D - KIMAC00512-09EN - 20/40
Relief Valves
As a safety precaution and to meet code requirements, each chiller is equipped with pressure relief valves
located on the coil condenser, evaporator, heat recovery condenser (if supplied) and liquid receiver for the
purpose of relieving excessive refrigerant pressure (caused by equipment malfunctioning, fire etc.) to the
atmosphere.
Oil Heater
The oil separator is equipped with an immersion electric heater that is installed in a tube that can be
removed without disturbing the oil or opening the refrigerant circuit.
Evaporator water flow and pressure drop
Balance the chilled water flow through the evaporator. The flow rates must fall between the minimum and
maximum values. Flow rates below the minimum values shown will result in laminar flow that will reduce efficiency,
cause erratic operation of the electronic expansion valve and could cause low temperature cut-out. On the other
hand flow rates exceeding the maximum values shown can cause erosion , vibration and may cause the break on
the evaporator water connections and tubes. Measure the chilled water pressure drop through the evaporator at
field installed pressure taps. It is important not to include valve or strainer pressure drop in these readings.
Variable chilled water flow through the evaporator while the compressors are operating is not recommended. Set
points are based upon a constant flow and variable temperature.
Heat Recovery Condenser water flow and pressure drop
Heat recovery condensers are supplied without the headers connection on both water side, entering and
leaving. These Headers must be provided by the installer locally , including the wells pockets for
microprocessor control sensors.
Balance the hot water flow through the heat recovery condenser. The flow rates must fall between the minimum
and maximum values. Flow rates below the minimum values shown will result in laminar flow that will reduce
efficiency, cause erratic operation of the unit and could cause high pressure cut-out. On the other hand flow rates
exceeding the maximum values shown can cause erosion on the condenser water connections and tubes.
Measure the hot water pressure drop through the condenser at field installed pressure taps. It is important not to
include header, valve or strainer pressure drop in these readings. Variable hot water flow through the condenser
while the compressors are operating is not recommended. Set points are based upon a constant flow and variable
temperature.
Leaving Connections
Entering Connections
Installer must provide the Headers
between the heat recovery
condenser to have only one supply
water connection and one return
water connection
Summary of Contents for EWAP 800-C18AJYNN
Page 1: ...D KIMAC00512 09EN 1 40 ...
