Advertisement
Quick Links
INSTALLATION AND MAINTENANCE
Split System Air Conditioner
The equipment covered in this manual is to be installed by trained and experienced
service and installation technicians. Improper installation, modification, service, or
use can cause electrical shock, fire, explosion, or other conditions which may cause
personal injury, death, or property damage. Use appropriate safety gear including
safety glasses and gloves when installing this equipment.
WARNING
Risk of electrical shock. Disconnect all
remote power supplies before installing or
servicing any portion of the system. Failure
to disconnect power supplies can result in
property damage, personal injury, or death.
WARNING
Installation and servicing of air conditioning
equipment can be hazardous due to internal
refrigerant pressure and live electrical com-
ponents. Only trained and qualified service
personnel should install or service this equip-
ment. Installation and service performed by
unqualified persons can result in property
damage, personal injury, or death.
WARNING
Sharp metal edges can cause injury. When
installing the unit, use care to avoid sharp
edges.
506253-01
INSTRUCTIONS
4SCU16LT Series
WARNING
Save these instructions for future reference
Issue 0912
TABLE OF CONTENTS
INSTALLATION ...................................... 2
START-UP ............................................ 12
OPERATION ........................................ 16
MAINTENANCE ................................... 20
CONNECTION DIAGRAM ................... 22
WARRANTY ......................................... 23
Manufactured By
Allied Air Enterprises Inc.
A Lennox International Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
*48442L005*
Page 1
Advertisement
Related Manuals for Allied Air 4SCU16LT Series
Summary of Contents for Allied Air 4SCU16LT Series
-
Page 1: Table Of Contents
Installation and service performed by unqualified persons can result in property Manufactured By damage, personal injury, or death. Allied Air Enterprises Inc. A Lennox International Inc. Company 215 Metropolitan Drive West Columbia, SC 29170 WARNING *48442L005* Sharp metal edges can cause injury. -
Page 2: Installation
INSTALLATION Inspection of Shipment Upon receipt of equipment, carefully inspect it for possible General shipping damage. If damage is found, it should be noted Read this entire instruction manual, as well as the on the carrier’s freight bill. Take special care to examine instructions supplied in separate equipment, before the unit inside the carton if the carton is damaged. - Page 3 Thermostat Designations Slab Mounting Thermostat Indoor Unit Outdoor Unit Discharge Air Power Building Structure Heat Cooling Indoor Blower Mounting Slab See unit wiring diagram for power supply connections. If the indoor unit is not equipped with a blower relay, Ground Level one must be field supplied and installed.
- Page 4 Select line set diameters from Table 2 to ensure that oil return to the compressor. Size vertical suction riser to maintain WARNING minimum velocity at minimum capacity. Recommended line Polyolester (POE) oils used with R-410A refrigerant length is 50’ or less. If more than 50’ line set is required, absorb moisture very quickly.
- Page 5 copper-to-brass or copper-to-steel brazing) which are rated for use with R410A refrigerant. Outside Unit Placement and Installation 4. Remove the Schrader core assemblies before brazing to protect them from damage due to extreme heat. Replace the cores when brazing is complete. Install unit away from windows 5.
- Page 6 Refrigerant Line Sets: Transition from Vertical to Horizontal Automotive Anchored Muffler-Type Heavy Nylon Hanger Wire Tie Strap Liquid Strap Liquid Line to Vapor Line to Vapor Line Wall Wall Line Stud Stud Liquid Line Liquid Line – Vapor Line Wrapped –...
- Page 7 Flushing Existing Line Set and Indoor Coil Flushing Procedure This procedure should not be performed on systems IMPORTANT: The line set and/or indoor coil must be which contain contaminants, such as compressor flushed with at least the same amount of refrigerant that burn out.
- Page 8 (It may be necessary to bypass the low pressure 9. Close the valve on the inverted R22 cylinder and the switches to ensure complete refrigerant evacuation.) gauge set valves. Pump the remaining refrigerant out of the recovery machine and turn the machine off. When the low side system pressures reach 0 psig, close the suction line valve.
- Page 9 Metering Device Installation Service Valve Valve Closed Figure 9 Manifold Gauge Set Manifold gauge sets used with systems charged with R410A refrigerant must be capable of handling the higher system operating pressures. The gauges should be rated for use with pressures 0 – 800 on the high side and a low side of 30"...
- Page 10 2. With both manifold valves closed, connect the cylin- der of R410A refrigerant. Open the valve on the Ball Type Service Valve R410A cylinder (vapor only). (Valve Open) 3. Open the high pressure side of the manifold to allow R410A into the line set and indoor unit. Weigh in a trace amount of R410A.
