F
HIGH LIMIT DIAL
2
L
1
L
2
DISCONNECT
SWITCH
1
7
TO ADVANCED
FEATURE
MODULE
TO BOILER
SENSOR
24VCOM
L2X
L1X
C
R
4
OPTIONAL VENT
DAMPER PLUG
COM
BURNER
CONTROL
24V HOT
TO VALVE
OR
IGNITION
CONTROL
C1
G
L1
C2
L2
L2X
L1X
B2
B1
R
C
R
DATA
PORT
STATUS
THERMOSTAT
C
W
R
S1 S2
6 6
6
6
6
5
5