Carrier 38E - Manual

HEATING & COOLING
38E,Q
Condensing Units and Heat Pumps
Service Manual
38EH,EN,ES,QH,QN,QS
TABLE OF CONTENTS
Page
INTRODUCTION...................................................... 1,2
Models and SEER Ranges...................................... 1
Factory-Installed Options....................................... 2
SAFETY CONSIDERATIONS ................................... 3
SERVICE.................................................................... 3
Cabinet...................................................................... 3
• REMOVING LOUVERED CASING
• REMOVING FAN ORIFICE
• ELECTRICAL BOX ACCESS
Electrical................................................................. 5-11
• CONTACTORS
• CAPACITORS
• TIME GUARD II
• CRANKCASE HEATER
• PRESSURE SWITCHES
• DEFROST THERMOSTATS ,
• PRINTED-CIRCUIT CONTROL BOARD
• FAN MOTORS
• SERVICE SENTRY CONTROL BOARD
• OUTDOOR THERMOSTATS
Page
Compressor......................... .................................. 12-15
• MECHANICAL FAILURES
• ELECTRICAL FAILURES
• SYSTEM CLEAN-UP AFTER BURN-OUT
• COMPRESSOR REMOVAL AND
REPLACEMENT
Refrigeration System .......................................... 15-20
• REFRIGERATION CYCLE
• LEAK DETECTING
• SERVICE VALVES
• CARRIER COMPATIBLE FITTING
• ACCURATER™ (Bypass type) COMPONENTS
• REVERSING VALVE
• COIL REMOVAL
• COIL CLEANING
• LIQUID LINE STRAINER
• ACCUMULATOR
• SYSTEM CHARGING (for all approved
combinations)
INTRODUCTION
This Service Manual enables a service technician to
.service and repair a family of similar condensing units
and heat pumps. Outwardly, many models appear
Models and SEER Ranges
Table 1 — Condensing Units
similar, however, there are distinct differences. Tables 1
and 2 help to differentiate these differences.
Table 2 — Heat Pumps
MODEL
DIAMETERS SEER*
MODEL
DIAMETERS SEER* CiO.P.t
(in.) (Nominal) (in.) (Nominal) (Minimum)
38EH015 22 9.0 38QH015 22 ■ 9.0 2.85
38EH018 22 9.0 38QH018 22 9.0 2.85
38EH024 22 9.0 38QH024 30 9.0 2.85
38EH030 30 9.0 38QH030 30 9.0 2.85
38EH036 30 9.0 38QH036 30 9.0 2.85
38EH042 30 9,0 38QH042 30 9.0 2.85
38EH048 30 9.0 38QH048 30 9.0 2.85
38EH060 30 9.0 38QH060 39 9.0 2.85
38EN015 17 8.0 38QN015 17 8.0 2.55
38EN018 17 8.0 38QN018 17 8.0 2.55
38EN024 17 8.0 38QN024 22 8.0 2.55
38EN030 22 8.0 38QN030 22 8.0 2.55
38EN036 22 8.0 38QN036 30 8.0 2.55
38EN042 30 8.0 38QN042 30 8.0 2.55
38EN048 30 8.0 38QN048 30 8.0 2.55
38EN060 30 8.0 38QN060 30 8.0 2.55
38ES018 30 10.0 38QS018 30 10.0 2.85
38ES024 30 10.0 38QS024 30 10.0 2.85
38ES030 30 10.0 38QS030 30 10.0 2.85
38ES036 30 10.0 38QS036 30 10.0 2.85
38ES042 30 10.0 38QS042 30 10.0 2.85
38ES048 30 10.0 38QS048 30 10.0 2.85
38ES060 39 10.0 38QS060 39 10.0 2.85
’SEER — Seasonal Energy Efficiency Ratio. The higher the number, the
less electrical power required to reach a given capacity. SEER
is derived by dividing output energy by input energy.
tC.O.P. — Coefficient of Performance (heating), determined by dividing
Btu output by power input required to producethis Btu output.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book |l 1 |4 |4 PC 101 Catalog No. 563-857 Printed in U.S.A. Form 38E.Q-1SM Pgi 11-85 Replaces; New
Tab jsa 5a|2a|5a For replacement items use Carrier Specified Parts.