manualshive.com logo in svg
background image

5012886-YIM-B-0517

Johnson Controls Unitary Products

19

voltage. Refer to the wiring labels inside of the unit 
control access panel for additional information.

Continuous Blower

By setting the room thermostat to “ON,” the low voltage control 
circuit from the “R” to “G” is completed and the supply air blower 
will operate continuously.

Intermittent Blower

With the room thermostat fan switch set to “AUTO” and the 
system switch set to either the “AUTO” or “HEAT” settings, the 
blower is energized whenever a cooling or heating operation is 
requested. The blower is energized after any specified delay 
associated with the operation.

When energized in cooling mode, the indoor blower has a 
minimum run time of 30 seconds. Additionally, the indoor 
blower has a delay of 10 seconds between operations.

Cooling Sequence Of Operation

When the thermostat calls for the first stage of cooling, the low-
voltage control circuit from the "R" to "Y1" (UCB 1 Y1) and "G" 
is completed and the first stage of cooling by energizing the M1 
contactor of Compressor 1 and the RY1 (Outdoor Fan Relay) 
for both condenser fans FM1 & FM2 of System 1. When the 
LPS of UCB-1 falls below its cut-out point the CN-Fan output 
brings on the PR1 and 1LLS (Solenoid) allowing refrigerant in 
system 1 to flow for normal mechanical cooling function. After 
completing the specified fan on delay for cooling, the UCB 1 will 
energize FR1 (Indoor Fan Relay) energizing the indoor blower 
motor via G1 output.

When the thermostat calls for the second stage of cooling, the 
low-voltage control circuit from "R" to "Y2" (UCB 1 Y2) is 
completed. The UCB 1 energizes the M2 contactor of 
Compressor 2 and the RY2 (Staging Relay) for the 2LLS 
(Solenoid) and both condenser fans FM1 & FM2 of System 1. 
FM2 is controlled by pressure.

If there is an initial call for both stages of cooling, the SE control 
board (UCB 1) will delay energizing compressor two by 30 
seconds in order to avoid an excessive power rush.

When the thermostat calls for the third stage of cooling, the low-
voltage control circuit from the "R" replicate Y1 sequence into 
Y2 as above to "Y3" (UCB 2 Y1) is completed. The SE control 
board (UCB 2) activates the pump-out on start-up function and 
the third stage of cooling by energizing the M3 contactor of 
Compressor 3 and the RY3 (Outdoor Fan Relay) for both 
condenser fans FM3 & FM4 of System 2. When the LPS of 
UCB-2 falls below its cut-out point the PR2 relay brings on the 
3LLS (Solenoid) allowing refrigerant in system 2 to return flow 
to the compressor for normal mechanical cooling function. FR2 
relay will also energize providing a G2 output as needed in 
some applications.

When the thermostat calls for the fourth stage of cooling, the 
low-voltage control circuit from "R" to "Y4" (UCB 2 Y2) is 
completed. The UCB 2 energizes the M4 contactor of 

Compressor 4 and the RY4 (Staging Relay) for 4LLS (Solenoid) 
and both condenser fans FM3 & FM4 of System 2.

Once the thermostat has been satisfied, the SE control boards 
will de-energize Y1, Y2, Y3 and Y4. If the compressors have 
satisfied their minimum run times, the compressors and 
condenser fans are de-energized. Otherwise, the unit operates 
each cooling stage until the ASCD has elapsed. Upon the 
completion of first stage cooling, the blower is stopped following 
the completion of the fan off delay cycle.

Condenser Fan Operation

These condensing units are factory equipped with fan cycling 
switches (PS1 System1 and PS2 System 2) to regulate system 
head pressure. When outdoor ambient conditions are cool, the 
head pressure of any air conditioning system may drop too low 
for optimal performance. These condensing units maximize 
system performance in a variety of ambient conditions by 
incorporating fan cycling switches to maintain proper system 
head pressure.

On these condensing units, the condenser fans of a given 
system (1 or 2) are powered when a compressor call is made 
(C1, C2 (UCB1) C1, C2 (UCB2)) & the respective compressor 
is energized. Fan FM1 (System 1) or Fan FM3 (System 2) will 
start immediately upon a call for first or third stage cooling.

However, Fan FM2 (System 1) or Fan FM4 (System 2) is 
equipped with a fan cycling switch (PS1 or PS2) and will not 
start until the system head pressure reaches 480 psig. Fan 2 or 
4 will operate until the system head pressure drops below 300 
psig where the fan cycling switch will shut the fan down. The 
unit will continue to operate Fan FM1 or FM3 until the system 
head pressure again reaches 480 psig at which time Fan FM2 
or FM4 will restart. Condenser fans operate as above 
regardless of lead-lag preference.

