Specifications

UNIT SPECIFICATIONS
F
OR ALL UNITS:
- For R-134a or R-22 refrigerant charge, multiply R-404 by 1.09.
- Operating charge is based on 30% liquid and 70% vapor at 25ºF suction.
LS S
ERIES
:
- Use LSR model for hot gas reverse cycle defrosts.
- Use LST model for hot gas three pipe defrost with gas drain pan.
- Air throw for LS Series: 25 to 35 feet.
LP S
ERIES:
- Use LPG model for hot gas reverse cycle defrost with electric drain pan.
- Use LPH model for hot gas three pipe defrost with electrical drain pan.
- Air throw for LP Series: 12 to 18 feet on each side.
LA SERIES:
- Use LAG model for hot gas reverse cycle defrost with electric drain pan.
- Use LAH model for hot gas three pipe defrost with electric drain pan.
- Air throw for LA Series: 10 to 15 feet on each side.
TROUBLESHOOTING CHART
SYMPTOMS POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS
Fan(s) will not operate 1. Main switch open 1. Close switch
2. Blown fuses 2. Replace fuses. Check for short circuits
3. Defective motor or overload conditions.
4. Defective timer or defrost thermostat 3. Replace motor
5. Unit in defrost cycle 4. Replace defective component
6. Coil does not get cold enough to reset thermostat 5. Wait for completion of cycle
6. Adjust fan delay setting of thermostat
Room temperature too high 1. Room thermostat set too high 1. Adjust thermostat
2. Superheat too high 2. Adjust thermal expansion valve
3. System low on refrigerant 3. Add refrigerant
4. Coil iced-up 4. Manually defrost coil and check defrost
controls for malfunctions
Ice accumulating on ceiling 1. Defrost duration is too long 1. Adjust defrost termination thermostat
around evaporator and/or on 2. Fan delay not delaying fans after defrost period 2. Defective defrost thermostat or not adjusted properly
fan guards, venturi, or blades 3. Defective defrost thermostat or timer 3. Replace defective components
4. Too many defrosts 4. Reduce number of defrost
Coil not clearing of frost 1. Coil temperature not getting above 1. Check heater operation
during defrost cycle freezing point during defrost 2. Adjust timer for more defrost cycles
2. Not enough defrost cycles per day 3. Adjust defrost thermostat or timer for longer cycle
3. Defrost cycle too short 4. Replace defective component
4. Defective timer or defrost thermostat
Ice accumulating in drain pan 1. Defective heater 1. Replace heater
2. Unit not pitched properly 2. Check pitch and adjust if necessary
3. Drain line plugged 3. Clean drain line
4. Defective drain line heater 4. Replace heater
5. Defective timer or thermostat 5. Replace defective component
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
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