Acorn ST70 User Manual
ACORN ENGINEERING COMPANY
P.O. BOX 3527
CITY OF INDUSTRY, CA 91744
UNITED STATES OF AMERICA
WWW.ACORNENG.COM
Patent Pending
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
ST70 LAVATORY TEMPERING VALVE
Models ST70-38 / ST70CP-12
FOR TECHNICAL ASSISTANCE
1.800.743.8259
fieldservice@acorneng.com
Federal
Public Law
111-380
(No Lead)
NOTES TO THE INSTALLER:
1. Please leave this documentation with the owner of the fixture when finished.
2. Please read this entire booklet before beginning the installation.
3. Check your installation for compliance with plumbing and other applicable codes.
LIMITED WARRANTY
UNITED STATES AND CANADA
Acorn Controls warrants that its products are free from defects in material or workmanship under normal use and
service for a period of one year from date of shipment. Acorn's liability under this warranty shall be discharged solely
by replacement of repair of defective material, provided Acorn is notified in writing within one year from date of
shipment, F.O.B. Industry, California.
This warranty does not cover installation or labor charges and does not apply to materials, which have been
damaged by other causes such as mishandling or improper care or abnormal use. The repair or replacement of the
defective materials shall constitute the sole remedy of the Buyer and the sole remedy of Acorn under this warranty.
Acorn shall not be liable under any circumstances for incidental, consequential or direct charges caused by defects in
materials, or any delay in the repair or replacement thereof. This warranty is in lieu of all other warranties expressed
or implied. Product maintenance instructions are issued with each unit and disregard or non-compliance with these
instructions will constitute an abnormal use condition and void the warranty.
Acorn Controls Division of Acorn Engineering Company®, A member of Morris Group International™
Date: 04/01/14Manual #7802-112-001
ST70 Installation & Operation Manual
WARNING:
!
You are required to thoroughly read all installation
instructions and product safety information before
beginning the installation of this product.
FAILURE TO READ AND FOLLOW PROPER
INSTALLATION AND MAINTENANCE
INSTRUCTIONS MAY RESULT IN PRODUCT
FAILURE WHICH CAN CAUSE PROPERTY
DAMAGE, PERSONAL INJURY AND/OR
DEATH.
Acorn Controls is not responsible for damages
resulting from improper installation and/or
maintenance. Installation of this valve shall be
done in accordance with Uniform Plumbing
Code.
TO ENSURE ACCURATE AND RELIABLE
OPERATION OF THIS PRODUCT, IT IS
ESSENTIAL TO:
Ÿ Properly design the system to minimize
pressure and temperature variations.
Ÿ Implement an annual maintenance program
to ensure proper operation and temperature
setting of valve(s).
Ÿ This valve is factory preset. However, it can
be adjusted to deliver scalding temperatures. It
is the responsibility of the installer and or
facility maintenance personnel to make sure
valve outlet temperature does not exceed
110°F (43°C) after installation, maintenance or
repair.
SUPPLIES REQUIRED:
(Not provided by Acorn)
1. Wall anchors, screws nuts and washers as
required.
2. Teflon tape for sealing water connections.
3. Supply angle stops.
4. Supply hoses.
5. 5/8” wrench, adjustable wrench and 1/8” allen
wrench.
!
IMPORTANT
Flush supply lines of all foreign material such as
Ÿ
pipe dope, chips or solder prior to connecting to
mixing valve.
To ensure proper installation review the manual
Ÿ
thoroughly to verify rough-ins before beginning
any work.
Installation and field adjustment are the
Ÿ
responsibility of the installer.
Maximum water pressure is 125 psi (8.62 bars).
Ÿ
Maximum inlet hot water temperature is 180° F
(82° C). Temperature adjustment range is 85115°F (29-46 C). Valve assembly must be
drained prior to being subjected to freezing
temperatures. Valve includes integral check
valves.
ST70-12
PRESSURE
DROP
PSID (KPA)
FLOW RATE
GPM (LPM)
ST70-38
PRESSURE
DROP
PSID (KPA)
FLOW RATE
GPM (LPM)
Cv
0.7
Cv
0.6
(5.7)
(34)
1.5
(34)
1.3
(5)
10
15
2.6
(9.8)
15
2.3
(8.7)
20
(138)
3
(11.4)
20
(138)
2.7
(10)
5
(69)
(103)
2.1
(8)
10
5
(69)
(103)
1.9
(7.1)
Acorn Controls Division of Acorn Engineering Company®, A member of Morris Group International™
Manual #7802-112-001
30
(207)
3.7
(14)
30
(207)
3.3
(12.4)
45
4.5
(17)
45
4
(15)
Page 2 of 5
60
(414)
5.2
(19.7)
60
(414)
4.6
(17.5)
(310)
(310)
Date: 04/01/14
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