Panasonic mva18fbas6hbcp, mva24fbas6hbcp, mva30fbas6hbcp, mva36fbas6hbcp, mva42fbas6hbcp Operation Manual

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MVA Series Air Handling Unit

Installation, Operation and Maintenance

Manual

MVA Series units are direct drive vertical and multi-position Air Handlers delivering nominal cooling capacities of 1.5 to 5 tons. Units

may be specified with hot water or electric heating coils to meet space cooling loads or heating loads or both. Two styles of unit orientation are available for maximum flexibility.

How to Use this Manual:

This manual gives instructions regarding installation, operation and maintenance for the MVA Series air handling units.

Use these instructions in conjunction with other appropriate instructions, including but not limited to those instructions supplied with the outdoor unit. Installation must comply with all applicable local codes.

SAFETY WARNING:

Installer should pay particular attention to the following words: NOTE–intended to clarify or make installation easier. CAUTION–given to prevent equipment damage. WARNING–to alert installer that personal

injury and/or equipment damage may result if installation procedure is not properly followed.

GENERAL

Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations and are experienced with HVAC equipment of this type.

WARNING: Sharp edges, coil surfaces and rotating fans are a potential injury hazard – avoid contact.

WARNING: Hazardous voltage – Disconnect and Lock Out all incoming power sources before servicing or installing unit. ELECTRIC SHOCK CAN CAUSE DEATH.

WARNING: This equipment may be installed well above finished floor—Use extreme caution when working at heights.

UNPACKING-CHECK FOR DAMAGE!

Immediately inspect each unit for damage upon receipt.

 Inspect units for external and concealed

damage immediately.

 File any damage claims in accordance

with the Freight Damage Policy and Terms and Conditions.

 Do not repair damaged units without

written authorization.

 Protect stored units from damage.

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MVA Series Air Handling Unit

Installation, Operation and Maintenance

Manual

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and Service

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Topic Page

SAFETYCONSIDERATIONS PRODUCT NOMENCLATURE

UNPACKING INSTALLATION

Pre-installation Rigging Unpackaging Service Clearances Return Air & Unit Orientation Vertical to Horizontal Conversion (EEV) Unit Suspension or Floor Mount Condensate Drain Ductwork Refrigerant Piping Electric Heater Accessory Electrical

START-UP

Fan Airflow Step-Up Airflow Data

SERVICE

Fan & Fan Motor Filters Access Panels

Coil & Drain Pan Service ELECTRICAL RATINGS DIMENSIONS Startup Report

1, 5

6-7

8 8

8 8 8

8,11

8,12,13

12 12

14 14-15 16-21 22-23 23-24 23-24 25-28 25-26

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DANGER

NEVER enter an enclosed fan cabinet or reach into a unit while the fan is running. LOCK OPEN AND TAG the fan motor power disconnect switch before working on a fan. Take fuses with you and note removal on tag. Electric shock can cause personal injury or death. LOCK OPEN AND TAG the electric heat coil power disconnect switch before working on or near heaters. Failure to follow these warnings could lead to personal injury or death.

WARNING

CHECK the assembly and component weights to be sure that the rigging equipment can handle them safely. Note also, the centers of gravity and any specific rigging instructions. CHECK for adequate ventilation so that fumes will not migrate through ductwork to occupied spaces when welding or cutting inside air-handling unit cabinet or plenum. WHEN STEAM CLEANING COILS be sure that the area is clear of personnel. DO NOT attempt to handle access covers and removable panels on outdoor units when winds are strong or gusting until you have sufficient help to control them. Make sure panels are properly secured while repairs are being made to a unit. DO NOT remove access panel fasteners or open access doors until fan is completely stopped. Pressure developed by a moving fan can cause excessive force against the panel which can injure personnel. DO NOT work on dampers until their operators are disconnected. BE SURE that fans are properly grounded before working on them. Failure to follow these warnings could result in personal injury or equipment damage.

