Install Instructions

EXTERNAL EQUALIZER
EVAPORATOR
REMOTE
BULB
EXPANSION
VALVE
DISTRIBUTOR
INCORRECT
REMOTE BULB LOCATION
SHOWN TRAPPED
EXTERNAL EQUALIZER
EVAPORATOR
REMOTE
BULB
EXPANSION
VALVE
DISTRIBUTOR
CORRECT
REMOTE BULB LOCATION
SHOWN FREE-DRAINING
INSTALLATION INSTRUCTIONS
1. Warning: Before opening any system, make sure the pressure in the system is brought to and remains at atmospheric
pressure. Use approved refrigerant recovery methods when necessary. Failure to comply can result in system damage
and/or personal injury.
2. Valves may be installed in any position, but should be located as close as possible to the distributor or evaporator inlet.
3. Foreign matter in the thermal expansion valve may cause diaphragm failure, flooding, or starving of the valve. Use of an
Emerson liquid line filter-drier is strongly recommended.
4. Valves are factory set to a specific superheat. If adjustment is needed, refer to Superheat Adjustment section for proper
procedure. Improper adjustment of superheat can result in system damage.
5. Proper valve sizing is important. An oversized valve may result in erratic control. An undersized valve considerably
reduces system capacity.
6. Be sure valve is installed with its flow arrow corresponding to the flow direction thru the piping.
7. Install line connections to valve. On valves with solder connections, wrap wet cloths around the valve to prevent valve
damage while brazing. Direct torch away from valve (see Figure 1).
8. Attach the remote bulb to the suction line as close to the evaporator outlet as possible. Position the bulb at the 4 or 8
o’clock position. Clean surface of suction line where the remote bulb is to be attached, and then securely fasten the bulb
with straps provided. If the remote bulb can be affected by the surrounding ambient, then the bulb should be insulated
with a material that will not absorb water. See figure 2.
9. Connect one end of the external equalizer line to the valve. Connect the other end to the suction line slightly downstream
from the remote bulb location and positioned so that it cannot siphon oil from the suction line.
10. Check for leaks, sufficient system refrigerant charge, and be sure no flash gas is present before attempting to check
valve operation.
11. The expansion valve must be free of all contaminants - install an Emerson liquid line filter-drier before the valve.
TF E 10 H C
Valve External Capacity Refrigerant Charge
Series Equalizer Nominal Code Code
Rating in M = R134a C = med temp
Tons H = R22 Z = low temp
S = R404A W = MOP (if needed)
P = R507
TFE NOMENCLATURE
Figure 1
Always direct torch flame away
from valve body when brazing.
Figure 2