Lennox VRB Series Installation & Operation Instructions

Lennox VRB Series Installation & Operation Instructions

Vrf systems. outdoor units
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©2018 Lennox Industries Inc. Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
OWNER FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
!
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed
by a licensed professional HVAC installer (or
equivalent) or service agency.
Failure to follow safety warnings and these
instruc tions exactly could result in property
damage, dan gerous operation, serious injury,
or death.
Any
additions,
changes,
required
in
order
satisfactorily meet the ap plication needs must
be made by a licensed profes sional HVAC
installer (or equivalent) using factory-specified
parts.
Do not use this system if any part has been
under water. A flood-damaged appliance is
extremely
dan gerous.
licensed professional HVAC service technician
(or equivalent) to inspect the system and to
replace all controls and electrical parts that
have been wet, or to replace the system, if
deemed necessary.
VRF
or
conversions
for
the
appliance
Immediately
call
INSTALLATION/OPERATION
INSTRUCTIONS
VRB Heat Recovery
VRF SYSTEMS
507885-03
05/2019
Do not change the settings of any protection
devices installed in the outdoor unit. If the
pressure switch, thermal switch, or other
protection device is shorted or forcibly
operated, fire or explosion may occur.
Do not use parts other than those specified by
Lennox or fire and/or explosion may occur.
As with any mechanical equipment, contact
with sharp sheet metal edges can result in
personal injury. Take care while handling this
equipment and wear gloves and protective
clothing.
The Clean Air Act of 1990 bans the intentional
venting of refrigerant (CFC's and HCFC's) as of
July 1, 1992. Approved methods of recovery,
recycling or reclaiming must be followed. Fines
and/or incarceration may be levied for non-
compliance.
These units must be installed as part of a
matched system as specified in the Product
Specifications (EHB) bulletin.

General

The VRB heat recovery outdoor units are matched
with up to 64 indoor units per system to create a VRF
(variable refrigerant flow) system that uses HFC-
410A refrigerant.
to
Refer to the Product Specification bulletin (EHB)
for the proper use of these heat recovery units with
matching indoor units, mode selection boxes, branch
pipes, line sets and controls.

Shipping and Packing List

Check the components for shipping damage. If you
a
find any damage, immediately contact the last car-
rier. Package 1 of 1 contains the following:
1 - Assembled VRB heat recovery outdoor unit
1 - Outdoor unit installation instruction
1 - Piping accessory package
1
WARNING
!
CAUTION
IMPORTANT

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Summary of Contents for Lennox VRB Series

