Table of Contents
Advertisement
MOUNTING UNIT
When unit is in proper location, use of mounting holes in base
rails is recommended for securing unit to supporting structure, or
for mounting unit on vibration isolators if required. See Fig. 5-11.
Fasteners for mounting unit are field supplied. Be sure unit is level
to within 1/8 in. (.32 mm) per foot for proper oil return to com-
pressor. Assure unit is mounted more than 20 ft from any opening
to the building.
Step 2 — Check Compressor Mounting
As shipped, units with single compressors are held down with
4 bolts through rubber grommets. All units with tandem compres-
sors are held down with 6 bolts per pair through grommets. After
unit is installed, verify mounting bolt torque 7 to 10 ft-lb (9.5 to
13.6 N•m).
Step 3 — Connect Evaporator Fluid and
Drain Piping
ALL UNITS
These chillers are supplied with factory-installed strainer (includ-
ing blow-down valve) in the entering fluid piping and flow switch
in the leaving fluid piping. Flow switch wiring is factory installed.
CAUTION
Do not circulate water through unit without strainer in place.
Failure to use the strainer represents abuse and may impair or
otherwise negatively affect the Carrier product warranty.
Piping connections are located on the front of the chiller when fac-
ing the control panel for sizes 010-030 and at the end opposite the
control panel for sizes 035-060. See Fig. 5-8, depending on model.
See Fig. 9-11 for accessory storage tank dimensions and Fig. 12
for thermistor details.
All sizes have carbon steel Victaulic IPS connections as shown in
the physical data tables. Any connecting pipe to the 30RC unit
must be of a material that will not cause any galvanic corrosion.
For this reason, dissimilar metals must not be used unless joined
by a dielectric coupling.
Provide a means of venting air from the high point of the field-in-
stalled piping as required. Install field-supplied drains in both the
entering and leaving fluid connections.
An automatic air/refrigerant separator and pressure relief valve
must in installed in the secondary circuit (water side) on the
outlet of the chiller. In the event of an evaporator leak, this
will limit the amount of R-32 refrigerant released to the
building.
After field piping is complete, freeze-up protection is recommend-
ed using inhibited glycol or other suitable inhibited antifreeze
solution and electric heat tapes in areas where piping is exposed to
low ambient temperatures (34°F [1°C] or below). Heat tapes
should possess a rating for area ambient temperatures and be cov-
ered with a suitable thickness of closed-cell insulation. Route
power for heating tapes from a separately fused disconnect. Identi-
fy disconnect as heat tape power source with a warning that power
must not be turned off except when unit is being serviced.
Installation of water systems should follow sound engineering
practice as well as applicable local and industry standards. Im-
properly designed or installed systems may cause unsatisfactory
operation and/or system failure. Consult a water treatment special-
ist or appropriate literature for information regarding filtration,
water treatment, and control devices.
16
CAUTION
Advertisement
Table of Contents
