Walchem WDP Series User manual

WPH/WDP Series
pH & ORP Controllers
Instruction Manual
Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA
TEL: [phone] FAX: [phone] WEB: www.walchem.com
W
PH/WDP pH/ORP Controllers
W A L C H E M
IWAKI America Inc.

Notice
© 2014 WALCHEM, Iwaki America Inc. (hereinafter “Walchem”)
5 Boynton Road, Holliston, MA 01746 USA
[phone]
All Rights Reserved
Printed in USA
Proprietary Material
The information and descriptions contained herein are the property of WALCHEM. Such information
and descriptions may not be copied or reproduced by any means, or disseminated or distributed without
the express prior written permission of WALCHEM, 5 Boynton Road, Holliston, MA 01746.
This document is for information purposes only and is subject to change without notice.
Statement of Limited Warranty
WALCHEM warrants equipment of its manufacture, and bearing its identification to be free from
defects in workmanship and material for a period of 24 months for electronics and 12 months for
mechanical parts and electrodes from date of delivery from the factory or authorized distributor under
normal use and service and otherwise when such equipment is used in accordance with instructions
furnished by WALCHEM and for the purposes disclosed in writing at the time of purchase, if any.
WALCHEM's liability under this warranty shall be limited to replacement or repair, F.O.B. Holliston,
MA U.S.A. of any defective equipment or part which, having been returned to WALCHEM,
transportation charges prepaid, has been inspected and determined by WALCHEM to be defective.
Replaceable elastomeric parts and glass components are expendable and are not covered by any
warranty.
THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, EITHER EXPRESS OR IMPLIED, AS
TO DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE
OR USE, OR ANY OTHER MATTER.
180362.M
April 2014

TABLE OF CONTENTS
1.0 INTRODUCTION........................................................................................................................1
2.0 SPECIFICATIONS.....................................................................................................................2
2.1 Measurement Performance...................................................................................................................2
2.2 Electrical: Input/Output ..........................................................................................................................2
2.3 Mechanical.............................................................................................................................................3
2.4 WPH/WDP Variables and their Limits....................................................................................................3
3.0 UNPACKING & INSTALLATION ..............................................................................................4
3.1 Unpacking the unit.................................................................................................................................4
3.2 Mounting the electronic enclosure.........................................................................................................4
3.3 Installation..............................................................................................................................................4
3.4 Icon Definitions ......................................................................................................................................5
3.5 Electrical installation ..............................................................................................................................7
4.0 FUNCTION OVERVIEW..........................................................................................................18
4.1 Front Panel ..........................................................................................................................................18
4.2 Display.................................................................................................................................................18
4.3 Keypad.................................................................................................................................................19
4.4 Access Code........................................................................................................................................19
4.5 Startup .................................................................................................................................................19
4.6 Shut Down ...........................................................................................................................................20
5.0 OPERATION............................................................................................................................20
5.1 Main Menu...........................................................................................................................................20
5.2 Sensor Menu........................................................................................................................................22
5.3 Temperature Menu (this menu does not appear if an ORP sensor has been selected).....................28
5.4 Control 1 - 4 Menus (FOR ON/OFF CONTROLLERS) .......................................................................29
5.5 Control 1 - 4 Menu (FOR PROPORTIONAL CONTROLLERS)..........................................................34
5.6 Interlock A Menu..................................................................................................................................36
5.7 4-20 mA 1 and 2 Menus (Optional)......................................................................................................37
5.8 Time Menu...........................................................................................................................................38
5.9 Access Code Menu..............................................................................................................................39
5.10 Datalog Menu.......................................................................................................................................40
5.11 Config Menu.........................................................................................................................................42
5.12 Upgrade Menu.....................................................................................................................................44
6.0 MAINTENANCE.......................................................................................................................45
6.1 Electrode Maintenance........................................................................................................................45
6.2 Replacing the Fuses............................................................................................................................46
7.0 TROUBLESHOOTING.............................................................................................................46
7.1 Error Messages....................................................................................................................................46
8.0 SERVICE POLICY...................................................................................................................48

