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INSTALLATION MANUAL
R-410A Variable Capacity
Outdoor Split-System Heat Pump
Models: 19 SEER2
YZV, HC20, HL20 Series
2 ton to 5 ton - Single-Phase
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control transformer phasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
System charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical installation clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Alternative installation clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation of vapor line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Underground installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Heat protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Outdoor unit control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical communicating field wiring (air handler/furnace) . . . . . . . . . . 7
Demand response wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Air handler control transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
System charging connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Minimum/maximum operating limit conditions . . . . . . . . . . . . . . . . . . 2
Allowable vertical line sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
R-410A saturation properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Test mode options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Same priority fault storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Status code display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
IMPORTANT: Before starting the system, connect the thermostat to
Wi-Fi using a local network or portable hot-spot so the thermostat
and system receive the latest software updates to optimize system
performance.
CAUTION
!
The EEV is factory installed but shipped in the closed position. Prior
to any brazing, power must be applied to the Indoor Unit. If installing a
coil furnace match or multi-piece air handler system, the EEV har-
ness must be plugged into the Comm port prior to applying power to
the indoor unit. Allow 1 min for the EEV to open to allow proper nitro-
gen flow through the coil and line set. If you are not able to power the
indoor unit before brazing the line set, a tool to manually open the
EEV is available through Source 1 under part number S1-
02649686000.
Section I: General
The outdoor units are designed to be connected to a matching indoor
coil with sweat connect lines. Sweat connect units are factory charged
with refrigerant for a nominal sized matching indoor coil plus 15 ft of
field-supplied lines.
Johnson Controls Ducted Systems
List of sections
Charging charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
System operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Outdoor screen operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Instructing the owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Start up sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
List of figures
Main outdoor control and display. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Heat pump flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Outdoor display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 ton inverter drive LED location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3 ton and 4 ton inverter drive LED location . . . . . . . . . . . . . . . . . . . . 27
5 ton inverter drive LED location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Wiring diagram - 2 ton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Wiring diagram - 3 ton to 5 ton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
List of tables
Outdoor display menu structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outdoor control faults/status code display. . . . . . . . . . . . . . . . . . . . . 18
Inverter drive fault/status code display . . . . . . . . . . . . . . . . . . . . . . . 23
Thermistor resistance vs. temperature table . . . . . . . . . . . . . . . . . . . 29
Sensor connector pin definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Low suction pressure limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Section II: Safety
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service, or maintenance
can cause injury or property damage. Refer to this manual for assis-
tance or for additional information, consult a qualified contractor,
installer, or service agency.
Assembled at a facility with
an ISO 9001:2015-certified
®
Quality Management
System
WARNING
!
6291275-UIM-B-0623
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Table of Contents
Related Manuals for Johnson Controls YZV Series
Summary of Contents for Johnson Controls YZV Series
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Page 1: Table Of Contents
Refer to this manual for assis- with refrigerant for a nominal sized matching indoor coil plus 15 ft of tance or for additional information, consult a qualified contractor, field-supplied lines. installer, or service agency. Johnson Controls Ducted Systems 6291275-UIM-B-0623... -
Page 2: Safety
3/4 in. 3/8 in. 80 ft 25 ft 25 ft 7/8 in. ‡ 1-1/8 in. ‡ 7/8 in/ line set required if line length is over 25 ft or if there is any vertical rise. Johnson Controls Ducted Systems... -
Page 3: Typical Installation Clearances
6291275-UIM-B-0623 Figure 1: Typical installation clearances Figure 2: Alternative installation clearances Johnson Controls Ducted Systems... - Page 4 Refer to the price pages for the specific part number for your applica- problems caused by insufficient refrigerant flow. For the heat pump, tion. maintain level horizontal refrigerant lines between the indoor unit and the outdoor unit to facilitate proper oil return. Johnson Controls Ducted Systems...
