Paul Mueller Company
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Model D Fre-Heater® Heat Recovery System

Paul Mueller Company Model "D" Fre-Heaters® channel recovered energy into a single Fre-Heater unit, producing more than enough hot water to satisfy your needs.

With our dual jacket, there are no concerns about refrigerant leakage and our industrial-grade, fully-insulated glass storage tank assures potable water and minimal heat loss.

Model "D" Fre-Heaters are available in 50-, 80-, and 119-gallon capacities. 
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Features

  • Stainless steel outer jacket. Rust resistant exterior requires no maintenance.
  • Mueller Temp-Plate heat transfer surface cools the super-heated refrigerant from the condensing units and harvests the system’s wasted heat energy.
  • Industrial-grade, fully insulated, glass-lined storage tank assures minimal heat loss and long-term reliability.
  • Factory-installed anode(s) provides superior galvanic corrosion protection for the water storage tank. Model D-120 has 2 anodes, and Models D-50 and D-80 each have 1 anode.
  • Five-year limited warranty protects your purchase.
  • Complies with CSA regulations for the United States and Canada.
  • Temperature of hot water depends on size of condensing units and cooling time.  
  • Channels recovered energy into a single Fre-Heater unit.
  • Designed for 150 psi maximum water working pressure and 426 psi maximum refrigerant  working pressure.
  • Available in 50-, 80-, and 119-gallon capacities.
  • A Model "DE" Fre-Heater offers all of the features of standard Model "D" Fre-Heaters with the addition of a 4,500 -watt, 240-volt electric element. Available in 80- and 119-gallon sizes. 

Specifications and Sizing

Model No. Part No. Water Connection (in) No. of Refrig. Circuits Refrig. Connection Size (in) Per Circuit Refrig. Application Capacity* Height (in) Diameter (in) Approx. Shipping Weight (lb)
D-50 8823750 ¾ FPT 1 5/8 ODM .5-4  ton 53.875 21.75 225 
D2-50 8823751 ¾ FPT 2 5/8 ODM .5-4 ton  53.875 21.75  225 
D-80 8823780 ¾ FPT 2 ¾ ODM 1-5 ton  58.625 25.25  320 
D-120 8823821 1½ FPT 2 ¾ ODM 1-7.5 ton 61.75 29.5  475 
D2-120 8823820 1½ FPT 2 1 1/8 ODM 3-15 ton  61.75  29.5  475 
D2-120A** 8823817 1½ FPT 2 1 1/8 ODM  3-15 ton  61.75 29.5 475
DH-120 8823823 1½ FPT 2 1 5/8 ODM 7-35 ton  61.75 29.5  475 
DE-120 8823822 1½ FPT 2 1 1/8 ODM 3-15 ton  61.75  29.5  475
DHS-120 8825141 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120A4 8825142 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120B4 8825143 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120A6 8825213 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120B6 8825214 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DA-120*** 8823826 1½ FPT 2 1 MPT 5-25 ton 62 29.5 440

*Refrigeration tonnage capacities are 30°F evaporator ton loads, not total heat of rejection tons. Pressure drop through a Fre-Heater refrigeration circuit will be approximately 15 psi at the maximum tonnage application. Pressure drop at the mid-range of tonnage application will be approximately 5 to 7 psi. The best overall refrigeration/heat recovery system efficiency is usually obtained at or below the mid-range tonnage application.

**Aquastat included
***Ammonia only

Downloads

 Refrigeration Products CatalogDownload
 Fre-Heater® Heat Recovery System BrochureDownload

Consult With Our Experts

Paul Mueller Company Headquarters
Missouri, USA

The Americas:
+1-417-575-9000

Europe, Africa, Middle East:
+31 (0)88-6830000

Asia Pacific:
+31 (0)88-6830000

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Paul Mueller Company
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At Paul Mueller Company we are united by a belief that the only quality that matters is quality that works for life. With every piece of processing equipment we build, our goal is to have lasting impact. From solar milk coolers in rural Africa, to lifesaving medical technology we are making an impact across the globe.

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