Mueller Model D Fre-Heater Installation and Operation Manual Eective March 1, 1993
Part No. 8800430 Revised November 6, 2019
TABLE 1: MODEL “D” FRE-HEATER TECHNICAL SPECIFICATIONS
1
Units have one 4,500-watt electric element (“A” = 208–230/60/1 and “B” = 460/60/1).
2
Units have one 6,000 watt electric element (“A” = 208–230/60/1 and “B” = 460/60/1).
3
Aquastat included.
4
Ammonia only.
6
Refrigeration tonnage capacities are evaporator tons and not heat of rejection tons.
Conditions for the capacities are: 30°F evaporator, 110°F condensing temperature, and 50°F discharge gas superheat.
Pressure drop through the Fre-Heater refrigeration circuit will be approximately 15 psi at the maximum tonnage application.
Pressure drop at the mid-range tonnage will be approximately 5 to 7 psi.
The highest percentage of heat recovered per ton is usually obtained at or below the mid range of the refrigeration tonnage capacity.
2
Model No.
Mueller
Part No.
No. of
Refrig.
Circuits
Refrigeration
Connection
Size
Per
Circuit
Refrig.
Capacity
5
Water
Connection
Size Height Diameter
Water
Tank
Capacity
(gal)
Approx.
Shipping
Weight
(Lb)
Approx.
Loaded
Weight
(Lb)
D-50 8823750 1
5
∕8" ODM .5 thru 4
3
∕4" FPT 54" 21
3
∕4'' 50 225 600
D2-50 8823751 2
5
∕8" ODM .5 thru 4
3
∕4" FPT 54" 21
3
∕4'' 50 225 600
D-80 8823780 2
3
∕4" ODM 1 thru 5
3
∕4" FPT 59" 25
1
∕4'' 80 300 940
D-120 8823821 2
3
∕4" ODM 1 thru 7.5 1
1
∕2" FPT 62" 29
1
∕2'' 119 430 1,300
D2-120 8823820 2 1
1
∕8" ODM 3 thru 15 1
1
∕2" FPT 62" 29
1
∕2'' 119 430 1,300
D2-120A
3
8823817 2 1
1
∕8" ODM 3 thru 15 1
1
∕2" FPT 62" 29
1
∕2'' 119 430 1,300
DE-120
1
8823822 2 1
1
∕8" ODM 3 thru 15 1
1
∕2" FPT 62" 29
1
∕2'' 119 430 1,300
DH-120
3
8823823 2 1
5
∕8" ODM 7 thru 35 1
1
∕2" FPT 62" 29
1
∕2'' 119 440 1,300
DHS-120 8825141 1 1
5
∕8" ODM 14 thru 70 1
1
∕4" FPT 62" 29
1
∕2'' 119 440 1,300
DHSE-120A4
1
8825142 1 1
5
∕8" ODM 14 thru 70 1
1
∕4" FPT 62" 29
1
∕2'' 119 440 1,300
DHSE-120B4
1
8825143 1 1
5
∕8" ODM 14 thru 70 1
1
∕4" FPT 62" 29
1
∕2'' 119 440 1,300
DHSE-120A6
2
8825213 1 1
5
∕8" ODM 14 thru 70 1
1
∕4" FPT 62" 29
1
∕2'' 119 440 1,300
DHSE-120B6
2
8825214 1 1
5
∕8" ODM 14 thru 70 1
1
∕4" FPT 62" 29
1
∕2'' 119 440 1,300
DA-120
4
8823826 2 1" MPT 5 thru 25 1
1
∕2" FPT 62" 29
1
∕2'' 119 440 1,300