42 UNT-SVX07B-EN
Installation—Mechanical
1. Pressurize the building piping system with water and vent any trapped air at system vents.
2. For units with manual air vents, back the set screw out to expel air from the unit and then re-
tighten the set screw.
The automatic air vent should require no adjustment for
the coil to vent. However, if the coil does
not vent immediately, unscrew the outer portion of the fitting to expel air from the port.
If debris has become trapped in the vent, completely remove the outer portion of the fitting and
clean.
External Insulating Requirements
Insulate and vapor seal surfaces colder than surrounding air dew-point a to prevent unplanned
condensation. Trane recommends field-insulation of the following areas to prevent potential
condensate problems:
1. Supply and return water piping connections
2. Condensate drain lines and conne
ctions
3. Fresh air intake duct connections
4. Discharge duct connections
5. Wall boxes
Balancing The Manual Circuit Setter Valve
The manual circuit setter valve is an optional end valve supplied on the return pipe of the factory
piping package. The valve allows the operator to regulate water flow through the hydronic coil,
balance the water flow through the unit with other units in the piping system, and serves as a
shutoff or end valve. See Figure 10.
Figure 9. Manual coil air vent with Shrader fitting
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