1
1.0 INTRODUCTION
The Walchem WPH Series single sensor input and WDP Series dual sensor input controllers are wall
mount pH/ORP controllers that are available in on/off or modulated pulse proportional versions. They
are available with four on/off control relays (WPH410 or WDP410) with two modulated pulse
proportional output and two dry contact relays (WPH420 or WDP420) or four modulated pulse
proportional outputs (WDP440). A fifth output is used as a diagnostic alarm. One or two isolated 4-20
mA outputs are optional.
They are compatible with any amplified electrode. The choice of pH or ORP operation is selected
through the keypad. Use of Antimony pH electrodes is acceptable. Automatic temperature
compensation may be used via a Pt1000 or Pt100 input if pH operation is selected. The controller will
prompt you to calibrate the electrode at the desired frequency. Automatic buffer recognition may be
used in the calibration routine.
Our unique USB feature provides the ability to upgrade the software in the controller to the latest
version.
An advanced USB capability option is available. The Configuration file feature allows you to save all
the set points from a controller onto a USB flash disk, and then import them into another controller,
making the programming of multiple controllers fast and easy. The data logging feature allows you to
save the last 2 month’s readings and events to a USB flash disk.

2
2.0 SPECIFICATIONS
2.1 Measurement Performance
pH Range -2 to 16 pH units
pH Resolution 0.0015 pH units (0.01 pH displayed)
pH Accuracy (Calibrated): ± .01 pH
ORP Range -1500 to 1500 mV
ORP Resolution 92 µV (1mV displayed)
ORP Accuracy ±1 mV
Temp Comp (optional): 100 or 1000 ohm platinum RTD
Temperature Range 32-212°F (0-100°C)
Temperature Resolution ±0.09°F (0.05°C)
Temperature Accuracy ± 0.9°F (± 0.5°C)
2.2 Electrical: Input/Output
Input Power
100-240 VAC, 50/60 Hz, 8A Fuse: 1.0 ampere, 5 x 20 mm
Input Signals
pH/ORP ±1500 mV
Temp Comp (optional) Pt100 or Pt1000
Interlock (optional) Isolated, dry contact closure required (i.e., flow, level, etc.)
Outputs
Powered Relays Internally powered relays switching line voltage
6 A (resistive), 1/8 HP
All relays are fused together as one group, total current for this
group must not exceed 6A
Pulse Outputs Opto-isolated, Solid State Relay
150mA, 40 VDC Max.
VLOWMAX = .13V @ 18 mA
Dry contact relays 6 A (resistive), 1/8 HP
Dry contact relays are not fuse protected
CTRL 1 CTRL2 CTRL 3 CTRL 4 ALARM
WPH410 Powered Powered Dry Dry Dry
WPH420 Pulse Pulse Dry Dry Dry
WDP410 Powered Powered Powered Powered Powered
WDP420 Pulse Pulse Dry Dry Dry
WDP440 Pulse Pulse Pulse Pulse Dry
Note: The Alarm relay is non-programmable. Refer to the Main Menu diagram for the list of error
conditions that trigger the alarm relay.
4 - 20 mA 1 or 2 (optional) Internally powered
Fully isolated
600 Ohm max resistive load
Resolution .001% of span
Accuracy ± 1% of reading
pH/ORP Preamp Power ±5 VDC, 5 mA
Agency Approvals
Safety UL 61010-1:2012 3rd Ed.
CSA C22.2 No. 61010-1:2012 3rd Ed.
IEC 61010-1:2010 3rd Ed.
EN 61010-1:2010 3rd Ed.
EMC IEC 61326-1:2005
EN 61326-1:2006
Note: For EN61000-4-6, EN61000-4-3 the controller met performance criteria B.
*Class A equipment: Equipment suitable for use in establishments other than domestic, and those directly
connected to a low voltage (100-240 VAC) power supply network which supplies buildings used for
domestic purposes.

