Installation
Installation responsibilities
Generally, the contractor must do the following when installing an RTUB/RTCA unit.
•Install the units on a flat foundation, level (within 1/4" [6 mm] across the length of the unit), and strong enough to support unit loading.
•Install the units per the instructions contained in the Installation section of this manual.
•Install any optional sensors and make electrical connections at the
•Where specified for the RTUB, provide and install valves in the water piping upstream and downstream of the evaporator water connections, to isolate the evaporator for maintenance and to balance and trim the system.
•Furnish and install a flow switch and/or auxiliary contacts to prove
•Furnish and install pressure gauges in the inlet and outlet piping of the evaporator (for RTUB).
•Furnish and install a drain valve to the bottom of the evaporator water box (for RTUB).
•Supply and install a vent cock to the top of the evaporator water box (for RTUB).
•Furnish and install strainers ahead of all pumps and automatic modulating valves.
•Furnish and install check valves on the discharge lines (between oil separators and condenser) in order to avoid any refrigerant migration leading to catastrophic damages to evaporator and/or compressor (due to
•Interconnect the RTUB and the remote condenser.
•Provide and install field wiring.
•Install heat tape and insulate the
•Start the unit under the supervision of a qualified service technician.
Storage
If the chiller is stored for a long period of time prior to installation, the following precautionary measures must be taken:
•Store the unit in a safe place sheltered from bad weather
•At least every three months (quarterly), check the pressure in the refrigerant circuits to verify that the nitrogen holding charge is intact. If it is not, contact a qualified service organization and the appropriateTrane sales office.
•Close the discharge and
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