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PRODUCT NOMENCLATURE

Unit Type/Size Code Selection 01, 02 MV

Generation/Series Code Selection

03 A

Unit Type/Size Code Selection NOM Capacity

18 24 30

04, 05

Primary Coil Type Code Selection

36 42 48 60

Description

Direct Drive Multiposition air handling unit

Description

Revision Level

Description

18,000 Btu/hr 24,000 Btu/hr 30,000 Btu/hr 36,000 Btu/hr 42,000 Btu/hr 48,000 Btu/hr 60,000 Btu/hr

Description

4 ROWDX with electronic expansion valve,R-410a

HeatingCoil Code Selection

Future Use Description Code Selection

Unit Grade Description Code Selection

Description

Electric Heat Ready (readyto accept field installed EH Accessory kit, ordered

Future Use

Standard

separately)

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Selection

OrderingNumber

Selection

PRODUCT NOMENCLATURE—CONT’D

Unit Voltage Code

Controls Code

11 H

ReturnAir Cabinet Options

Code

DrainPan Code

Tracking Description Code

Description

208/230/1/60 ECM-VE(customer change transformer tapfor 208V)

Description

Internal Use

Description

Unit Orientation

Vertical (Front RH Cond

Drain Cnx)or Horizontal

Right

Description drain panandcabinet insulationtype

Fiberglass, Universal Drainpan - Galvanized

Internal Use

ReturnLocation

Bottom Return

Accessory Electric Heater Kits

P/N Description Unit Size Power kW*

012-000458-001 FC EH-HEATER MVA-3-1-240 3KW MVA18-60 240/1/60 3 012-000458-002 FC EH-HEATER MVA-5-1-240 5KW MVA18-60 240/1/60 5

012-000458-003 FC EH-HEATER MVA-6-1-240 6KW MVA18-60 240/1/60 6 012-000458-004 FC EH-HEATER MVA-8-1-240 8KW MVA18-60 240/1/60 8 012-000458-005 FC EH-HEATER MVA-9.5-1-240 9.5KW MVA18-60 240/1/60 9.5

*Note: If unit power is 208V/1ph/60Hz, then the kW is reduced to 75% of the table value.

Accessory Filter Kits

P/N Description

473-550115-001 2" FILTER RACK MERV 8 - MVA18/24 473-550115-002 2" FILTER RACK MERV 8 - MVA30/36 473-550115-003 2" FILTER RACK MERV 8 - MVA42/48 473-550115-004 2" FILTER RACK MERV 8 - MVA60 473-550116-001 4" FILTER RACK MERV 13 - MVA18/24 473-550116-002 4" FILTER RACK MERV 13 - MVA30/36 473-550116-003 4" FILTER RACK MERV 13 - MVA42/48

473-550116-004 4" FILTER RACK MERV 13 - MVA60

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INSTALLATION

Pre-installation

1. Check items received against packing list.

2. Do not stack unit components or accessories during storage. Stacking can cause damage or deformation.

3. If unit is to be stored for more than 2 weeks prior to installation, observe the following precautions:

a. Choose a dry storage site that is rea-

sonably level and sturdy to prevent undue stress or permanent damage to the unit structure or components. Do not store unit on vibrating surface. Damage to stationary bearings can occur. Set unit off ground if in heavy rain area.

b. Remove all fasteners and other small

parts from jobsite to minimize theft. Tag and store parts in a safe place until needed.

c. Cover entire unit with a tarp or plastic

coverall. Extend cover under unit if stored on ground. Secure cover with adequate tie-downs or store indoors. Be sure all coil connections have protective shipping caps.

d. Monthly — Remove tarp from unit, en-

ter fan section through access door or through fan inlet, and rotate fan and motor slowly by hand to redistribute the bearing grease and to prevent bearing

corrosion. Rigging — Do not remove shipping skids or protective covering until unit is ready for final placement. Use slings and spreader bars as applicable to lift unit. Do not lift unit by coil connec-

tions or headers.

Do not remove protective caps from coil piping connections until ready to connect piping.

WARNING-AUXILIARY DRAIN PAN RECOMMMENDED:

This product has an auxiliary condensate drain which should be piped to a condensate overflow sensor or safe drain location or both to protect the equipment and property from damage in the case of condensate overflow.