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Page 5: Precautions During Line Installation
2. Braze the liquid line to the liquid valve at the outdoor unit. Make sure to wrap the valve body with a wet rag. Allow the nitrogen to continue flowing. 3. Carefully remove the plugs from the liquid and vapor connections at the indoor coil. Figure 4: Underground installation Johnson Controls Ducted Systems... -
Page 6: Section Iv: Evacuation
5. Make the power supply connections to the supplied terminal block. Do not connect manifold gauges unless trouble is suspected. Approx- imately 3/4 ounce of refrigerant will be lost each time a standard man- ifold gauge is connected. Johnson Controls Ducted Systems... -
Page 7: Outdoor Unit Control Box
Use a wire nut to bundle the excess wires at each end. A single wire should then be connected to “chassis ground” (near the transformer or ground lug) as shown in Figure 7. Figure 7: Typical communicating field wiring (air handler/furnace) Johnson Controls Ducted Systems... -
Page 8: Section Vi: Control Transformer Phasing
For a modular air handler, measure the return air static pressure Figure 9: Air handler control transformer between the indoor coil and entering air side of the modular air han- dler. Johnson Controls Ducted Systems... -
Page 9: Charging The Unit
6. Permanently mark the unit data plate with the total amount of refrig- erant in the system. Johnson Controls Ducted Systems... -
Page 10: Servicing The Unit
The unit includes a cooling charging chart. The subcooling charging charts and the heating charging charts are located in Section VIII: Charging charts. Table 3: R-410A saturation properties Temperature (°F) Pressure (psig) Temperature (°F) Pressure (psig) Temperature (°F) Pressure (psig) — — — — Johnson Controls Ducted Systems... -
Page 11: Section Viii: Charging Charts
516 (5) 532 (8) 532 (8) 535 (8) 539 (8) Note: The charging chart is for use only in service and cooling modes. Note: The charging chart is for use only in service and cooling modes. Johnson Controls Ducted Systems... - Page 12 281 329 376 296 342 388 293 336 379 302 348 394 313 363 413 294 345 397 258 304 351 1525-1575 Subcool 19 19 19 27 27 Suction pressure 137 138 138 105 106 107 90 90 91 46 48 Johnson Controls Ducted Systems...
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Page 13: Test Mode Options
Initiate defrost cycle and record that defrost cycle was initiated in test mode. This option is not available if a START FORCED DEFROST call for space conditioning is present from the Hx thermostat. This operation applies only to heat pump sys- tems. Johnson Controls Ducted Systems... -
Page 14: Same Priority Fault Storage
0.1 sec ON/0.1 sec OFF Yellow > 0, ASCD timer not expired No faults/events active, compressor speed System is active and presently communicating successfully 0.5 sec ON/0.5 sec OFF Yellow > 0, ASCD timer not expired Johnson Controls Ducted Systems... -
Page 15: Section X: Outdoor Screen Operation
Press Menu > 5 s to the General Display Operation 2. No active call, high voltage is applied A. The control scrolls and displays * STANDBY * when there are no active calls for compressor operation. Johnson Controls Ducted Systems... -
Page 16: Outdoor Display Menu Structure
TEMP 55F OFF (Default) TEMP 5F TEMP 10F TEMP 15F TEMP 20F TEMP 25F AUX HEAT LOCKOUT (Sets balance point) TEMP 30F TEMP 35F TEMP 40F TEMP 45F TEMP 50F TEMP 55F Continued on next page. Johnson Controls Ducted Systems... -
Page 17: Charge Verification
Superheat calculated value. • Time Out Period: While in the menu structure, if the display does not sense a navigational response within 5 min, the outdoor dis- play returns to General Display Operation. Johnson Controls Ducted Systems... -
Page 18: Outdoor Control Faults/Status Code Display
System in high-pressure didn't switch and actuation. switch lockout (last HPS SOFT Defrost – mode (Solid) LOCKOUT – DEFROST See other of operation was defrost) causes above – from cooling Continued on next page. Johnson Controls Ducted Systems... - Page 19 See Ambient Sensor failure. – – Sensor failure HARD LOCKOUT Coil sensor failure COIL TEMP See Ambient See Ambient Sensor failure. – (short) not in lockout yet (Solid) SENSOR – SHORT Sensor failure Continued on next page. Johnson Controls Ducted Systems...
- Page 20 0.5 VDC to 4.5 VDC replace sensor. If voltage across WHT and BLK Bad OD reads between 0.5 VDC to 4.5 control board VDC but fault still exists, replace OD control board. Continued on next page. Johnson Controls Ducted Systems...
- Page 21 Bring the temperature Cooling temperature within design parameters out of range found in the IOM. HIGH DISCHARGE High discharge See High TEMP – SOFT LOCK- See High Discharge Temp. – temperature (Solid) Discharge Temp Continued on next page. Johnson Controls Ducted Systems...
- Page 22 See Low Suction Pressure. – pressure (Solid) Pressure SOFT LOCKOUT LOW SUCTION Low suction See Low Suction PRESSURE – See Low Suction Pressure. – pressure (Solid) Pressure HARD LOCKOUT 1. See Figure 11 for Outdoor Control LED location. Johnson Controls Ducted Systems...
