Trane IntelliPak CG-SVX02B-EN, Руководство по установке и эксплуатации, Страница: 25 / 64

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Installation
Isolate the water pumps from the system to avoid vibration
transmission. To minimize heat gain and prevent condensa-
tion, insulate all water piping. Use an appropriate pipe seal-
ant on all threaded connections.
Chilled Water Access Holes
These units have water access panels that contain perfo-
rated “circles” and panel separations (30 to 60 ton chillers
allow access through either of two sides. See Figure 7A).
Removing these “circles” provides piping access to the
chiller. Each panel contains one or two perforated “circles”,
remove both perforated "circles" per panel. Therefore, fol-
low these steps to ensure proper panel modification.
1. Refer to Figure 7A and mark an “X” on the outer perfo-
rated “circle” in each water access panel. (These are
aligned with the water inlet and outlet piping on the heat
exchanger).
2. Remove all the screws located below the perforation of
both panels. Do not remove any screws above the perfo-
ration.
3. Break both panels at the perforation by grasping them
near the bottom and bending with a back and forth mo-
tion.
4. Remove the resulting “half-moon” sections that were
marked with an “X”.
Note: Remove only the “half-moon” sections that
were marked with an “X”.
5. For 50 and 60 Ton units, an additional perforated section
in the upright brace behind the access panels must be
removed. Break this piece out with pliers and discard.
6. Apply edge protector to the upper and lower portions of
both panels along the entire length of the broken perfora-
tion as shown in Figure 7B. (The edge protector is fac-
tory provided, and is secured to the chiller foot).
7. Reinstall the lower halves of the water access panels and
secure them with the screws that were removed in step
two.
Note: The gap between the insulated pipe and the
access holes must not exceed 1/2 inch. Refer to
Figure 7C.
Air Vents
A vent port is located on top of the chiller near the return
end. Additional vents must be installed at high points in the
piping system to facilitate air purging during the filling pro-
cess.
Water Pressure Gauges
Install pressure gauge(s) at the chiller barrel to monitor the
entering and leaving solution pressure.
Note: To prevent evaporator damage, do not
exceed 150 psig evaporator pressure.
Water Shutoff Valves
Provide shutoff valves in the “Supply” and “Return” pipe
near the chiller so the gauge(s), thermostats, sensors,
strainer, etc., can be isolated during service.
Pipe Unions
Use pipe unions to simplify disassembly for system service.
Use vibration eliminators to prevent transmitting vibrations
through the water lines
Thermometers
Install thermometers in the lines to monitor the evaporator
entering and leaving water temperatures.
Balancing Valves
Install a balancing cock (valve) in the leaving water line. It
will be used to establish a balanced flow.
Note: Both the entering and leaving water lines
should have shutoff valves installed to isolate the
evaporator for service.
Strainer
The strainer is factory provided and should be installed in
the water line entering the chiller to protect the evaporator
from entrapped debris.
Chiller Drain
The chiller drain should be piped to a suitable drain facility
to facilitate evaporator draining during service or shutdown
procedures. Provide a shutoff valve in the drain line.
Note: The chiller ships without the drain plug
installed. If drain piping is not installed, remove the
drain plug from the control panel and install it in
the drain port before filling the system with water.
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WARNING
Hazardous Voltage!
Disconnect all electric power, including remote discon-
nects before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be inadvert-
ently energized. Failure to disconnect power before ser-
vicing could result in death or serious injury.
Chiller Flow Switch
Install the factory provided flow switch or other flow sensing
device, illustrated in Figure 9, to prevent or stop the com-
pressor operation if the water flow drops off drastically. A
flow switch ships standard with each unit. Locate the device
in the chilled water supply line (water outlet) as shown in
Figure 8. Refer to the field wiring and unit schematics for
the flow switch electrical interlock connections.