Carrier 38QN User Manual download pdf

HEATING & COOLING

38QN

Heat Pumps—Outdoor Section

Installation and Start-Up Instructions

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 litera

ture and on tags emd labels attached to unit.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for brazing operations. Have

fire extinguisher available. Read these instructions thor

oughly. Consult local building codes and National Electrical

Code (NEC) for special installation requirements.

A WARNING

Before installing or servicing unit, always turn off main

power to system. There may be more than one discon

nect switch. Turn off accessory heater power if applica

ble. Electrical shock can cause personal injury.

INSTALLATION

Step 1—Check Equipment and Jobsite—Install on a sohd,

level mounting pad. It is recommended that unit be

attached to pad using tiedown bolts. Fasten unit to pad

using holes provided in unit mounting feet. See Fig. 1.

AIRFLOW

A86167

A87150

Dimensions (ft-in.)

r-6" AIRFLOW AND

SERVICE CLEARANCE

AROUND UNIT — 12"

ON VALVE SIDE

Model 38QN 015-030 036-048 060

Diameters

1-9’2

2-5\ 3-3

Squares (minimum)

1-11

2-6 3-4

Tiedown Bolt

Locations C

0-6=4

0-9’'2

1-T=16

1-4

1-10^2

2-7

E 0-9V

1-1

1-5^8

Fig. 1—Dimensions, Connections and Mounting Pad (Refer to Tabie 1)

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

Book| 1 I 4

PC 101 Cataiog No. 533-820 Printed in U.S.A. Form 38QN-10Si 10-87 Pg 1 Repiaces: 38QN-9Si

Tab l5al5a

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - Heat Pumps—Outdoor Section

HEATING & COOLING38QNHeat Pumps—Outdoor SectionInstallation and Start-Up InstructionsSAFETY CONSIDERATIONSInstalling and servicing air conditi

Page 2 - A CAUTION

Table 1—Physical DataMODEL 38QN015 018024030 036 042048 060OPER WT (lb)* 132151 155 180 195189 235 270REFRIGERANTControl22AccuRater'^'^ (Byp

Page 3 - Compatible Fitting Repair

Sweat Connection—Use refrigerant grade tubing.1. Remove locking nut, plug, rubber 0-ring and Schrader core and cap from valve service port.2. Cut tu

Page 4

CONNECT GROUND LEAD AND POWER WIRING- Connect ground lead to ground connection in control box for safety. Then connect power wiring. See Fi

Page 5

THERMOSTAT SUBBASE HH93AZIT3 OR HH93AZI7540AQ OR 40QB FAN COIL COOLING CONTROL KIT TERMINAL BOARD38QNTERMINALBOARD(38QN/40AQ 0R40QB WITHOUT ELECTRIC H

Page 6 - HEATING CYCLE CHECK CHARTS

HEATING CYCLE CHECK CHARTSPSIG(kPa)10(69)20(138)30(207)40(276)50(345)60(414)SUCTION PRESSURE AT SERVICE PORTSUCTION PRESSURE AT SERVICE PORTFig. 7—38Q

Page 7

HEATING CYCLE CHECK CHARTS (cont)PRESS. AT SUCT. SERVICE PORT psigFig. 11—38QN036 Heating Cycie Check ChartSUCTION PRESSURE AT SERVICE PORTA87160Fig.

Page 8

To check system operation during heating cycle, use correct Heating Cycle Check Chart (Fig. 7 through 14). These charts indicate whether a

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Carrier 38QN User Manual

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