Graco 17Z666 Operation manual

3A6976C
EN
Instructions — Parts
Leak Detection
System
For detecting leaks in your pump diaphragm system. For professional use only.
Not approved for use in explosive atmospheres or hazardous locations unless otherwise
specified.
Part No. 17Z666 Leak Sensor Kit
Part No. 17Z667 Leak Sensor Kit
includes ATEX-certified leak sensor
Part No. 25P303 Control Box Kit
Part No. 25P305 Control Box Mounting Kit
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment.
Save these instructions.

Contents
2 3A6976C
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Component Identification and Description . . . . . . 5
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ATEX-Certified Leak Sensor Kit 17Z667 . . . . . . . 6
Leak Sensor Kit 17Z666 . . . . . . . . . . . . . . . . . . . 7
Connect Power to Control Box . . . . . . . . . . . . . . 9
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Clean Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Leak Sensor Kit 17Z666. . . . . . . . . . . . . . . . . . . 10
ATEX Leak Sensor 17Z667 . . . . . . . . . . . . . . . . 10
Control Box Kit 25P303 . . . . . . . . . . . . . . . . . . . 10
Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 12
Graco Information. . . . . . . . . . . . . . . . . . . . . . . . . . 12

Warnings
3A6976C 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks.
When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings.
Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this
manual where applicable.
WARNING
ELECTRIC SHOCK HAZARD
Improper setup or usage of the system can cause electric shock.
•Turn off and disconnect power cord before servicing equipment.
•Do not expose to rain. Store indoors.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or
solvent flowing through the equipment can cause static sparking. To help prevent fire and explosion:
• Use equipment only in well-ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop
cloths (potential static sparking).
• Ground all equipment in the work area. See Grounding instructions.
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Use only grounded hoses.
•Stopoperation immediately if staticsparkingoccursoryoufeelashock.Donot useequipmentuntil
you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
• Route exhaust away from all ignition sources. If diaphragm ruptures, fluid may be exhausted with air.
FIRE AND EXPLOSION HAZARD
Static charge may build up on plastic parts during cleaning and could discharge and ignite flammable
vapors. To help prevent fire and explosion:
• Clean plastic parts only in well-ventilated area.
• Do not clean with a dry cloth.
• Do not operate electrostatic guns in equipment work area.

Warnings
4 3A6976C
Approvals
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
•Do not operate the unit when fatigued or under the influence of drugs or alcohol.
•Donot exceedthemaximumworking pressureortemperaturerating ofthelowest rated systemcomponent.See
Technical Specifications in all equipment manuals.
•Use fluids and solvents that are compatible with equipment wetted parts. See Technical Specifications in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your
material, request Safety Data Sheets (SDSs) from distributor or retailer.
•Do not leave the work area while equipment is energized or under pressure.
•Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
•Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s
replacement parts only.
•Do not alter or modify equipment. Alterations or modifications may void agency approvals and create safety
hazards.
•Make sure all equipment is rated and approved for the environment in which you are using it.
•Use equipment only for its intended purpose. Call your distributor for information.
•Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
•Do not kink or over bend hoses or use hoses to pull equipment.
•Keep children and animals away from work area.
•Comply with all applicable safety regulations.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
•Protective eyewear, and hearing protection.
•Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
FIRE AND EXPLOSION HAZARD
Do not use ATEX kit 17Z667 (17Z051 sensors) with
control box kit 25P303. The control box is not
approved for explosive atmospheres or hazardous
locations and could result in injury.
Part No. Description Approvals
25P303 Control box kit
17Z664 Sensor (included in kit 17Z666)
17Z051 ATEX-certified sensor (included in kit 17Z667)
WARNING
II 2 G
Ex ib IIB T6 Gb

Overview
3A6976C 5
Overview
Usage
The leak detection system monitors air operated double
diaphragm pumps for diaphragm rupture or other leaks
that may contaminate the fluid being pumped. The sys-
tem is made up of a main control box and two liquid
detection sensors. The sensors are screwed into the air
side of each diaphragm on the pump. Each sensor cor-
responds to a green LED indicator on the control box.
When a sensor detects liquid, the corresponding green
LED indicator will extinguish and the red FAULT LED
indicator will light, indicating a diaphragm rupture or
other leak has occurred. The control box also has the
ability to control an external device such as an alarm,
light, or air solenoid via an onboard relay.
During normal operation, the green LED indicators on
the control box will remain lit. The red FAULT LED
indicator will remain extinguished, indicating proper
operation.
Component Identification and
Description
Before you install the system, you should be familiar
with the parts discussed in the following paragraphs.
Sensors
The sensors are mounted on the pump to detect liquid
on the air side of each diaphragm. See FIG. 1 and FIG. 5.
NOTE: Leak sensor kit 17Z667 is ATEX certified and
should not be used with control box kit 25P303. Control
box kit 25P303 is not rated for use in hazardous
locations.
Control Box
The control box powers and continuously monitors the
sensors. It will display a fault condition by lighting the
red FAULT LED indicator when a diaphragm rupture or
other leak is detected. The FAULT LED indicator will
remain lit until the reset button is pressed.
Relay
The relay has two sets of contacts that can be used to
indicate an error by activating an output signal, such as
turning off a valve, lighting a light, etc. The contacts are
located on the CR3 terminal strip. See FIG. 6.
Grounding
Follow the instructions in your pump manual to ground
the diaphragm pump system and check its electrical
grounding continuity.
The control box does not require electrical grounding.

