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
L1
L2
DISCONNECT
SWITCH
1
7
TO ADVANCED
FEATURE
MODULE
TO BOILER
SENSOR
24V
COM
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
