Installation manual

38GL_M…G / 38YY(S)_M…G
Cooling only and heat pump multisplit system outdoor units
ENGLISH
GB - 1
For operation and maintenance instructions of this unit as well as installation
instructions of the indoor unit, refer to the relevant manuals.
Contents Page
Dimensions and weight ................................................................................................................. 2
Minimum clearances and connections ......................................................................................... 3
Connections .................................................................................................................................. 4
Operating limits and system charge ............................................................................................. 5
General information....................................................................................................................... 6
Warnings: avoid............................................................................................................................. 7
Refrigerant connections ................................................................................................................ 8/10
Electrical connections ................................................................................................................... 11/16
Electrical data ................................................................................................................................16
Pump down and check the refrigerant charge .............................................................................. 17/18
Unit maintenance and troubleshooting ......................................................................................... 19
Diagnostics and testing ................................................................................................................. 20
Accessories ................................................................................................................................... 20
R-410A – QUICK REFERENCE GUIDE
• R-410A refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing
equipment and replacement components are designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A refrigerant cylinders have a dip tube which allows liquid to flow out of cylinder in an
upright position.
• In case of maintenance, R-410A systems should be charged with refrigerant in liquid phase.
Use a commercial type metering device in the manifold hose in order to vaporize the liquid
refrigerant before it enters in the unit.
• R-410A, as other HFCs, is only compatible with oils selected by the compressor manufacturer.
• A vacuum pump is not enough to remove moisture from oil.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• Never open system to atmosphere while it is under vacuum.
• When the system must be opened for service, break vacuum with dry nitrogen and replace filter
driers.
• Do not vent R-410A into the atmosphere.
• Use only Carrier matching indoor units (Table I).
Quantity CC
Models Oil type
Compressor A Compressor B
38GL2M12G PVE 500 ---
38GL2M18G PVE 620 620
38GL2M24G PVE 670 670
38GL2M36G HSPOE 1200 1200
38GL2M48G HSPOE 1400 1400
38GL3M21G PVE 500 1400
38GL4M24G PVE 630 630
38YY2M18G PVE 500 500
38YY2M21G PVE 500 670
38YY2M24G PVE 670 670
38YY(S)2M36G HSPOE 1200 1200
38YY(S)2M48G HSPOE 1400 1400