  • Page 1 INSTALLATION/OPERATION INSTRUCTIONS VRB Heat Recovery ©2018 Lennox Industries Inc. Dallas, Texas, USA VRF SYSTEMS OUTDOOR UNITS 507885-03 05/2019 WARNING Do not change the settings of any protection devices installed in the outdoor unit. If the pressure switch, thermal switch, or other protection device is shorted or forcibly operated, fire or explosion may occur.
  • Page 2 504 = 41 Tons NOTE - Lennox VRF and Lennox Mini-Split products are similar in appearance to each other. Refer to the unit’s model number to determine if the unit is a VRF (V) or Mini-Split (M) unit. It is not possible to mix the two types of equipment on any system.
  • Page 3 Unit Dimensions - inches (mm) CORNER WEIGHTS CENTER OF GRAVITY Model No. lbs. lbs. lbs. lbs. 072, 096, 120 27-3/4 12-1/4 CENTER OF GRAVITY TOP VIEW 52-3/4 (1340) 64-3/8 (1635) 6-1/4 (159) PARALLEL MODULE BACK VIEW FRONT VIEW 18-7/8 (479) PIPING KNOCKOUT LIFTING HOLES 29-7/8 (759)
  • Page 4 Unit Dimensions - inches (mm) CORNER WEIGHTS CENTER OF GRAVITY Model No. lbs. lbs. lbs. lbs. 144, 168, 192 37-3/4 CENTER OF GRAVITY TOP VIEW 68-1/2 (1740) 72 (1829) BACK VIEW 6-1/4 (159) PARALLEL MODULE FRONT VIEW 18-7/8 (479) PIPING KNOCKOUT FORKLIFT SLOT 30 (762) LAG BOLT DESIGNATION...
  • Page 5 Dimensions - Piping Details - inches (mm) Internal valve layouts are the same in both heat Heat Recovery internal valve layouts are described recovery and heat pump units, it is their function that below. See the Heat Pump installation manual for is different.
  • Page 6 Outdoor Unit Placement Considerations WARNING In addition to clearances, the following items should be considered when setting the outdoor unit: Use the provided and specified components • 2007 EPA Noise Policy. Observe local code when installing equipment. Failure to do so may adoptions/enforcement as consideration should result in unit falling, water leaking or electrical be used when selecting an outdoor unit’s perma-...
  • Page 7 Lifting the Unit • Do not hold the air inlet grille while lifting the unit. • Do not touch the fan blades with your hands or This could result in damage to the cabinet. other objects while lifting the unit. SINGLE ROW Air Flow 39 (991)
  • Page 8 NOTICE Drawings in this manual are for illustrative purposes and should not be used as a template for fabricating field-supplied accessories or apparatuses. Consider the environment in which this unit is being installed and make necessary adjustments to ensure safe operation. Local codes prevail.
  • Page 9 Cold Climate Considerations • Install snow guards to prevent snow fall from en- tering air inlet and outlet. Select a location where high winds and snow will not affect the unit. In areas where typical ambient tem- peratures are below 50°F (10°C), the following pre- Wrong Installation Correct Installation cautions should be observed.
  • Page 10 0 WG (0 Pa) Default 0-0.08 WG (0-20 Remove fan guard, < 10 ft. (3 m) duct length Above 0.08 WG Contact Lennox VRF Applications (20 Pa) Support Outlet Wind NOTE - Use dip switch S4 to change outdoor unit static pressure settings.
  • Page 11 D ≥ 24 in. (610 mm) D ≥ 28-3/8 in. (721 mm) E = A + 24 in. (610 mm) E = A + 24 in. (610 mm) Contact the Lennox VRF applications department for assistance with ducting applications 24 in. (610 mm) 28-3/8 in.
  • Page 12 Discharge Duct Pressure Curves VRB120 VRB072 10-ton Air Volume (CFM) 6-ton Air Volume (CFM) 18000 15000 14000 16000 13000 14000 12000 11000 12000 10000 10000 9000 8000 8000 7000 6000 6000 0.04 0.08 0.12 0.16 0.24 0.28 0.32 0.04 0.08 0.12 0.16 0.24...
  • Page 13 • If the unit coil cannot be installed away from Main/Sub Outdoor Unit Placement prevailing winter winds, a wind barrier should • A VRF system consisting of more than two be constructed. Size barrier at least the same outdoor units must be placed in order from the height and width as outdoor unit.
  • Page 14 41 indoor units. ≤ 132 ft. • The following restrictions apply to each VRB sys- Contact the Lennox VRF applications department tem: for assistance. • Total refrigerant pipe length 3280 ft. (1000 m) IMPORTANT! •...
  • Page 15 Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference OUTDOOR UNITS (one or more outdoor units) INDOOR UNITS NOTE - Capacities are shown in parenthesis (024) (024) The first line Branch Pipe (048) (009) Maximum equivalent single piping length - 656 ft.(200 m) Maximum piping length from the first Branch Pipe joint to the farthest indoor unit - 295 ft.
  • Page 16 (120) (144) (192) Lead ODU NOTE - Indoor and outdoor unit (024) capacities are shown in parenthesis. (048) (048) (009) LEGEND Branch Pipe Mode Selection (048) (048) Box (MS) Indoor Unit (024) (018) (018) (018) (048) (048) (009) PIPE AND COMPONENT NAMES Name Designation Outdoor Unit Connection Pipe...
  • Page 17 OUTDOOR UNIT MAIN PIPE SELECTION (L1) Main Pipe Diameter (in.) Equivalent length of all liquid pipes Equivalent length of all liquid pipes Outdoor First First is less than 295 ft. (90 m) is more than 295 ft. (90 m) Unit Branch Branch High...
