Mueller E-Star OESE 7.5 and 9 HP HFC Condensing Unit
Installation and Operation Manual, Part No. 8828748
Effective June 16, 2020
5.1
THERMAL EXPANSION VALVE (TEV) SELECTION AND INSTALLATION
The condensing unit’s TEV must be field adjusted to maintain the milk cooler evaporator’s superheat at 4–6°F
(2.2–3.3°C) or the chiller evaporator’s superheat at 10–12°F (5.6–6.7°C). Proper location and sizing of the thermal
expansion valve is critical. Refer to Section 5.2 for the superheat adjustment procedure.
An externally equalized TEV must be used on Mueller milk cooling applications. A sight glass must be installed at
the TEV inlet.
See Table 7 for expansion valve selection.
TABLE 7: THERMAL EXPANSION VALVE SELECTION
FIGURE 3: THERMAL EXPANSION VALVE INSTALLATION
10
Section 5.0 – Expansion Valve
No.
Description
Specifications
Part No. for Milk
Cooler Applications
Part No. for
Chiller Applications
1
R-507 TEV (7.5 HP)
1
⁄
2
" ODF inlet x
7
⁄
8
" ODF outlet
8825838
N/A
2
Sight Glass (7.5 HP)
1
⁄
2
" ODF inlet x
1
⁄
2
" ODF outlet solder
8824494
N/A
3
R-507 TEV (9 HP)
5
⁄
8
" ODF inlet x
7
⁄
8
" ODF outlet
8825840
8825850
4
Sight Glass (9 HP)
1
⁄
2
" ODF inlet x
1
⁄
2
" ODF
9813636
9813636
The TEV sensing bulb should be located
a minimum of 10 tube diameters away
from any fittings or bends.
Example:
7
/
8
" suction line (x) 10 = 8
3
/
4
".
Securely mount and insulate the TEV sensing
bulb at a 4-o’clock position on the copper
suction line. Horizontal mounting is always
recommended when possible. If vertical
mounting is required, maintain the minimum
dimensions as stated above.
4 o'clock
12 o'clock
1
2