In addition, the International Mechanical Code (IMC) section 307.2.3 requires the use of auxiliary drain pans. Many municipalities have adopted this code.

This practice represents the standard for professional installation whether or not this code has been adopted in a specific municipality or territory. As such, water damages that would have been prevented had an auxiliary pan been deployed will not be considered for compensation. This position is taken regardless of whether the source of the moisture was specified as a potential failure mode in the applicable building code or not. A freeze burst, cracked drain pan, failed weld, or corrosion induced leak are some of the potential failure modes that are mitigated when an auxiliary pan is properly installed. Professional installers recognize the value of protecting customer assets against foreseeable events. Customers who choose to avoid the cost of common protective measures waive their right to seek damages when those foreseeable events occur. If the product is located above a living space or where damage may result from condensate overflow, install a watertight pan of corrosion-resistant metal beneath the unit to catch over-flow which may result from clogged drains or from other reasons. Provide proper drain piping for this auxiliary pan. Consult local codes for additional precautions before installation.

Unpackaging

1. Remove all packaging and any foreign material from unit.

2. Check blower wheel for free rotation.

3. Check copper lines, coil etc. for internal or hidden damage.

Return Air and Unit Orientation

Units may be positioned in several configura-

tions depending on the return air configuration selected—see Figure 1.

NOTE: Right and left return units are not recommended for horizontal installation.

Service Clearance

inches) of clearance. This allows substantial freedom in the positioning of the unit to best serve the requirements of the structure.

Unit Support

Floor mounting: Unit may be mounted on a housekeeping pad, floor, platform or plenum. Provide a suitable isolation pad to minimize sound transmission to the structure. CAU-

TION! Make sure to allow enough elevation to permit construction of the condensate trap. Also allow enough elevation and clearance for opening the filter door (removes to the front). See Service Clear-

ances.

The fan coil is completely serviceable from

the front. Units are approved for 0” (zero

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INSTALLATION

NOTE:

Electronic Expansion Valve (EEV) must be oriented vertically, and is shipped for vertical cabinet orientation.

For horizontal cabinet orientation, follow procedure to rotate the EEV assembly. Refer to Figure 2.

Return Configurations and

Unit Orientations

WARNING

FOR HORIZONTAL CABINET ORIENTATION, EEV MUST BE ROTATED TO VERTICAL POSITION! Failure to reorient the EEV can result in improper unit operation or equipment damage or dangerous condition.

Figure 1

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INSTALLATION—VERTICAL TO HORIZONTAL CONVERSION—EEV ROTATION

WARNING

FOR HORIZONTAL CABINET ORIENTATION, EEV MUST BE ROTATED TO VERTICAL POSITION! Failure to reorient the EEV in VERTICAL position can result in improper unit operation or equipment damage or dangerous condition.

CONVERSION PROCEDURE:

1. UNIT IS SHIPPED WITH NITROGEN CHARGE. IF UNIT HAS ALREADY BEEN CHARGED WITH REFRIGERANT, REMOVE REFRIGERANT CHARGE PER LOCAL CODES BEFORE PERFORMING CONVERSION PROCEDURE.

2. REMOVE PIPING PLUGS AND SAVE FOR LATER USE. NITROGEN WILL DISCHARGE FROM COIL.

3. REMOVE PIPING GROMMETS; REMOVE LIQUID INLET CAP FOR HORIZONTAL POSITION.

4. REMOVE BLOWER PANEL, LEFT AND RIGHT COIL PANELS

5. SECURE EEV BRACKET WITH WRENCH AND TURN COUPLING FLANGE NUT COUNTER CLOCKWISE WITH 3/4" WRENCH TO LOOSEN AND DISCONNECT COUPLING. THE COUPLING TAIL NUT SHOULD BE ALLOWED TO TURN FREELY.

