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Any refrigerant transfer and recovery operations must be carried out using a transfer unit for HFO application. A
connection under the evaporator is supplied with all units for connection to the transfer station. The units must
never be modified to add refrigerant and oil charging, removal and purging devices. These devices are provided
with the units. Please see to the certified dimensional drawings for the units.
2. INTRODUCTION AND CHILLER FAMILIARISATION
Prior to initial start-up of the 19DV unit, those involved in the start-up, operation, and maintenance should be
thoroughly familiar with these instructions and other necessary job data. This document is outlined so that you
may become familiar with the control system before performing start-up procedures. Procedures in this manual
are arranged in the sequence required for proper chiller start-up and operation.
Since 19DV is equipped with VFD (Variable Frequency Drive), special qualifications are required for personnel
commissioning these machines or working on the variable-frequency drive.
2.1 Operating conditions range
Transport and storage of 19DV units
The minimum and maximum allowable outside temperatures are:
Minimum temperature = -15°C
Maximum temperature = +60°C.
Operating limits
In operating the minimum and maximum allowable outside temperatures are:
Minimum temperature = +5°C
Maximum temperature = +40°C.
The operating and storage conditions are as those described for the standard machine. The machines must be
installed inside the building. Electrical cabinets are protected IP23 in accordance with standard IEC60529-1.
The operating range of the selected unit must always be verified at full load and part load by the selection program
for the chosen configuration.
The selection program values apply. If they are outside the operating limits below, the selection must be validated
by the factory customer support team.
Indicative operating range of 19DV chiller
Evaporator entering water temperature
Evaporator leaving water temperature
Condenser entering water temperature
Condenser leaving water temperature
*: this minimum can be maintained with head pressure control system such as 2 or 3 way valve or any other applicable
devices…
** : In operation or before starting, the user must maintain a water inlet temperature at the evaporator of 28 ° C maximum to
avoid, in the event of extreme failure of the control system and the pressure switches, any risk of overpressure causing relief
valve exhaust.
When chiller is stopped, the maximum permissible circulation temperature in the exchangers is 65 ° C. Higher temperatures can
result in a risk of valve tripping.
2.2 Abbreviations and explanations
Frequently used abbreviations in this manual include:
CCN — Carrier Comfort Network
CCW — Counter Clock Wise
CW — Clock Wise
CHWR — Chilled Water Reclaim
CHWS — Chilled Water Supply
ECDW — Entering Condenser Water
ECW — Entering Chilled Water
EMS — Energy Management System
I/O — Input /Output
IOB — Input /Output Board
LCDW — Leaving Condenser Water
LCW — Leaving Chilled Water
LED — Light-Emitting Diode
OLTA — Overload Trip Amps
PIC 5+ — Product Integrated Controls version 5 and more
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