Manual

1. Installation should be in accordance with acceptable plumbing
practices. Flush all piping thoroughly before installation. Installation
and field adjustment are the responsibility of the installer.
2. Return loop assembly to be installed as close to building supply as
possible to prevent/minimize pressure uctuations.
3. Connect inlets, outlets and check for leaks.
4. Temperature Adjustment;
i) Turn off recirculation pump
ii) Open enough xtures to meet minimum ow requirement of:
LFMM431 = 3 GPM (11 LPM)
LFMM432 = 4 GPM (15 LPM)
LFMM433 = 5 GPM (19 LPM)
LFMM434 = 7 GPM (26 LPM)
LFMM435 = 10 GPM (38 LPM)
LFSH1432 = 1 GPM (4 LPM)
LFSH1434 = 1 GPM (4 LPM)
LFSH1435 = 5 GPM (19 LPM)
iii) Loosen temperature adjustment locknut located on top of the
bonnet.
iv) Turn temperature adjustment screw (located on top of the bon-
net) counterclockwise to increase or clockwise to decrease the
outlet temperature.
Allow valve temperature to settle in before making your next
adjustment.
v) When desired temperature is set, tighten the locknut. Turn recir-
culation pump back on. Close open fixtures.
5. Automatic Balancing Valve (ABV) Adjustment
i) Set ABV to full cold by turning knob to full clockwise position.
ii) Open enough xtures to meet minimum ow rate of the valve
(see above).
iii) Open ball valve and verify water is owing.
iv) Make sure water travels through the facility and stabilizes tem-
perature at the return thermometer.
v) While holding boiler return pipe, slowly rotate ABV knob coun-
terclockwise until warm water begins to ow. Stop rotating the
knob.
vi) Turn all xtures off and let the system stabilize (water must ow
through the entire recirculating loop).
vii) Monitor return temperature gauge. If the temperature is less
then desired, rotate ABV knob counterclockwise. If the tem-
perature is higher than desired, rotate ABV knob clockwise.
After each adjustment you must allow time for the water to ow
through the entire recirculating loop.
viii) At this point ABV is set.
ix) Open enough xtures to meet minimum ow of the valve.
x) Readjust tempering valve set point. See step 4.
xi) Check and make sure system maintains temperature. Allow the
system to reach a steady state condition.
Installation Instructions n
INLET
TO BOILER
CHECK VALVE
BALL VALVE
TEMPERATURE/PRESSURE GAUGE
ABV
CHECK VALVE
TO VALVE
USA: Phone: [phone] • Fax [phone] • www.powerscontrols.com
Canada: Phone: [phone] • Fax [phone] • www.powerscontrols.ca
IS-P-Recirculating Loop 1330 EDP# 6511213 © 2013 Powers
A Watts Water Technologies Company
Warranty n
The Seller warrants that the equipment manufactured by it and covered by this order or contract is free from defects in material and workmanship and, without
charge, equipment found to be defective in material or workmanship will be repaired, or at Seller’s option replaced F.O.B. original point of shipment, if written
notice of failure is received by Seller within one (1) year after date of shipment (unless specifically noted elsewhere), provided said equipment has been properly
installed, operated in accordance with the Seller’s instructions, and provided such defects are not due to abuse or decomposition by chemical or galvanic action.
THIS EXPRESS WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES, GUARANTEES, OR REPRESENTATIONS, EXPRESS OF IMPLIED. THERE ARE
NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. The Seller assumes no responsibility for repairs made on the
Seller’s equipment unless done by the Seller’s authorized personnel, or by written authority from the Seller. The Seller makes no guarantee with respect to material
not manufactured by it.
See attached IS-P-LFMM430 and IS-P-LFSH1430.
Valve Servicing and Part List n
WARNING: This product contains chemicals known to the
State of California to cause cancer and birth defects or
other reproductive harm.
For more information: www.watts.com/prop65
NOTICE