  • Page 18 Insulation Name Gas Side Joints (inch) Liquid Side Joints (inch) Material (furnished) V8IDBP01 (2 sets) V8IDBP02 (2 sets) V8IDBP03 (2 sets) V8IDBP04 (2 sets) V8IDBP05 (2 sets) Figure 15. Indoor Unit Branch Pipe Kits...
  • Page 19 Figure 16. Mode Selection Box Branch Pipe Kits...
  • Page 20 See figure 19. to ensure correct distribution of refrigerant. • Use a pipe cutter designed for refrigeration tub- • Refer to the Lennox VRF Selection Software ing to cut pipe. (LVSS) pipe sizing diagram to obtain the correct • Discard unused pipe.
  • Page 21 Branch Pipe Kit Placement CAUTION Provide 24 to 36 inches of straight pipe before and after each branch pipe kit to avoid creating refriger- 24 inches (588 mm) minimum straight pipe required ant turbulence and flash points. Failure to follow 24 before and after branch pipe kit to prevent capacity inch minimum guideline can lead to reduced capac- loss,...
  • Page 22 Evacuate System (low pressure gas pipe, high pressure gas pipe • Follow the Lennox pressure test specifications and liquid line pipe) until a positive pressure is in table 1 and the triple evacuation process de- achieved.
  • Page 23 Additional Refrigerant Charge 1. Refer to the LVSS Calculation and Selection 5. Calculate the additional refrigerant charge for report for proper system additional refrigerant each Mode Selection Box using Table 5. charge amount. 6. If the ratio of VMDB or V33B Indoor unit 2.
  • Page 24 VRB432H4M 189.71 86.05 VRB456H4M 215.15 97.60 VRB480H4M 226.19 102.60 Contact the Lennox VRF applications department for assistance If the additional charge for the system exceeds the amount listed in this table or for other assistance with calculating additional refrigerant charge.
  • Page 25 Branch Pipe Kit Calculation Add 1.60 ft. (488 mm) per EACH liquid line branch pipe (incoming pipe size only) for additional charge calculation. Refrigerant Flow Example: The branch pipe kit has an incoming pipe size of 7/8” and outgoing pipe sizes Incoming Liquid Line Pipe of 3/8”...
  • Page 26 Refrigerant Discharge For systems containing more than 110 lb (50 kg) (6.1 m) from any window, ventilation opening, or of R-410A refrigerant, pressure-relief devices and exit in any building. Local codes may lower this fusible plugs shall discharge to the atmosphere charge limit and shall be investigated by the design at a location not less than 15 ft (4.57 m) above engineer.
  • Page 27 • Discard unused pipe. • Do not allow pipe to block outdoor unit access • Refer to the Lennox VRF Selection Software panels. (LVSS) pipe sizing diagram to obtain the correct • Install a reverse trap if needed. inlet and outlet sizes for the installation.
  • Page 28 Oil balance pipe High pressure (1/4 in. diameter) gas balance pipe (3/4 in. diameter) Figure 24. Heat Recovery Parallel Piping Connections Item “N” in outdoor branch pipe kit accessory High Pressure gas balance pipe Ø 3/4 Oil balance pipe Ø 1/4 Item “P”...
  • Page 29 Refer to the pipe sizing diagram in the LVSS Calcu- lation and Selection report to determine pipe sizes. • Branch pipe kits are used to complete the piping for connecting outdoor units. • T-shape connectors are used for balancing pipes only. •...
  • Page 30 Connecting Mode Selection Boxes • The Maximum No. of indoor units per port is 5 • For each mode selection box, dependant on mode selection box size, maximum possible number of connected indoor units is 41. • All indoor units on the same port must operate in the same mode. •...
  • Page 31 Green SV1A-1 SV2A-2 SV3A-3 SV4A-4 SV1A-5 SV2A-6 SV3A-7 SV4A-8 SV1A-9 SV2A-10 SV3A-11 SV4A-12 SV1B-1 SV2B-2 SV3B-3 SV4B-4 SV1B-5 SV2B-6 SV3B-7 SV4B-8 SV1B-9 SV2B-10 SV3B-11 SV4B-12 POWER POWER POWER T1C1 CN16 CN17 CN16 CN17 CN16 CN17 T2C2 CN32 CN32 CN32 DSP1 DSP2 DSP1 DSP2 ENC1 ENC2(0) ENC1 ENC2(1)
  • Page 32 Wiring Connections WARNING NOTE - Each outdoor unit requires a separate power Isolate the power supply before accessing unit supply protected by a suitably sized circuit breaker. electrical terminals. 1. Select the appropriate electrical inlet into the Install unit so that unit disconnect is accessible. outdoor unit.
  • Page 33 Compressor Brown CN4/CN1 Fan A drive board A Left CN1/CN4 Black XP1 XS1 Compressor H-PRO drive board A DC fan drive CN19 P-IN Black board A Blue N-IN CN21 Main board Black Reactor A DC fan drive P-OUT board A AC filter Brown CN4/CN1...
  • Page 34 Compressor Brown CN4/CN1 Fan A drive board A Left CN1/CN4 XP1 XS1 Compressor DC fan drive drive board B CN19 P-IN Blue board A N-IN CN21 Reactor A Black CN19 P-IN P-OUT N-IN CN21 Brown CN4/CN1 Fan B CN15 Reactor B Black Black Right...
  • Page 35 Digital Display 2. Operating Display: When the outdoor unit is in operation, the digital display will provide the 1. Normal Display: When in standby, the digital compressor(s) drive frequency. display will provide the address of the outdoor unit and the quantity of the indoor units discovered. DSP1 DSP2 MENU...
  • Page 36: Lcd Display

