Carrier MINIMUM LOAD CONTROL ACCESSORY 30RB060-390, Руководство по установке, Страница: 39 / 76

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The combination valve performs the following functions:
• Drip-tight shut-off valve
• Spring closure design with a non-slam check valve
• Flow-throttling valve
Refer to Fig. 2-20 for cooler connection locations. The inlet
is connected to the suction guide/strainer of the pump via a
Victaulic-type connection. The cooler supply has water-side
Victaulic-type connections (follow connection directions as
provided by the coupling manufacturer). Provide proper sup-
port for the piping. If compressor and cooler grilles have been
added, holes must be cut in the grilles for field piping and
insulation.
The suction guide/strainer is shipped from the factory with a
run-in screen. This screen is a temporary device used during
the start-up/clean-up process of the chilled water circuit to
prevent construction debris from damaging the pump or
internal tubes of cooler. After all debris has been removed or a
maximum of 24 running hours the temporary screen must
be removed. See the Controls, Start-Up, Operation, Service and
Troubleshooting guide for further information.
NOTE: Units with factory-installed hydronic pump packages
applied on open loop systems require that an additional field-
supplied strainer with a minimum size of 20 mesh be installed
within 10 ft (3.05 m) of and ahead of the cooler inlet to prevent
debris from damaging internal tubes of the cooler.
A 3 /
4
in. NPT fitting is installed in the inlet piping of the
pump for connection to an expansion tank. Install the tank in
accordance with the manufacturer's instructions.
Figures 29 and 30 illustrate typical single and dual pump
packages.
Two drain connections are provided and are located at
pump volute, and the suction guide. See Fig. 2-20 for connec-
tion location.
CAUTION
The suction guide/strainer is shipped from the factory with
a run-in screen. This temporary screen must be removed
after all debris has been removed or a maximum of 24 run-
ning hours. Failure to remove the temporary screen may
result in damage to the pump or cooler.
CAUTION
Do not circulate water through unit without strainers in
place. Failure to use the strainers represents abuse and may
impair or otherwise negatively affect the Carrier product
warranty.
PT
PT
T1 T2 F S PP PP
D
D V
D
PT
PT
Chilled
W
a ter In
Chilled
W
a ter O u t
He a ter (Option a l)
He a ter
E PT
Air S ep a r a tor with Vent *
S tr a iner/ Su ction G u ide
P u mp
Com b in a tion V a lve
I s ol a tion V a lve *
Pre ssu re Red u cing
Fill V a lve *
Flexi b le Connection s*
Pre ssu re Relief *
HYDRONIC PUMP PACKAGE
IN S IDE
UNIT
OUT S IDE
UNIT
20 Me s h S tr a iner **
LEGEND
*Field-supplied and installed.
†Factory-installed option.
**Required within 10 ft (3 m) of cooler in addition
to suction strainer for open loop systems.
D — Drain,
3
/
4
-in. NPT
D

— Drain,
1
/
4
-in. NPT
E — Expansion Tank Connection,
3
/
4
-in. NPT
FS — Flow Switch
PP — Pipe Plug,
1
/
4
-in. NPT
PT — Pressure/Temperature Tap
T1 — Leaving Water Thermistor
T2 — Entering Water Thermistor
V — Vent,
1
/
4
-in. NPT
Indicates items provided with the
optional hydronic pump package.
Fig. 29 — Typical Piping Diagram on 30RB Units with Hydronic Package — Single Pump
A30-5303