Trane RTHD

RTHD-SVX01D-EN 51
Installation Mechanical
Water Pressure Gauges and Thermometers
Install field-supplied thermometers and pressure gauges (with manifolds,
whenever practical) as shown in Figure 15. Locate pressure gauges or taps in
a straight run of pipe; avoid placement near elbows, etc. Be sure to install the
gauges at the same elevation on each shell if the shells have opposite-end
water connections.
To read manifolded water pressure gauges, open one valve and close the
other (depending upon the reading desired). This eliminates errors resulting
from differently calibrated gauges installed at unmatched elevations.
Water Pressure Relief Valves
CAUTION
Shell Damage!
Install a pressure relief valve in both evaporator and condenser
water systems. Failure to do so may result in shell damage.
Install a water pressure relief valve in one of the condenser and one of the
evaporator water box drain connections or on the shell side of any shutoff
valve. Water vessels with close-coupled shutoff valves have a high potential
for hydrostatic pressure buildup on a water temperature increase. Refer to
applicable codes for relief valve installation guidelines.
Flow Sensing Devices
The installer must provide flow switches or differential pressure switches
with pump interlocks to sense system water flow. Flow switch locations are
schematically shown in Figure 15.
To provide chiller protection, install and wire flow switches in series with the
water pump interlocks, for both chilled water and condenser water circuits
(refer to the Installation Electrical section). Specific connections and sche-
matic wiring diagrams are shipped with the unit.
Figure 15 Typical Thermometer, Valving, and Manifold Pressure Gauge Set-up
Pressure Differential
Gauge
Pressure Differential
Gauge
Isolation
Valves
Isolation
Valves
Manifold
Manifold
Flow Switch
Shutoff
Valves
Thermometers
Thermometers
Relief
Valve
Relief
Valve
Cond
Evap
Water
Flow
Wate
r
Flow
Refer to Trane Engineering Bulletin -Series R

Chiller Sound Ratings and
Shutoff
Valves
Reg. Valve (Opt.)
Cond Water
Flow Switch
Installation Guide for sound-sensitive applications.