Responsibilities Of Installing Contractor(S) - Trane CenTraVac Installation - General Information

Responsibilities of Installing
Contractor(s)
A list of the contractor
responsibilities typically associated
with the unit installation Process is
provided below. Also see Table 1.
1. Locate and maintain the loose
parts, i.e. isolators, bulb wells,
temperature sensors, flow
sensors or other factory-ordered
field installed options, for
installation as required. Loose
parts are located in the starter
panel on units with factory-
installed unit-mounted starters
or in the motor terminal box for
units with remote-mounted
starters.
2. Install unit on a foundation with
flat support surfaces level within
1/16" and of sufficient strength to
support concentrated loading.
3. Place manufacturer-supplied
isolation pad assemblies under
unit. (Use spring isolators for
upper floor installations.)
4. Install unit per applicable Trane
Installation Manual.
5. Complete all water piping and
electrical connections
Note: Field-piping must be
arranged and supported to avoid
stress on the equipment. It is
strongly recommended that the
piping contractor refrain from
piping closer than 3'-0" [914 mm]
minimum to the equipment. This
will allow for proper fit-upon
arrival of the unit at the job-site.
Any adjustment that is necessary
can be made to the piping at that
time.
6. Where specified, supply and
install valves in water piping
upstream and downstream of
evaporator and condenser water
boxes to isolate shells for
maintenance and to balance and
trim system.
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General Information
7. Supply and install flow switches
(or equivalent devices) in both
chilled water and condenser
water piping. Interlock each
switch with proper pump starter
to ensure that unit can operate
only when water flow is
established.
8. Supply and install taps for
thermometer and pressure
gauges in water piping adjacent
to inlet and outlet connections of
both evaporator and condenser.
9. Supply and install drain valves to
each water box.
10. Supply and install vent cocks on
each water box.
11. Where specified, supply and
install strainers ahead of all
pumps and automatic
modulating valves.
12. Supply and install pressure-relief
piping from pressure-relief
rupture disc to atmosphere.
13. If necessary, supply sufficient
HCFC-22 refrigerant (maximum
of 1 Lb. Per machine) for leak
testing and dry nitrogen (8 psig
[55 kPa] per machine) for
pressure testing under
manufacturer's supervision.
14. Start unit under supervision of a
qualified service technician.
15. Where specified, supply and
insulate evaporator and any
other portions of machine as
required to prevent sweating
under normal operating
conditions.
16. Unit-Mounted Starters Only
Remove top of starter panel and
cut access area for line-side
wiring; front left quadrant of top
provides recommended access
to starter lugs.
17. Supply and install wire terminal
lugs to starter.
18. Unit-Mounted Starters Only
Supply and install field wiring to
line-side lugs of starter.
ASHRAE Standard 15
Compliance
Trane recommends that indoor
CenTraVac ® unit installations only be
made in equipment or plant rooms
that fully meet or exceed the
guidelines of ASHRAE Standard 15,
in addition to any applicable local,
state, or national requirements. At a
minimum this would typically
include:
• The equipment room should have
a refrigerant monitor or detector
that is capable of monitoring and
alarming within the acceptable
exposure level of the refrigerant,
and that can actuate mechanical
ventilation.
• The equipment room should have
an audible or visual alarm (other
than the light on the monitor) that
is controlled by the monitor. The
alarm should annunciate inside of
the equipment room and outside
of each entrance to the equipment
room.
• The equipment room should be
properly vented to the outdoors,
using mechanical ventilation that
can be activated by the refrigerant
monitor.
• The purge discharge and the
rupture disk must be properly
piped to the outdoors.
• If required by local or other codes,
a self-contained breathing
apparatus should be available in
close proximity to the equipment
room.
Refer to the latest copy of ASHRAE
Standard 15 for specific guidelines.
Trane assumes no responsibility for
any economic, health, or
environmental issues that may result
from an equipment room's design or
function.
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