Heating Coils With Direct Expansion Cooling - Trane HUV Installation, Operation And Maintenance Manual

Figure 22. Installing isolation valve actuator
2. Install body valve into pipe.
3. Wiring connections may be made either before or after
actuator installed on body.
4. Place the manual operating lever on the actuator in the
OPEN position.
5. Align actuator coupling to slot on the shaft of the valve
body and fit the head onto the valve body to ensure the
shaft seats correctly (see
6. Press the actuator and valve body until it secures
together.
Soldering procedures are as follows:
1. Remove actuator as stated earlier.
2. Place valves on the pipe. Rotate valve stem so the shaft
slot points at the notch in the side of the body (90O to
flow direction). This protects the plug inside the valve
by removing it from the seat (see
Figure 23. Preparation for soldering
3. Sweat the joints, keeping outer surface free from
solder.
Note: Do not use silver solder due to high
temperature requirements.
UV-SVN02C-EN
Figure 22).
Figure 23).
Heating Coils with Direct
Expansion Cooling
Heating options for direct expansion cooling in the unit
ventilator are hot water, steam or electric heat.
These coils facilitate direct expansion cooling with
standard capacities. The supply and return connections
are located in the right hand end pocket. Hot water field
connections are made with a 5/8 in.\[15.9\] OD male
sweated joint, while steam coils have a 1 in.\[25.4\] male
pipe thread (MPT) connection (see
Electric heat coils provide a third way to supply heating to
the direct expansion cooling. The coil utilizes three to six
preheat elements which are factory-wired.
Installation—Piping
Table 10, p. 23).
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