Page 1
38EYG 12 SEER Split-System Heat HEATING & COOUNG Pump with Puron® Refrigerant Visit www.carrier.cmn Installation and Start-Up Instructions NOTE: Read entire instruction manual before starting installation. This symbol indicates a change since the last issue. SAFETY CONSIDERATIONS Improper installation, adjustment,...
NOTE: Avoid contact between tubing and structure --OUTDOOR WALL_ INDOOR WAL_ _"CAULK--_ LIQUID TUBE VAPOR TUBE t.--INSULATION THROUGH THE WALL .,_--JOIST HANGER STRAP-- (AROUND VAPOR 3/8"D (953) TIEDOWN INSULATION KNOCKOUTS (2) PLACES TUBE_, #VAPOR TUBE A94199 DIMENSIONS (IN.) TIEDOWN KNOCKOUT MINIMUM r' MIN.
Page 3
SENSING BULB SENSING BULB EQUALIZER 8 O'CLOCK 4 O'CLOCK A00399 Fig. 5--Positioning of Sensing Bulb THERMOSTATIC EXPANSION VALVE and feeder tube going into outdoor coil. At the end of 1 of the feeder tubes, there is a 3/8-in. OD stub tube approximately 3 in.
Page 4
Table 1--Refrigerant Connections and Recommended Liquid Line and Vapor Tube Diameters (In.) TUBE DIAMETER UNIT CONNECTION DIAMETER TUBE DIAMETER (ALTERNATE) SIZE Liquid Vapor Liquid Vapor Vapor 018, 024 5/8, 7/8 5/8, 7/8 042, 048 1-!/8 1- 1/8 NOTES: 1 Tube diameters are for lengths up to 50 ft For tubing iengths greater than 50 ft horizontal and/or 20 ft vertical differential, consutt the Application Guideline and Service Manual -- Residential...
Page 5
Table2--AccessoryUsage REQUIRED FOR LOW-AMBIENT REQUIRED FOR LONG-LINE ACCESSORY APPLICATIONS APPLICATIONS* (BELOW SS°F) (OVER 50 FT) Crankcase Heater Evaporator Freeze Thermostat Compressor Start Assist--Capacitor and Relay Puron® Low-Ambient Pressure Switch Wind Baffle See Low-Ambient Instructions Support Feet Recommended Hard Shutoff Yest Yest See Long-Line Liquid-Line...
Page 6
DISCONNECT PER N.E.C. AND/OR LOCALCODES The unit cabinet must have an uninterrupted or unbroken CONTACTOR ground to minimize personal injury if an electrical fault should occur. The ground consist of electrical wire metal conduit when installed in accordance with existing electrical codes.
Page 8
Speedup Quiet Defrost interval Pins Shift DIP switches A99442 Fig. 14_Defrost Control Should temperature continue to _all, R-W2 is made through ¥.w_ [,-7._lwi=1[o],'1 sec-stage room thermostat bulb. Circuit R-W2 energizes a se- • 3_hase scroll compressors are rotation sensitive. quencer, bringing on first bank of supplemental...
If del,rost themlostat isclosed, speedup pins (J1) m ust beshorted i. Operate unit a minimum minutes before checking by placing a flathead screwdriver in between for5 sec and charge. releasing, toobserve acomplete defi'ost cycle. When t heQuiet 2. Measure liquid service valve pressure by attaching an accurate Shift s witch i sselected,...
Page 10
Table 4_Required Liquid-Line Temperature (°F) REQUIRED SUBCOOLING TEMPERATURE REQUIRED SUBCOOLING TEMPERATURE LIQUID PRESSURE LIQUID PRESSURE (°F) (°F) AT SERVICE VALVE AT SERVICE VALVE...
Page 11
PURON® (R-410A) QUICK REFERENCE GUIDE • Puron® refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment andreptacement components are designed to operate with Puron®. • Puron® refrigerant cylinders are rose colored. • Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400. •...
Page 12
Copyright 2003 CARRIER Corp. • 7310 W. Morris St • Indianapolis, IN 46231 38eyg2si Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. B°°k 1h__ PC 101 catalog 533-80094...