Carrier MINIMUM LOAD CONTROL ACCESSORY 30RB060-390, Руководство по установке

Страница: 38 / 76

38
Step 2 — Remove Compressor Rack Holddown
Bolts —
The 30RB units are shipped with holddown bolts
securing the compressor rail assembly to the unit base frame.
These bolts are red and are located between the compressors in
the front and rear of the compressor rail assembly. These bolts
and holddown assemblies must be removed for the vibration
isolation system to operate properly. Using a 15mm socket,
loosen and remove the bolt and collar assembly as shown in
Fig. 26.
See Table 5 for the number of holddown assemblies for
each unit.
Isolation mounts for the compressor rail assembly are
located directly in front of and behind each compressor. Do
not loosen or remove the isolation mounts, only the shipping
bolts. There are 4 bolts that hold down each compressor. Do
not loosen these bolts.
Step 3 — Remove Compressor Shipping
Braces —
Each unit is equipped with compressor shipping
braces tying each compressor on the circuit together. Prior to
start-up these braces must be removed. Using a 15mm socket,
loosen each bolt and nut on each compressor tab and remove
all braces before unit start-up. Remove the compressor ship-
ping braces attached between the compressors; see Fig. 27 for
guidance.
FOR UNITS EQUIPPED WITH COMPRESSOR SOUND
BLANKETS — The sound blanket top covers are shipped in-
side the control box(es) for the unit. Remove the top covers
from the control boxes and install prior to start-up. Align the
discharge tube with the cutout on the top cover; see Fig. 28.
Firmly press the Velcro sections together, ensuring the top cov-
er is held tightly against the blanket.
Step 4 — Make Cooler Fluid, Heat Reclaim and
Drain Piping Connections —
To facilitate servicing,
it is recommended additional field-supplied air vents be in-
stalled. Locate air vents at the highest possible point of the
chilled water and heat reclaim systems. In addition to field-sup-
plied air vents, facilitate servicing in addition to flow balancing
by installing field-supplied shut-off valves, thermometers,
clean-out tees, pressure and temperature taps in the inlet and
outlet piping. Locate valves in return and supply cooler water
and heat reclaim lines as close to the chiller as possible.
In sound sensitive applications, consider the installation of
piping vibration isolators. Drain connections are provided in
the cooler. Refer to the dimensional drawings, Fig. 2-20 for lo-
cations. Insulate the drain piping (in the same manner as the
chilled water piping) for at least 12-in. (305 mm) from the
cooler.
FREEZE PROTECTION — Upon completion of the field
piping installation, freeze protection must be considered.
Freeze protection for the cooler is available from the factory
with a freeze protection option for the unit. Freeze protection
for the pump (hydronic) package is standard on all units with
the optional hydronic package (30RB060-190 units). External
piping freeze protection also must be considered. Since power
is sometimes lost for extended periods during winter storms,
freeze protection provided by heater tapes will be effective
only if a back-up power supply can be assured for the unit's
control circuit, heater and cooler pump. If not protected with
an antifreeze solution, draining the cooler and outdoor piping
is recommended if the system will not be used during freezing
weather conditions.
NOTE: See Freeze Protection section on page 54 for a more
detailed overview of freeze protection.
UNITS WITH HYDRONIC PUMP PACKAGE — The
30RB060-190 units can be equipped with a factory-installed
hydronic pump package consisting of a suction guide/strainer,
pump, combination valve, internal piping and wiring con-
nected at the factory.
BOLT
COLLAR
Fig. 26 — Compressor Rack Holddown Bolts
Table 5 — Number of Holddown Assemblies
UNIT
30RB
CIRCUIT
A + B
CIRCUIT
A
CIRCUIT
B
CIRCUIT
C
060-070 4
— —
—
080-100 4
— —
—
110-120 — 2 4 —
130-190 — 4 4 —
210-300 — 4 4 4
MODULAR
UNIT
30RB
CIRCUIT A CIRCUIT B
Module A Module B Module A Module B
315 4
4 4
4
330 4
4 4
4
345 4 4 4 4
360 4 4 4 4
390 4 4 4 4
REMOVE
COMPRESSOR
SHIPPING
BRACES
Fig. 27 — Compressor Shipping Braces Removal
A30-5427
IMPORTANT: Glycol anti-freeze solutions are highly
recommended since heater tapes provide no protection
in the event of a power failure.
INSTALL
COMPRESSOR
SOUND BLANKET
TOP COVERS
Fig. 28 — Compressor Sound Blanket Top Covers
A30-5428