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1. Flush all piping thoroughly before installing.
2.  Locate HydroGuard

®

 as close as possible to the fi xture being supplied

3.  

Consult proper medical/safety authorities for the optimum 
temperature for your application.  Before use, check for proper 
discharge temperature.  Reset if necessary.  Valve is preset for 
85°F (29°C)

Prior to Installation 

1. Open emergency fi xture to allow fl ow through HydroGuard

®

2.  Loosen adjustment locking setscrew on the side of the orange top
3.  Use special wrench (provided with the valve) to adjust the dis-

charge tempered water.  Place wrench at temperature adjust-
ment screw.  Turn screw counterclockwise to full hot position

4.  Turn clockwise to desired temperature.  Allow valve temperature 

to settle before making next adjustment.

5.  When desired temperature is set, tighten the adjustment lock-

ing screw.  Remove special wrench and keep in a safe place for 
future use

6. Close emergency fi xtures

Temperature Adjustment 

1. Open emergency fi xture
2. Close hot water checkstop
3. Verify there is adequate fl ow at the emergency fi xture
4.  If there is less fl ow than required, adjust cold water bypass fl ow 

as follows: 
a)  Loosen the locknut at the top of the cold water bypass.  This 

must be all the way out to allow full range of adjustment

  b)  To increase bypass fl ow, turn adjusting screw clockwise or 

turn counterclockwise to reduce fl ow
NOTE:  Improper setting of cold water bypass may lead to con-
tinuous cold water fl ow that will effect tempered water setting.

  c) Once proper fl ow conditions are set, tighten the locknut
  d) Open hot water checkstop

NOTE:

  For any problems, refer to Troubleshooting section of this 

document or contact Powers' Technical Support Department at 
1.800.669.5430 or [email protected].

Adjustment of Cold Water Bypass 

What to look for if:

•   The fl ow of water is less then desired:

  1.   Checkstops are not fully open
  2.   Clogged checkstop strainer screen
  3.   Accumulation of lime deposits around the valve
  4.   Low supply pressure or unusual supply temperature
  5.   Bypass valve not open.  Refer to adjustment of cold water 

bypass instructions

•   The fl ow of water is completely shut off:

  1.   Checkstops are not fully open
  2.   Fixtures downstream of HydroGuard

®

 are fully closed

  3.   Loss of cold water supply

•   The tempered water is too cold:

  1.   Refer to temperature adjustment instructions
  2.   Make sure hot and cold water are at least 15°F (8°C) from 

desired set point

  3.  Cold water bypass incorrectly set

Troubleshooting 

Emergency tempering valves are control devices which must be 
cleaned and maintained on a regular basis.
  1.   Test HydroGuard

®

 system every week:

a)  Open all fi xtures and verify tempered water is still at set point

   

b)  Verify fl ow rate is adequate at fi xture

   

c)  Shut cold water checkstop to verify that fl ow through mixing 

valve shuts down immediately

   

e)  Open cold water checkstop and shut hot water checkstop.  

Verify adequate fl ow from fi xtures.  If not, refer to adjustment 
of cold water bypass instructions.

   

f)  Open hot water checkstop.  Verify temperature returns to set 

point.

  2)   Before servicing checkstops or piping, turn off the water 

upstream.  At least every twelve (12) months open up the 
checkstops and check for the free movement of the poppet.

  3)   Before servicing the valve, turn off the water supply upstream 

or close the checkstops.  To close the checkstops, turn the 
adjusting screw clockwise.

  4)   When opening checkstops after servicing, turn adjusting screw 

counterclockwise to fully open position then turn adjusting 
screw 1/2 turn clockwise for fi nal setting

  5)   Every three (3) months, check the maximum temperature adjust-

ments.

  6)   Every twelve (12) months, remove the valve bonnets and check 

the internal components for freedom of movement.

Preventative Maintenance 

See TI ES150 or TI ES200/ES400

PART LIST FOR VALVE 

USA: 

 Phone: 1.800.669.5430 • Fax 1. 847. 229 . 0526 • www.powerscontrols.com

Canada: 

 Phone: 1.888.208.8927 • Fax 1. 888. 479.2887 • www.powerscontrols.ca

IS-P-ES150-200-400XBY   0826 

EDP# 6512315 

© 2008 Powers

Warranty 

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 materia
not manufactured by it.

   

CAUTION: Any changes in supply 
condition could effect the outlet water 
temperature.  Check and adjust the 

  valves accordingly to prevent injury to the users.

!

IS-P-ES150-200-400XBY.indd   2

6/12/08   11:00:45 AM

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