Table of Contents
Advertisement
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Step 2 - Rig and Mount the Unit . . . . . . . . . . . . . 6
Step 4 - Install Accessories . . . . . . . . . . . . . . . . . 7
Step 5 - Complete Electrical Connections . . . . 7
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Evacuate and Dehydrate . . . . . . . . . . . . . . . . . . . . . . 9
Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Turn On Crankcase Heaters . . . . . . . . . . . . . . . . . . 9
Add Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . 9
Before Starting Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 9
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-13
To Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Check Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATING SEQUENCE . . . . . . . . . . . . . . . . . . . . 13
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Fan Cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Winter Start Control . . . . . . . . . . . . . . . . . . . . . . . . . 13
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,14
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . 13
Time Guard II Circuit . . . . . . . . . . . . . . . . . . . . . . . 13
Winter Start Control . . . . . . . . . . . . . . . . . . . . . . . . . 13
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Outdoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cleaning Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 15,16
START-UP CHECKLIST . . . . . . . . . . . . . . . . CL-1,CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equip-
ment can be hazardous due to system pressures, electrical
components, and equipment location (roofs, elevated struc-
tures, etc.).
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 111
Tab
3a 2a
Installation, Start-Up and
Service Instructions
Page
Catalog No. 563-746
Printed in U.S.A.
38AE012,014,016
Air-Cooled Condensing Units
Only trained, qualified installers and service mechanics
should install, start-up, and service this equipment (Fig. 1).
Untrained personnel can perform basic maintenance func-
tions such as cleaning coils. All other operations should be
performed by trained service personnel.
When working on the equipment, observe precautions in
the literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work gloves.
Keep quenching cloth and fire extinguisher nearby when
brazing. Use care in handling, rigging and setting bulky
equipment.
ELECTRIC SHOCK HAZARD
Separate power sources (main and control
power circuits) are used for these units. Be
sure both main and control power circuits are
disconnected before servicing.
INSTALLATION
Step 1 - Complete Pre-Installation Checks
UNCRATE UNIT - Remove unit packaging except for the
top skid assembly, which should be left in place until after
the unit is rigged into its final location.
INSPECT SHIPMENT - File claim with shipping com-
pany if shipment is damaged or incomplete.
CONSIDER SYSTEM REQUIREMENTS
• Consult local building codes and National Electrical Code
(NEC, U.S.A.) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring, re-
frigerant piping, and servicing unit. See Fig. 1. See
Fig. 2 for unit component locations.
• Locate unit so that outdoor coil (condenser) airflow is un-
restricted on all sides and above.
• Unit may be mounted on a level pad directly on the base
channels or mounted on raised pads at support points. See
Table 1A-1D for unit operating weights. See Table 2 for
weight distribution based on recommended support points.
NOTE: If vibration isolators are required for a particular
installation, use the data in Table 2 to make the proper
selection.
Form 38A-4SI
Pg 1
38AKS024
50/60 Hz
4-94
Replaces: 38AE-17SI
Advertisement
Table of Contents
Related Manuals for Carrier 38AE012
Summary of Contents for Carrier 38AE012
-
Page 1: Table Of Contents
NOTE: If vibration isolators are required for a particular installation, use the data in Table 2 to make the proper selection. Printed in U.S.A. Form 38A-4SI Pg 1 38AE012,014,016 38AKS024 50/60 Hz 4-94 Replaces: 38AE-17SI... - Page 2 A — 1 ⁄ -in. (32) diameter knockout for B — 1 ⁄ -in. (44.5) diameter knockout for suction line connections of 1 (38AE012), 1 ⁄ in. (35) (38AE014,016), 1 C — ⁄ -in. (22.2) diameter knockout for control power D —...
- Page 3 1 — Low-Voltage Fuse 5 — No. 2 Fan 2 — No. 1 Fan 6 — Terminal Block 1 (Unit Power) 3 — High-Pressure Switch 7 — Terminal Block 2 (Control Power) 4 — Circuit Breakers 8 — Wraparound Coil Fig.