Operation With A Four-Stage Thermostat

If the total system is to be controlled with a 4-stage thermostat:

1.

Terminals Y1 and Y2 of the Smart Equipment™ control 
board (UCB 1) controlling System 1, should be connected 
to stages 1 and 2 of the 4-stage thermostat.

Figure 11: Fan Orientation Control Box End

Содержание YD360 Series

Страница 1: ...Unit 9 6 Unit Dimensions Inches 14 7 Piping And Electrical Connection Sizes 30 40 50T Inches 16 8 Electrical Power Knockout Sizes Inches 16 9 Smart Equipment UCB Details 23 LIST OF FIGURES 1 Corner We...

Страница 2: ...50 Ton C00 Cooling Only Product Options AA None TA Technicoat Condenser Coil Installation Options A None 2 208 230 3 60 4 460 3 60 5 575 3 60 Configured Split Condenser Model Number Nomenclature A St...

Страница 3: ...n the carrier s freight bill A separate request for inspection by the carrier s agent should be made in writing Improper installation may create a condition where the operation of the product could ca...

Страница 4: ...em Scroll Tandem Scroll Quantity 2 2 2 Cooling Nominal Capacity Tons System 1 15 20 25 System 2 15 20 25 Capacity Stages System 1 2 2 2 System 2 2 2 2 SYSTEM DATA No Refrigeration Circuits 2 2 2 Sucti...

Страница 5: ...ngth to support the unit The condensing unit must be mounted on level supports The supports can be channel iron beams or wooden beams treated to reduce deterioration Minimums of two 2 beams are requir...

Страница 6: ...on of vibration Holes are provided in the base rails for bolting the unit to its foundation For ground level installations precautions should be taken to protect the unit from tampering and unauthoriz...

Страница 7: ...of the unit When preparing to move the unit always determine the center of gravity see Table 3 and Figure 1 of the unit in order to equally distribute the weight Slings connected to the compressor end...

Страница 8: ...to compressor replacement repairing refrigerant leaks replacing refrigerant components such as filter drier pressure switch metering device or coil Units are shipped with compressor mountings which ar...

Страница 9: ...3 60 1 1 2 4 2 9 63 5 70 575 3 60 4 9 0 14 78 575 3 60 1 1 2 4 2 2 47 1 50 YD480 208 230 3 60 4 30 1 47 225 208 230 3 60 1 1 2 4 5 8 151 1 175 460 3 60 4 16 7 26 114 460 3 60 1 1 2 4 2 9 82 6 90 575 3...

Страница 10: ...emperatures must also be insulated Never solder suction and liquid lines together They can be taped together for convenience and support purposes but they must be completely insulated from each other...

Страница 11: ...ctions of the main lines Connect the main liquid line to the liquid line connection on the evaporator unit while maintaining a flow of nitrogen Make the suction line connection at the evaporator and r...

Страница 12: ...Line Solenoid Wiring NOTE For applications on airhandlers evaporator DX coils other than ND360 600 certified matchups liquid line solenoids may be required for proper operation and refrigerant system...

Страница 13: ...On non ND models isolation relays must be installed to avoid overloading on 75 VA transformer on condensing unit Non ND units may not include any or all of the components required to wire the unit Use...

Страница 14: ...4 Johnson Controls Unitary Products Figure 6 YD Unit Dimensions Table 6 Unit Dimensions Inches MODEL A B C D E F G H YD360 128 5 88 5 37 5 41 8 40 0 46 1 37 1 23 6 YD480 128 5 88 5 57 7 41 8 40 0 46 1...

Страница 15: ...183 2 313 88 140 22 358 20 858 19 358 37 518 12 878 9 628 5012886 YIM B 0517 Johnson Controls Unitary Products 15 Figure 7 30 Ton Power And Control Wiring Connections Figure 8 40 50 Ton Power And Cont...

Страница 16: ...NTRY SIZE SUCTION LINE SYS 1 1 5 8 OD LIQUID LINE SYS 1 7 8 OD SUCTION LINE SYS 2 1 5 8 OD LIQUID LINE SYS 2 7 8 OD POWER WIRING KNOCKOUT SEE TABLE 8 CONTROL WIRING 7 8 HOLE Table 8 Electrical Power K...

