Carrier 38GL2M36G - R-410 A Quick Reference Guide

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 ..................................................................................................................... 3
Connections .................................................................................................................................. 3/5
Operating limits ............................................................................................................................. 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.
• The R-410A, as for other HFC, is only compatible with oils chosen by the compressor
manufacturer. For this reason, for the type of oil to be used, always refer to the plate on the
compressor and the unit.
• 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).