3
2.3 Mechanical Enclosure Material Polycarbonate
NEMA Rating NEMA 4X
Dimensions 8.5" x 6.5" x 5.5"
Display 2 x 16 character backlit liquid crystal
Operating Ambient Temp 32 – 122°F (0 – 50°C)
Storage Temperature -20 – 180°F (-29 – 80°C)
Flow switch manifold temperature rating 140°F (60°C) max
Flow switch manifold pressure rating 150 psi
Flow switch manifold connections ¾" NPTF
2.4 WPH/WDP Variables and their Limits
Low Limit High Limit
Sensor menu
Days Between Calibration 0 days (no reminder) 59 days
Temperature Menu No variables
Control 1 -4 Menus
High or Low Set Point -2 pH, -1500 mV 16 pH, 1500 mV
High or Low Alarm Point -2 pH, -1500 mV 16 pH, 1500 mV
Dead Band (Relay Outputs only) 0 pH, 0 mV 1.99 pH, 199 mV
Proportional Band 0 pH, 0 mV 6.99 pH, 999 mV
Minimum SPM Rate (Pulse Outputs only) 0 strokes/minute 99 strokes/min
Maximum SPM Rate (Pulse Outputs only) 10 strokes/minute 360 strokes/min
Sample Period (Relay Outputs only) 0:01 min:sec 30:00 min:sec
Time Limit (Relay Outputs only) 0:01 min:sec 499:59 min:sec (enabled)
0=unlimited (disabled)
Hold Time (Probe Wash) 0 seconds 99 seconds
On Time (Probe Wash) 1 second 99 seconds
4-20 mA 1 and 2 Menus 4 & 20 mA Settings -2 pH, -1500 mV 16 pH, 1500 mV
Access Code Menu New Value 0 9999
Datalog Menu (Optional) No variables
Config Menu (Optional) No variables
Upgrade Menu No variables
*Note: The Alarm relay is non-programmable. Refer to the Main Menu diagram for the list of error conditions
that trigger the alarm relay.

4
3.0 UNPACKING & INSTALLATION
3.1 Unpacking the unit
Inspect the contents of the carton. Please notify the carrier immediately if there are any signs of damage
to the controller or its parts. Contact your distributor if any of the parts are missing. The carton should
contain: a WPH/WDP series controller and instruction manual. Any options or accessories will be
incorporated as ordered.
3.2 Mounting the electronic enclosure
The WPH/WDP series controller is supplied with mounting holes on the enclosure. It should be wall
mounted with the display at eye level, on a vibration-free surface, utilizing all four mounting holes for
maximum stability. Use M6 (1/4" diameter) fasteners that are appropriate for the substrate material of
the wall. The enclosure is NEMA 4X rated. The maximum operating ambient temperature is 122°F
(50°C); this should be considered if installation is in a high temperature location. The enclosure requires
the following clearances:
Top: 2" (50 mm)
Left: 8" (203 mm)
Right: 4" (102 mm)
Bottom: 7" (178 mm)
3.3 Installation
Once the enclosure is mounted, the metering pumps or other control devices may be located at any
distance from the controller. The electrode, once amplified, may be placed up to 1000 feet from the
controller. Shielded cable with twisted pairs is required. Always route AC voltage wiring in conduit that
is separated by 6 inches from low voltage DC signal lines (such as the electrode signal).
Electrode Installation
The WPH/WDP controllers are designed to work with most AMPLIFIED pH, ORP or ISE electrodes.
When in doubt, follow the electrode manufacturer's instructions for installation.
If you have ordered your controller with an external preamplifier pre-wired to the controller, simply
attach the electrode to the BNC connector on the preamplifier. If you are using automatic temperature
compensation, wire the ATC element to the preamplifier as shown in figure 3.
If you have ordered the external preamplifier separately, see figure 3 for wiring instructions.
NOTE: The cable between the electrode and the preamplifier is carrying an extremely sensitive high
impedance voltage signal. Never cut, splice or otherwise destroy the integrity of the cable or unstable
readings and susceptibility to electrical noise will result.
Instructions for physically mounting the electrode into the process solution will vary greatly with the
type of electrode and circumstances involved in your application. Here are some general guidelines to
assist you. Refer to figure 1, Typical Installation.
The electrode should be installed such that the measuring surfaces will always stay wet. Many
electrodes have to be installed vertically, with the measuring surfaces pointing down. Follow the
manufacturer's recommendations if this is the case. If the electrode dries out, a slow response and short
life will result.

