• Home
• Brands
• Carrier Manuals
• Carrier 38BK-018
• Carrier 40QNB018 Installation, Start-up And Service Instructions Manual

Carrier 40QNB018 Installation, Start-up And Service Instructions Manual

Download Installation, start-up and service instructions manual of Carrier 38BK-018 Air Conditioner, Computer Hardware for Free or View it Online on All-Guides.com. This version of Carrier 38BK-018 Manual compatible with such list of devices, as: 38BK-024, 38HDC018, 38HDC024, 38HDS024 Series, 53QNB024

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Installation, Start-Up

and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS ....................1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Step 1 − Complete Pre-Installation Checks ....2

• UNPACK UNIT

• INSPECT SHIPMENT

Step 2 − Select Location .....................2

Step 3 − Mount Mounting Bracket on Wall ....4

Step 4 − Connect Refrigerant Piping .........5

Step 5 − Connect Condensate Drain Line .....7

Step 6 − Make Electrical Connections ........7

Step 7 − Make Connections to Outdoor Unit ..9

• COOLING-ONLY SYSTEMS

• HEAT PUMP SYSTEMS

Step 8 − Install Fan Coil Unit Onto Mounting

Bracket .....................................9

START-UP .................................9-12

40QN Control System . . . . . . . . . . . . . . . . . . . . . . . 10

After Extended Shutdowns . . . . . . . . . . . . . . . . . . 10

Seasonal Changeovers . . . . . . . . . . . . . . . . . . . . . . 10

To Turn The Unit On and Off . . . . . . . . . . . . . . . . . 10

Adjusting Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operating Mode Memory . . . . . . . . . . . . . . . . . . . . 10

Automatic Operation (Auto) Mode ............11

Operating Fault Diagnosis ...................11

Microprocessor Control Operation ...........11

CLEANING AND MAINTENANCE ............12-14

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

To Install or Replace Remote Controller

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

To Set the Current Time . . . . . . . . . . . . . . . . . . . . . 13

To Remove and Clean or Replace Air Filters . . 13

• TO REMOVE AIR FILTERS

• TO CLEAN OR REPLACE FILTERS

To Clean Indoor Unit Front Panel . . . . . . . . . . . . 13

To Clean Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . 13

To Clean Outdoor Coil (Outdoor Unit) . . . . . . . . 14

To Clean Condensate Drains . . . . . . . . . . . . . . . . . 14

SERVICE ..................................14,15

Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

System Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

• THERMISTOR TESTS

• COMPRESSOR FAILURE

• REVERSING VALVE FAILURE (38BK Only)

System Safeties and Interlocks . . . . . . . . . . . . . . 15

• INDOOR FAN FAILURE

• COMPRESSOR SHORT-CYCLING PROTECTION

• INDOOR COIL FREEZE PROTECTION (Cooling or

Dehumidification Mode Only)

• INDOOR COIL HIGH-TEMPERATURE

PROTECTION (Heat Pump Systems Only)

TROUBLESHOOTING ......................15-18

START-UP CHECKLIST ....................CL-1

SAFETY CONSIDERATIONS

Installing and servicing air-conditioning equipment can be

hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install or service air-conditioning equipment.

Untrained personnel can perform basic maintenance, such

as cleaning and replacing filters. All other operations should

be performed by trained service personnel. When working

on air conditioning equipment, observe precautions in lit-

erature and on tags and labels attached to unit.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloth for brazing operations. Have fire ex-

tinguisher available. Read these instructions thoroughly. Con-

sult local building codes and National Electrical Code (NEC)

for special installation requirements.

Before installing or servicing system, always turn off

main power to system. There may be more than one dis-

connect switch. Turn off indoor fan coil power if ap-

plicable. Electrical shock can cause personal injury.

GENERAL

The new Carrier 40QNE heat pump high wall fan coil units

(Fig. 1) DO NOT have electric heaters. These new heat pump

fan coil units have been specifically designed to improve sys-

tem efficiency in both heating and cooling modes when matched

with a 38BK outdoor heat pump unit. If your application

requires heating, heat pump units must be used, both out-

doors and indoors. See Table 1 for recommended system

combinations.

Fig. 1 — 40QN High Wall Fan Coil Unit

40QNB/QNE

018,024

High Wall Fan Coil Units

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4

Tab 3e 2f

PC 111 Catalog No. 534-078 Printed in U.S.A. Form 40QN-1SI Pg 1 4-96 Replaces: New