Install Spring Isolation; Install Water Piping To Heat Exchanger; 23Xrv Accessory Spring Isolation; Step 6 - Connect Piping - Carrier 23XRV Installation Instructions Manual

INSTALL SPRING ISOLATION

IMPORTANT: Accessory spring isolation packages are
intended solely for non-seismic applications. Seismic
applications must be designed by a registered professional
in accordance with all applicable national and local codes.
Spring isolation may be purchased as an accessory from
Carrier for field installation. It may also be field supplied and
installed. Spring isolators may be placed directly under
machine support plates or located under machine soleplates.
See Fig. 49. Consult job data for specific arrangement. Low
profile spring isolation assemblies can be field supplied to keep
the machine at a convenient working height.
Obtain specific details on spring mounting and machine
weight distribution from job data. Also, check job data for
methods to support and isolate pipes that are attached to spring
isolated machines.

NOTE: These isolators are not intended for seismic duty, but
are intended to reduce the vibration and noise levels transmit-
ted from the chiller to the surrounding environment. For instal-
lations adjacent to areas that are sensitive to noise and/or
vibration, use the services of a qualified consulting engineer or
acoustics expert to determine whether these springs will pro-
vide adequate noise/vibration suppression.
NOTE: The accessory spring isolators are supplied by Carrier for
installation in the field.
Fig. 49 — 23XRV Accessory Spring Isolation
(Shown with Accessory Soleplates)
Step 6 — Connect Piping
IMPORTANT: Chiller water nozzle connections to be
designed by others in accordance with all applicable
national and local codes.
Remove cooler and condenser liquid temperature and
optional pressure sensors before welding connecting piping
to water nozzles. Refer to Fig. 6-8. Replace sensors after
welding is complete.
INSTALL WATER PIPING TO HEAT EXCHANGERS —
Refer to Table 7 for nozzle sizes. Install piping using job data,
piping drawings, and procedures outlined below. A typical pip-
ing installation is shown in Fig. 50.
1016
a23-1537
CAUTION
ISOLATION VALVES
AIR VENT
ENTERING
LEAVING
CHILLED
CHILLED
WATER
WATER
Fig. 50 — Typical Nozzle Piping
Factory-supplied insulation is not flammable but can be
damaged by welding sparks and open flame. Protect insu-
lation with a wet canvas cover.
1. Offset pipe flanges to permit removal of waterbox cover
for maintenance and to provide clearance for pipe clean-
ing. No flanges are necessary with marine waterbox
option; however, water piping should not cross in front of
the waterbox cover or access will be blocked.
2. Provide openings in water piping for required pressure
gages and thermometers. For thorough mixing and
temperature stabilization, wells in the leaving water pipe
should extend inside pipe at least 2 in. (51 mm).
3. Install air vents at all high points in piping to remove air
and prevent water hammer.
4. Install pipe hangers where needed. Make sure no weight
or stress is placed on waterbox nozzles or flanges.
5. Water flow direction must be as specified in Fig. 51-53.
NOTE: Entering water is always the lower of the 2 noz-
zles. Leaving water is always the upper nozzle for cooler
or condenser.
6. Install waterbox vent and drain piping in accordance with
individual job data. All connections are
7. Install waterbox drain plugs in the unused waterbox
drains and vent openings.
8. Install optional pumpout system or pumpout system and
storage tank as shown in Fig. 54-58.
Never charge liquid R-134a refrigerant into the chiller if
the pressure is less than 35 psig (241 kPa). Charge as a gas
only, with the cooler and condenser pumps running, until
35 psig (241 kPa) is reached using the pumpdown mode on
the ICVC. Terminate the pumpdown mode using the
ICVC. Flashing of liquid refrigerant at low pressures can
cause tube freeze-up and considerable damage.
42
LEAVING
CONDENSER
WATER
ENTERING
CONDENSER
WATER
ISOLATION VALVES
PRESSURE
GAGES
CAUTION
3 / -in. FPT.
4
CAUTION