Installation
6 3A6976C
Installation
ATEX-Certified Leak Sensor Kit
17Z667
For use with a customer-supplied, ATEX-certified
monitoring device.
1. To install the sensors, first disconnect power to your
monitoring device.
2. Relieve pump pressure. Follow the Pressure Relief
Procedure in your pump manual.
3. Remove plugs from the pump air covers, if plugs are
present. See FIG. 2.
FIG. 1. Typical Leak Detection System
Control Box
Sensors
Electric Shock
To avoid potential injury from electric shock, shut off power
to your monitoring device before installing the sensors or
servicing the leak detector system.
Pressure Relief
Your diaphragm pump stays pressurized until pressure is
relieved manually. To help prevent serious injury from
pressurized fluid, such as splashing in the eyes or on skin,
follow the Pressure Relief Procedure when you stop
pumping and before you install the leak detector sensors.
Refer to your pump manual for the correct Pressure Relief
Procedure.
Fire and Explosion Hazard
Do not use ATEX kit 17Z667 (17Z051 sensors) with control
box kit 25P303. The control box is not approved for
explosive atmospheres or hazardous locations and could
result in injury. FIG. 2. Air Cover Plugs on Typical Pump

Installation
3A6976C 7
4. Assemble the sensor.
a. Slip the o-ring (3) onto the sensor (1). See FIG.
3.
b. Screw the sensor bushing (2) onto the sensor
(1). See FIG. 3.
5. Screw the sensor assembly into the pump. Use
thread sealant as needed.
6. Connect the sensors to your monitoring device
according to your device’s instructions. See FIG. 4
for sensor wiring connections. See Technical Data
for electrical specifications.
Leak Sensor Kit 17Z666
1. To install the sensors, first disconnect power to the
control box.
2. Relieve pump pressure. Follow the Pressure Relief
Procedure in your pump manual.
3. Mount the leak detector control box in a convenient
location.
4. Remove plugs from the pump air covers, if plugs are
present. See FIG. 2.
5. Screw the sensors into the pump. Use thread
sealant, as needed. See FIG. 5.
FIG. 3. ATEX-Certified Sensor Assembly
FIG. 4. Sensor Wiring Connections
1
2
3
Electric Shock
To avoid potential injury from electric shock, shut off
power to the control box before installing the sensors
or servicing the leak detector system.
Pressure Relief
Your diaphragm pump stays pressurized until
pressure is relieved manually. To help prevent
serious injury from pressurized fluid, such as
splashing in the eyes or on skin, follow the Pressure
Relief Procedure when you stop pumping and before
you install the leak detector sensors. Refer to your
pump manual for the correct Pressure Relief
Procedure.
FIG. 5. Typical Control Box and Sensor Installation
Control Box
Sensors

Installation
8 3A6976C
6. On the control box, unscrew four screws (C) and
remove the cover (D). See FIG. 6.
7. Route the sensor wires into the control box through
the fittings (F) at the bottom of the box.
8. Connect Sensor 1 to the control box by attaching
the lead wires from the sensor to the control box as
follows:
a. Attach the supply wire (brown) to either of the
terminals marked PWR.
b. Attach the ground wire (blue) to one of the ter-
minals marked COM.
c. Attach the output wire (black) to the terminal
marked A1 on terminal strip CR1.
9. Connect Sensor 2 to the control box by attaching
the lead wires from the sensor to the sensor termi-
nals as follows:
a. Attach the supply wire (brown) to either of the
terminals marked PWR.
b. Attach the ground wire (blue) to one of the ter-
minals marked COM.
c. Attach the output wire (black) to the terminal
marked A1 on terminal strip CR2.
10. Tighten the fittings (F) after attaching the sensor
lead wires.
NOTE: If the power connections will be made next,
skip the next step.
11. Reinstall the cover (D) using the four screws (C).
FIG. 6. Sensor Wire Connections in Control Box
FAULT RESET
SENSOR 1 OK SENSOR 2 OK
PWR OUT S1 S2
PS1 PWR PWR CR1 CR2 CR3 CR4 SIG SIG COM COM COM
LN AB
D
C
F
ti36860a
DETAIL

