Lennox VRF VVCA Series Installation Instructions Manual
Lennox VRF VVCA Series Installation Instructions Manual

Lennox VRF VVCA Series Installation Instructions Manual

Vertical air handler

Advertisement

©2017 Lennox Industries Inc. Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, ser vice or
maintenance can cause property damage, personal
injury or loss of life.
Installation and service must be performed by a li censed
professional HVAC installer, service agency or the gas
supplier.
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, or conversions required in order
for the appliance to 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.
Immediately call a 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.
CAUTION
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.
VRF
1
INSTALLATION
INSTRUCTIONS
VVCA Vertical Air Handler
VRF SYSTEMS -- Air Handler
507539-05
11/2018
General
The VVCA air handler is designed for indoor installation
only. As shipped, the unit is ready for installation in upflow
and horizontal-right air discharge applications. Field-
configurable for horizontal left-air discharge.
The unit has accessible electrical controls, refrigerant
piping connections and an internally mounted expansion
valve kit. This unit is also equipped with variable speed
blower motor.
Refer to the Product Specification bulletin (EHB) for the
proper use of these indoor units with specific heat pumps,
heat recovery units, mode switching devices, branch
pipes, line sets and controls.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
The air handler is shipped from the factory completely
assembled. This unit is provided with flanges for
connecting the supply plenum.
Shipping and Packing List
Check the components for shipping damage. If you
find any damage, immediately contact the last carrier.
Package 1 of 1 contains the following:
1 - Assembled indoor unit
2 - Condensate plugs
2 - Rubber grommets
1 - Water level switch cable
1 - 5/8 to 1/2 adapter (VVCA018)
1 - 3/8 to 1/4 adapter (VVCA018)
1 - Water level switch cable
1 - Installation manual
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting
of refrigerant (CFCs, HCFCs and HFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance. These units must be
installed as a part of a matched system as specified in
the Product Specifications (EHB) bulletin.

Advertisement

Table of Contents
loading

Summary of Contents for Lennox VRF VVCA Series

  • Page 1 INSTALLATION INSTRUCTIONS ©2017 Lennox Industries Inc. Dallas, Texas, USA VVCA Vertical Air Handler VRF SYSTEMS -- Air Handler 507539-05 11/2018 General The VVCA air handler is designed for indoor installation only. As shipped, the unit is ready for installation in upflow and horizontal-right air discharge applications.
  • Page 2: Safety Requirements

    Note - Only Lennox VRF indoor units will work with Lennox VRF outdoor units and associated mechanical equipment. Lennox Mini Split indoor units are similar in appearance but must not be connected to a Lennox VRF refrigerant circuit. Please refer to model numbers to confirm compatibility. Model numbers for Lennex VRF units start with a “V” and model numbers for Lennox Mini-Splits start with a “M”.
  • Page 3: Top View

    Dimensions - inches (mm) Upflow Position Shown TOP VIEW 3/4 (19) 10-1/4 (260) SUPPLY AIR LINE VOLTAGE INLETS (Top and Either Side) LOW VOLTAGE INLETS (Top and Either Side) AIR FLOW 1-5/8 (41) 1-1/4 (32) SUCTION LINE (76) LIQUID LINE CONDENSATE DRAIN RETURN AIR RETURN AIR...
  • Page 4: Parts Identification

    Clearances Model No. 18-36 48-54 Cabinet 0 inch (0 mm) 0 inch (0 mm) To Plenum 0 inch (0 mm) 0 inch (0 mm) To Outlet Duct within 3 feet (914 mm) 0 inch (0 mm) 0 inch (0 mm) Service / Maintenance See Note #1 Front service access - 24 inches (610 mm) minimum.
  • Page 5 Indoor Unit Placement IMPORTANT In addition to clearances, the following items should be This unit is approved for installation clearance to considered: combustible material as stated on the unit rating plate. Accessibility and service clearances must take precedence over combustible material clearances. WARNING Excessive condensation may occur if the unit is installed Use the provided and specified components when...
  • Page 6: Installation

    NOTE - When the unit is installed in horizontal applications, Installation a secondary drain pan is recommended. Refer to local codes. Adequate support must be provided to ensure It is important to locate the unit where it can be accessed cabinet integrity.
  • Page 7 Horizontal Application Horizontal-Left Conversion 1. Determine knockouts required drain line 1. Remove the coil section panel and the blower section connections. panel. 2. Remove the T-2 and T-2B sensors from the sleeves. 2. With access door removed, remove drain line opening to install drain lines.
  • Page 8 6. Use a 1” hole cutter bit to create a wiring passthrough in the coil housing front panel. 7. Clean all of the burrs from the newly cut hole. Insert a grommet into the hole. 8. Seal the factory-provided T-1 outlet hole with UL listed foil tape.
  • Page 9: Refrigerant Piping Connections

    Refrigerant Piping Connections WARNING Refrigerant leaks are unlikely; however, if a refrigerant leak occurs, open a door or windows to dilute the refrigerant in the room. Turn off the unit and all other appliances that may cause a spark. Call a licensed professional HVAC technician (or equivalent) to repair the leak.
  • Page 10: Brazing Refrigerant Lines

    1. The seal on the unit refrigerant piping connections Brazing Refrigerant Lines should remain in place until the last possible moment. Refrigerant lines must be connected by a qualified This will prevent dust or moisture from getting into the refrigerant piping before it is connected. technician in accordance with established procedures.
  • Page 11 6. Route the drain line to the outside or to an Condensate Piping Connections appropriate drain. Drain lines must be installed The air handler is provided with ¾” NPT condensate so they do not block service access to the front of the air handler.
  • Page 12 Sloping The Unit IMPORTANT Make sure the unit is sloped (similar to the slope shown in figure 12) (horizontal or vertical) so that the drain pan will If an elbow is included in the plenum close to the unit, it must not be smaller than the dimensions of the supply empty completely without water standing in the pan.
  • Page 13: Wiring Connections

    Wiring Connections 1. Remove the screws that secure the control box cover. Remove the cover and place it to the side where it will not be damaged. WARNING 2. Locate the terminal strip in the control box. Connect the power wiring (sized per NEC/CEC and local Isolate the power supply before accessing unit electrical terminals.
  • Page 14: Main Control Board

    W IR E D DISPLAY BOARD C ON T ROLL ER CO N TR OL INTE R FACE WIRE D CONT ROL L ER MO D UL E CN1 1 CN2 0 CN1 5(WH I TE) CN1 0(YELL OW) P O WE R _ S CN16 SW 2 ENC 1...
  • Page 15 ALARM FAN CTON HTON AUXH HHE interface Current range (0~1A) Voltage range (0~AC/DC24V) COMPONENT NOTE INDOOR FAN COMPONENT IN DASH ELECTRONIC LINE IS OPTIONAL EXPANSION VALVE OR FIELD WIRING INLET AIR TEMP. EVAP OUTLET TEMP IN COOLING MODE COIL TEMP. PLUG XP1-10 XS1-10...
  • Page 16 Indoor units and MS boxes on the same refrigeration Indoor unit and MS box power supply MUST not be taken from the outdoor unit. Always follow NEC/CEC and Local circuit should have a common power supply but must have an independent disconnect switch installed adjacent Codes.
  • Page 17 Outdoor Unit Outdoor Unit Outdoor Unit (Main Unit) (Sub1 Unit) (Sub2 Unit) (H1H2E) (H1H2E) (H1H2E) (PQE) (PQE) (PQE) Mode Mode Selection Selection Ground cable shield DO NOT connect to E (PQE) (PQE) (PQE) (PQE) (PQE) (PQE) (PQE) (PQE) Install a terminating resistor at terminals P and Q for each individual unit when connected directly to an MS Box port.
  • Page 18 Outdoor unit Outdoor unit Outdoor unit (main unit) (sub1 unit) (sub2 unit) (H1 H2 E) (H1 H2 E) (H1 H2 E) (PQE) Ground cable shield DO NOT connect to E (PQE) Install a terminating resistor at the last indoor unit terminals P and Q of the daisy chain.
  • Page 19 ELECTRIC HEAT DATA 018-036 VVCA018H4 Blower Speed Blower Motor Minimum Maximum Input Description Full Load Circuit Overcurrent Medium High Amps Ampacity Protection Volt Btuh V8EH0050P-1P (13P59) 208 5 kW 12,800 26.8 • • • 14,300 27.8 • • • 15,700 28.8 •...
  • Page 20 ELECTRIC HEAT DATA 036-054 VVCA036H4 Blower Motor Blower Speed Input Minimum Maximum Description Full Load Circuit Overcurrent Volt Btuh Medium High Amps Ampacity Protection V8EH0050P-1P (13P59) 208 5 kW 12,800 28.3 • • • 14,300 29.3 • • • 15,700 30.3 •...
  • Page 21: Airflow Performance

    Airflow Performance External Static Pressure-Inches W.C.[kPa] Model Nominal Motor 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17] 0.8[.20] Number Cooling Speed Watts Watts Watts Watts Watts Watts Watts Watts 33.1 50.2 66.5 86.7 105.2 45.2 62.6 85.2 122.2 1.5 Ton 60.2 80.2 98.4 118.3...
  • Page 22: Air Filter

    Air Filter Removal Air Filter 1. Remove screws, remove filter cabinet cover. 2. Remove air filter. WARNING 3. Clean the air filter using vacuum or water. For heavy Do not operate the system without filters. A portion of accumulations, use soft brush and mild detergent. the dust entrained in the air may temporarily lodge in the 4.
  • Page 23 NOTE - The indoor unit temperature unit display must be Network Address and Commissioning set at the same time as the controller. Indoor units default to display temperatures in °F. To change the indoor unit After the system has been installed, each indoor temperature unit display, press and hold the Manual unit must be assigned an address as part of the button on the unit receiver for 5 to 15 seconds until the...
  • Page 24: Troubleshooting

    Troubleshooting The unit is equipped with a receiver that has a digital 2. Press the ON/OFF button a second time to reapply display that provides an error code. power to unit. • Refer to the table below to view the error codes. 3.
  • Page 25 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.

Table of Contents