Powers ETV400 User Manual

HYDROGUARD

®

XP Emergency Tempering Valve

Technical Instructions

!

WARNING

Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use

information can result in death, serious personal
injury, property damage, or damage to the
equipment.

Keep this Manual for future reference.

Description n

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 Pending

Specifications n

Connections (NPT)

ETV200 .............................................. 3/4" inlets, 1" outlet

ETV400 .............................................. 1-1/4" inlets, 1-1/2" outlet

ETV500 .............................................. 2" inlets, 2" outlet

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

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

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

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

Bypass Flow Rate at 30psid*

ETV200 .............................................. 30 gpm (114 lpm)

ETV400 .............................................. 50 gpm (189 lpm)

ETV500 .............................................. 81 gpm (307 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

IS-P-ETV200_400_500

with Cold Water Bypass

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

ETV200

ETV400

ETV500

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)

3.0 gpm

11.4 lpm 50.7 lpm 71.9 lpm 87.8 lpm 101.4 lpm 124.5 lpm 152.2 lpm 176.0 lpm

3.0 gpm

11.4 lpm 128.7 lpm 182.0 lpm 223.0 lpm 257.4 lpm 315.0 lpm 386.1 lpm 446.7 lpm

3.0 gpm

11.4 lpm 184.3 lpm 260.8 lpm 319.5 lpm 369.1 lpm 452.0 lpm 553.4 lpm 639.4 lpm

C

6

15.2

21.8

V

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

13.4 gpm 19.0 gpm 23.2 gpm 26.8 gpm 32.9 gpm 40.2 gpm 46.5 gpm

34.0 gpm 48.1 gpm 58.9 gpm 68.0 gpm 83.2 gpm 102.0 gpm 118.0 gpm

48.7 gpm 68.9 gpm 84.4 gpm 97.5 gpm 119.4 gpm 146.2 gpm 168.9 gpm

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.
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 forcing the plung­er against the hot water seat.
In case of hot water failure cold water will flow through cold water
bypass to the outlet.

Thermostatic

Mixing

Chamber

Adjustment

Locking Screw

Overload

Assembly

Actuator

Body

Temperature
Adjustment
Screw

Outlet

By-Pass
Check

Cold Water
Seat

Figure 1

Installation Guidelines n

1. Flush all piping thoroughly before installing.

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

3. Locate ETV valve 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.

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 loosening adjustment locking screw and 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).

Hot Water
Seat

Cold Water

Hot Water

Plunger

Actuator Return

5. When ETV valve 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 ETV valve actuator from damage by
water shock waves generated by the quick closing valves.

6. Consult proper medical/safety authorities for the opti-

mum temperature for your application. Before use,
check for proper discharge temperature. Reset if neces­sary. Valve is preset for 85°F (29°C)

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.

NOTICE

Contact Powers application department at 800.669.5430 for
high temperature readjustment procedure.

Maintenance and Troubleshooting n

What to look for if:

• The ow of water is less then desired.

a. Stop valves or supply to HydroGuard
b. Clogged checkstop strainer screens.
c. Accumulation of lime deposit around valve seats.
d. Low supply pressure or unusual supply temperature.

®

XP not fully open.

• The ow of water is completely shutoff.

a. Stop valves or supply valves are completely closed.
b. Valves downstream from HydroGuard
c. Loss of cold water supply pressure

2

®

XP are fully closed.