Water Evaporator/Condenser; Refrigerant; High-Pressure Safety Switch; Storage Tank - Carrier 30RQ 039 Series Installation, Operation And Maintenance Instructions

15.8 - Water evaporator/condenser

The evaporator/condenser is a plate heat exchanger with
one or two refrigerant circuits. The water connection of the
heat exchanger is a Victaulic connection. It has a thermal
insulation of 19 mm thick polyurethane foam and includes
frost protection, as standard.
The products that may be added for thermal insulation of
the containers during the water piping connection procedure
must be chemically neutral in relation to the materials and
coatings to which they are applied. This is also the case for
the products originally supplied by Carrier SCS.
NOTEs - monitoring during operation:
• follow the regulations on monitoring pressurised
equipment.
• It is normally required that the user or operator sets
up and maintains a monitoring and maintenance file.
• If there are no regulations or to complement them
follow the control programmes of EN 378.
• If they exist follow local professional recommendations.
• regularly check for possible presence of impurities
(e.g. silicon grains) in the heat exchange fluids. These
impurities maybe the cause of the wear or corrosion
by puncture.
• The reports of periodical checks by the user or
opera-tor must be included in the supervision and
mainte-nance file.
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15.9 - Refrigerant

30RQS/RQSY units operate with refrigerant R-410A.

15.10 - High-pressure safety switch

30RQS/RQSY units are equipped with automatically reset
safety pressure switches on the high-pressure side. For the
alarm acknowledgements refer to the 30RB/RQ 017-160
Pro-Dialog+ control manual).

15.11 - Storage tank

30RQS/RQSY units are equipped with mechanically
welded storage tanks that permit storing the excess charge
when the unit operates in heating mode.

15.12 - four-way valve

This permits reversal of the cycle for operation in cooling
and heating mode and during defrost cycles.

15.13 - Control box

The control box of the 30RQS/RQSY units is equipped
with electric heaters to prevent condensation during
operation at low outside temperatures. They are installed
on the top of the control box on the outside, and are
covered by a thermal insulation layer. These heaters are
switched on, based on the outside temperature.