Armstrong Air 4SCU 16 LS Series Installation Instructions Manual Download Page 22

Page: 22 / 23

507607-03

Issue 1827

Page 22 of 23

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 Amperage: _________________ Outdoor Fan: _____________________

Maximum Fuse or Circuit Breaker: ____________________________

Electrical Connections Tight?

Indoor Filter Clean?

Supply Voltage (Unit Off): __________________________

Indoor Blower RPM: ______________________________________

S.P. Drop Over Indoor (Dry): ________________________

Outdoor Coil Entering Air Temperature: _______________________

Voltage with Compressor Operating: ___________________

Discharge Pressure: ______________________________________

Vapor Pressure: ___________________________________

Refrigerant Charge Checked?

Outdoor Fan Checked?

Refrigerant Lines:

Leak Checked?

Properly Insulated?

Service Valves:

Fully Opened?

Caps Tight?

Thermostat:

Calibrated?

Properly Set?

Level?

Summary of Contents for 4SCU 16 LS Series

Page 1: ...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 sup...

Page 2: ...lbs Service Port Caps 8 ft lbs Sheet Metal Screws 16 in lbs 8 Machine Screws 16 in lbs 10 Machine Screws 28 in lbs Compressor Bolts 90 in lbs Inspection of Shipment Upon receipt of equipment carefull...

Page 3: ...it properly can result in personal injury or death WARNING Line voltage is present at all components when unit is not in operation on units with single pole contactors Disconnect all remote electric p...

Page 4: ...to terminal C Single wire to terminal C Unused wires Unused wires Comfort Sync Thermostat with a Non Communicating Outdoor Unit ENABLED FURNACE Comfort Sync THERMOSTAT NON COMMUNICATING OUTDOOR AIR CO...

Page 5: ...evice section Refrigerant Piping If the 4SCU16 LS unit is being installed with a new indoor coil and line set the refrigerant connections should be made as outlined in this section If an existing line...

Page 6: ...ne only 8 8 Tape or Wire Tie Strap the vapor line to the joist or rafter at 8 intervals then strap the liquid line to the vapor line Floor Joist or Roof Rafter Metal Sleeve Floor Joist or Roof Rafter...

Page 7: ...507607 03 Issue 1827 Page 7 of 23 Figure 9 Refrigerant Line Sets Installing Vertical Runs Figure 10 Flushing Connections...

Page 8: ...voltage and line voltage connections to the new outdoor unit Do not turn on power to the unit or open the outdoor unit service valves at this time 4 Remove the existing R 22 refrigerant flow control o...

Page 9: ...ling the higher system operating pressures The gauges should be rated for use with pressures 1 800 on the high side and a low side of 30 vacuum to 250 psi with dampened speed to 500 psi Gauge hoses mu...

Page 10: ...w R410A into the line set and indoor unit Weigh in a trace amount of R410A A trace amount is a maximum of 2 oz of refrigerant or 3 lbs pressure Close the valve on the R410A cylinder and the valve on t...

Page 11: ...et disconnect the manifold hose from the vacuum pump Open the service valves to break the vacuum in the line set and indoor unit Start Up If unit is equipped with a crankcase heater it should be energ...

Page 12: ...perature 5 When the heating demand has been satisfied switch the thermostat to cooling mode with a set point of 68 F When pressures have stabilized use a digital thermometer to record the liquid and s...

Page 13: ...5 50 45 40 55 50 45 40 55 50 45 40 ON OFF 30 PSC LO PS HI PS Y1 OUT Y2 OUT OUT O R I I C DS O Y1 Y2 L W COIL AMB DIS OPEN OFF OPEN 90 F 2ND STAGE LOCK IN 55 F 50 F 45 F 40 F DEFROST TERMINATION 100 F...

Page 14: ...unit control circuit is isolated from power and the field supplied relays bypass the outdoor thermostats An amber indicating light simultaneously comes on to remind the homeowner that the unit is ope...

Page 15: ...ers Verify configuration of system Communicating systems only Reconfigure the system Replace control if heating or cooling is not available Only applicable in the communicating mode not in startup Exi...

Page 16: ...he recommended upper limit of 279 F Discharge line high temperature error count reached 5 strikes Confirm that the system is properly charged with refrigerant Check system operating pressures and comp...

Page 17: ...C 2AC 1 Stage AC 1HP 1 Stage AC 2HP Power Up 7 Segment Display String 2 H P ___ ___ ___ ___ ___ ___ Unit Type Stages No Capacity No Fan Profile Power Up Reset following display of self discovered conf...

Page 18: ...1 E pause 250 pause E pause 231 Next codes up to 10 are shown using same method If there are no error codes stored E pause 000 Fault Memory Clear After the fault memory is cleared the following string...

Page 19: ...ode string d pause F Outdoor fan RPM pause A ambient temp displayed pause repeat mode IMPORTANT On 2 stage unit R to DS link must be cut and correct RPM outdoor fan profile selected for outdoor fan to...

Page 20: ...will automatically exit Field Test Mode If 10 second period expires or push button is held for less than 3 seconds control will automatically exit Field Test Mode and go into Idle Mode without storin...

Page 21: ...nd all access panels must be in place any time the unit is in operation Some systems are equipped with an electronic air cleaner designed to remove the majority of airborne particles from the air pass...

Page 22: ..._____________ Rated Load Ampacity _______________ Compressor Amperage _________________ OutdoorFan _____________________ Maximum Fuse or Circuit Breaker ____________________________ Electrical Connect...

Page 23: ...507607 03 Issue 1827 Page 23 of 23 Figure 15 4SCU16LS124 36 48 60 Wiring Diagram...

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