6. REPOSITION EXPANSION VALVE ASSEMBLY AS SHOWN IN FIGURE 2d. ENSURE EXPANSION VALVE IS VERTICAL WITHIN +/- 15 DEG WITH UNIT INSTALLED IN HORIZONTAL POSITION

7. REATTACH COUPLING AND TIGHTEN TO 10-12 FT LBS WHILE SECURING EEV BRACKET WITH WRENCH.

8. AS AN ALTERNATIVE TO STEP 5 COUPLING MAY BE TIGHTENED UNTIL NO THREADS ARE SHOWING AND COUPLING IS BOTTOMED OUT. THEN TURN AN ADDITIONAL 60 DEG (OR ONE HEX FLAT) TO TIGHTEN.

9. REINSTALL FRONT PANELS, GROMMETS, AND PIPING PLUGS.

Figure 2a-

Vertical

Orientation

Figure 2b-

Vertical

Orientation

Figure 2d-Horizontal

Orientation

EEV BRACKET

Detail A-

EEV Detail

EEV INVERTICAL

ORIENTATION

Figure 2c-Vertical

Orientation, Panels

Removed

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INSTALLATION—SERVICE CLEARANCES

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INSTALLATION

Install the unit so that it is level or pitches slightly –(1/8 inch) – toward the condensate drain connection.

Anchor the unit to the plenum or platform through the bottom flange using 2ea #10 sheet metal screws on each side (4 screws total).

Ceiling Suspension: Mount the unit in ceilingsuspended horizontal orientation per suspension details (Figure 4). Unit is NOT intended to be wall mounted. Consult a qualified structural engineer for special mounting considerations.

WARNING

INSURE THAT THE UNIT IS ADEQUATELY SUPPORTED FROM STRUCTURE TO PREVENT DAMAGE OR INJURY CAUSED BY FALLING EQUIPMENT! If uncertain about how to connect to the structure, consult a qualified structural engineer.

Install the unit so that it pitches slightly –(1/8 inch) – toward the condensate drain connection.

NOT TO SCALE

MAINTAIN THESE DIMENSIONS FOR ADEQUATE TRAP SEAL:

A = 3.5” MINIMUM B = 2.0” MINIMUM

NOTES:

1. CONDENSATE DRAIN PIPING RECOMMENDATIONS:

A. MINIMUM 3/4” Φ PIPE SIZE

B. COPPER OR PVC PIPE MATERIAL C. USE DIELECTRIC UNION FOR DISSIMILAR METALS. D. INSULATE PER PROJECT SPECIFICATIONS.

2. PAD OR PLENUM HEIGHT AS REQUIRED TO INSTALL TRAP AND CONDENSATE DRAIN PIPING.

3. AVOID BLOCKING FILTER SERVICE ACCESS WHEN INSTALLING CONDENSATE DRAIN PIPING.

Fig. 3 — Condensate Drain

Condensate Drain

Install a trapped condensate drain line at unit drain connection. All MVA units have 3/4 in. FPT condensate main and auxiliary drain connections. Provide adequate trap clearance (trap depth) beneath the unit as indicated in Fig. 3. Provide freeze-up protection as required to insure reliable condensate drainage. Freeze protection measures are customer-supplied and installed.

Pipe to condensate drain using PVC or copper or other suitable material. Pitch drain piping downward at a minimum slope of 1/8 inch per foot.

Pipe auxiliary drain to “tell tale” drain location or floor drain to clearly indicate when condensate drain service is required. Alternately, use a fieldprovided condensate overflow detection device in the auxiliary drain connection to provide alarm or other controls action when the drain pan fills to the level of the auxiliary drain.

Placing Unit In Ductwork

1. Utilize flexible transitions on supply and return connections to reduce noise and vibration transmission to the structure.

2. When the connecting return air duct is smaller than the coil inlet opening, construct the transition piece so that the vertical and horizontal dimensions of the transition piece do not increase more then one inch for every seven inches of length of the transition piece.

2. Provide at least three feet of straight duct work preceding the unit inlet.

Duct Insulation and Vapor Proofing: Properly select and install duct insulation as required by the application. All externally insulated duct work must have an adequate vapor seal for summer operation. This is particularly important where the duct is exposed to highly humid conditions in such places as attics, vented crawl spaces, unconditioned basements, and utility rooms. The vapor seal prevents condensation of moisture in the insulating material and subsequent loss of its insulating value.

