Powers 430/1430 Series HydroGuard Multi-Valve Hi/Lo Systems - Manual (Page 3)

420 Valve
5. Use the handle to close the valve (rotate fully clockwise).
Replace lock washer and handle retaining screw.
Adjust the temperature of the 430 valve
1. Loosen the temperature adjustment lock screw (on side)
with hex key. Turn the knob fully counterclockwise.
2. Hold the knob in place, and use hex key to turn the max-
imum temperature setting screw (on top). Turn in small
increments to let the thermostatic motor adjust.
Turn hex key counterclockwise to increase the maxi-
mum temperature
Turn hex key clockwise to decrease the maximum tem-
perature setting.
3. When water is at desired outlet temperature, tighten
temperature adjustment lock screw (hex hole on side) by
turning clockwise.
TROUBLESHOOTING
Outlet temperature is too hot with a low flow…
• The maximum temperature of the small valve (420) was
not properly set. Refer to Set Up Procedure and reset
the max. temp. of this valve.
• The thermal motor of the small valve is not working
properly. Test and replace according to the appropriate
technical instructions (#TI420-1, #TI427, #TI430-1).
Outlet temperature is too hot with a high flow…
• The maximum temperature of the large valve (430) was
not properly set. Refer to Set Up Procedure and reset
the max. temp. of this valve.
• The thermal motor of the large valve (430) is not working
properly. Test and Replace according to TI430-1.
Outlet temperature stable, but creeps high
overnight…
• The recirculation lines are not properly plumbed. Refer
to Application and drawing on page 1.
• The PRV is opening to soon. Refer to Set Up Procedure
and reset the differential across the PRV.
• The return pump runs constantly. Install and Aquastat
on the return pump. Refer to Application and drawing
on p.1.
counterclockwise. This will decrease the handle rota-
tion and the maximum adjustable temperature.
If the measured temperature is below the desired maxi-
mum outlet temperature, move the limit stop one spline
clockwise. This will increase the handle rotation and
the maximum adjustable temperature.
4. When the valve has the correct maximum temperature
setting, close the fixtures.
5. Use the handle to close the valve (rotate fully clockwise).
Replace valve handle and sleeve and secure with screw.
Adjust the temperature of the 427 valve
The Standard 427/8 Hydroguard valve is factory set to deliv-
er 115°F [46°C] tempered water with hot water supply at
140°F [60°C] and cold water supply at 60°F [16°C].
1.
Turn the handle fully counterclockwise to deliver water
at the maximum temperature.
2. Remove the handle retaining screw, and the lock wash-
er Inside the handle will remain 2 lock screws.
3. If the measured temperature exceeds the desired maxi-
mum outlet temperature, use an Allen wrench to turn
these temperature adjustment screws clockwise. This
will decrease the maximum adjustable temperature.
If the measured temperature is below the desired maxi-
mum outlet temperature, use an Allen wrench to turn
these temperature adjustment screw counterclock-
wise. This will increase the maximum adjustable tem-
perature.
4. When the valve has the correct maximum temperature
setting, close the fixtures.
Bonnet Stop Stem
Splined Limit Stop
Remove Handle
Screw and Washer
C
H
110 °
100 °
PO
W ERS
60 °
OFF
Allen wrench
Decrease max. temp.
Increase max. temp.
Temp. Adjustment Lock Screw
5/16" Hex key on 431
1/8" Hex Key on 432, 433, 434
Max. Temp. Setting Screw
5/16" Hex key on 431
1/8" Hex Key on 432, 433, 434
427 Valve
TI430-420 Page 3