5
For submersion applications, mount the electrode below the minimum solution level. If the tank will be
completely emptied, plan on removing the electrode and storing it in tap water (NOT DI water) or pH 4
buffer solution while the tank is empty. If this is not desirable, a recirculation loop may be installed
with the electrode mounted in-line. The WEL electrode cable is not waterproof and must be protected
from moisture by connecting a pipe to the top of the electrode housing. The opposite end of the pipe
should also be protected from moisture using a cable gland. When submerging the electrode, make sure
the cable is protected by a length of pipe, sealed at the top using a cable gland.
For in-line applications, where the electrode is installed in a pipe, the electrode should be placed on the
discharge side of the pump (under positive pressure). A "U" trap should be included so that if flow
stops, the electrode is still immersed in the solution. If the flow through the pipe can not be shut down
for cleaning and calibrating the electrode, install the electrode in a by-pass line with isolation valves to
allow for electrode removal. The electrode should be installed in an area where there is good solution
movement and where it will respond rapidly to chemical additions. The placement of the electrode
relative to the placement of chemical replenishment, along with the quality of the mixing and
replenishment flow rate, is critical to accurate control.
IMPORTANT: To avoid cracking the female pipe threads on the supplied plumbing parts, use no more
than 3 wraps of Teflon tape and thread in the pipe FINGER tight plus 1/2 turn! Do not use pipe dope to
seal the threads of the flow switch because the clear plastic will crack!
3.4 Icon Definitions
Symbol Publication Description
IEC 417, No.5019 Protective Conductor Terminal
IEC 417, No. 5007 On (Supply)
IEC 417, No. 5008 Off (Supply)
ISO 3864, No. B.3.6 Caution, risk of electric shock
ISO 3864, No. B.3.1 Caution

6
Figure 1 Typical Installation
ACID
BASE
SUBMERSION
ELECTRODE
pH
PROBE
AC POWER
FLOW OUTFLOW IN
pH/ORP Controller
W A L C H E M
CIRCULATING
PUMP
SOLENOID
VALVE
COO
LIN
G
T
O
WER
WATER
METER
pH
Electrode
Flow
switch
pH/ORP Controller
W A L C H E M
pH
Electrode
Flow Switch
Installation with Submersion Electrode
Installation with In-line electrode

7
3.5 Electrical installation
The various standard wiring options are shown in figure 2. Your WPH/WDP series controller will arrive
from the factory prewired or ready for hardwiring. Depending on your configuration of controller
options, you may be required to hardwire some or all of the input/output devices. Refer to figures 3 and
4 for circuit board layout and wiring.
Note: when wiring the optional 4-20 mA output or a remote interlock switch, it is advisable to use
stranded, twisted, shield pair wire between 22-26 AWG. Shield should be terminated at the controller
ground stud (see figures 3 and 4).
CAUTION
1. There are live circuits inside the controller even when the power switch on the front panel is in
the OFF position! The front panel must never be opened before power to the controller is
REMOVED!
If your controller is prewired, it is supplied with a 8 foot, 18 AWG power cord with USA
style plug. A tool (#1 Phillips driver) is required to open the front panel.
2. When mounting the controller, make sure there is clear access to the disconnecting device!
3. The electrical installation of the controller must be done by trained personnel only and
conform to all applicable National, State and Local codes!
4. Proper grounding of this product is required. Any attempt to bypass the grounding will
compromise the safety of persons and property.
5. Operating this product in a manner not specified by Walchem may impair the protection
provided by the equipment.
Figure 2a WPH410 Conduit Wiring
POWER
C
TRL 2
CTRL 1
FLOW SWITCH
(OPTIONAL)
4-20mA #2
(OPTIONAL)
ALARM
CTRL 4
CTRL 3
4-20mA #1
(OPTIONAL
)
PLUG pH/ORP
SENSOR