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Figure 4

CEILING SUSPENSION DETAILS

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INSTALLATION

CAUTION

Direct-expansion coils are shipped pressurized with dry nitrogen. Release pressure from the coil through valves in protective caps before removing caps.

Do not leave piping open to the atmosphere unnecessarily. Water and water vapor are detrimental to the refrigerant system. Until the piping is complete, recap the system and charge with nitrogen at the end of each workday. Clean all piping connections before soldering joints.

Failure to follow these procedures could result in personal injury or equipment damage.

Refrigerant Piping

Refrigerant Coils: Direct-expansion coils have liquid and suction line connections through the front of the cabinet. CAUTION: Use proper care when brazing including use of heat sink (wet cloth or other method) to prevent damage to liquid line and suction line components.

Fig. 5 — Heater Accessory Installed

(right side panel not shown)

Size and install refrigerant lines in accordance with the condensing unit manufacturer’s instructions. Provide insulation on the suction line, to prevent condensation. Provide insulation on the liquid line if unit to be used for heat pump service or if otherwise required.

System Design Regulation

When connecting MVA units in the VRF system (mix or all), keep indoor/outdoor unit

capacity ratio with the range of 50% to 130%. For other conditions, refer to the VRF

System standard piping design regulations.

Electric Heater Accessory

The electric heater may be factory-installed or field-installed. See Figures 5 through 8.

Removal Procedure: To remove the electric heater,

1. Disconnect and lock out electrical power from the unit. Remove heater access panel. Disconnect power wires from the power switch—DANGER! - MAKE SURE there is no voltage on these wires before disconnecting!

2. Disconnect 2 harness connectors at the blower deck.

3. Remove 2 screws holding heater support feet to the blower deck.

4. Remove 4 screws that mount the heater to the heater bulkhead. Handle heater carefully to avoid damaging the wire heating elements. Remove heater from the unit.

Fig. 6 — Heater Accessory Installed

(right side and heater access panels

not shown)

DANGER

WARNING: Hazardous voltage. Only qualified personnel must install the electrical service. Disconnect and Lock Out all incoming power sources before connecting to electrical service.

WARNING: This appliance must be permanently grounded in accordance with the National Electrical Code and local code requirements.

WARNING: For use with copper conductors only.

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INSTALLATION

Install Procedure: To install the electric heater,

1. Disconnect and lock out electrical power from the unit. Remove heater access panel. Disconnect field power wires from the unit power wires.

DANGER! - MAKE SURE there is no voltage supply to the unit before proceeding!

2. Disconnect and discard 1 harness connector at the blower deck.

3. Remove blank plate from heater access panel (covers square hole for breaker style power switches).

4. Remove SAT sensor and sensor holder from heater bulkhead and reposition on unit discharge ductwork routing through auxiliary SAT sensor hole on top panel.

5. Install SAT 3 feet after the first 90 degree turn in the discharge ductwork.

6. Remove plate on the heater bulkhead (4 screws).

7. Install heater by carefully supporting the heater and inserting it into the opening in the heater bulkhead. NOTE: Make sure to guide the pin into the hole at the back of the heater shroud. Secure the heater to the bulkhead with 4 screws.

8. Connect 2 wiring harnesses (male) to the

DANGER

WARNING: Hazardous voltage. Only qualified personnel must install the electrical service. Disconnect and Lock Out all incoming power sources before connecting to electrical service.

matching female receptacles in the blower deck.

9. Connect field wiring to the breaker-style power switches on the front of the heater. WARNING! Be

sure to provide the appropriate wire size and branch circuit protection as required by the unit nameplate!

10. Install the heater access panel.

11. Install the silicone cover “boot” over the top of the power switches. This protects them from dust buildup. The switches may be activated through the flexible boot material.

12. Mark the nameplate label with the matching heater kW rating. Label is located on the exterior of the front top panel.

