CALEFFI PresCal 5355H Series Installation, Commissioning And Servicing Instructions
Pre-adjustable pressure reducing valves
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PresCal™ Pre-adjustable pressure reducing valves
© Copyright 2019 Caleffi
Installation, commissioning and servicing instructions
Product range
5353H Series
Pre-adjustable pressure reducing valve with or without pressure gauge and NPT female
threaded union connections, sizes ½", ¾", 1", 1¼", 1½" and 2".
5355H Series
Pre-adjustable pressure reducing valve with or without pressure gauge and PEX expansion
union connections, size ¾".
5356H Series
Pre-adjustable pressure reducing valve with or without pressure gauge and union press
connections, sizes ¾" and 1".
5357H Series
Pre-adjustable pressure reducing valve with or without pressure gauge and union PEX
crimp connections, sizes ¾" and 1".
5359H Series
Pre-adjustable pressure reducing valve with or without pressure gauge and union sweat
connections, sizes ½", ¾", 1", 1¼", 1½" and 2".
ASSE 1003
NSF 61
www.caleffi.com
Function
Pressure reducing valves are devices which, when
installed on water systems, reduce and stabilize the
pressure of the water entering from the water supply
main. This pressure, in general, is too high and
variable for domestic systems to operate correctly.
The PresCal™ 535H series pressure reducing valves,
ideal for residential and commercial applications, feature
a dial indicator with direct readout allowing easy pressure
pre-adjustment. After installation, the valve will control at
the pre-adjusted pressure setting.
The valve is constructed of DZR low-lead forged brass
and incorporates a unique noise reducing and high
flow seat design, is easily serviced with a replaceable
cartridge and has an integral stainless steel filter
(35 mesh), suitable for water systems that may
contain sediment and debris.
The valve is ICC-ES certified to ASSE 1003, CSA B356,
NSF/ANSI 61 (180°F/82°C Commercial Hot), NSF/
ANSI 372, low lead laws and listed by ICC-ES. It meets
codes IPC, IRC and UPC for use in accordance with the
US and Canadian plumbing codes.
1
NA10397.03
535H Series
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Summary of Contents for CALEFFI PresCal 5355H Series
- Page 1 NA10397.03 www.caleffi.com PresCal™ Pre-adjustable pressure reducing valves 535H Series © Copyright 2019 Caleffi Installation, commissioning and servicing instructions Function Pressure reducing valves are devices which, when installed on water systems, reduce and stabilize the pressure of the water entering from the water supply main.
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Page 2: Safety Instruction
SAFETY INSTRUCTION This safety alert symbol will be used in this manual to draw attention to safety related instructions. When used, the safety alert symbol means. ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD. WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. -
Page 3: Consigne De Sécurité
CONSIGNE DE SÉCURITÉ Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant instructions. Lorsqu'il est utilisé, ce symbole signifie. ATTENTION! DEVENEZ ALERTE ! VOTRE SÉCURITÉ EST EN JEU ! NE PAS SUIVRE CES INSTRUCTIONS PEUT PROVOQUER UN RISQUE DE SECURITE. -
Page 4: Technical Specifications
Technical specifications Materials: - Body: DZR low-lead brass EN 12165 CW724R - Cover: glass reinforced nylon PA66M40/1 - Control stem: stainless steel EN 10088-3 (AISI 303) - Moving parts: DZR low-lead brass EN 12165 CW724R - Diaphragm & seals: peroxide-cured EPDM Compensation piston rings: PTFE - Filter... -
Page 5: Hydraulic Characteristics
Hydraulic characteristics Graph 1 (Circulation speed) V (f/s) V (m/s) 0.45 1 /2” 2” 1/2” 3/4” 1” 1 1/4” 0.15 5351 5350 ∆p (bar) ∆p (m w.g.) - Page 6 Graph 2 (Pressure drop) ∆ p (psi) ∆ p (kPa) Reference values: Upstream pressure = 116 psi (800 kPa) Downstream presssure = 43 psi (300 kPa) Sizing procedure Flow velocity is recommended to be kept within 3 to 6 feet per second when calculating the correct pressure reducing valve size.
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Page 7: Installation Recommendations
Installation Before following the numbered steps listed, the installer must: a) Be sure this pressure reducing valve is compatible with the other equipment in the system that it may interact with or come into contact; b) Assess and acknowledge all hazards related to the use of the this product, including potential leakage, by installing this unit properly;... - Page 8 Installation When installing the pressure reducing valve upstream of a hot water tank, installing an expansion tank, or similar, is recommended to absorb the increase in pressure due to the thermal expansion of water. When installing in large buildings, short pipes or expansion valves, and/or similar equipment, is recommended to limit the increased pressure due to the thermal expansion of water caused by temperature changes downstream of the pressure reducing valve itself (or downstream of the first and second stage pressure reducing valves, if two are used).
- Page 9 PVC jumper nipple with male union thread. The length of the jumper nipple matches the 535H valve face-to-face dimension, allowing the piping to be completed prior to the installation of valve and permitting quick change out from the jumper to the valve. Face-to-Face Code Description...
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Page 10: Maintenance
Maintenance The pressre reducing valve must be checked and serviced to comply with applicable regulations. Even when installed, commissioned and serviced properly, the pressure reducing valve's internal components are subject to normal wear and tear, which may result in leaks and other malfunctions. -
Page 11: Troubleshooting
Troubleshooting System failures are not always caused by the pressure reducing valve. Most frequently: 1. Increased downstream pressure in the presence of a water heater If the downstream pressure increases beyond the desired setting due to an inline water heater, install an expansion t a n k b e t w e e n t h e p r e s s u r e r e d u c i n g valve and the water heater to absorb t h e... - Page 12 Leave this manual at the service of users for their use Caleffi North America, Inc. 3883 W. Milwaukee Road Milwaukee, WI 53208 T: 414.238.2360 F: 414.238.2366 04-6-19...