35
Step 4 — Connect Piping
INSTALL WATER PIPING TO HEAT EXCHANGERS —
Refer to Table 27 for nozzle sizes. Install piping using job data,
piping drawings, and procedures outlined below. A typical pip-
ing installation is shown in Fig. 15.
1. Offset pipe flanges to permit removal of waterbox cover
for maintenance and to provide clearance for pipe
cleaning. No flanges are necessary with marine waterbox
option; however, water piping should not cross in front of
the waterbox or compressor because service access will
be blocked.
2. Provide openings in water piping for required pressure
gages and thermometers. For thorough mixing and tem-
perature stabilization, wells in the leaving water pipe
should extend inside pipe at least 2 in. (50 mm).
3. Install air vents at all high points in piping to remove air
and prevent water hammer.
4. Field-installed piping must be arranged and supported to
avoid stress on the equipment and transmission of vibra-
tion from the equipment. Piping must be installed to pre-
vent interference with routine access for the reading, ad-
justing, and servicing of the equipment. Provisions
should be made for adjusting the piping in each plane for
periodic and major servicing of the equipment.
5. Water flow direction must be as specified in Fig. 16 and 17.
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. Consult certified drawings for con-
nection size.
7. Install waterbox drain plugs in the unused waterbox
drains and vent openings.
8. Install optional pumpout system as shown in Fig. 18
and 19. See Tables 28 and 29.
9. Isolation valves are recommended on the cooler and con-
denser piping to each chiller for service.
10. Apply appropriate torque on the retaining bolts in a criss-
cross pattern for the water box covers before insulating
the water box cover. The gasket can relax during trans-
portation and storage and the water box cover requires
retightening of the bolts.
ACCESSORY
SPRING
ISOLATOR
LEVEL
FOUNDATION
RESILIENT SHEER
FLEX PAD, BONDED TO
TOP AND BOTTOM OF
SPRING MOUNT
NOTE: The accessory spring isolators
are supplied by Carrier for installation in
the field if the accessory is purchased.
Fig. 14 — 19XR Accessory Spring Isolation (Shown with Accessory Soleplates)
CAUTION
Factory-supplied insulation is not flammable but can be
damaged by welding sparks and open flame. Protect insu-
lation with a wet canvas cover.
CAUTION
To prevent damage to sensors, remove cooler and con-
denser water temperature sensors before welding connect-
ing piping to water nozzles. Refer to Fig. 9. Replace
sensors after welding is complete.
CAUTION
When flushing the water systems, isolate the chiller from
the water circuits to prevent damage to the heat exchanger
tubes.
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