High efficiency pump with control signal and release contact
When using a high efficiency pump that requires a release contact in addition to the control signal (e.g.
Grundfos Magna 3), the pump outlet of the hydraulic module is used to switch the release.
up to hydraulic module version FRHYU21
FRHYU21
N
Pumpe 1
Netz
P
E
L
N
P
E
L
AO-P1
L N
L
N
PE
22 12
24 14
21 11
A2 A1
230 VAC power supply
❒ Hydraulic module FRHYU21: Connect the relay to output “Pump 1” or “Pump 2” with RC element isolated
from the output
up to hydraulic module version FRHYU22
FRHYU22
N
AO-P1
Pumpe 1
Netz
P
E
L
N
P
E
L
L
L N
L
N
PE
22 12
24 14
21 11
A2 A1
230 VAC power supply
❒ Hydraulic module FRHYU22: Connect the pump relay to output “Pump 1” or “Pump 2” and use the relay
output for phase (L)
❒ Install and connect two-pole cable (2 x 0.75 mm
2
) from connection “AO-P1” or “AO-P2” to the pump and
connect terminal “+” with terminal “IN” of the pump
❒ Install and connect two-pole cable (2 x 0.75 mm
2
) from NOC on the relay to the pump using terminal “S/S”
as the release contact
❒ Connect power supply at pump connector
❒ In relevant menu, set pump to “Field pump PDM + valve” or “Field pump 0-10V + valve”
Power connection and wiring
2
Expansion modules
Service manual Lambdatronic H 3200 for wood chip boiler | B1480721_en
19
