Operating instructions

10
Do not loosen waterbox bolts until the waterbox has been
completely drained.
Do not loosen a packing gland nut before checking that
the nut has a positive thread engagement.
Periodically inspect all valves, fittings, and piping for
corrosion, rust, leaks, or damage.
During refrigerant removal and storage operations follow
applicable regulations. These regulations, permitting
conditioning and recovery of halogenated hydrocarbons
under optimum quality conditions for the products and
optimum safety conditions for people, property and the
environment are described in standard NFE 29795.
Any refrigerant transfer and recovery operations must be
carried out using a transfer unit. A 3/8” SAE connector on
the manual liquid line valve 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.

Prior to initial start-up of the 19XR 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.
19XRV units: Special qualifications are required for
personnel commissioning these machines or working on
the variable-frequency drive.
Transport and storage of 19XR units
The minimum and maximum allowable outside temperatures
are:
Minimum temperature = -20°C
Maximum temperature = +48°C.
Operating limits
• 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.

  
Evaporator entering water temperature, °C 7 20
Evaporator leaving water temperature, °C 3.3 12
  
Condenser entering water temperature, °C 12.8 35
Condenser leaving water temperature, °C 29 45
• Negative evaporator temperature applications are
possible depending on the temperature conditions at
the condenser. Please refer to the selection program
to determine the operating routine possibilities.
• Unit selections are available from the Carrier sales teams.
WARNING: Do not short or jumper between terminations
on circuit boards or modules; control or board failure
may result.
Be aware of electrostatic discharge (static electricity)
when handling or making contact with circuit boards or
module connections. Always touch a chassis (grounded)
part to dissipate body electrostatic charge before working
inside control centre.
Use extreme care when handling tools near boards and
when connecting or disconnecting terminal plugs. Circuit
boards can easily be damaged.
The electromagnetic emission and immunity levels comply
with the requirements for an industrial environment and
are not designed for operation in a residential environment.
This equipment uses, and can radiate, radio frequency
energy. If not installed and used in accordance with the
instruction manual, it may cause interference to radio
communications.

The machines that carry the CE mark must comply with
the following European directives:
• Pressure equipment directive (PED) 97/23/EC
• Machinery directive 98/37/EC, modified
• Low voltage directive 2006/95/CE
• Electromagnetic compatibility (EMC) 2004/108/EEC
To ensure compliance with the directives, the machines were
designed in conformance with the harmonised standards:
• EN60204-1: Machine safety, electrical equipment for
machines, part 1: general regulations
• EN61000-6-2 and EN61000-6-4: Electromagnetic
compatibility in industrial environments.
These do not apply to 19XRV units - for 19XRV particulars
refer to chapters 8 to 14.

Frequently used abbreviations in this manual include:
 Chiller Control Module (control of entering/leaving conditions)
 Carrier Comfort Network
 Counterclockwise
 Clockwise
 Entering Chilled Water
 Entering Condenser Water
 Energy Management System
 Hot Gas Bypass
 Interface Chiller Visual Control (control interface)
 Input/Output
 Integrated Starter Module
 Liquid Crystal Display
 Leaving Condenser Water
 Leaving Chilled Water
 Light-Emitting Diode
 Overload Trip Amps
 Product Integrated Control (control system)
 Rated Load Amps
 International System of Units of Measurement
 Thermostatic Expansion Valve for oil circuit