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. 

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