W900 Series Controllers

Walchem Controllers | 24 Input - 8 Output Controllers

Walchem's W900 W900 Series Controllers

Identity Code

Relays

Wiring

Connection #1

Connection #2

Connection #3

Connection #4

Mount

Sensor #1

Sensor #1
N | No sensor
A | Graphite/PP cooling tower contacting conductivity (CT) - External Preamp (IN) - Boiler sensor with ATC, 250 psi, K=1.0, 20ft.cable (BL)
B | 316SS/PP cooling tower contacting conductivity (CT) - Flat pH with ATC (IN) - Boiler sensor no ATC, 250 psi, K=1.0, 20ft.cable (BL)
C | Cooling tower, electrodeless conductivity (CT) - Disinfection, no sensor (IN) - Condensate sensor with ATC, 200 psi, K=0.1, 10ft.cable (BL)
D | High pressure conductivity (CT) - PEEK electrodeless (IN) - Boiler sensor with ATC, 250 psi, K=10, 20ft.cable (BL)
E | Makeup conductivity (CT) - CPVC electrodeless (IN)
F | Flat pH (CT) - CCond, K=1.0, 100psi (IN)
G | High pressure pH (CT) - CCond, K=0.1, 100psi (IN)
H | Rod ORP (CT) - CCond, K=10, 100psi (IN)
I | Flat ORP (CT) - CCond, K=0.01, 100psi (IN)
J | High pressure ORP (CT) - CCond, K=1.0, 200psi (IN)
K | Chlorine** (CT) - CCond, K=0.1, 200psi (IN)
L | ClO2** (CT) - CCond, K=10, 200psi (IN)
M | Little Dipper** (CT) - CCond, K=0.01, 200psi (IN)
O | One Corrosion Sensor (electrodes purchased separately)** (CT)
P | Pyxis PTSA** (CT)
R | Two Corrosion Sensors (electrodes purchased separately)** (CT)
S | Disinfection, No Sensor (CT)
T | Pyxis Polymer** (CT)
U | Pyxis PTSA+Polymer** (CT)
x | Configurabe sensor

Sensor #2

Sensor #2
N | No sensor
B | 316SS/PP cooling tower contacting conductivity (CT) - Flat pH with ATC (IN) - Boiler sensor no ATC, 250 psi, K=1.0, 20ft.cable (BL)
C | Cooling tower, electrodeless conductivity (CT) - Disinfection, no sensor (IN) - Condensate sensor with ATC, 200 psi, K=0.1, 10ft.cable (BL)
D | High pressure conductivity (CT) - PEEK electrodeless (IN) - Boiler sensor with ATC, 250 psi, K=10, 20ft.cable (BL)
E | Makeup conductivity (CT) - CPVC electrodeless (IN)
F | Flat pH (CT) - CCond, K=1.0, 100psi (IN)
G | High pressure pH (CT) - CCond, K=0.1, 100psi (IN)
H | Rod ORP (CT) - CCond, K=10, 100psi (IN)
I | Flat ORP (CT) - CCond, K=0.01, 100psi (IN)
J | High pressure ORP (CT) - CCond, K=1.0, 200psi (IN)
K | Chlorine** (CT) - CCond, K=0.1, 200psi (IN)
L | ClO2** (CT) - CCond, K=10, 200psi (IN)
M | Little Dipper** (CT) - CCond, K=0.01, 200psi (IN)
O | One Corrosion Sensor (electrodes purchased separately)** (CT)
P | Pyxis PTSA** (CT)
R | Two Corrosion Sensors (electrodes purchased separately)** (CT)
S | Disinfection, No Sensor (CT)
T | Pyxis Polymer** (CT)
U | Pyxis PTSA+Polymer** (CT)
x | Configurabe sensor

Sensor #3

Sensor #3
N | No sensor
C | Cooling tower, electrodeless conductivity (CT) - Disinfection, no sensor (IN) - Condensate sensor with ATC, 200 psi, K=0.1, 10ft.cable (BL)
D | High pressure conductivity (CT) - PEEK electrodeless (IN) - Boiler sensor with ATC, 250 psi, K=10, 20ft.cable (BL)
E | Makeup conductivity (CT) - CPVC electrodeless (IN)
F | Flat pH (CT) - CCond, K=1.0, 100psi (IN)
G | High pressure pH (CT) - CCond, K=0.1, 100psi (IN)
H | Rod ORP (CT) - CCond, K=10, 100psi (IN)
I | Flat ORP (CT) - CCond, K=0.01, 100psi (IN)
J | High pressure ORP (CT) - CCond, K=1.0, 200psi (IN)
K | Chlorine** (CT) - CCond, K=0.1, 200psi (IN)
L | ClO2** (CT) - CCond, K=10, 200psi (IN)
M | Little Dipper** (CT) - CCond, K=0.01, 200psi (IN)
O | One Corrosion Sensor (electrodes purchased separately)** (CT)
P | Pyxis PTSA** (CT)
R | Two Corrosion Sensors (electrodes purchased separately)** (CT)
S | Disinfection, No Sensor (CT)
T | Pyxis Polymer** (CT)
U | Pyxis PTSA+Polymer** (CT)
x | Configurabe sensor

Sensor #4

Sensor #4
N | No sensor
D | High pressure conductivity (CT) - PEEK electrodeless (IN) - Boiler sensor with ATC, 250 psi, K=10, 20ft.cable (BL)
E | Makeup conductivity (CT) - CPVC electrodeless (IN)
F | Flat pH (CT) - CCond, K=1.0, 100psi (IN)
G | High pressure pH (CT) - CCond, K=0.1, 100psi (IN)
H | Rod ORP (CT) - CCond, K=10, 100psi (IN)
I | Flat ORP (CT) - CCond, K=0.01, 100psi (IN)
J | High pressure ORP (CT) - CCond, K=1.0, 200psi (IN)
K | Chlorine** (CT) - CCond, K=0.1, 200psi (IN)
L | ClO2** (CT) - CCond, K=10, 200psi (IN)
M | Little Dipper** (CT) - CCond, K=0.01, 200psi (IN)
O | One Corrosion Sensor (electrodes purchased separately)** (CT)
P | Pyxis PTSA** (CT)
R | Two Corrosion Sensors (electrodes purchased separately)** (CT)
S | Disinfection, No Sensor (CT)
T | Pyxis Polymer** (CT)
U | Pyxis PTSA+Polymer** (CT)
x | Configurabe sensor