Carrier 38QB- Manuals

Page 2 - Step 2 — Mount Outdoor Heat Pump

^ Table 1 — Carrier Approve^^6^ Systems OUTDOOR UNIT 38QB REQUIRED OUTDOOR PISTON SIZE INDOOR UNIT MODEL 8i SIZE REQUIRED INDOOR PISTON SIZE 015 38 28HQ.VQ018 40AQ018 46 40DQ018 46* 018 42 28HQ.VQ024 40AQ02440DQ024 52* 28HQ.VQ024 55 40AQ024 55* 024 46 40DQ024 59 28HQ.VQ030 40AQ03040DQ030 61* 28HQ.VQ...

Page 3 - CONCRETE MOUNTING PAD FOR 38QB0I5; - Accessory Mounting Rack; obtain information from loeal Carrier distributor.; Fig. 3 — Refrigerant Line Hangers; OPERATING WEIGHT

I'-O" (305 mm) GRAVEL APRON Г-И" (584mm) DIAM ‘ marker tape (HIDDEN) б" (152 mm) THICK CONCRETE MOUNTING PAD FOR 38QB0I5 2 - 6 " (762mm) DIAM Fig. 2 6 " (152 mm) THICK CONCRETE MOUNTING PAD FOR 38QB0I8-060 - Accessory Mounting Rack condition (Table 2). For requirements beyond 50 ...

Page 4 - Table 3 — Accessories

Table 3 — Accessories PART NO. DESCRIPTION UNIT 38QB 99TZ90040106 Low-Voltage Control — Honeywell Thermostat HH07AT171 and Thermostat Subbase HH93AZ173 — (Automatic Changeover) 99TZ90041106 Low-Voltage Control — Honeywell Thermostat HH07AT171 and Thermostat Subbase HH93AZ175 — (Manual Changeover) Al...

Page 5 - Step 4 — Make Electrical Connections; Do not apply units in system where voltage may; Fig. 4 — Line Power Connections

REPLACE THE ACCURATER™ REFRIGER ANT CONTROL PISTON IN THE INDOOR COIL AS REQUIRED before connecting refriger ant lines. See Table I. Correct piston is supplied with 38QB unit. For piston replacement instructions, see AccuRater Servicing on page 15. CONNECT REFRIGERANT LINES to fittings on unit su...

Page 6 - Accessory Outdoor Thermostat

Table 4 — Electrical Data (60 Hz) UNIT 38QB V/PH OPER VOLTAGE* COMPR FAN FLA BRANCH CIRCUIT Min Wire Size (AWG)t Max \ 'Vire ; 1 Min Gnd Wire Sizel Max Fuse** or HACR Type Ckt Bkr Amps MCA Max Min LRA RLA 015 208-230/1 254 197 34 7 7 1 25 14 40 1 14 15 109 018 208-230/1 254 197 48 124 1 25 14 27 1 u...

Page 7 - Fig. 5 — Control Circuit Connections

THERMOSTAT AND SUBBASE 40AQ OR 40QB FAN COIL COOLING CONTROL KIT TERMINAL BOARD 380B TERMINAL BOARD (38QB/40AQ 0R40QB WITHOUT ELECTRIC HEATER) THERMOSTAT AND SUBBASE 40AQ OR 40QB ELECTRIC HEATER TERMINAL BOARD 38QB TERMINAL BOARD COOLING AND TWO-STAGE HEATING (38QB WITH 40AQ, 40QB,QH OR 40FS/28HQ,VQ...

Page 8 - system operation; LIQUID LINE; Fig. 6 — 38QB Refrigerant Flow Diagrams

MOUNT SUPPLEMENTAL HEAT RELAY in convenient location on indoor unit. Attach with sheet metal screw. To Start Unit — (Make sure crankcase heater has been energized for 24 hours.) Adjust the thermostat as follows: 1. Set selector switch at OFF. 2. Turn on main disconnect switch(es) to indoor and outdo...

Page 9 - Be sure system pressure is 0 psig before; Fig. 7 — Component Location

Table 6 — Service Data Table 7 — Compressor Data (60 Hz) UNIT 38QB 015 018 024 030 036 042 048; 060 R-22CHG (lb) 40 6 2 7 2 7 3 7 8 8 5 8 6 8 0 AccuRator-'-' (Bypass iypo) COOLING CYCLE CHARGING CHART METHOD 1. Operate unit a minimum of 10 minutes be fore checking charge, and after each charge adju...

Page 11 - Charging Chart; Operation Check Chart

(kPa) PRESSURE AT SUCTION SERVICE VALVE Fig. 10 — 38QB018 with 28HQ,VQ024, 40AQ024, or 40DQ024 Cooling Cycle Charging Chart Fig. 12 — 38QB024with 28HQ,VQ024,030, 40AQ024,030 or 40DQ030 Cooling Cycle Charging Chart Fig. 11 — 38QB018 with 28HQ.VQ024, 40AQ024 or 40DQ024 Heating Cycle Operation Check Ch...

Page 17 - vertically; Fig. 27 — Crevice Cleaning Tool

3. Clean coil using vacuum cleaner and its crevice tool (see Fig. 27). Work crevice tool vertically making sure tool only touches dirt on fins. To prevent fin removal, do not “scrub” fins with tool or move tool horizontally. 4. If oil deposits are present, spray coil with house hold detergent (Fant...

Page 18 - TROUBLESHOOTIIMG CHART — COOLING CYCLE

Page 19 - TROUBLESHOOTING CHART — HEATING CYCLE

Page 20 - Tab

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 38QB-7SIM Supersedes 38QB-2SIM Printed in U S A 9-83 PC 101 Catalog No 563-807