Honeywell aquastat l8124l User Manual
L8124A,C,E,L AND M AQUASTAT® RELAYS
95-6571—11
6
Fig. 9. L8124E in a 24 Vac, gas-fired, forced hot water, tankless, zoned pump system.
Fig. 10. L8124E multizone system with circulator connections and internal schematic.
L1
(HOT)
(HOT)
L2
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
T
T
1
2
3
4
5
6
M1794A
TH
1
2
3
TR
LOW VOLTAGE
GAS VALVE
(eg, VR8300)
GAS VALVE
(eg, VR8300)
L8124E
AQUASTAT® RELAY
AQUASTAT® RELAY
G
L2
L1
C1 C2
T
T
B2 B1
T87F
R845 RELAY
T
T
1
2
3
4
5
6
T87F
R845 RELAY
T
T
1
2
3
4
5
6
T87F
R845 RELAY
PUMP
PUMP
PUMP
M8828
L1
(HOT)
(HOT)
L2
1
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
OVERLOAD PROTECTION AS REQUIRED.
CONTROL CASE MUST BE CONNECTED TO EARTH
GROUND. USE GROUNDING SCREW PROVIDED.
GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
2
1
4
3
5
6
ZONE 1
LOW VOLTAGE
THERMOSTAT
LOW VOLTAGE
THERMOSTAT
R845A RELAY ZONE 1
ZONE 1
CIRCULATOR
CIRCULATOR
TO ADDITIONAL
R845A RELAYS
FOR OTHER ZONES
R845A RELAYS
FOR OTHER ZONES
2
3
LOW VOLTAGE
GAS VALVE (eg, VR8300)
GAS VALVE (eg, VR8300)
C2
C1
B2
B1
R
B
HIGH
LIMIT
LIMIT
Z
1K1
B
R
W
LOW LIMIT/
CIRCULATOR
CIRCULATOR
1K
2
1
G
T
TV
L8124E
1K2
TR
TH
THTR