Powers 440 Series Fotopanel - Manual (Page 3)

3
Troubleshooting and Repair for Series 440 High Capacity Valves
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What to look for if:
• The maximum temperature cannot be obtained...
a. Lime deposits may have accumulated in the hot water pipes,
restricting the hot water supply.
b. The hot water supply temperature may be too low.
c. The knob rotation setting may be too low. Remove knobs and
stainless box assembly, then readjust the high temperature
limit stop.
• Flow of water is less than desired…
a. The upstream supply valves may not be fully open.
b. The inlet supply pressure(s) may be low.
c. Lime deposits may have accumulated in cartridge, restricting
water flow. Replace cartridge kit.
d. The fixture head may be clogged. Remove and clean.
e. The checkstops may be clogged. Clean checkstops.
• The valve opens with hot water flow rather than cold water
flow...
a. The inlet water supplies are connected to the wrong ports or
cartridge is installed improperly. The tempered water is too
cold, although cartridge has been replaced, OR the hot water
temperature is below 115°F.
b. Raise the temperature of the hot water supply.
• Flow of water is completely shut off...
a. The upstream supply valves may be completely closed.
b. The hot or cold water supply pressure may have failed. The
e427/e428 valve is designed to close down upon cold water
failure.
c. The checkstops may be closed. Access the checkstops and
open by turning the adjustment screw fully counterclockwise.
Temperature Setting for Series 440 High Capacity Valves
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The standard e427/e428 HydroGuard is factory set to deliver tem-
pered water up to a maximum temperature of 110°F (43°C) with
equal supply pressures, hot water temperature 140°F (60°C), cold
water temperature 60°F (16°C). If desired, the maximum tempera-
ture setting can be raised or lowered as follows:
Maximum temperature setting adjustment must be set on the job
to no greater than 110°F [43°C]. The high temperature limit stop is
located on the bonnet. Rotate handle to the maximum desired out-
let temperature. With an open-end wrench, screw high tempera-
ture limit stop into bonnet until it touches stem’s shoulder. Close
valve and open it to full hot to verify settings.
WARNING !
SERIES 440
FOTOPANEL
High Capacity
440-3000
For parts not covered above, refer to Technical Instruction MV440-2.
EXISTING VALVE BODY
KIT, CARTRIDGE ASSEMBLY
KIT, MOTOR ASSEMBLY
KIT,
BONNET ASSEMBLY
Replacement Parts Kit
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Description Repair Kit
Motor Kits 427 250 Standard
427 251 Low
427 252 High
Bonnet Assembly Kit 427 019
Cartridge Assembly Kit 427 017