Related Manuals for United CoolAir C Series
Summary of Contents for United CoolAir C Series
- Page 1 Installation Manual “C” SERIES HORIZONTAL AIR CONDITIONING UNITS 1 Ton – 15 Ton Air-Cooled • Water-Cooled • Heat Pump 590A...
- Page 2 FORM CIM 0203...
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Page 3: Table Of Contents
Blower Speed Adjustment ..........18 Figure 30: Piping Outlet Locations ........ 38 Blower Motor Lubrication ..........18 Belts ................19 NOMENCLATURE Refrigerant Systems ............19 C Series Basic Unit Model Designation ......40 Evaporator and Air-Cooled Condenser Coils ....19... -
Page 4: Section 1 - Dimensional Drawings Figure 1: Dimension Drawing
FORM CIM 0203 AIR COOLED 1 THRU 1½ TON Labeled & Listed 0016CA Typical for Condensing Section Drain Connection FIGURE 1: Dimension Drawing Units are shown in Figures 1 and 3 without tie rails. See Items in Figures 5, 6 and 7, pages 6 and 7. - Page 5 FORM CIM 0203 DIMENSIONS FIGURE 3: Water-Cooled Water Connections 0017CA NOTE: CONDENSATE DRAIN MUST BE PIPED IN BOTH EVAPORATOR AND CONDENSING NOMINAL SECTIONS. D-WATER CONNECTIONS TONS 1 and 1-1/2 Ton Single 6-3/8" 10" 4" 7/8" O.D. on left side Circuit 2 thru 4 Ton Single 8-3/8"...
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Page 6: Section 2 - Unit Components
FORM CIM 0203 UNIT COMPONENTS LEGEND OF ITEMS Tie Rail Unit Top Tie Piece Access Panel, Evaporator Box Access Panel, Condenser Box Thermostat Wiring Connection 590A Power Wiring (Split-Unit – Evaporator Section) Low Voltage Wiring Connection Power Wiring Connection (for package units and for conden- sing sections in split systems). -
Page 7: Panels And Control Box Covers Removed
FORM CIM 0203 EVAPORATOR CONDENSER 594A LEGEND OF ITEMS Tie Rail Unit Top Tie Piece Wires to Disconnect (Split-unit) Specification Plates Thermostat Wiring Connection (for both package and split units) Power Wiring (for unit evaporator) Low Voltage Wiring Connection Power Wiring Connection Figure 7: Right Side (with control box access panels and control box covers removed) - Page 8 FORM CIM 0203 596A Figure 8: Split Unit (Condensing Section) Note: Air Switch (filter differential) located in same area as 21. LEGEND Electrical Control Box (condenser) Condenser Blower Condenser Coil Low Pressure Control High Pressure Control Compressor Condenser Drain Connection Muffler Suction Service Port Sight Glass...
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Page 9: Section 3 - General Information
FORM CIM 0203 GENERAL INFORMATION Discharge Air from condenser coil should be INSPECTION OF EQUIPMENT deflected away from supply air to condenser, Upon receipt of the unit, inspect for visible or con- to prevent recirculation. See also “Condens- cealed damage. Report any damage to the carrier, and ing Section Modification for Outside Instal- file a damage claim. -
Page 10: Compressor Mounting - Warning (2 Ton And Up)
FORM CIM 0203 4. Install unit so that controls and side panels Wire Size AWG. Gauge are accessible to the operator and maintenance personnel. 5. Run the condensate drain line by following the Maximum Wire Length Feet guidelines on page 15. Notes: 1. -
Page 11: Coupling
FORM CIM 0203 COUPLINGS to eliminate the possibility of screws which attach the top piece to the two top intermixing the circuits when the intercon- panels. (*If unit is already shipped split, these are necting tubing is installed. The suction and not included.) discharge lines in the evaporator section will 4. -
Page 12: Interconnect
FORM CIM 0203 FIGURE 15: Recommended Tubing Sizes for Interconnect SUCTION LINE LIQUID LINE Evap. Lower than Evap. Higher than Cond. Unit or on same level Max. Lift 40' as Cond. Unit Up to 100' Over 100' Up to 100' Over 100' Up to 100' Over 100... - Page 13 FORM CIM 0203 ing the necessary refrigerant, R-22 (See Step holds a vacuum after removal of the vacuum 7, page 13). A maximum length of 150 feet of pump (indicating no leaks). Add the appropri- interconnecting tubing is permitted if a liq- ate charge of R-22 Refrigerant using the uid line receiver tank is installed close to the Schrader valves.