8
POWER
CTRL 2
CTRL 1
pH/ORP 2
FLOW SWITCH 2
ALARM
CTRL 4
CTRL 3
pH/ORP
1
FLOW
SWITCH 1
4-20mA 1
4-20mA 2
POWER CTRL 2 CTRL 1 pH/ORP 2
FLOW SWITCH 2
ALARM
CTRL 4
CTRL 3
pH/ORP
1
FLOW
SWITCH 1
4-20mA 1
4-20mA 2
PLUG
Figure 2b WPH420 Conduit Wiring
POWER
CTRL 4
CTRL 3
FLOW SWITCH
(OPTIONAL)
CTRL 1
CTRL 2
pH/ORP
SENSOR
PLUG ALARM
4-20mA #1
(OPTIONAL) 4-20mA #2
(OPTIONAL)
Figure 2c WDP410 Conduit Wiring
Figure 2d WDP420 Conduit Wiring

9
POWER CTRL 2 CTRL 1 pH/ORP 2
FL
O
W
S
WIT
C
H 2
ALARM
C
TRL 4
CTRL 3
pH/ORP 1
FLOW
SWITCH 1
4-20mA 1
4-20mA 2
PLUG
Figure 2e WDP440 Conduit Wiring

10
Figure 3a WPH Inputs using WEL pH/ORP Electrode Housings
Power Supply
(115 VAC or 230 VAC)
Contact Closure:
Polarity not critical
Interlock Function
+5V
T-T+
GRN/WHT
WHITE/GRN
GROUND
STUD
SHIELD
L1 L2/N
GRN 120V
GRN/YEL240V
WHT 120V
BLU 240V
BLK120V
BRN240V
IN+ IN- +5V -5V
-5VIN+ IN-
ORN/WHT
WHITE/ORN
BLU/WHT
WHITE/BLU
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
WEL Electrode
Diffamp Housing
(102581, 102606,
102582,102607,
102758, 102759) pH/ORP electrode
cartridge
L1 L2/N
L2 L2 L2 L2 L2 L2
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
Dashed lines indicate
optional temperature
compensation

11
Figure 3b WPH Inputs using pH/ORP Electrode/External Preamplifiers
Power Supply
(115 VAC or 230 VAC)
Contact Closure:
Polarity not critical
Interlock Function
+5V
T-T+
GROUND
STUD
L1 L2/N
GRN120V
GRN/YEL240V
WHT 120V
BLU 240V
BLK120V
BRN240V
IN+ IN- +5V -5V
-5VIN+ IN-
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
OPTIONAL TEMPERATURE
COMPENSATION (pH ONLY)
GROUND
EXTERNAL
PREAMPLIFIER
(190783)
to ground
L1 L2/N
L2 L2 L2 L2 L2 L2
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.

