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Pre-Start

RT-SVX39B-EN

27 

Use the checklist provided below in conjunction with the 
“General Unit Requirements” checklist to ensure that the 
unit is properly installed and ready for operation.

Check all electrical connections for tightness and 
“point of termination” accuracy.

Verify that the condenser airflow will be unobstructed.

Verify that the condenser fan and indoor blower turn 
freely without rubbing and are properly tightened on 
the shafts.

Check the supply fan belts for proper tension and the 
fan bearings for sufficient lubrication. If the belts 
require adjustment, or if the bearings need lubricating, 

refer to the maintenance section of this manual for 
instructions.

Verify that a condensate trap is installed and the piping 
is properly sized and pitched.

Verify that the correct size and number of filters are in 
place. 

Inspect the interior of the unit for tools and debris and 
install all panels in preparation for starting the unit.

Voltage Imbalance

Three phase electrical power to the unit must meet 
stringent requirements for the unit to operate properly. 
Measure each leg (phase-to-phase) of the power supply. 
Each reading must fall within the utilization range stamped 
on the unit nameplate. If any of the readings do not fall 
within the proper tolerances, notify the power company to 
correct this situation before operating the unit.

Excessive three phase voltage imbalance between phases 
will cause motors to overheat and eventually fail. The 
maximum allowable voltage imbalance is 2%. Measure 
and record the voltage between phases 1, 2, and 3 and 
calculate the amount of imbalance as follows: 

V1, V2, V3 = Line Voltage Readings

VD = Line Voltage reading that deviates the farthest from 
the average voltage.

Example: If the voltage readings of the supply power 
measured 221, 230, and 227, the average volts would be:

VD (reading farthest from average) = 221

The percentage of Imbalance equals:

The 2.2% imbalance in this example exceeds the 
maximum allowable imbalance of 2.0%. This much 
imbalance between phases can equal as much as a 20% 
current imbalance with a resulting increase in motor 
winding temperatures that will decrease motor life. If the 
voltage imbalance is over 2%, notify the proper agencies 
to correct the voltage problem before operating this 
equipment.

Electrical Phasing (Three Phase Motors)

The compressor motor(s) and the supply fan motor are 
internally connected for the proper rotation when the 
incoming power supply is phased as A, B, C.

Table  5.

Temperature versus resistance (temperature vs. 
resistance is negative)

Temperature

Degrees F° Degrees C°

Nominal 

Resistance

-20°

-28.9°

170.1 K - Ohms

-15°

-26.1°

 143.5 K - Ohms

-10°

-23.3°

121.4 K - Ohms

-5°

 -20.6°

103.0 K - Ohms

 -17.8°

87.56 K - Ohms

 -15.0°

74.65 K - Ohms

10°

 -12.2°

63.80 K - Ohms

15°

-9.4°

54.66 K - Ohms

20°

-6.7°

46.94 K - Ohms

25°

-3.8°

40.40 K - Ohms

30°

-1.1°

34.85 K - Ohms

35°

1.7°

30.18 K - Ohms

40°

4.4°

26.22 K - Ohms

45°

7.2°

22.85 K - Ohms

50°

10.0°

19.96 K - Ohms

55°

12.8°

17.47 K - Ohms

60°

15.6°

15.33 K - Ohms

65°

18.3°

13.49 K - Ohms

70°

21.1°

11.89 K - Ohms

75°

23.9°

10.50 K - Ohms

80°

26.7°

9.297 K - Ohms

85°

29.4°

8.247 K - Ohms

90°

32.2°

7.330 K - Ohms

95°

35.0°

6.528 K - Ohms

100°

37.8°

5.824 K - Ohms

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote 
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be 
inadvertently energized. Failure to disconnect power 
before servicing could result in death or serious injury.

% Voltage Imbalance = 

100 X AV - VD 

where;

AV

AV (Average Voltage) 

Volt 1 + Volt 2 + Volt 3 

3

221 + 230 + 227 

= 226 Avg.

3

100 X 226 - 221 

= 2.2%

226

Содержание Precedent WSC060ED

Страница 1: ...ining Improperly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all precautions in the literature and on...

Страница 2: ...responsible management of refrigerants Know the applicable laws and follow them Revision Summary RT SVX39B EN 11 September 2012 MERV 8 filter with filter removal tool Stainless steel drain pan condens...

Страница 3: ...nstalled Power Wiring 22 Main Unit Power Standard Wiring 22 Field Installed Control Wiring 22 Controls using 24 VAC 23 Controls using DC Analog Input Outputs Standard Low Voltage Multiconductor Wire 2...

Страница 4: ...Digital Zone Sensor Test 39 Unit Economizer Control ECA Trouble shooting ReliaTel Control 40 Wiring Diagrams 41 Limited Warranty 42 Heat Pump WCC WCD WCH WCM and WSC Parts Only 42 Heat Pump WCZ WCY W...

Страница 5: ...connect6 2 Unit Mounted Circuit Breaker6 Digit 20 Convenience Outlet 0 No Convenience Outlet A Unpowered Convenience Outlet B Powered Convenience Outlet three phase only 7 Digit 21 Communications Opti...

Страница 6: ...rcuit breaker options 7 Requires use of Disconnect or Circuit Breaker 8 Standard metering devices are TXVs 9 The return air smoke detector may notfit upor workproperly on the Precedent units when used...

Страница 7: ...the unit It is capable of delivering up to 25 inch pounds of torque and is powered by 24 VAC RTCI ReliaTel Trane Communication Interface Optional This module is used when the application calls for an...

