Trane RTAF HE Series, Установка, эксплуатация и обслуживание

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RLC-SVX19A-E4 25
Evaporator Piping
Pressure Gauges
Install fi eld-supplied pressure components as shown in
Figure 6. Locate pressure gauges or taps in a straight run
of pipe; avoid placing them near elbows.
To read manifold pressure gauges, open one valve and
close the other (depending on the side of the desired
reading), this eliminate errors resulting from differently
calibrated gauges installed at unmatched elevations.
Pressure Relief Valves
Install a water pressure relief valve in the evaporator inlet
piping between evaporator and the inlet shutoff valve.
Water vessels with close-coupled shutoff valves have
high potential for hydrostatic pressure buildup on a water
temperature increase. Refer to applicable local codes for
relieve valve installation.
Evaporator Flow Switch
Specifi c connection and schematic wiring diagram
are shipped within the unit. Some piping and control
schemes, particularly those using a single water pump
for both chilled and hot water, must be analyzed to
determine how and/or if a fl ow sensing device will
provide the desired operation.
Flow Switch Installation – Typical Requirements
1. Mount the switch upright, with a minimum of 5 pipes
diameters of straight horizontal run on each side. Do
not install close to elbows, orifi ces, or valves. The
arrow on the switch must point in the direction of the
fl ow.
2. To prevent switch fl uttering, remove all air from the
water system. Tracer UC800 provides a 6 second time
delay after a “loss-of-fl ow” diagnostic before shutting
the unit down. Contact a Trane service representative
if nuisance machine shutdowns persist.
3. Adjust the switch to open when water fl ow falls
below nominal values. Evaporator data is given
on the General Information Section. Flow Switch
contacts are closed on proof of water fl ow.
4. Install a pipe strainer in the entering evaporator-
water line to protect components.
CAUTION! Control voltage from the chiller to the fl ow
proving device is 110V AC.