13. Update EEPROM settings to values shown in

the table. Refer to test run manual for detailed in-

Item Code New Settings

07 0001 38 0002 3C -001

COVER

BOOT

HEATER ACCESS

PANEL

HEATER

ASSEMBLY

POWER

SWITCH(ES)

HEATER SHROUD

Fig. 8 — Heater

Accessory

Installed

HEATER SHROUD

HEATER

BULKHEAD

Fig. 7 — Heater Accessory Removal

(right side and heater access panels

not shown for clarity)

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INSTALLATION-ELECTRICAL

DANGER

WARNING: Hazardous voltage. Only qualified personnel must install the electrical service. Disconnect and Lock Out all incoming power sources before connecting to electrical service.

WARNING: This appliance must be permanently grounded in accordance with the National Electrical Code and local code requirements.

WARNING: For use with copper conductors only.

Typical wiring diagrams are shown on the following pages FOR REFERENCE. Always refer to the wiring diagram on the air handling unit for actual wiring.

NOTE: CHECK MOTOR RATING PLATE FOR CORRECT LINE VOLTAGE.

Connect electrical service to unit. Refer to unit wiring diagram.

CAUTION

Use only copper conductors for field-installed electrical wiring. Unit terminals are not designed to accept other types of conductors.

Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.

Make wiring connections in accordance with the system wiring system diagram and these instructions. Wrong wiring may cause improper operation or unit damage!

Power Wiring

For power supply connection, route field power wiring L1 and L2 and connect either:

1. Unit Without EH: to field-provided and installed disconnect switch and from switch to power entry (unit side) and to unit power leads inside the unit electrical section; or

2. Unit With EH: into the unit through power entry (unit side) and then to the factory installed power switch inside the electrical section (see Figure 9). Note: power switch looks like a circuit breaker but does not provide overload pro- tection. Power switch provided only with electric heater (field kit or factory installed). NOTE: When electric heat greater than 10kW is provided, two power supply circuits are required, as shown on the wiring diagram.

Refer to nameplate or Electrical Ratings (page 30) for FLA, maximum overcurrent protection device (MOPD) and minimum circuit ampacity (MCA). Also refer to wiring diagram affixed to unit to make control and power wiring connections. For new heater installation, mark the nameplate label with the matching heater kW rating. Label is located on the exterior of the front top panel.

Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will accept no responsibility for any damage or malfunction that occurs as a result of such unauthorized changes.

other convenient location. Control voltage wiring leads exit the bottom of the control box and are ready for field-connection. CAUTION! To prevent malfunction of the air conditioner caused by electrical noise, route control wiring and inter-unit control wiring SEPARATELY FROM THE POWER WIRING!

POWER SWITCH

NOTE: Installer is responsible for power wiring and branch circuit over current protection.

Control Voltage Wiring

Control voltage wiring may enter the unit at the control box located behind the blower access door, or

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Unit with Electric Heat

Figure 9

Page 17

INSTALLATION-ELECTRICAL

control wiring

DANGER

General

Provide strain relief where field wiring passes through cabinet. Wiring within the cabinet has been positively located and supported so that it does not pass over sharp metal edges or come in contact with moving parts. After servicing, position wiring properly in the original supports.

All field-installed wiring, including the electrical ground, MUST comply with the National Electrical Code (NEC) as well as applicable local codes. In addition, all field wiring must conform to the Class II temperature limitations described in the NEC.

Refer to factory wiring diagrams installed in the unit. Use the MCA and MOPD from the nameplate or electric heat nameplate or Electrical Ratings (page 30) to size power supply wiring and overcurrent protection device. Installation must comply with NEC and local codes.

For communicating controls, refer to Figures 10 through 13 for max lengths, sizing and intercon-

Building System Wiring Diagram (multiple indoor & outdoor units)

WARNING: Hazardous voltage. Only qualified

personnel must install the electrical service. Disconnect and Lock Out all incoming power sources before connecting to electrical service.

WARNING: This appliance must be permanently grounded in accordance with the National Electrical Code and local code requirements.

WARNING: For use with copper conductors only.

CAUTION

Loose wiring may cause the terminal to overheat or result in unit malfunction or cause a fire hazard. Insure that all wiring is tightly connected!

nections. Refer to the condensing unit operation manual for more details.