Страница 17: ...ent clearances been provided 2 Has all foreign matter been removed from the interior of the unit tools construction or shipping materials etc 3 Have the condenser fans been rotated manually to check f...

Страница 18: ...minute If it fails to close the unit will shut down the associated compressor and begin an ASCD If the call for cool is still present at the end of the anti short cycle time delaying the control boar...

Страница 19: ...of System 2 When the LPS of UCB 2 falls below its cut out point the PR2 relay brings on the 3LLS Solenoid allowing refrigerant in system 2 to return flow to the compressor for normal mechanical coolin...

Страница 20: ...enance consists of changing or cleaning filters and general cleaning of the outdoor coil MOTORS Outdoor fan motors are permanently lubricated and require no maintenance OUTDOOR COIL Dirt should not be...

Страница 21: ...cursor is on the top Status line hit the ENTER button This action steps the LCD display into the status mode Hit ENTER to view the status menu Press Enter Step 2 Scroll down to DVent Mode This is the...

Страница 22: ...CANCEL JOY C PWR 7 7 77 Clg Engaged LeadLag Engaged Press Enter Joy Stick Down 2 Step 6 By toggling down twice the screen reaches the ClgOcc SP screen or Cooling Occupied Set Point ENTER CANCEL JOY C...

Страница 23: ...mostat connection strip C and indoor blower VFD pin C 24V 24 VAC 75 VA transformer hot Powers the UCB microprocessor connects through circuit trace to the SD 24 terminal SD 24 24 VAC hot out for facto...

Страница 24: ...hing in series Unit wiring harness jumper plug for factory shutdown accessories must be removed if the switching of field added external accessories for unit shutdown are wired between thermo stat con...

Страница 25: ...ut from 10K 77 F Type III negative temperature coefficient thermistor Input required for 2 compressor heat pump units not required for 2 compressor A C units not active for 1 compressor units 3 625 VD...

Страница 26: ...no input within 5 minutes from initiation of H1 output initiates an Ignition Failure alarm input for longer than 5 minutes without H1 output initiates a Gas Valve Mis wire alarm Pin Cooling and fan o...

Страница 27: ...put is needed input must be present to allow FAN output and unit operation One FAN OVR trip lasting longer than 5 minutes or three FAN OVR trips in a two hour period cause a Fan Overload Lockout and u...

Страница 28: ...munication circuit COM Common for the FC Field Connected BUS BACnet MSTP communication circuit Negative of the VDC FC bus BACnet MSTP communication circuit SHLD Shield for the FC Field Connected BUS B...

Страница 29: ...with the TXV s left to the factory setting If the TXV s have been adjusted in the field the charging chart may no longer apply Outdoor Air Entering Condenser F 300 350 400 450 500 550 600 120 130 140...

Страница 30: ...scharge Pressure psi Suction Pressure psi Charging Curves 50 Ton 115 105 95 85 65 1 Make sure that all condenser fans are running when charging 2 This chart is applicable to unit with the TXV s left t...

Страница 31: ...5012886 YIM B 0517 Johnson Controls Unitary Products 31 Typical Wiring Diagrams Figure 17 Typical 208 230 Volt YD360 480 600 Condensing Unit Wiring Diagram...

Страница 32: ...5012886 YIM B 0517 32 Johnson Controls Unitary Products Typical Wiring Diagrams Figure 18 Typical 460 575 Volt YD360 480 600 Condensing Unit Wiring Diagram...

Страница 33: ...ocedures are followed and checks are made at initial start up This confidence is supported by the 30 day dealer protection coverage portion of our standard warranty policy which states that Johnson Co...

Страница 34: ...he equipment If the system is a VAV system the CFM will be the airflow when the remote VAV boxes are in the full open position and the frequency drive is operating at 60 HZ Do not proceed with the equ...

Страница 35: ...ystem 2 Is Condenser below Evaporator Yes No Yes No Total Line Length end to end _______ Ft _______ Ft Vertical Lift in Ft _______ Ft _______ Ft Vertical Fall in Ft _______ Ft _______ Ft Number of Elb...

Страница 36: ...t or change required to obtain the correct airflow Was it necessary to increase of decrease the airflow to meet the design conditions If the motor pulley size was changed measure the outside diameters...

Страница 37: ...hird if equipped Fourth if equipped Heat Pump 1st Stage Outside air temperature ________________ db F ________________ wb F ________________ RH Return Air Temperature ________________ db F ___________...

Страница 38: ..._______________________________ ________________________________________________________________________________________________________ _______________________________________________________________...

Отзывы: