Powers SH1434 Triple Valve - Manual (Page 4)

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IS-P-SF-SH1434-TV_QV_6V 0931 EDP# 6512310 © 2009 Powers
Thermostatic water mixing valves are control devices which
must be cleaned and maintained on a regular basis.
1. 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.
2. Before servicing the valve, turn off the water supply
upstream or close the checkstops. To close the checkstops,
turn the adjusting screw clockwise.
3. When opening checkstops after servicing, turn adjusting
screw counterclockwise to fully open position. Then turn
adjusting screw 1/2 turn clockwise for final setting.
4. Every three (3) months, check the maximum temperature
adjustments.
5. Every twelve (12) months, remove the valve bonnets and
check the internal components for freedom of movement.
CAUTION:
Any changes in supply condition could effect the out-
let water temperature. Check and adjust the valves
accordingly to prevent injury to the users.
Preventative Maintenance
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See enclosed IS-P-MM430 and IS-P-SH1430.
Part List For Valve
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What to look for if:
• Outlet temperature is too hot with low flow:
1. The maximum temperature of the low flow valve was not
properly set. Refer to Set Up Procedure and reset the maxi-
mum temperature of the low flow valve.
2. The thermal actuator of the low flow valve is not working
properly. Replace thermal actuator.
• Outlet temperature is too hot with a high flow:
1. The maximum temperature of a high flow valve was not
properly set. Refer to Set Up Procedure and reset the maxi-
mum temperature of the high flow valve.
2. The thermal actuator of the high flow valve is not working
properly. Replace accordingly, see IS-P-MM430 enclosed.
• Outlet temperature too low with low and high flow:
1. The hot water temperature is too low. You must have a sup-
ply temperature of at least 5º F (3º C) higher than the set
temperature. Readjust the hot water supply.
2. The checkstops on the hot side of the valve are not fully
open, or may be stuck due to liming. Open and clean check
stops.
3. The temperature has not been set properly on the small
and/or large valve. Refer to Set Up Procedure and reset the
valves.
• Outlet flow drops off:
1. The differential across the PRV is set too high, so the
high flow valve begins controlling the system too late,
and starves the system. Refer the Set Up Procedure and
decrease the differential across PRV.
2. The checkstops on the high flow valves are not fully open or
are stuck due to liming. Open and clean checkstops
3. The system pressure varies by more than 50% of the inlet
supply pressure.
• Outlet temperature cycles between hot and cold:
1. The differential across the PRV is set too low, so the high
flow valve begins controlling the system too early, and
therefore cycles (hunt for the set point). Refer to the Set Up
Procedure and increase the differential across PRV.
2. The system pressure varies by more than 50% of the inlet
supply pressure.
Troubleshooting
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Warranty
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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 material
not manufactured by it.
NOTE: AFTER COMPLETING REPAIRS,
CHECK DISCHARGE TEMPERATURE.
RESET IF NECESSARY.
WARNING: FAILURE TO PERFORM THIS
OPERATION COULD RESULT IN UNSAFE
DISCHARGE TEMPERATURE, WHICH MAY
CAUSE INJURY OR DEATH.
!
A Watts Water Technologies Company