    LCD Display DATA ALARM SETTING SERVICES Press to enter Press Enter the menu to confirm Press and hold selection for 3 seconds to exit the menu Up and Down Arrow buttons - Back to previous menu move between selections • The Home screen will display incoming voltage, mode of operation, compressor(s) frequency, and operation status.
  • Page 37: Menu Structure

    Menu Structure 1st Level Menu 2nd Level Menu Display Example Value Description OU ADDRESS Outdoor unit address: 0/1/2 OU CAPACITY 12 TON Outdoor capacity/Ton SYS.CAPACITY 20 TON System capacity/Ton OU QUANTITY Outdoor unit quantity in the system IU QTY. Indoor unit quantity in the system System Data COOLING IU QTY.
  • Page 38 TOTAL CHARGE 999 LBS Field input INSTALLATION INFO COMMISSION 01/20/19 Field input DIP SWITCH Refer to "DIP SWITCH READING" table READING INDOOR TEMP Command, can change all the indoor unit UNIT temperature unit to C/F T4 PRIORITY Field setting, options:50F/60F/70F °...
  • Page 39 Table 9. VRB Electrical Data Model No. VRB072H4 VRB096H4 VRB120H4 Line voltage data - 60 hz - 3 phase 208/230V 460V 208/230V 460V 208/230V 460V Maximum Overcurrent Protection (amps) Minimum circuit ampacity 49.9 26.8 52.4 28.2 54.2 29.5 Compressor No. of compressors Rated load amps 35.5 38.5...
  • Page 40 Settings, Functions and Configurations Turn power off prior to any rotary dial / dip switch Power must be cycled for new configurations to be configuration adjustments. set. Dip Switch Settings and Configurations Dial Switch Settings and Configurations ENC 1 Outdoor Unit Address Setting S2 Outdoor Unit Outdoor unit address assignment ENC1...
  • Page 41 Settings and Functions Symbol Function Item Description Test Operation Cooling Test Service Mode Heating Test Service Mode Manual Defrost Recycle to ODU Refrigerant recycle function Recycle to IDU Recycle to piping Last Fault Code Error and version query Clear Fault History Fan Software Version Demand Control Mode 1 (100%) Demand Control Mode 2 (40%)
  • Page 42 SW3 / SW4 Query Instructions Press SW4 to move FORWARD / NEXT. Press SW3 to move BACKWARD / PREVIOUS. Parameter Description Parameter Value* Recorded Value Outdoor Unit Modular Configuration Address Main 0 / Sub 1 / Sub 2 Singular Module Capacity Outdoor Unit Specific Outdoor Unit Module Qty.
  • Page 43 Parameter Description Parameter Value* Recorded Value Reserved Reserved Reserved Reserved Indoor Unit VIP Address Reserved Reserved Reserved Software Version Reserved Last Recorded Fault Protection Code * Units of temperature are shown as °C, units of pressure are shown as MPa. NOTES - Normal display: When in standby mode, the left position displays the address of the outdoor unit and the right position displays the quantity of indoor units that can communicate with the outdoor unit.
  • Page 44 Electrical Installation for Indoor and Outdoor Units 208/230V 3Ph 60Hz 208/230V 1Ph 60Hz or 460V 3Ph 60Hz Power supply Power supply L2 L3 Dedicated breaker Outdoor Unit (Main Unit) Outdoor Unit(Sub2 Unit) Outdoor Unit (Sub1 unit) L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3...
  • Page 45 Outdoor unit Outdoor unit Outdoor unit (sub1 unit) (main unit) (sub2 unit) H1 H2 Outdoor Unit Communication Terminal Block (H1 H2 (H1 H2 (H1 H2 (PQ) (PQ) (PQ) (PQ) MS Box Communication Terminal Block HA HB 12V COM P (PQ) (PQ) Indoor Unit Communication Terminal Block Ground drain wire or...
  • Page 46: Troubleshooting

    Troubleshooting Digital Display Error Code Definition Communication error between outdoor units Power phase loss error Communication error between indoor and main outdoor unit Outdoor ambient temperature sensor (T4/T10) and condenser pipe temperature sensor (T3A/T3B) error Voltage error Inverter module temperature sensor error Discharge temp sensor error Incorrect ENC 1 Main - Sub Configuration OXE9...
  • Page 48 Technical Support 1-844-GET-VRF1 (1-844-438-8731) vrftechsupport@lennoxind.com www.LennoxVRF.com Download the app from the Apple App Store or the Google Play store.

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