Mueller Fre-Heater D Series User Manual

Mueller Model D Fre-Heater Installation and Operation Manual Eective March 1, 1993
Part No. 8800430 Revised November 6, 2019
2.4 INSTALLING WATER PIPING
The Model “D” Fre-Heater is equipped with
3
⁄4" or 1
1
⁄2" connections for the cold water inlet and the hot water outlet,
depending on the specific model (refer to Table 1).
The water inlet connection is labeled “COLD” and the outlet connection is labeled “HOT.”
The pipe from the “HOT” outlet should go to the conventional water heating system, if one is being used. Please see
Figures 5 and 6.
FIGURE 5: TYPICAL HOT WATER DUMP VALVE PIPING
FIGURE 6: TYPICAL PLUMBING FOR FRE-HEATER WATER CONNECTION
6
Hot
Water
Outlet
Cold Water Inlet
Check
Valve
Water Dump Valve
N.O.
N.O.
N.C.
Mueller®
Fre-Heater®
Model
ERS 120-E
Only
Mueller
Fre-Heater
Hot
Water
Outlet
Cold
Water
Inlet
N.O.
N.C.
N.O.
Pressure
Temperature
Relief Valve
Drain
Hot Water Out
From Fre-Heater
(Optional)
Hot Water
In From
Fre-Heater
Conventional
Water
Heater
Hot
Water
Outlet
Pressure
Temperature
Relief Valve

Mueller Fre-Heater D Series Specifications

General

Brand	Mueller
Model	Fre-Heater D Series
Category	Water Heater
Language	English