Lennox eCOMFORT R32 GAC 035S, Installation, Operating And Maintenance Manual

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Installation manual / eCOMFORT R32-MIL166E-0222 - 09/2022
Minimum ambient
temperature or water outlet
temperature
Ethylene
Glycol %
Pressure drop Water flow Power input
Capacities
Cooling mode Heating mode
From +5ºc to 0ºc
From 0ºc to -5ºc
From -5ºc to -10ºc
From -10ºc to -15ºc
IMPORTANT
If the outside temperature in the area where the eComfort R32 unit is to be installed is likely to drop below 5°C, it is
very important to take the following precautions to avoid that water in the circuit freezing, that may produce damage
to the components.
- If unit has to work under low outside temperatures:
* Do not disconnect power supply in order that water pump starts when detects water temperatures below +5 ºC (only
Hydraulic and Hydronic models).
* If the outside temperature where the system is to be installed or the water outlet temperature is likely to drop below
5ºC, it is very important to use glycol anti-freeze.
The amount of anti-freeze required will vary depending on the minimum ambient temperature or the water outlet
temperature.
When the percentage of glycol increases the standard pump flow decreases, the pressure drop increases and the
cooling and thermal capacities drop. As a result the minimum flow must be multiplied by the coefficient shown in the
table:
Also is advisable to use the option “evaporator anti freeze protection”
Failure to follow this advice, may result in damage to the installation.
Optionally , an immersion heater can be supplied complete with safety thermostat and pressure switch fitted in the
buffer tank of the cooling only chiller. A similar option is available for heat pump versions with the added advantage of a
supplementary heating source (Hydronic version units).
Legislation does not allow refrigerant gas emissions to the atmosphere, so the refrigerants have to be
recycled to avoid being released to the atmosphere.
Those recycled refrigerants shall be processed afterwards by an authorized waste manager.
Those components derived from the recycling of the unit have to be managed by authorized waste manager
or be left in local waste facilities according the local normative in each country.
CAUTION:
Inadequate lubrication: Destruction of bearings and moving parts. Ensure that oil return from the system to the compressor is
adequate at all times. There is no return of liquid refrigerant to the compressor. Liquid refrigerant dilutes oil, could wash oil from
bearings and moving parts, and could cause overheating and compressor failure.
17. Oil circulation through the system must be ensured at all times (compressor oil return, oil balance, refrigerant reflux and oil dilution).
The pipes of the refrigeration system have been designed to guarantee a sufficient velocity of the refrigerant gas, so that the oil returns
to the compressor at all times and in all conditions. The calculation of the diameter of the individual pipes depends on the properties of
the refrigerant, the pressure level, the mass flow rate and the density.
2.- INSTALLATION