12
Figure 3c WDP Inputs using WEL pH/ORP Electrode Housings
Power Supply
(115 VAC or 230 VAC)
GROUND
STUD
L1 L2/N
GRN120V
GRN/YEL 240V
WHT 120V
BLU 240V
BLK120V
BRN240V
+5V
T-T+
GRN/WHT
WHITE/GRN
SHIELD
-5VIN+ IN-
ORN/WHT
WHITE/ORN
BLU/WHT
WHITE/BLU
WEL Electrode
Diffamp Housing
(102581, 102606,
102582,102607,
102758, 102759) pH/ORP electrode
cartridge
L1 L2/N
L2 L2 L2 L2 L2 L2
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
IN+ IN- +5V -5V
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
IN+ IN- +5V -5V
Contact Closure:
Polarity not critical
Interlock Function
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
+5V
T-T+
GRN/WHT
WHITE/GRN
SHIELD
-5VIN+ IN-
ORN/WHT
WHITE/ORN
BLU/WHT
WHITE/BLU
WEL Electrode
Diffamp Housing
(102581, 102606,
102582,102607,
102758, 102759) pH/ORP electrode
cartridge
SYSTEM A
SYSTEM B
TO GRND
SYSTEM A
SYSTEM B
Dashed lines indicate
optional temperature
compensation
Dashed lines indicate
optional temperature
compensation

13
Figure 3d WDP Inputs using pH/ORP Electrode/External Preamplifiers
Power Supply
(
115 VAC or 230 VAC
)
Contact Closure:
Polarity not critical
Interlock Function
GROUND
STUD
L1 L2/N
GRN 120V
GRN/YEL240V
WHT 120V
BLU 240V
BLK120V
BRN240V
IN+ IN- +5V -5V
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
L1 L2/N
L2 L2 L2 L2 L2 L2
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
SYSTEM A
SYSTEM A
Contact Closure:
Polarity not critical
Interlock Function
SYSTEM B
IN+ IN- +5V -5V
SYSTEM B
+5V
T-T+
-5VIN+ IN-
OPTIONALTEMPERATURE
COMPENSATION (pH ONLY)
GROUND
EXTERNAL
PREAMPLIFIER
(190783)
to ground
+5V
T-T+
-5VIN+ IN-
OPTIONALTEMPERATURE
COMPENSATION (pH ONLY)
GROUND
EXTERNAL
PREAMPLIFIER
(190783)
to ground

14
Figure 4a WPH410 Outputs
Pump
Solenoid/
Motorized Ball Valve
Alarm
L1 L2/N
L2 L2 L2 L2 L2 L2
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
L2/N L2/N CTRL 1
N.C. N.O. COM.
CTRL 3
N.O.N.C.
CTRL 2 COM CTRL 4
N.O. COM N.O. N.O. ALARM COM N.O.
GROUND
STUD
WHT 120V BLU 240V
GRN 120V
GRN/YEL 240V
IF MOTORIZED
BALL VALVE
BLK 120V BRN 240V
Chart
Recorder
WHT 120V BLU 240V
GRN 120V
GRN/YEL 240V
TO GROUND
STUD
IN+ IN- +5V -5V
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
F1
F2
(WPH410 only)
PLC
BLK 120V BRN 240V
GRN 120V
G
RN
/
YEL 24
0
V
WHT 120V
BLU 240V
FUSED
EXTERNAL
POWER
SOURCE
GRN 120V
GRN/YEL 240V
WHT 120V BLU 240V
BLK 120V BRN 24
0
V
FUSED EXTERNAL
POWER SOURCE
Note: CTR3, CTRL 4 andAlarm are dry
contact relays (polarity not critical).
NOTE: When connecting a
motorized ball valve, the pre-wired
pigtail must be removed and the
valve requires two wires, one to
N.O. to open the valve and one to
N.C. to close the valve.