- Page 11 2. Connect micron gauge. 3. Connect the vacuum pump (with vacuum gauge) to the center port of the manifold gauge set. 4. Open both manifold valves and start vacuum pump. 5. Evacuate the line set and indoor unit to a minimum of 500 microns or lower.
-
Page 12: Start-Up
START-UP Refrigerant Charge Adjustment CAUTION If unit is equipped with a crankcase heater, it should be energized 24 hours before unit . t f start-up to prevent compressor damage as a result of slugging. * If line length is greater than 15 ft., add this amount. If line length is less than 15 ft., remove this amount. - Page 13 2. Close manifold gauge set valves. Connect the center manifold hose to an upright cylinder of R410A. Blocking Outdoor Coil Outdoor coil should be 3. If room temperature is below 70°F, set the room thermo- blocked one side at a time stat to call for heat.
- Page 14 R410A Temperature/Pressure Chart Subcooling Values F ° F ° F ° F ° Table 6 _____ ° Liquid Line Temperature °F – _____ ° Outdoor Ambient Temperature °F _____ ° Approach Temperature °F 6. Compare the approach value with those shown in Table 7.
- Page 15 Normal Operating Pressures F ° F ° F ° F ° F ° F ° F ° F ° F ° F ° F ° F ° L = Liquid S = Suction Values provided above are typical pressures. Indoor unit matchup, indoor air quality, and indoor load will cause pressures to vary.
-
Page 16: Operation
OPERATION Thermostat Demand Wiring Outdoor unit and indoor blower cycle on demand from the The diagnostic module requires a thermostat demand room thermostat. When the thermostat blower switch is signal to operate properly. The thermostat demand signal moved to the ON position, the indoor blower operates input, labeled Y on the module, should always be con- continuously. - Page 17 Flash Codes c t i e l i l i o t i c u l i e e e e e l i o o l l f r i l i o l i f y t l l l a i f / c i f...
- Page 18 Flash Codes (cont.) i t c o l l c t i c t i y l f t i c e l i n i l l i t y t i o l l q i l l l i t i n c r i t i u...
- Page 19 Miswired Module Troubleshooting y f i . s l y f i y f i . l i y f i s l i s l l . f f y f i e i l h t i a l f y f i .
-
Page 20: Maintenance
MAINTENANCE 4. Check all wiring for loose connections. 5. Check for correct voltage at unit (with unit operating). WARNING 6. Check amp-draw on blower motor. Before performing maintenance operations on system, turn the electric power to unit OFF at Unit nameplate _________ Actual _________ disconnect switch(es). - Page 21 Start-Up and Performance Checklist Job Name _______________________________ Job No. ________________ Date ______________ Job Location _____________________________ City ___________________ State ______________ Installer _________________________________ City ___________________ State ______________ Unit Model No. ______________ Serial No. ___________________ Service Technician ________________________________________ Nameplate Voltage ______________ Rated Load Ampacity ________ Compressor _______________ Outdoor Fan ___________________ Maximum Fuse or Circuit Breaker ________________________...
-
Page 22: Connection Diagram
LT BLUE OUTDOOR DUAL CAPACITOR PURPLE TO 24 VAC BLACK POWER SOURCE 20 VA MINIMUM ORANGE NEC CLASS 2 YELLOW BLUE BLACK COMPRESSOR CRANKCASE HEATER (IF USED) GROUND 208-230/60/1 GROUND BLACK S4 HIGH S24 LOSS K1-1 PRESSURE A132 OF CHARGE SWITCH SWITCH 208-230/60/1... -
Page 23: Warranty
All covered heat exchangers are warranted by Allied Air for a period of twenty (20) years from the date of original installation. Heat Exchanger Availability: If a replacement heat exchanger is no longer available for a unit covered by this warranty, Allied Air will allow a credit toward the purchase of an equivalent Allied Air furnace (at the current suggested distributor’s cost). - Page 24 LIMITED EXTENDED PARTS WARRANTY Allied Air Enterprises, Inc. (“Allied”) provides its air conditioning and heating products with a standard five-year parts warranty. This limited extended parts warranty is in addition to and is intended to supplement Allied’s standard 5-year parts warranty. As such, this limited extended warranty provides for a total of 10-years of limited warranty coverage (Standard 5-Year Limited Parts Warranty plus Additional 5-Year Limited Extended Parts warranty).
Need help?
Do you have a question about the 4SCU16LT Series and is the answer not in the manual?
Questions and answers