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