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430648-JIM-D-1010

Johnson Controls Unitary Products

11

Refrigerant Mains

Line Sizing

When sizing refrigerant pipe for a split-system air conditioner, 
check the following: 

1.

Suction line pressure drop due to friction.

2.

Liquid line pressure drop due to friction.

3.

Suction line velocity for oil return.

4.

Liquid line pressure drop due to vertical rise. For certain 
piping arrangements, different sizes of suction line pipe 
may have to be used. The velocity of the refrigerant vapor 
must always be great enough to carry the oil back to the 
compressor.

5.

Evaporator Located Below Condenser

 - On a split 

system where the evaporator blower is located below the 
condenser, the suction line must be sized for both pressure 
drop and for oil return.

6.

Condenser Located Below Evaporator

 - When the 

condenser is located below the evaporator blower, the 
liquid line must be designed for the pressure drop due to 
both friction loss and vertical rise. If the pressure drop due 
to vertical rise and friction exceeds 60 psi, some refrigerant 
will flash before it reaches the thermal expansion valve.

Flash gas:

1.

Increases the liquid line pressure loss due to friction that in 
turn causes further flashing. 

2.

Reduces the capacity of the refrigerant control device 
which starves the evaporator. 

3.

Erodes the seat of the refrigerant control device. 

4.

Causes erratic control of the refrigerant entering the 
evaporator.

Take Adequate Precautions

Many service problems can be avoided by taking adequate 
precautions to provide an internally clean and dry system and 
by using procedures and materials that conform to established 
standards.

Use hard drawn copper tubing where no appreciable amount of 
bending around pipes or other obstructions is necessary. If soft 
copper is used, care should be taken to avoid sharp bends that 
may cause a restriction. Pack fiberglass insulation and a 
sealing material such as permagum around refrigerant lines 
where they penetrate a wall to reduce vibrations and to retain 
some flexibility.

Support all tubing at minimum intervals with suitable hangers, 
brackets or clamps.

Braze all copper-to-copper joints with Silfos-5 or equivalent 
brazing material. Do not use soft solder. Insulate all suction 
lines with a minimum of 1/2" ARMAFLEX or equivalent that 
meets local codes. Liquid lines exposed to direct sunlight and/
or high temperatures 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.

The liquid and suction service ports on the condenser section 
permit leak testing, evacuation, and partial charging of the field 
piping and the evaporator without disturbing refrigerant stored 
in the condenser during initial installation.

Before beginning installation of the main lines, be sure that the 
evaporator section has not developed a leak in transit. Check 
pressure at the Schrader valve located on the header of each 
coil. If pressure still exists in the system, it can be assumed to 
be leak free. If pressure DOES NOT exist the section will need 
to be repaired before evacuation and charging is performed.

A filter-drier MUST be field-installed in the liquid line of every 
system to prevent dirt and moisture from damaging the system. 
Properly sized filter-driers are shipped with each condensing 
section.

NOTE: 

Installing a filter-drier does not eliminate the need for 
the proper evacuation of a system before it is charged.

A field-installed moisture indicating sight-glass should be 
installed in the liquid line(s) between the filter-drier and the 
evaporator coil. The moisture indicating sight-glass can be used 
to check for excess moisture in the system.

Both condenser and evaporator sections have copper sealing 
disks brazed over the end of liquid and suction connections. 
The temperature required to make or break a brazed joint is 
high enough to cause oxidation of the copper unless an inert 
atmosphere is provided.

NOTE: 

Dry Nitrogen should flow through the system at all 
times when heat is being applied and until the joint has 

This Split-System (Air Condensing / Heat Pump / Air 
Handling) unit is one component of an entire system. As 
such it requires specific application considerations with 
regard to the rest of the system (air handling unit, duct 
design, condensing unit, refrigerant piping and control 
scheme). 

Failure to properly apply this equipment with the rest of 
the system may result in premature failure and/or 
reduced performance / increased costs. Warranty 
coverage specifically excludes failures due to improper 
application and Unitary Products specifically disclaims 
any liability resulting from improper application.