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Page 14: Package Unit
FORM CIM 0203 Power wiring to the condensing and evaporator units PACKAGE UNIT must be wired through circuit breakers or service If the unit is to be installed as an integral (close- disconnects. Minimum circuit ampacity and maxi- coupled) unit, low voltage (thermostat) wiring is to mum fuse sizes for the condenser unit are shown on be brought through connection , Figures 5 and 7,... -
Page 15: Condensate Drain Connection
FORM CIM 0203 Water Regulating Valve the heat exchanger and the pressure drop as a new Each system is equipped with a factory installed water installation. See “Cleaning The Water Cooled Con- regulating valve. This valve is pressure operated; it denser”... -
Page 16: Section 5 - Maintenance Procedures
FORM CIM 0203 6); one for the condensing section (Item , Figure the blower. 6, page 6). All units require evaporator section drains to be installed. Heat pumps and water cooled con- This negative pressure can vary from less than 1" densing units also always require the installation of up to 2"... - Page 17 FORM CIM 0203 can be considered for cleaning. However, there are 3. Close the valves to and from the fluid circuit several other commercially available environmen- loop. tally safe products on the market that will do an ex- 4. Open the drain valve and drain all fluid from cellent job.
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Page 18: Blowers
FORM CIM 0203 9. Calculate the volume of de-scaler required: On units with three-phase fan motors, check for proper blower rotation at start-up. If they Water Quantity = 1/2 Total Gallons = ____ Gallons run backwards, interchange two of the in- De-Scaler Quantity = 1/2 Total Gallons =____ Gallons coming power leads. -
Page 19: Belts
208 / 230 Voltage Variation 187 / 253 414 / 504 All United CoolAir systems contain a liquid line sightglass. (See Item , Figure 8, page 8.) If bubbles appear in the sightglass, the system is either under- Cooling DB (Min./Max.) -
Page 20: Positive Temperature Coefficient Resistor
FORM CIM 0203 After the initial start period, the PTCR device will POSITIVE TEMPERATURE heat up as the resistance increases and block ad- COEFFICIENT RESISTOR (PTCR) ditional power flow through the start windings. When the compressor shuts off, a 3 to 5 minute A Start Assist Device (SAD) is utilized on all single- cool down period is needed for the PTCR device. -
Page 21: Section 6 - Physical Data Figure 21: Physical Data Table
FORM CIM 0203 PHYSICAL DATA Figure 21: Physical Data TONS 1-1/2 Voltage (d) 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-3-60 208/230-3-60 208/230-3-60 208/230-3-60 208/230-3-60 208/230-3-60 460-3-60 460-3-60 460-3-60 460-3-60 460-3-60 460-3-60 Supply Air (a) 1200 1600 2000 .2 to 1" .2 to 1"... - Page 22 FORM CIM 0203 PHYSICAL DATA Figure 21: Physical Data (continued) TONS Voltage (d) 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 - - - - - - - - - 208/230-3-60 208/230-3-60 208/230-3-60 208/230-3-60 208/230-3-60 460-3-60 460-3-60 460-3-60 460-3-60 460-3-60 460-3-60 460-3-60 Supply Air (a) 1600 2000 2400...
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Page 23: Section 7 - Sequence Of Operation
FORM CIM 0203 SEQUENCE OF OPERATION cept compressor activation is replaced by the COOLING SEQUENCE OF OPERATION chill water valve function. 1. Before starting the unit, make sure electrical 5. Heat pump cooling sequence is the same as power has been turned on for a minimum of above, except the reversing valve will also be 24 hours. -
Page 24: Heat Pump Heating Sequence Of Operation
FORM CIM 0203 HEAT PUMP HEATING SEQUENCE OF OPERATION 1. Before starting the unit, make sure electrical d. Moving the Fan switch to the “ON” posi- power has been turned on for a minimum of tion should cause the evaporator blower mo- 24 hours. -
Page 25: Section 8 - Options
FORM CIM 0203 OPTIONS CONDENSATE PUMP Programmable Thermostat Evaporator Section If extreme condensate conditions exist, it is pos- Enclosure sible to have a condensate pump installed in the evaporator drain pan without need for separate Terminal Board power source (See Item , Figure 6, page 6 - Ex- ternal Flare Connection). -
Page 26: Adjustment Of Hot Gas Bypass Valve
FORM CIM 0203 minutes) Vary the evaporator load to test at various con- ditions that the suction pressure does not fall If the high side pressure is not at or above 250 below the set point (58 psig for R-22). psig, block off the condenser inlet air stream until the pressure is above this threshold. -
Page 27: Electric Reheat
FORM CIM 0203 Option 2 is field installed in the form of a duct heater a grommet in the condenser panel (Item , Figure and must be installed a minimum of 4' downstream 6, page 6), to the liquid access fitting (marked “Low from the unit in the evaporator discharge duct. - Page 28 CHILLED WATER VALVES BUCK/BOOST TRANSFORMER Chilled water valves, if supplied by United CoolAir, are typically on/off only. The valve would be Units being applied on a 277-1-60 power supply shipped loose for installation in the field. The valve...
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Page 29: Economizer Operation (Airside)
FORM CIM 0203 content of the air. 3-Way Valve When these conditions meet the setting selected on Water the enthalpy sensing unit, a SPDT switch is ener- Condensing Coil gized and a call for cooling from the first stage of the room thermostat is then directed to the damper Water controller, which is usually mounted in the condi-... -
Page 30: Vertical Stacking Units
FORM CIM 0203 A sensor is provided in the water inlet side of the VERTICAL STACKING UNIT water cooled condenser. If the incoming water tem- perature is below the control setpoint, a normally The vertical stacking option is designed for instal- closed solenoid valve opens and lets the water pass lations where floor space is minimal and a ceiling through the free cooling coil. - Page 31 FORM CIM 0203 Figure 27: UNIT SIZE 1 & 1-1/2 Ton 36-1/2 2 through 5 Ton 4 through 8 Ton 10 through 15 Ton 71-1/4 0011CA Figure 28: Condensing Section Modification Kit For Outside Installation (Optional) 0006VI 0005VI Figure 29: Vertical Stacking Unit, Front View Figure 30: Vertical Stacking Unit, Rear View...
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Page 34: Section 9 - Troubleshooting Troubleshooting Chart
FORM CIM 0203 TROUBLE SHOOTING WARNING: Turn OFF power to unit before conducting any trouble shooting, unless the tests you are performing require system operation. Keep hands, clothing and tools clear of electrical terminals and rotating components. ITEM PROBLEM PROBABLE CAUSE SOLUTION CODE Wired improperly or... - Page 35 FORM CIM 0203 ITEM PROBLEM PROBABLE CAUSE SOLUTION CODE Lack of proper air Check filters: Clean or replace if necessary. quantity Check for obstruction across coil. Check rotation of evaporator blower to ensure correct rotation of evaporator blowers. Evaporator coil ices. Low return air Raise return air setpoint.
- Page 36 FORM CIM 0203 ITEM PROBLEM PROBABLE CAUSE SOLUTION CODE Air or other non- Evacuate system and recharge. Install new condensable gas in filter-drier. system Condenser air intake Clean away debris. Head pressure too high blocked Overcharge of Reclaim excess from high pressure side refrigerant of the system.
- Page 37 FORM CIM 0203 ITEM PROBLEM PROBABLE CAUSE SOLUTION CODE System short of Check for control wiring capacity in free to the free cool solenoid Check wiring diagram and rewire. cool (water coil) valve. mode Check to see Locate and repair electrical connection that power to the problem.
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Page 38: Sections
FORM CIM 0203 SPLIT CONDENSER / CONDENSING SECTIONS UNITED COOLAIR can supply condensers (with- with evaporator sections, other than UNITED out compressors) or condensing sections (with com- COOLAIR products, the units are supplied with the pressors) for split applications, both air- and water- refrigerant lines capped with only a holding charge cooled. - Page 39 FORM CIM 0203 Project: ____________________________________________________________ Model: ____________________________ ___________________________ Options ____________________________ ___________________________ ____________________________ ___________________________ ____________________________ ___________________________ Set Points: Cooling _________________________________________________ Heating _________________________________________________ _________________________________________________ Design: CFM ______________ / ______________ ESP Voltage ____________________________ EWT _______________ GPM __________ EAT _______________________________ OD Design __________________________ Controls Calibrated: Air Balance Completed: Service Agency: ____________________________________________________ ____________________________________________________...
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Page 40: C Series Basic Unit Model Designation
‘C’ SERIES BASIC MODEL DESIGNATION EXAMPLE: “C”, “SP”, “CW”, “SPW”, “H”, “HW”, “MA”, “MW”, “CCW”, “E”, or “B” “C” Air Cooled Air Conditioner 2 thru 15 Tons “SP” Air Cooled Air Conditioner 1 & 1.5 Tons “CW” Water Cooled Air Conditioner 2 thru 15 Tons “SPW”...
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