Страница 8: ...ed the compressor will not be allowed to operate Anytime this circuit is opened for 1 continuous second during compressor operation the compressor for that circuit is immediately turned Off The compre...

Страница 9: ...to a BAYSENS119 remote panel wiring must be 18 AWG shielded twisted pair Belden 8760 or equivalent Refer to the specific remote panel for wiring details Wireless Zone Sensor BAYSENS050 This electronic...

Страница 10: ...10 RT SVX39B EN Unit Clearances Figure 1 Typical installation clearances for single multiple unit applications WSC060E unit WSC072 120E units...

Страница 11: ...es RT SVX39B EN 11 Figure 2 Heat pump 5 ton Note All dimensions are in inches millimeters Figure 3 Heat pump 5 ton unit clearance and roof opening Note All dimensions are in inches millimeters CLEARAN...

Страница 12: ...Unit Clearances 12 RT SVX39B EN Figure 4 Heat pump 5 ton roof curb Note All dimensions are in inches millimeters Figure 5 Heat pumps 6 7 tons Note All dimensions are in inches millimeters...

Страница 13: ...Clearances RT SVX39B EN 13 Figure 6 Heat pump 10 ton Note All dimensions are in inches millimeters Figure 7 Heat pump 6 10 ton unit clearance and roof opening Note All dimensions are in inches millime...

Страница 14: ...Unit Clearances 14 RT SVX39B EN Figure 8 Heat pump 6 10 ton roof curb Note All dimensions are in inches millimeters 2130 MM 356 MM...

Страница 15: ...he consignee Do not remove damaged material from the receiving location Take photos of the damage if possible The owner must provide reasonable evidence that the damage did not occur after delivery No...

Страница 16: ...f gravity dimensions in mm Tons Unit Model No Maximum Model Weights a lbs kgs Corner Weights b Center of Gravity in mm Shipping Net A B C D Length Width 5 WSC060ED 667 304 562 256 169 77 140 64 96 44...

Страница 17: ...air openings as viewed form the rear of the unit Elbows with turning vanes or splitters are recommended to minimize air noise due to turbulence andto reduce static pressure When attaching the ductwor...

Страница 18: ...rb ductwork must be fabricated and installed by the installing contractor before the unit is set into place Note For sound consideration cut only the holes in the roof deck for the ductwork penetratio...

Страница 19: ...the unit for shipping damage and material shortage file a freight claim and notify appropriate sales representative Verify correct model options and voltage from unit nameplate Verify that the install...

Страница 20: ...he outward edge of each duct cover with 2 screws 5 Slide RETURN DUCT COVER insulation side up into supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange...

Страница 21: ...ccess panel and supply air access panels 2 Remove the support panel that the condensate drain pan exits through 3 Slide the condensate drain pan out of the unit 4 Place on a level surface in the posit...

Страница 22: ...dard Wiring 1 Location of the applicable electrical service entrance is illustrated in Unit Clearances p 10 Complete the unit s power wiring connections at Compressor Contactor 1 CC1 inside the unit c...

Страница 23: ...etween the unit and components utilizing a DC analog input output signal refer to Unit Clearances p 10 for the electrical access locations provided on the unit 1 Table 4 lists the conductor sizing gui...

Страница 24: ...Installation 24 RT SVX39B EN Figure 24 ReliaTel refrigeration module Figure 25 Customer control low voltage routing...

Страница 25: ...rature averaging Example 1 illustrates two series circuits with two sensors in each circuit wired in parallel The square of any number of remote sensors is required Example 2 illustratesthreesensorssq...

Страница 26: ...27 Typical field wiring diagrams for optional controls BAYSENS119 ASYSTAT777 Zone Sensor BAYSENS077 ASYSTAT111 BAYSENS107 BAYSENS073 Zone Sensor BAYSENS077 ASYSTAT111 BAYSENS109 BAYSENS074 Zone Sensor...

Страница 27: ...ing that deviates the farthest from the average voltage Example If the voltage readings of the supply power measured 221 230 and 227 the average volts would be VD reading farthest from average 221 The...

Страница 28: ...Upon power initialization the RTRM performs self diagnostic checks to insure that all internal controls are functional It also checks the configuration parameters against the components connected to...

Страница 29: ...t will automatically revert to the applied System control method For unit test steps test modes and step resistance values to cycle the various components refer to Table 6 p 30 ReliaTel Controls Upon...

Страница 30: ...y adjustment set screw and turn sheave clockwise To decrease fan RPM loosen the pulley adjustment set screw and turn sheave counterclockwise If the required CFM is too high external static pressure is...

Страница 31: ...nded period 15 to 30 minutes the motor winding can overheat and cause the motor winding thermostat to open 3 After the compressor and condenser fan have started and operated for approximately 30 minut...

Страница 32: ...e amount of belt deflection that corresponds to the proper belt tension 2 Set the large O ring on the belt tension gauge at the deflection value determined in Step 1b 3 Set the small O ring at zero on...

Страница 33: ...all P D Range Super Gripbelts Gripnotch Steel Cable Gripbelts Min Max Min Max Min Max A 3 0 3 6 3 4 1 2 3 7 8 5 1 2 3 1 4 4 3 8 4 8 3 1 2 5 4 1 2 6 1 4 3 3 4 4 3 4 5 0 7 0 4 5 1 2 5 6 7 8 4 1 4 5 1 4...

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