 Please refer to the equipment Technical Guide, 
Installation Manual and the piping applications bulletin 
247077 or call the applications department for Unitary 
Products @ 1-877-UPG-SERV for guidance.

Содержание J07 Thru 25YC

Страница 1: ...h J07YC Condenser Unit 13 4 Typical Field Wiring Diagram J10 thru J20NC Evaporator Unit with J10 thru J10YC Condenser Unit 14 5 J10 thru J20NC Liquid Line Solenoid Wiring 14 6 Typical Field Wiring Dia...

Страница 2: ...Style A Style A Y Split System Condenser AC R 410A AC Coil Guard AB Phase Monitor 2 Non Pwr d Conv Outlet 1 Disconnect T Options 1 5 S Options 5 D Options 1 2 C Option 2 B Option 1 Options 5 Pwr d Con...

Страница 3: ...d be noted on 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 prod...

Страница 4: ...croll Quantity 1 1 2 1 2 1 2 1 2 1 Nominal Capacity Tons System 1 7 5 10 5 12 5 6 3 15 7 5 20 10 25 System 2 5 6 3 7 5 10 Capacity Stages System 1 1 2 1 2 1 2 1 2 1 2 System 2 1 1 1 1 SYSTEM DATA No R...

Страница 5: ...chitect if the roof is bonded Choose a location with adequate structural strength to support the unit The condensing unit must be mounted on level supports The supports can be channel iron beams or wo...

Страница 6: ...jury Screws on access panels will prevent casual tampering Further safety precautions such as a fenced enclosure or locking devices on the panels may be advisable Check local authorities for safety re...

Страница 7: ...the largest dimension across the unit MUST be used across the top of the unit Units may be moved or lifted with a forklift Slotted openings in the base rails are provided for this purpose LENGTH OF F...

Страница 8: ...15 times as much water as other oils designed for HCFC and CFC refrigerants Take all necessary precautions to avoid exposure of the oil to the atmosphere POE polyolester compressor lubricants are know...

Страница 9: ...2 23 1 36 160 208 230 1 60 3 4 2 3 0 58 0 80 460 3 60 2 12 2 19 87 460 1 60 3 4 2 1 6 30 7 40 575 3 60 2 8 7 14 62 575 1 60 3 4 2 1 4 22 3 30 J15YC 208 230 3 60 2 25 0 39 164 208 230 1 60 1 3 4 2 1 6...

Страница 10: ...4 4 0 24 0 30 J12YC 208 230 3 60 2 22 4 35 149 208 230 1 60 3 4 2 3 0 10 0 66 5 80 460 3 60 2 10 6 17 75 460 1 60 3 4 2 1 6 5 0 32 1 40 575 3 60 2 7 7 12 54 575 1 60 3 4 2 1 4 4 0 24 0 30 J12YD 208 2...

Страница 11: ...tures 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 The li...

Страница 12: ...disks the flow of Nitrogen will prevent any debris from entering the system Unbraze both liquid and suction sealing disks and prepare the joints for connections of the main lines Connect the main liqu...

Страница 13: ...tem 1 piping dimensions when applying a J07 10 12YC model system NOTE On non J NC ND Evaporator models isolation relays must be installed to avoid overloading on 75 VA transformers on the condensing u...

Страница 14: ...NC ND Evaporator models isolation relays must be installed to avoid overloading on 75 VA transformers on the condensing unit Figure 5 J10 thru J20NC Liquid Line Solenoid Wiring THERMOSTAT TWO STAGE C...

Страница 15: ...Unit with J10 thru J20YD Condenser Unit NOTE On non J NC ND Evaporator models isolation relays must be installed to avoid overloading on 75 VA transformers on the condensing unit THERMOSTAT TWO STAGE...

Страница 16: ...lays must be installed to avoid overloading on 75 VA transformer on the condensing unit Figure 8 J10 thru J20NC Liquid Line Solenoid Wiring NOTE Refer to Evaporator unit wiring diagram for control of...

Страница 17: ...orator Unit with Twin Condenser Units NOTE On non J NC ND Evaporator models isolation relays must be installed to avoid overloading on 75 VA transformers on the condensing unit R C Y2 G W1 THERMOSTAT...