15
Figure 4b WPH/WDP420 Outputs
Pump(s)
Alarm
L1 L2/N
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
CTRL 1
+ -
N.C.
CTRL 3
-+
CTRL 2 COM CTRL 4
N.O. COM N.O. N.O. ALARM COM N.O.
GROUND
STUD
Chart
Recorder
IN+ IN- +5V -5V
IN-
DIG IN 2 DIG IN 3
IN+ IN-
DIG IN 1
IN+
IN-
IN+
DIG IN 4
IN+ IN-
DIG IN 5
IN+ IN-
F1
PLC
BLK 120V BRN 240V
GRN 120V
G
RN
/
YEL 24
0
V
WHT 120V
BLU 240V
FUSED
EXTERNAL
POWER
SOURCE
GRN 120V
GRN/YEL 240V
WHT 120V BLU 240V
BLK 120V BRN 24
0
V
FUSED EXTERNAL
POWER SOURCE
Note: CTRL 3, CTRL 4 and Alarm are dry
contact relays (polarity not critical).
Note: TheAlarm relay is not programmable.
Refer to the Main Menu diagram for the list of
error conditions that trigger the Alarm relay.
EXTERNAL
AC POWER EXTERNAL AC POWER
Note: Wire “COM” terminal of the external
control input of the pump to the “negative”
terminal of the controller.

16
Figure 4c WDP410 Outputs
Pump
Alarm
L1 L2/N
L2 L2 L2 L2 L2 L2
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
L2/N L2/N L2/N L2/N L2/N L2/N CTRL 1
N.C. N.O.
CTRL 3CTRL 2 CTRL 4 ALARM
N.C. N.O.
GROUND
STUD
F1
BLK120V
BRN240V
+5V
BLKRED
COND
T-T+
Chart
Recorder Chart Recorder
IN-
FLOW MTR 1 FLOW MTR 2
IN+
FLOW SW 1
IN+
IN-IN+
FLOW SW 2
IN-IN+
+5V
BLKRED
COND
T-T+
GRN 120V
GRN/YEL 240V
WHT 120V BLU 240V
N.C. N.O. N.C. N.O. N.C. N.O.
Pum
p
SOLENOID/MOTORIZED
BALL VALVE SOLENOID/
MOTORIZED
BALL VALVE
IF MOTORIZED
BALL VALVE
WHT 120V BLU 240V WHT 120V BLU 240V WHT 120V BLU 240V
GRN 120V
GRN/YEL 240V
BLK120V
BRN240V
BLK120V
BRN240V
BLK120V
BRN240V
BLK120V
BRN240V
GRN 120V
GRN/YEL 240V
TO GROUND
STUD
GRN 120V
GRN/YEL 240V
TO GROUND
STUD
GRN 120V
GRN/YEL 240V
TO GROUND
STUD
NOTE: When connecting a
motorized ball valve, the pre-wired
pigtail must be removed and the
valve requires two wires, one to
N.O. to open the valve and one to
N.C. to close the valve.

17
Figure 4d WDP440 Outputs
Pump(s)
Alarm
L1 L2/N
BLEED
N.C. N.O. N.C.
BOI 1
N.O.N.C.FEED N.C. BIO 2
N.O. N.C. N.O. N.O. ALARM N.C. N.O.
CTRL 1
+ -
N.C.
CTRL 3
-+
CTRL 2 CTRL 4 N.O. ALARM
COM N.O.
GROUND
STUD
F1
GRN 120V
GRN/YEL 240V
WHT 120V BLU 240V
BLK 120V BRN 24
0
V
FUSED EXTERNAL
POWER SOURCE
Note: Alarm is a dry contact relay
(polarity not critical).
Note: The Alarm relay is not programmable.
Refer to the Main Menu diagram for the list of
error conditions that trigger the Alarm relay.
EXTERNAL
A
C
P
O
WER EXTERNAL A
C
P
O
WER
Note: Wire “COM” terminal of the external
control input of the pump to the “negative”
terminal of the controller.
+5V
BLKRED
COND
T-T+
Chart
Recorder Chart Recorder
IN-
FLOW MTR 1 FLOW MTR 2
IN+
FLOW SW 1
IN+
IN-IN+
FLOW SW 2
IN-IN+
+5V
BLKRED
COND
T-T+
EXTERNAL
AC POWER EXTERNAL
AC POWER
-+-+