Powers ES150 User Manual

HYDROGUARD

®

XP Emergency Tempering Valve

Technical Instructions

Description n

ES150 HydroGuard® XP Emergency Tempering valves thermostatically blend
hot and cold water to deliver tepid water to emergency fixtures, quickly com­pensating for temperature variations due to the changes in inlet temperature
or pressure. Powers' exclusive internal bypass ensures cold water flow in
the event of loss of hot water.

US Patent 6,575,377

IS-P-ES150

with Cold Water Bypass

Specifications n

Connections ............................................................. 1/2" NPT inlets and outlet

Maximum Operating Pressure ............................. 125psi (861 kPa)

Maximum Hot Water Temperature . ..................... 180°F (82°C)

Temperature Adjustment Ranges ........................ 60 - 95°F (15 - 35°C)

Factory Set Temperature* .................................... 85°F (29°C)

Bypass Flow Rate at 30psid* ................................ 6.5 gpm (25 lpm)

Maximum Flow with Cold Water Shutoff* .......... 0.5 gpm (1.9 lpm)

Listing ........................................................................ ASSE 1071

* When tested under conditions specified in ASSE 1071 Standard

Advanced Thermal Activation

WARNING

!

FAILURE TO COMPLY WITH PROPER
INSTALLATION AND MAINTENANCE
INSTRUCTIONS COULD CONTRIBUTE TO THE
VALVE FAILURE, RESULTING IN INJURY AND DEATH.
TO ENSURE THE ACCURATE AND RELIABLE

OPERATION OF THIS PRODUCT, IT IS ESSENTIAL TO:

• Properly size each valve based on the individual

application.

• Properly design the recirculation system to minimize

pressure and temperature variations.

• Check outlet temperature to ensure it does not

exceed 110°F (43°C). Make sure temperature limit
stop is properly reset to maximum 110°F (43°C)
following valve maintenance or repair. Tampering
with limit stop in any way may result in scalding
temperature causing serious bodily harm and/or
death.

Periodic Inspection/Maintenance: OPERATION
OF EMERGENCY VALVES AND FIXTURES SHOULD
BE TESTED WEEKLY PER ANSI Z358.1. In addition
conduct an annual maintenance program by a
licensed plumber or a qualified service techni­cian to ensure proper operation of the critical
components. Regular checking and cleaning of the
thermostat assembly assures proper product func­tion. Corrosive water conditions, temperatures over
210°F, unauthorized adjustments or repair could
render the valve ineffective for the service intended.

Capacity n

Model

ES150

Flow Capacity at 85°F (29.4°C)

Pressure Drop Across Valve

Min. Flow

to ASSE 1071 (34 kPa) (69 kPa) (103 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)

1.0 gpm

3.8 lpm 13.6 lpm 18.9 lpm 23.5 lpm 26.9 lpm 32.9 lpm 40.5 lpm 46.6 lpm

C

1.59

V

5psi 10psi 15psi 20psi 30psi 45psi 60psi

3.6 gpm 5.0 gpm 6.2 gpm 7.1 gpm 8.7 gpm 10.7 gpm 12.3 gpm

Body

Cold Water

Mixing Chamber

Secondary Bypass Spring

Primary Bypass

Secondary Bypass

Temperature
Adjustment
Screw

Adjustment
Locking
Screw

Thermostatic

Actuator

Hot Water

Hot/Cold Water Shuttle

Return Spring/
Primary Bypass Spring

Operation n

Hot and cold water supplies enter HydroGuard® XP at indicated
ports (see Fig. 1) then flow past plunger and seats. Next, hot
and cold water flow is directed to the mixing chamber where the
thermostatic actuator is located.
The temperature adjustment screw moves the actuator to
determine the discharge temperature. If discharge temperature
rises due to inlet pressure or temperature, the actuator expands,
decreasing flow of hot water. The reverse occurs with a drop in
discharge temperature.
Cold water supply failure - causes actuator to expand effectively
closing hot water port.
Hot water supply failure - causes actuator to contract opening
cold water bypass ports.

Adjustment and Testing n

1. Loosen adjustment locking screw

2. Check outlet temperature, which is factory set to 85°F (29°C).
If it is not, reset it by rotating temperature adjustment screw
clockwise to reduce temperature or counterclockwise to
increase the outlet temperature.

3. Close cold water checkstop. Verify that flow shuts down
immediately.

4. Open cold water checkstop. Close hot water checkstop.
Verify adequate flow from fixture(s).

5. Open hot water checkstop, verify temperature returns to set
temperature.

6. Tighten adjustment locking screw.

7. Record test data on maintenance tag which should be pro­vided by the facility.

NOTE: Contact Powers application department at

800.669.5430 for high temperature readjustment pro-

cedure.

Installation Instructions n

1. Flush all piping thoroughly before installing.

2. The installation and field adjustment of ES150 is the respon­sibility of the installer and shall be carried out in accordance
with the following steps.

3. Locate ES150 as close as possible to the fixture being sup­plied. It shall be accessible for testing, adjustment and/or
maintenance in its installed position.

4. Shutoff valves are installed for maintenance purposes.

Provision shall be made to prevent unauthorized shutoff.

5. When ES150 supplies tempered water to self-closing and/or
solenoid valves, provide a shock absorber (Powers' part # 460

353) on the discharge line. This protects the ES150 actuator
from damage by water shock waves generated by quick clos­ing valves.

6. 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)

Figure 1

Maintenance and Troubleshooting n

What to look for if:

• The ow of water is less then desired.

a. Stop valves or supply to HydroGuard® not fully open.
b. Clogged checkstop strainer screens.
c. Accumulation of lime deposit around valve seats.
d. Low supply pressure or unusual supply temperature.

• The ow of water is completely shut off.
a. Stop valves or supply valves are completely closed.
b. Valves downstream from HydroGuard® fully closed.
c. Loss of cold water supply pressure

2