Страница 18: ...rator Units with J15YD Condenser Unit NOTE On non J NC ND Evaporator models isolation relays must be installed to avoid overloading on 75 VA transformers on the condensing unit R C Y1 G W1 R C Y1 G W1...

Страница 19: ...ight Dimensions MODEL A J07YC 44 5 J10YC 50 0 J10YD 50 0 J12YC 50 0 J12YD 50 0 LEFT REAR RIGHT FRONT RIGHT 2X 0 875 KNOCKOUT 30 994 2X 1 375 KNOCKOUT CONVENIENCE OUTLET 7 000 10 000 24 000 31 758 7 00...

Страница 20: ...tem 1 piping dimensions when applying a J15 20 25YC model system LEFT RIGHT FRONT REAR FRONT FRONT PIPING DETAIL RIGHT SYSTEM 2 SYSTEM 1 7 000 7 000 23 000 37 000 64 000 2X 0 875 KNOCKOUT 2X 1 375 KNO...

Страница 21: ...tated manually to check for free rotation 4 Are all wiring connections tight 5 Does the available power supply agree with the nameplate data on the unit 6 Is the control circuit transformer set for th...

Страница 22: ...itch opens during normal operation the Simplicity control board will de energize the compressor initiate the ASCD and shut down the condenser fans On startup if the low pressure switch opens the Simpl...

Страница 23: ...rate the condenser unit When the thermostat calls for first stage cooling Y1 the Simplicity control board UCB closes the coils of relays RY1 and BR1 and contactor M1 Relay RY1 has three functions 1 co...

Страница 24: ...Off Off On On 4 Flashes Not Applicable 5 Flashes LPS1 Compressor Lockout Off Off On Off On 6 Flashes Not Applicable 7 Flashes FS1 Compressor Lockout2 2 Freeze Stat not applicable Off Off On On On 8 F...

Страница 25: ...ailure 1 Flash Not Applicable 2 Flashes Control waiting ASCD1 Flashing Off Off On Off 3 Flashes HPS1 Compressor Lockout Off Off Off On On 4 Flashes HPS2 Compressor Lockout Off Off On Off Off 5 Flashes...

Страница 26: ...E While in either Setup mode if no buttons are pushed for 60 seconds the display will revert to its normal display exiting the Option Setup mode When saving the control board only saves the parameters...

Страница 27: ...his chart is applicable to unit 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 Charging Curves J10YC 200 300 400 500 600...

Страница 28: ...his chart is applicable to unit 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 Charging Curves J12YC 200 300 400 500 600...

Страница 29: ...his chart is applicable to unit 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 Charging Curves J15YC 200 300 400 500 600...

Страница 30: ...his chart is applicable to unit 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 Charging Curves J20YC 200 300 400 500 600...

Страница 31: ...is chart is applicable to unit 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 200 300 400 500 600 120 130 140 150 160 17...

Страница 32: ...430648 JIM D 1010 32 Johnson Controls Unitary Products Typical Wiring Diagrams Figure 25 Typical J07YC Condensing Unit Wiring Diagram...

Страница 33: ...430648 JIM D 1010 Johnson Controls Unitary Products 33 Figure 26 Typical J10 12YC Condensing Unit Wiring Diagram...

Страница 34: ...430648 JIM D 1010 34 Johnson Controls Unitary Products Figure 27 Typical J10 12YD Condensing Unit Wiring Diagram...

Страница 35: ...430648 JIM D 1010 Johnson Controls Unitary Products 35 Figure 28 Typical J15YC Condensing Unit Wiring Diagram...

Страница 36: ...430648 JIM D 1010 36 Johnson Controls Unitary Products Figure 29 Typical J15 20YD Condensing Unit Wiring Diagram...

Страница 37: ...430648 JIM D 1010 Johnson Controls Unitary Products 37 Figure 30 Typical J20YC Condensing Unit Wiring Diagram...

Страница 38: ...ed in U S A 430648 JIM D 1010 Copyright 2010 by Johnson Controls Inc All rights reserved Supersedes 430648 JIM C 0610 Johnson Controls Unitary Products 5005 York Drive Norman OK 73069 Figure 31 Typica...

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