Graco 15H876 User Manual

Instructions

15H876 Pressure
Transducer Kit

To replace pressure transducer on E-Flo® Electric Circulation Pumps.
For professional use only.

Important Safety Instructions

Read all warnings and instructions in this manual
and in E-Flo Repair-Parts manual 311594. Save
these instructions.

311600C

ENG

Kit also includes circuit board and label.

ti8721a

Pressure Relief Procedure

Pressure Relief
Procedure

System pressure can cause the pump to cycle unex­pectedly, which could result in serious injury from
splashing or moving parts.

1. Set START/STOP switch to STOP.

2. Push in SECURE DISABLE switch.

3. Open the back pressure regulator and all fluid drain
valves in the system, having a waste container
ready to catch drainage. Leave open until you are
ready to pressurize system again.

4. Check that pressure gauges on fluid supply and
return lines read zero. If gauges do not read zero,
determine cause and carefully relieve pressure by
VERY SLOWLY loosening a fitting. Clear obstruc­tion before pressurizing system again.

Kit Installation

1. Jog the motor to bring the stand side lower to the
bottom of its stroke.

2. Relieve pressure, page 2.

3. Shut off electrical power to the unit.

4. See F

IG. 1. Remove two screws (12) and the cover

(A).

12*

A

Kit Parts

NOTE: Pressure Transducer Kit 15H876 includes parts

to replace the pressure transducer. Parts included in the
kit are marked with an asterisk, for example (12*). Use
all the new parts in the kit.

Ref.
No. Part No. Description Qty

12* 116719 SCREW, 8-32 hex washer head
25a* n/a PRESSURE TRANSDUCER
25c* n/a CIRCUIT BOARD
33* n/a GASKET, circuit board
36* n/a LABEL, calibration
41* 111316 O-RING; chemically resistant fluo-

roelastomer

58* n/a SPACER; brass

Parts designated n/a are not available separately.

12

1
1
1

FIG. 1. Remove Cover

1
1

1

12*

ti8317b

2 311600C

Kit Installation

5. See FIG. 2. Remove six screws (12), the circuit
board cover (B), and the gasket (33).

6. Disconnect the transducer cable (25a) from J1 on
the circuit board (25c). See the Electrical Schematic
in the E-Flo Repair-Parts Manual 311594.

7. Disconnect the TDC cable (C) from J2 on the circuit
board (25c).

12*

36*

B33*25c*

ti8725a

8. Disconnect the IS circuit field wire from J2 and J3.

9. Remove four screws (12) and the circuit board
(25c).

10. Install the new circuit board (25c*) using four screws
(12*).

25c*

C

25a*

F

IG. 2. Circuit Board

311600C 3

Pressure Sensor Calibration Information

11. See FIG. 3. At the pump outlet manifold (D), loosen
the transducer nut (E) and unscrew the adapter (F)
from the manifold. Remove the transducer (25a)
from the manifold port and pull its cable out of the
conduit (G). Remove the existing o-rings (41, 58)
and discard.

12. Install one new black o-ring (41*) and the new brass
spacer (58*) on the new transducer (25a*).

7

Torque to 15-20 ft-lb (21-27 N•m).

E

7

G

58*

F

7

25a*

*41

D

ti8721a

Pressure Sensor
Calibration Information

Pressure sensor information (Pr 20.34, 20.35, and

20.36) for your system must be keyed into the Vari­able Frequency Drive before system start-up.

To prevent accidental change of pressure sensor cali­bration parameters, they are locked by Pr 20.16. To
enter calibration parameters, perform the following
steps:

a. Set Pr 20.16 to 777, to unlock pressure sensor

parameters.

b. Enter calibration parameters Pr 20.34, 20.35,

and 20.36.

c. Set Pr 20.16 to 0 to lock pressure sensor

parameters.

Calibration Parameters from the label:

F

IG. 3. Pressure Transducer

13. Thread the transducer’s cable (25a*) through the
adapter (F) and conduit (G). Reconnect the cable to
J1 on the circuit board (25c*). See F

IG. 2.

14. Insert the transducer into the outlet manifold (D).
Torque the adapter (F) first, then the nut (E) to 15-20
ft-lb (21-27 N•m).

15. See F

IG. 2. Connect the TDC cable (C) to J2 on the

circuit board (25c*).

16. Connect the IS circuit field wire to J2 and J3. See
the Electrical Schematic in the E-Flo Repair-Parts
Manual 311594.

17. Install the new gasket (33*), the circuit board cover
(B), and six screws (12*).

18. Remove the old label from the circuit board cover
(B). Attach the new label (36*) to the cover.

19. Enter calibration information found on the new label
(36*) into the VFD. See page Pressure Transducer
Calibration Procedure.

Pr 20.34 – Zero Calibration

Pr 20.35 – Calibration Pressure

Pr 20.36 – High Calibration

20. See F

IG. 1. Reinstall the cover (A) with two screws

(12*).

4 311600C

Pressure Transducer Calibration Procedure

Pressure Transducer Calibration Procedure

E-Flo pressure sensor must be calibrated against an
instrument grade High Precision Pressure Transducer,
which should be installed near the E-Flo pressure sen­sor.

1. Ensure that the High Precision Pressure Transducer
calibration is up to date.

2. Set Pr 20.16 to 777, to unlock pressure sensor
parameters.

3. Calibrate Low Pressure Point as follows:

a. Ensure that system is not pressurized. Calibra-

tion instrument pressure reading should be 0
psi.

b. Use Keypad to navigate to Pr 20.33; monitor its

reading for 5 – 10 seconds to determine its
average value. Make a record of it.

c. Navigate to Pr 20.34 and enter the recorded

average value of Pr 20.33.

4. Calibrate the High Pressure Point as follows:

a. Pressurize the system to 250 – 275 psi.

b. Keep the system pressurized and ensure that

pressure does not fluctuate.

c. Take a pressure reading from the calibration

instrument and make a record of it.

d. Navigate to Pr 20.35 and enter the recorded

system pressure.

e. Navigate to Pr 20.33; monitor its reading for

5-10 seconds to determine its average value.
Make a record of it.

f. Navigate to Pr 20.36 and enter the recorded

value of Pr 20.33.

5. Set Pr 20.16 to 0 to lock pressure sensor parame-

ters.

6. Verify pressure calibration.

a. Relieve system pressure.

b. Navigate to Pr 20.31 and verify that its reading

is within the range of 0-3 psi.

c. Pressurize the system to about 100 psi. Verify

that reading of Pr 20.31 is within +/- 2.5 psi of
the system pressure.

Do not exceed pressure rating of the system! If system
is rated to a pressure lower then 250 psi, use maxi­mum allowable rated pressure. Refer to Operation
Manual 311593.

d. Pressurize system to about 250 psi. Verify that

reading of Pr 20.31 is within +/- 2.5 psi of the
system pressure.

311600C 5

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

For the latest information about Graco products, visit www.graco.com.
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]

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 311600

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GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441

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www.graco.com

Revised 09/2010