Operation
3A6976C 9
Connect Power to Control Box
The control box can be powered by 110 VAC or 240
VAC. AC power is connected to power supply PS1. See
FIG. 6.
1. If the cover has not already been removed for
sensor installation, unscrew four screws (C) and
remove the cover (D) from the control box. See FIG.
6.
2. Connect the line wire from your power source to
terminal L and the neutral wire to terminal N, labeled
on the power supply PS1. See FIG. 6.
NOTE: The power cord from your power source
may include a ground wire. The ground wire from
your power cord is not needed and should remain
unused. Clip off the unused ground wire.
3. Connect an external alarm, air valve, etc. to the
internal relay, if desired. The leak sensors can be
wired normally open (NO) or normally closed (NC).
See Technical Data for electrical specifications.
To wire the leak sensors NO, connect the output
signal wires to pins 11 and 14 on the CR3 terminal
strip. See FIG. 6.
To wire the leak sensors NC, connect the output
signal wires to pins 11 and 12 on the CR3 terminal
strip. See FIG. 6.
4. Reinstall the cover using the four screws.
Operation
During normal operation, the two green LED indicators
on the control box will be lit.
If an error or a diaphragm rupture or other leak occurs,
the green LED indicator corresponding to the sensor
that identified the leak will extinguish. The red FAULT
LED indicator will light. The relay will trip and change
state.
To clear the faulted state, press the reset button. See
FIG. 6. The relay will remain in faulted state until the
reset button is pressed. The green LED indicators will
relight if the corresponding sensors no longer detect liq-
uid.
Maintenance
Clean Sensors
Clean the sensors whenever the pump is disassembled
for cleaning or inspection.
NOTE: Always disconnect the power supply from the
control box or monitoring device prior to cleaning the
pump.
Test to ensure proper operation
1. Verify non-fault condition. With power to the control
box, verify that:
• the green LED indicators are lit
• the red FAULT LED indicator is extinguished
2. Verify operation of each sensor. Submerge each
sensor separately in the fluid being pumped. Verify
that:
• the green LED indicators are extinguished
• the red FAULT LED indicator is lit
3. Verify loss-of-power condition. Disconnect the
power supply from the control box. Verify that:
• the relay is set and performs the intended oper-
ation (i.e. shuts down the pump)
• all LED indicators are extinguished
All electrical wiring must be done by a qualified
electrician and comply with all local codes and
regulations.

Parts
10 3A6976C
Parts
Leak Sensor Kit 17Z666
ATEX Leak Sensor 17Z667
Control Box Kit 25P303
Control Box Mounting Kit
25P305
Ref.
No Part. No Description Qty.
1114475 BUSHING, pipe 2
217Z664 SENSOR, 3A 2
Ref.
No Part. No Description Qty.
1‡17Z051 SENSOR 2
217Z052 BUSHING 2
3 107186 PACKING, O-RING 2
‡This model is certified:
II 2 G
Ex ib IIB T6 Gb
Ref.
No Part. No Description Qty.
1 18A529 LEAK DETECTOR BOX 1
2*15G303 LABEL, warning 1
* Replacement warning labels, signs, tags, and cards
are available at no cost.
Ref.
No Part. No Description Qty.
1 109478 HEX NUT, stainless steel 2
2 111833 WASHER, flat 2
3 122664 WASHER, back-up 4
4 15H972 GASKET, 3A 1
5 18A791 BRACKET 1
6 18A874 NUT, 6-32, nylon lock 4
7 18A875 SCREW, 6-32, pan head 4
8 15H966 SCREW, hex head 2

Technical Data
3A6976C 11
Technical Data
California Proposition 65
Control Box Kit 25P303
Input voltage range 100–240 VAC (50/60 Hz)
Full-load amperes 0.3 A
Maximum output relay voltage 60 V
Maximum output relay current 0.3 A
Output relay wire gage (stranded copper wire) 24–16 AWG (0.14–1.5 mm2)
Leak Sensor Kit 17Z666
Maximum sensor pressure 100 psi (0.69 MPa, 6.9 bar)
Maximum sensor operating temperature 257°F (125°C)
Rated operational voltage 4.5–15.4 VDC
Leak Sensor Kit 17Z667
Maximum sensor pressure 125 psi (0.86 MPa, 8.6 bar)
Maximum sensor operating temperature 104°F (40°C)
Rated operational voltage 10–16.8 VDC
Rated operational current < 50 mA
No-load supply current < 12 mA
Type of liquids that can be detected by leak sensor kits 17Z666 and 17Z667: water, oil, or any liquid compatible with
polysulphone.
CALIFORNIA RESIDENTS
WARNING: Cancer and reproductive harm – www.P65warnings.ca.gov.

All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 3A6976
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2018, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
www.graco.com
Revision C, March 2021
Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from
defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special,
extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace
any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed,
operated and maintained in accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused
by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering,
or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the
incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper
design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materials not supplied by
Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor
for verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts.
The equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose
any defect in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts,
labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR
PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no
other remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or
property, or any other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within
two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS
SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors,
switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable
assistance in making any claim for breach of these warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying
equipment hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach
of contract, breach of warranty, the negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal
proceedings entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les
parties reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et
procédures judiciaires exécutés, donnés ou intentés, à la suite de ou en rapport, directement ou indirectement, avec les
procédures concernées.
Graco Information
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: [phone] or Toll Free: 1-800-328-0211 Fax: [phone]