Commissioning And Operation; Steps To Follow For Commissioning The Units - Lennox eCOMFORT R32 GAC 035S Installation, Operating And Maintenance Manual

3.- COMMISSIONING AND OPERATION

LENNOX REFAC, S.A. Designs and develops its machines always looking for the greater comfort and well-being of its customers and
users, at the same time as the greater energy efficiency of the elements that constitute the units. This effort would be fruitless if it was
not united to a responsible use of these equipment. For this reason, we invite you to use these machines in a responsible way with the
environment, combining the adequate comfort, with a responsible consumption of the energy resources.
WARNING: Diesel Effect: System explosion. The mixture of air and oil at high temperature can lead to an
explosion. Avoid operating with air.
WARNING: Air mixture - R32 refrigerant in a potentially flammable atmosphere: Fire hazard.
Make sure that the atmosphere is non-flammable before starting a unit charged with R32 refrigerant (eg after
filling, repair or maintenance) and that the system contains only refrigerant.
IMPORTANT: Oil dilution: bearing malfunction. It is important to ensure that new compressors are not subject to
fluid abuse. It is mandatory to have a crankcase heater installed if the refrigerant charge exceeds the charge limits
indicated in the supplier's tables. It is recommended to turn on the crankcase heater 12 hours before starting the
compressor.

3.1.- STEPS TO FOLLOW FOR COMMISSIONING THE UNITS

PRELIMINARY CHECKING
Before starting up the unit, the following points should be checked:
1.- Check that the voltage coincides with that indicated on the characteristics plate.
2.- Check that the wired remote control is connected according to the electrical diagram (if it is included).
3.- Make sure that the water connections to the unit (inlet and outlet) are correct and have not been changed, since the flow switch
will not work if the connections are exchanged. Check that the water circuits are connected to the heat exchangers (eg no reversal
between evaporator and condenser or between water inlets and outlets). The water circulation pump will preferably be installed
upstream so that the evaporator / condenser is subjected to positive pressure. Input and output connections are indicated on the
certified drawing shipped with the unit or shown in the catalogue. The use of a filter in the water circuit located upstream of the heat
exchanger is mandatory. These filters must remove all particles with a diameter greater than 1 mm and must be placed a maximum of
1 meter from the exchanger inlet.
4.- Check that the main switch is "ON".
5.- The compressor must not be started before the crankcase heater has acted for at least 8 hours.
- It incorporates an electrical resistance, to ensure the separation between the refrigerant fluid and the oil in the crankcase, which works
when the compressor stops and stops working when the compressor starts.
- About eight hours before starting up or after a prolonged stoppage of the unit, you must power up the unit and turn the switch ON for
said resistance to act.
- The compressor starts some time after the water pump has been started.
6.- Check the direction of rotation of the water pump.
7.- Check if there is air in the water circuit. Purge if necessary.
8.- Check that the fan rotates freely.
9.- Ensure the tightness in the refrigeration circuit.
WARNING: High pressure: Personal injury. Consider personal safety requirements and check test pressures prior
to testing.
Use only dry inert gases (for example: nitrogen) for leak testing. Do not use other industrial gases and never add
refrigerant to the test gas (as a leak indicator).
10.- Specify the details of the installation with the installer, verifying:
- Absence of explosive atmosphere or flammable gas in the environment.
- Adequate ventilation according to the volume of the room and the refrigerant charge.
- Visual control of electricity (wiring, fuses,...).
- Cable glands in good condition, all electrical connections well connected and terminal box closed to guarantee the corresponding IP
protection.
- Visual inspection of the unit in search of leaks, components and loose cables in the electrical installation,...
- Functional test of high and low pressure switches and any pressure actuated valves.
- Setting and operation of all safety functions and protection devices.
- Valves in the correct operating position.
- Pressure gauges and compounds installed.
- Correct charge with refrigerant.
- Location and position of the electrical auxiliary switch of the compressor.
Installation manual / eCOMFORT R32-MIL166E-0222 - 09/2022 • 69 •