Checks Before System Start-Up; Actual Start-Up - United Technologies Carrier 30RQM 160 Installation, Operation And Maintenance Instructions

2 - PRELIMINARY CHECKS
Before positioning the unit, check that:
- The chosen location can support the weight of the unit, or
that appropriate reinforcement measures have been taken.
- The unit is installed level on an even surface (maximum
tolerance is 5 mm along both axes).
- If the support structure is sensitive to vibration and/or noise
transmission it is advisable to insert anti-vibration mounts
(elastomeric mounts or metal springs) between the unit and
the structure. Selection of these devices is based on the
system characteristics and the comfort level required and
should be made by a qualified design engineer.
- There is adequate space above and around the unit for air
to circulate and for access to the components (see
dimensional drawings).
- The number of support points is adequate and that they are
in the right places.
- The location is not subject to flooding.
- For outdoor applications, avoid installing the unit in a location
where snow is likely to accumulate (in areas subject to long
periods of sub-zero temperatures, the unit should be raised).
- Baffles may be necessary to protect the unit from strong
prevailing winds. These must not restrict air flow into the unit.
CAUTION: Before lifting the unit, check that all casing panels
and grilles are securely fixed in place. Lift and set down the
unit with great care. Tilting and jarring can damage the unit.
If 30RQM/30RQP units are hoisted with slings, it is advisable to
protect coils from accidental impacts. Use sleeves or a lifting beam
to spread the slings above the unit. Do not tilt a unit by more than
15°.
CAUTION: Never apply pressure or leverage to any of the
unit's panels or uprights; only the base of the unit frame is
designed to withstand such stresses. No force or effort must
be applied to pressurised parts, especially via pipes
connected to the water heat exchanger. If a unit includes a
hydraulic module (options 116R, S, T, U, V, W), the hydraulic
module and pump piping must be installed in a way that does
not submit it to any strain. The hydraulic module pipes must
be fitted so that the pump does not support the weight of the
pipes.

2.3 - Checks before system start-up

Before the start-up of the heat pump, the complete system,
including the heat pump, must be verified against the installation
drawings, dimensional drawings, system piping and instrumentation
diagrams and the wiring diagrams. Heat transfer fluid temperatures
above the maximum recommended can lead to an increase in the
refrigerant pressure and can cause a loss of refrigerant due to the
relief valve discharge.
National regulations must be followed during these checks. If the
national regulation does not specify any details, refer to standard
EN 378 as follows:
External visual checks of the installation:
- Ensure that the machine is charged with refrigerant. Verify
on the unit nameplate that the 'fluid transported' is that
recommended for operation, and is not nitrogen.
- Compare the complete system with the refrigeration system
and power circuit diagrams.
- Check that all components comply with the design
specifications.
- Check that all protection equipment and documents provided
by the manufacturer (dimensional drawings, Pipe and
instrument diagram (PID), declarations, etc.) to comply with
the regulations are present.
- Verify that the environmental protection and safety devices
and arrangements provided by the manufacturer to comply
with the regulations are in place and compliant.
- Verify that all documents for pressure containers, certificates,
name plates, register, instruction manuals and documentation
provided by the manufacturer to comply with the regulations
are present.
- Verify that access and safety routes are unobstructed.
- Verify the instructions and guidelines to prevent the deliberate
discharge of refrigerant.
- Verify the installation of connections.
- Verify the supports and fixing elements (materials, routing
and connection).
- Verify the quality of welds and other joints.
- Check the protection against mechanical damage.
- Check the protection against heat.
- Check the protection of moving parts.
- Verify the accessibility for maintenance or repair and to check
the piping.
- Verify the status of the valves.
- Verify the quality of the thermal insulation.
- Check the condition of 400 V cable insulation.

2.4 - Actual start-up

Always ensure you have read and fully understood the operating
instructions for the units before starting up the heat pump, and
ensure the following precautions have been taken:
- Check the water circulation pumps, the air handling
equipment and any other device connected to the water heat
exchanger.
- Refer to the manufacturer's instructions.
- Refer to the wiring diagram supplied with the heat pump.
- Ensure that there is no refrigerant leak.
- Check the tightening of fixing clamps on all pipes.
- Check the power supply at the main connection point and
the order of phases.
- Check that the compressor crankcase heaters, and the
compressor head heaters if applicable, have been energized
for 6 hours before starting up the system.
- Open the suction shut-off valves on each circuit.
IMPORTANT: Commissioning and start-up must be supervised
by a qualified engineer.
- Start-up and operating tests must be carried out with a
thermal load applied and water circulating in the water
heat exchanger.
- All setpoint adjustments and control tests must be
carried out before the unit is started up.
- Refer to the Service guide.
Start up the heat pump.
Ensure that all safety devices are operational, checking
specifically that the high pressure switches are activated and
that any alarms have been cleared.
NOTE: If Carrier's recommendations (power and water
connections and installation) are not observed, then no claims
can be made under the warranty.
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