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Page 23: Current Foldback
DC BUS UNDER DC Bus Under Voltage LED604/LED2 VOLTAGE – Check the line voltage if it is INVERTER DRIVE < 187 VAC (if low, contact utility provider). Damaged inverter Replace drive. board Continued on next page. Johnson Controls Ducted Systems... - Page 24 Processor self-check remains, replace drive. MICROELECTRONIC FAULT – INVERTER DRIVE Remove power to drive for 2 min. Digital Signal EEPROM Fault LED 603/LED3 Reapply power. If problem Processor self-check remains, replace drive. Continued on next page. Johnson Controls Ducted Systems...
- Page 25 Damaged OD 2 min. Reapply power. If problem control board remains, replace OD control board. Remove power to drive for 2 min. Reapply power. Damaged inverter board If problem remains, replace drive. Continued on next page. Johnson Controls Ducted Systems...
- Page 26 Outdoor airflow is too Verify proper airflow low or off over the drive heat sink. Board Temp High LED 2 Inverter component Replace drive. damage 1. See Figure 13 to Figure 15 for LED inverter drive locations. Johnson Controls Ducted Systems...
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Page 27: Ton Inverter Drive Led Location
6291275-UIM-B-0623 Figure 14: 2 ton inverter drive LED location Figure 15: 3 ton and 4 ton inverter drive LED location Johnson Controls Ducted Systems... -
Page 28: Electrical Shock Hazard
Protection Indicating LED (Yellow - 2 or 604) - When the drive is in operation, the LED is solid. under protection, the yellow LED flashes. See the fault status and trou- bleshooting sections in this manual for more information. Johnson Controls Ducted Systems... -
Page 29: Thermistor Resistance Vs. Temperature Table
280.4 59.0 15714 170.6 1385 282.2 60.8 15000 172.4 1340 284.0 62.6 14323 174.2 1297 285.8 64.4 13681 176.0 1255 287.6 66.2 13071 177.8 1215 289.4 68.0 12493 179.6 1177 291.2 69.8 11942 181.4 1140 293.0 Johnson Controls Ducted Systems... -
Page 30: Sensor Connector Pin Definition
During a Defrost Cycle the system indicates the current mode of the defrost operation on the outdoor display. While in a Time Temperature Defrost the outdoor display indicates DEFROST TT (ACTIVE). Johnson Controls Ducted Systems... -
Page 31: Defrost Operation Curves (Variables - Defrost Active Variable)
Upon completing the calibration process, the system • Communicates the W1 for auxiliary heat returns to the same place in the control algorithm. The system commu- nicates the ID airflow for the proper compressor speed being operated during the calibration process. Johnson Controls Ducted Systems... -
Page 32: Section Xi: Instructing The Owner
6 h timer is cleared and the PS fault counter is reset. of this unit. Note: The cooling charge table is on the unit code plate attached to the outside of the control box cover. Johnson Controls Ducted Systems... -
Page 33: Section Xii: Wiring Diagrams
SEE UNIT V(C) INSTALLATION W(R) OD FAN OD FAN INSTRUCTIONS FOR COMPRESSOR MOTOR CONTROLLER LOW VOLTAGE USE COPPER TERMINATIONS CONDUCTORS ONLY 208-230 VAC 60 Hz 1 PHASE SUPPLY 5295815-UWD-D-0319 Figure 18: Wiring diagram - 2 ton Johnson Controls Ducted Systems... -
Page 34: Wiring Diagram - 3 Ton To 5 Ton
USE COPPER TERMINATIONS CONDUCTORS ONLY 208-230 VAC 60 Hz 1 PHASE SUPPLY 5294667-UWD-D-0319 Figure 19: Wiring diagram - 3 ton to 5 ton Third-Party Trademarks Notice: For information about third-party trademarks, refer to the relevant company websites. Johnson Controls Ducted Systems... -
Page 35: Section Xiii: Start Up Sheet
Supply air wet bulb temperature Return static (inches of water column) Return air dry bulb temperature Return air wet bulb temperature Outside air dry bulb temperature Total external static pressure Temperature drop Page 1 of 2 (3/14/17) Johnson Controls Ducted Systems... - Page 36 Humid Comments and Additional Job Details Page 2 of 2 (3/14/17) Subject to change without notice. Published in U.S.A. 6291275-UIM-B-0623 Copyright © 2023 by Johnson Controls. All rights reserved. Supersedes: 6291275-UIM-A-1122 York International Corp. 5005 York Drive Norman, OK 73069...
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