Carrier 38HQ- Manuals

Page 2 - ik

4-0" OVERHEAD SPACE REQUIRED FOR SERVICE AND AIRFLOW ,M HOLE (OR l|- KO) LIQUID LINE CONN ik -If MTG SLOTS (USE ANY 2 TO BOLT UNIT DOWN) 38HQ OUTDOOR COIL SECTION i DIAM HOLE FOR CONTROL WIRING DRAINAGE HOLES - If DIAM HOLE FOR POWER WIRING SPACE REQUIRED FOR SERVICE E# AIRFLOW Certified dimensi...

Page 3 - Fig. 3 — Refrigerant Line Hangers

Table 3 ^ Carrier-Approved 38HQ Systems INDOOR COMPR OUTDOOR COIL INDOOR FAN COIL INDOOR ACCURATER™ OUTDOOR ACCURATER i MAX HEIGHT (ft) INDOOR UNITS SECTION PISTON PISTON Above Below 38HQ NO. NO. Outdoor Coil 120 940* LL 40FS160 f0AQ030f0AQ036t 28HQ,VQ030t** 28HQ,VQ036** 28HQ,VQ036 59 46 127 940 40A...

Page 4 - Fig. 5 — Mounting the Outdoor Coil

does not obstruct drainage holes (holes drain water during heating and defrost cycles). Attach unit to pad with 1/4-in. mounting bolts. Position tiedown bolts in pad. Any 2 holes in unit basepan may be used to fasten unit to pad. Construct round, 23-in. diameter pad a mihimum of 6 in. above grade to...

Page 6 - Fig. 6 — Refrigerant Piping Connections

REPLACE THE ACCURATER™ REFRIG ERANT CONTROL PISTON IN THE INDOOR AND OUTDOOR COIL AS REQUIRED before connecting refrigerant lines. See Table 3 and the notes under the table for the pistons used in the different system combinations. For piston replacement instructions, see AccuRater Servicing on pa...

Page 7 - separate discon

Fig. 7 — Accessory Coupler Sweat Connection to Compatible Fitting (Use refrigerant grade tubing.) 1. Remove locking nut, rubber O-ring and Schrader core from valve. 2. Cut tubing to correct length. 3. Insert tube into Compatible Fitting. Wrap top and bottom of service valves in wet cloth to prevent ...

Page 8 - Accessory Outdoor Thermostat; Fig. 8 — Line Power Connections

CONNECT GROUND LEADS AND POWER WIRING Connect ground leads to the ground lug in control box for safety. Connect power wiring. See Fig. 8. Splice compressor section line power leads to yellow and black pigtails, and outdoor coil power leads to brown and blue pigtails. Use wire nuts and tape each conn...

Page 9 - Fig. 9 — Control Circuit Connections

THERMOSTAT 40AQ OR 40QB FAN COIL 38HQ SUBBASE COOLING CONTROL COMPRESSOR HH93AZ073 OR KIT SECTION HH93AZ075 TERMINAL BOARD TERMINAL BOARD COOLING AND ONE-STAGE HEATING (38HQ/40AQ OR 40QB WITHOUT ELECTRIC HEATER) A THERMOSTAT 40AQ, 40QB OR 40FQ 38HQ SUBBASE ELECTRIC HEATER COMPRESSOR HH93AZ073 0R TER...

Page 10 - system operation; Table 8 — Service Data

SERVICE ’■Refrigerant Charging — The 38HQ940 outdoor coil contains a factory charge of 7.1 lb of R-22; the 38HQ960 outdoor coil contains a factory charge of 10.0 lb. This charge is correct for all systems except those listed in Table 7. When the amount of refrig erant shown in Table 7 is added, the...

Page 11 - REFRIGERANT CHARGING AND CHECK CHARTS

REFRIGERANT CHARGING AND CHECK CHARTS r. Fig. 10 — 38HQ120/38HQ940 with 40AQ030 or 28HQ.VQ030 Cooling Cycle Charging Chart (R-22) Fig. 12 — 38HQ127/38HQ940 with 40AQ030 or 28HQ,VQ030 or 40DQ030 Cooling Cycle Charging Chart (R-22) Fig. 11 — 38HQ120/38HQ940 with 40AQ036 or 28HQ,VQ036 or 40FS160/28HQ.V...

Page 12 - 8HQ,VQ036 Cooling Cycle Charging Chart; Cooling Cycle Charging Chart; I W; T r; Operation Check Chart

Fig. 14 — 38HQ134/38HQ940 with 40AQ036 or 28HQ,VQ036 or 40FS160/ 28HQ,VQ036 Cooling Cycle Charging Chart SUCTION PRESSURE AT COMPRESSOR SERVICE PORT (PSI6) Fig. 16 — 38HQ146/38HQ960 with 28HQ,VQ048 or 40FS200/28HQ.VQ048 or 40FS220/28HQ,VQ048 or 40QB048 Cooling Cycle Charging Chart 320r SUCTION PRESS...

Page 14 - Fig, 24 — Component Location

Fig. 22 — 38HQ140/38HQ960 with 28HQ,VQ042 or 40FS160/28HQ.VQ042 or 40FS200/28HQ,VQ042 or 40QB042 Heating Cycle Operation Check Chart Fig. 23 — 38HQ146/38HQ960 with 28HQ,VQ048 or 40FS200/28HQ,VQ048 or 40FS220/28HQ.VQ048 or 40QB048 Heating Cycle Operation Check Chart VAPOR LINE CONNECTIONS RUN CAPACIT...

Page 18 - TROUBLESHOOTING CHART — COOLING CYCLE

Page 19 - TROUBLESHOOTING CHART — HEATING CYCLE

Page 20 - Tab

( i K For replacement items use Carrier Specified Parts. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 Tab 5a 5a Form 38HQ-10SI Supersedes 38HQ-8SI Printed in U S A 783 7-81 PC 101 CatalogNo...