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Did you know: The payback could be as quick as 6 months when you use an Armstrong Flo-Direct water heater to replace steam generation.
• Thermostatic water temperature control
• Dual thermostats provide redundancy
• Maximum temperature locking feature
• Continuous cold water flow to fixture upon hot water supply failure
• Thermal shutdown mode to protect user upon cold water supply failure
• Promotes compliance with ANSI Z2358.1-2004
Thermostatic Mixing Valves
Thermostatic
Rada Z358 series has been designed specifically to provide tepid water to emergency fixtures as detailed in ANSI Z358.1-1998.
ANSI Z358.1-1998 Related Excerpts
Sections 4.6.6, 5.4.6, 7.4.6, 9.4.5: “Delivered flushing fluid temperature shall be tepid.”
Definition Tepid: Moderately warm; lukewarm.
Section 4.1: “Emergency showerheads shall be capable of delivering a minimum of 75.5 liters per minute (20 gpm).”
Section 5.1.5: “Eyewash equipment shall be capable of delivering flushing fluid to the eyes not less than 1.5 lpm (0.4 gpm).”
Section 7.1.4: “Plumbed eye/facewash equipment shall be capable of delivering flushing fluid to the eyes not less than 11.4 liters per minute (3.0 gpm).”
Section 8.1: “Drench hoses shall deliver a minimum of 11.4 liters per minute of flushing fluid (3.0 gpm).”
Point of Use
Rada Z358-20 and Z358-40 Thermostatic Mixing Valves are suitable for installation at or near a point of use for direct repid water supply to an emergency fixture or grouping of fixtures. Groups of fixtures must meet the valve’s flow capacity requirements if there is a potential for simultaneous operation.
Central Recirculation System Control
Recirculated, tepid loops serving emergency fixtures are fundamentally different in application from standard institutional hot water recirculating systems. The limited system draw-off requirement of the emergency fixture circuit portends limited system audit capability and a subsequent underlying system management concern.
In other words, institutional loops with frequent draw-offs at diverse flow rates for hand washing, showering and bathing communicate with building management on a regular basis
(the lavatory is too hot, the shower is too cold, etc.). The capacity exists to make adjustments and corrections.
Closed loops for emergency fixtures, on the other hand, require infrequent but often a large and sudden volume of water that must be in the correct temperature range every time. Without some level of manual or automated system monitoring and correction, along with an aggressive system maintenance protocol, tepid loops present a challenge.
Therefore, Rada Thermostatic Mixing Valves are not recommended for installation as central controllers for recirculated tepid water loops. Consult factory for details.
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