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SAFETY LABELING AND SIGNAL WORDS 
 
Danger, Warning and Caution

 

The signal words 

DANGER, WARNING

 and 

CAUTION

 are used to identify levels of hazard 

seriousness. The signal word 

DANGER 

is only used 

on product labels to signify an immediate hazard. The 
signal words 

WARNING 

and 

CAUTION

 will be used 

on product labels and throughout this manual and 
other manuals that may apply to the product. 

 

Signal Words

 

 
DANGER 

– Immediate hazards which 

WILL 

result in 

severe personal injury or death. 

 
WARNING 

– Hazards or unsafe practices which 

COULD 

result in severe personal injury or death.

 

 
CAUTION 

– Hazards or unsafe practices which 

COULD 

result in minor personal injury or product or 

property damage. 

 

Signal Words in Manuals 

The signal word 

WARNING 

is used throughout this 

manual in the following manner: 
 

 
 
 
 
 
 
 

The signal word 

CAUTION 

is used throughout this 

manual in the following manner: 

 
CAUTION 
 
Product Labeling

 

Signal words are used in combination with colors 
and/or pictures on product labels. Following are 
examples of product labels with explanations of the 
colors used. 

 

 

 

 

 

 

 
 

Operational failure of this unit for any reason, including but not limited to mechanical or electrical failure of devices 
internal or external to the unit, loss of fuel such as natural or LP gas, or interruption of electric power may result in the 
introduction of large volumes of air into the conditioned space that could cause freeze or other damage to property. 

It is the responsibility of the installer and/or user of this unit to provide equipment such as a source of emergency 
heat, alarm systems, or supervisory systems to warn of such failures. 

 

 

Electric Shock Hazard. 

Turn Off All Power 
Before Servicing

.

 

 

Fire Hazard. 

Use copper wire only.

 

 

Failure to observe could 
result in property damage, 
bodily injury or death.

 

 

WARNING 

Danger Label 

White lettering on a black background except the word 

DANGER

 which is white with a red background. 

Warning Label 

White lettering on a black background except the word 

WARNING

 which is white with an orange background. 

 

   

DANGER 

 

Cuts and Abrasion Hazard. 
 
Wear gloves and handle 
with care. 
 
Failure to observe could 
result in bodily injury.

 

 

  

CAUTION 

Caution Label 

White lettering on a black background except the word 

CAUTION

 which is white with a yellow background. 

 

WARNING 

CAUTION

Summary of Contents for RCA051

Page 1: ...3 11 4 RCA101 V HCA101 110 5 12 1 RCA141 V HCA141 142 3 11 5 RCA171 V HCA201 187 9 14 7 RCA201 V HCA201 217 0 14 6 RCA271 V HCA271 263 2 13 9 RCA361 V HCA361 311 6 13 3 RCA421 V HCA421 395 5 12 5 95...

Page 2: ...s of the colors used Operational failure of this unit for any reason including but not limited to mechanical or electrical failure of devices internal or external to the unit loss of fuel such as natu...

Page 3: ...rator at the air handling unit as possible The liquid line solenoid is factory installed on units with hot gas reheat Hot Gas Bypass Circuit Provided for capacity control by maintaining a constant suc...

Page 4: ...rive sheaves connected to a 1725 rpm motor The blower has sealed ball bearings that do not require lubrication Blower Motor The blower motor operates at 1725 rpm The motor has sealed ball bearings tha...

Page 5: ...lectric heater may be required Air Handler Model Heater kW Available V HCA051 1 9 V HCA071 1 12 V HCA141 1 25 V HCA201 5 39 V HCA271 5 50 V HCA361 10 60 Minimum 80 CFM per kW Table 4 UNIT LOCATION Con...

Page 6: ...unit support at mounting location Install proper electrical power service and disconnect switch Provide drainage as necessary Maintain minimum clearance for airflow into and out of unit Inspection of...

Page 7: ...1 030 0 5 1 090 0 6 1 160 0 7 1 500 680 0 3 780 0 3 870 0 4 960 0 5 1 040 0 6 1 100 0 7 1 100 650 0 2 770 0 3 860 0 3 940 0 4 1 020 0 5 1 090 0 6 1 160 0 6 VCA HCA 1 400 700 0 3 800 0 3 880 0 4 960 0...

Page 8: ...8 DIMENSIONS...

Page 9: ...9 DIMENSIONS Continued...

Page 10: ...10 DIMENSIONS...

Page 11: ...11 DIMENSIONS Continued...

Page 12: ...LA MCA Max Fuse Size 208 230 1 60 4 4 6 15 208 230 3 60 2 0 3 15 460 3 60 1 0 2 15 1 2 380 415 3 50 1 5 2 15 208 230 1 60 5 4 7 15 208 230 3 60 2 8 4 15 460 3 60 1 4 2 15 3 4 380 415 3 50 2 1 3 15 208...

Page 13: ...conjunction with the control for Hot Gas Reheat A remote system switch such as a timeclock or interlock may be used to energized the controls Once it is established that supply voltage is within the u...

Page 14: ...14 TYPICAL FIELD WIRING DIAGRAM...

Page 15: ...r handler is installed at a higher elevation than the compressor provide a vertical loop in the suction line adjacent to the air handler to a point at least to the top of the evaporator coil Do not in...

Page 16: ...ic acid also decomposes the compressor lubrication oil causing sludge Great care should be exercised in keeping moisture out of the refrigeration system when installing tubing because an extremely sma...

Page 17: ...17 FIELD WIRING DIAGRAM...

Page 18: ...ove 70 75 degrees F Reduce the evaporator load lower entering airflow until the suction pressure lowers to the point at which bypass is desired 115 PSIG If the hot gas bypass was de energized to stop...

Page 19: ...er is applied to the high pressure control and the adjustable time delay The time delay begins when power is applied to the timer After the time delay closes the circuit continues through the low pres...

Page 20: ...er in a commercial split system New system must be evacuated as outlined on page 14 to remove air and non condensables in the system The liquid line drier will trap any moisture left in the system Sys...

Page 21: ...d inlet clearances and for possible air re circulation Check high side equalized pressure reading with equivalent outdoor temperature Check calibration of switch Check discharge and liquid line pressu...

Page 22: ...on of low ambient head pressure control Suction Pressure Too Low Refrigerant undercharge Blower running backwards Loose blower pulley or belts Defective or improperly adjusted expansion valve Dirty fi...

Page 23: ...ilter Check superheat and adjust TXV check bulb Check compressor for proper operation See above high discharge pressure Check external static pressure Supply Air Temperature Too Low Airflow is too low...

Page 24: ......

Page 25: ...__________ WB _________ Design CFM ________________ Outdoor Air Inlet Temperature _____________ DB__________ WB _________ Outdoor Fan Discharge Air Temperature__________ DB ________ Suction Pressure _...

Page 26: ...26 NOTES...

Page 27: ...27 NOTES...

Page 28: ...28...

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