- Page 4 PIPING CONNECTIONS (in. ODM) Suction Liquid Unit is factory supplied with holding charge only. †Storage capacity is measured at liquid saturated temperatures of 125 F for 38AE012, 123 F for 38AE014, and 130 F for 38AE016 and 38AKS024. UNIT OPERATING WEIGHT (kg)
- Page 5 PIPING CONNECTIONS (in. ODM) Suction Liquid *Unit is factory supplied with holding charge only. †Storage capacity is measured at liquid saturated temperatures of 125 F for 38AE012, 123 F for 38AE014, and 130 F for 38AE016 and 38AKS024. UNIT OPERATING WEIGHT (kg)
-
Page 6: Step 2 - Rig And Mount The Unit
(evaporator), the amount of liquid lift, and compressor oil return. See Tables 3, 4A, and 4B and also refer to Part 3 of Carrier System Design Manual for design details and line sizing. Refer to indoor installation instructions for addi- tional information. -
Page 7: Step 4 - Install Accessories
INSTALL FILTER DRIER(S) AND MOISTURE INDICA- TOR(S) — Every unit should have a filter drier and liquid- moisture indicator (sight glass). In some applications, depending on space and convenience requirements, it may be desirable to install 2 filter driers and sight glasses. One filter drier and sight glass may be installed at A locations in Fig. - Page 8 Volts UNIT Model Nameplate 208-230 38AE012 208-230 38AE014 208-230 38AE016 208-230 38AKS024 Volts UNIT Model Supplied* Nameplate 38AE012 38AE014 38AE016 38AKS024 LEGEND — Full Load Amps (Fan Motors) — Maximum Instantaneous Current Flow during start-up (LRA of compressor plus total FLA of fan motors) —...
-
Page 9: Pre-Start-Up
PRE-START-UP Evacuate and Dehydrate the entire refrigerant sys- tem by either of the methods described in Carrier Standard Service Techniques Manual, Chapter 1. Leak Test the entire refrigerant system by the pres- sure method described in Carrier Standard Service Tech- niques Manual, Chapter 1. -
Page 13: Check Operation
Check Operation — Verify operation of all safety con- trols. Replace all service panels. Be sure that control panel cover is closed tightly. OPERATING SEQUENCE Cooling — When the first stage (TC1) of the cooling ther- mostat closes, the timer starts. After approximately 3 sec- onds, the timer activates the compressor and fan motor no. -
Page 14: Outdoor Fan
Fins are not continuous through coil sections; dirt and debris may pass through first section, become trapped between the 2 rows of fins (38AE012) or 3 rows of fins (38AE014,016, 38AKS024) and restrict outdoor airflow. Use a flashlight to determine if dirt or debris has collected be- tween coil sections. -
Page 15: Troubleshooting
PROBLEM COMPRESSOR DOES NOT RUN Contactor Open 1. Power off. 2. Fuses blown in field power circuit. 3. No control power. 4. Thermostat circuit open. 5. Time Guard II device not operating. 6. Compressor circuit breaker tripped. 7. Safety device lock-out circuit active. 8. - Page 16 PROBLEM COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH (cont) Airflow Restricted 1. Coil iced up. 2. Coil dirty. 3. Air filters dirty. 4. Dampers closed. Indoor-Air Fan Stopped 1. Electrical connections loose. 2. Fan relay defective. 3. Motor overload open. 4. Motor defective. 5.
- Page 18 For a free Service Training Material Catalog (STM), call 1-800-962-9212. Ordering instructions are included. Copyright 1994 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 111 Catalog No.
-
Page 19: Start-Up Checklist
A. Preliminary Information OUTDOOR: MODEL NO. INDOOR: AIR HANDLER MANUFACTURER MODEL NO. ADDITIONAL ACCESSORIES B. Pre-Start-Up OUTDOOR UNIT IS THERE ANY SHIPPING DAMAGE? IF SO, WHERE: WILL THIS DAMAGE PREVENT UNIT START-UP? CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT? HAS THE GROUND WIRE BEEN CONNECTED? HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? - Page 20 CHECK THE COMPRESSOR OIL LEVEL SIGHT GLASSES; ARE THE SIGHT GLASSES SHOWING OIL LEVEL IN VIEW? (Y/N) NOTES: Copyright 1994 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 111 Catalog No.
Need help?
Do you have a question about the 38AE012 and is the answer not in the manual?
Questions and answers