L7148F ELECTRONIC AQUASTAT
®
CONTROLLER
7
68-0189—2
Fig. 5. Wiring L7148F in a gas-fired, forced hot
water, tankless, zoned, pump system.
Fig. 6. Wiring L7148F in multizone system
with R845 Switched Circulator.
1
2
3
4
5
6
T
T
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, COM, 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
M11477B
PUMP
PUMP
PUMP
T87F
R845 RELAY
T
T
1
2
3
4
5
6
T87F
R845
T
T
1
2
3
4
5
6
T87F
R845
L2
CIRCULATOR
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
5
OPTIONAL VENT
DAMPER PLUG
C1
G
L1
C2
L2X
L1X
B2
B1
R
C
R
DATA
PORT
ST
ATUS
THERMOST
AT
C
W
R
S1 S2
4
4
4
4
4
3
3
TR
TH
THTR
LOW
VOLTAGE
GAS VALVE
(VR8300)
L1
(HOT)
L2
1
1
2
2
3
3
4
4
4
4
3
4
5
6
5
1
2
4
6
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, COM, 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.
M11481B
R
W
C
B2
B1
C1
R
C2
L1
L2
G
S1
S2
24V
THERMOSTAT
CIRCULATOR
ZONE 1
L7148F
2
1
4
3
5
6
R845A RELAY ZONE 1
TO ADDITIONAL R845A
RELAYS FOR OTHER ZONES
LOW VOLTAGE
GAS VALVE
(VR8300)
TR
TH
THTR
L2X
L1X
C
R
24V
DATA
COM
TO
ADVANCED
FEATURE
MODULE
TO
BOILER
SENSOR
