Carrier 38AKS028-044 Installation, Start-up And Service Instructions Manual

Contents

Placing Unit — There must be 4 ft (1220 mm) for ser-vice on all sides of unit, and a minimum of 8 ft (2440 mm)clear air space above unit. For multiple units, allow 8 ft(2440 mm) separation between units for airflow and service.Mounting Unit — When unit is in proper location, useof mounting holes in base rails is recommended for securingunit to supporting structure or for mounting unit on vibra-tion isolators, if required. Fasteners for mounting unit arefield supplied. Be sure to mount unit level to ensure properoil return to compressors.Compressor Mounting — As shipped, compressoris held down by 4 bolts. After unit is installed loosen eachbolt using nut indicated in Fig. 3 until flatwasher ( 3⁄8 in.[9.5 mm]) can be moved with finger pressure.INSTALLATIONRefrigerant Piping Connections — Line sizes de-pend on length of piping required between condensing unitand evaporator. See Table 2A or 2B. It is important to con-sider liquid lift and compressor oil return. Refer to Part 3 ofCarrier System Design Manual for line sizing information,and Fig. 4 for recommended piping details.Liquid Line Solenoid Drop Control — The factory-supplied solenoid valve must be installed at the indoor unit(fan coil) per Fig. 5, and wired per wiring label found onunit. The solenoid assures that system refrigerant is in thehigh-pressure side (condenser and liquid line) of the systemduring the off cycle. Refrigerant migration is minimized.Factory-supplied liquid line solenoid valve connecting sizesare 7⁄ 8-in. (22.2 mm) ODF for inlet and 7⁄ 8-in. (22.2 mm)ODM for outlet.Failure to properly install liquid line solenoid at the in-door unit as described, without Carrier authorization, mayVOID warranty.Filter Drier and Moisture Indicator — Every unitshould have a filter drier and a sight glass (moisture indi-cator) field installed. Select the filter drier for maximum unitcapacity and minimum pressure drop. Figure 5 shows rec-ommended locations of filter drier(s) and sight glass. Com-plete the refrigerant piping from the evaporator to the con-denser before opening the liquid and suction lines at thecondensing unit. One filter drier may be installed at locationA in Fig. 5, or 2 filter driers may be installed at locations B.Fig. 1 — 38AKS UnitsNOTES:1. Use 2 in. OD (50 mm) pipe or hooks in lifting holes.2. Rig with 4 cables and spread with 2 ‘‘D’’ long and two ‘‘A’’ long2 x 4’s in. (50 x 100 mm) or equal.3. Run the rigging cables to a central suspension point so that theangle from the horizontal is not less than 45 degrees.All panels must be in place when rigging.UNIT38AKSMAX SHIP.WTLIFTINGHOLES‘‘A’’CENTER OF GRAVITY ‘‘D’’‘‘B’’ ‘‘C’’Lb Kg in. mm in. mm in. mm in. mm028 1924 872 81 2057 43.0 1092 28.0 711 73.5 1867034 2115 960 81 2057 43.0 1092 28.0 711 73.5 1867044 2797 1207 99 2515 49.0 1245 30.5 775 73.5 1867Fig. 2 — Rigging with Spreader Bars(Field Supplied)3