Figure 10

NOTE: See table below for wire requirements

for lines above marked “A”, “B”, “C” and “D”.

Control wiring

(A) Inter- unit (be tween

outdoor a nd indoor units)

AWG #18(0.75 mm2) AWG#18 (0.75 mm2)

Max. 3,280 ft. Max. 1,640 ft.

control

AWG #18(0.75 mm2) AWG#18 (0.75 mm2)

Max. 650 ft. (Total) Max. 980 ft.

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(B) Remote control wiring

(D) Inter- outdoor unit

control wiring

Page 18

INSTALLATION-ELECTRICAL

Figure 11

Inter-Unit Control Wiring

Do not install the inter-unit control wiring in a way that forms a loop.

Figure 12

Inter-Unit Control Wiring

Do not install inter-unit control wiring with splices or “star branch” pattern. Star branch wiring causes misaddress setting errors.

Figure 13

Branched Inter-Unit Control Wiring

If branching the inter-unit control wiring, the number of branch points should be 16 or fewer. (Branches less than 3.3 ft. are not included in the total branch number.)

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INSTALLATION-ELECTRICAL (cont’d)

TYPICAL WIRING DIAGRAM—

Unit sizes 18 & 24

TYPICAL WIRING—MVA18, MVA24

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INSTALLATION-ELECTRICAL (cont’d)

TYPICAL WIRING DIAGRAM—

Unit sizes 30, 36, 42, 48 & 60

TYPICAL WIRING—MVA30, MVA36,

MVA42, MVA48, MVA60

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INSTALLATION-ELECTRICAL (cont’d)

TYPICAL WIRING DIAGRAMS—

Electric Heat: 3-6kW and 8-9.5kW

TYPICAL WIRING—ELECTRIC HEAT

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START-UP

Pre-Startup Building Envelope—All building windows and doors should

be installed and closed before starting unit. During summer construction, avoid unit sweating by allowing for gradual pull down: use reduced capacity and use maximum available airflow.

Temperature Controls-Check that unit is connected to the controls system and communicating properly.

Outside Air and Freeze Protection

WARNING: Insure that the property is protected against

freezing conditions Failure to provide freeze protection may result in property damage. Freeze protection

measures are customer-provided and installed and include but are not limited to low-limit thermostats, automatic temperature controls, and outside air dampers.

Startup

1. Insure electrical installation agrees with the unit nameplate (voltage, branch circuit protection, wire size).

2. Close all panels and access doors. Make sure filter media is clean before starting unit. Replace filter if necessary.

3. Verify that discharge ductwork and input plenum are in place and secure.

4. Apply power to unit. If unit is equipped with on-board power switch(es), turn switch(es) to the “On” position.

5. Insure that controls system has power and is operational.

6. Force control system to send fan on signal and speed signal. Refer to unit wiring diagram and electrical section for fan speed control arrangement.

7. Fan should start and run. Make sure fan operates without significant noise or vibration.

8. Allow control system to start condensing unit, or as required for the installation.

9. Complete the checklist on the Start-Up Report.

10. Follow additional startup procedures for the system as required by the condensing unit.

Fig. 14 — Fan Wheel Rotation—

FORWARD CURVED FAN

Fan Airflow Step-Up

If the duct system ESP is higher than planned and increased Air Handler ESP is needed, shift the terminals as shown in Figure 15.

Refer to Airflow tables and curves for airflow performance.

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Stay

Shift all three down

Figure 15

Increasing ESP setting

MVA18

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 969 833 188 1022 804 197 1067 780 206 1132 743 215 1173 711 222 1201 666 224

High 902 774 156 955 749 163 1016 717 173 1067 690 181 1102 656 193 1144 611 201

Medium 898 772 152 960 737 160 1012 711 169 1091 669 176 1132 633 182 1158 569 187

Low 827 711 116 897 670 123 956 641 131 1050 596 137 1090 555 142 1115 473 149

MVA24

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 1236 1052 394 1265 1034 396 1301 996 383 1327 953 345 1351 897 340 1430 838 261

High 1109 959 284 1155 929 296 1198 908 302 1233 882 311 1284 849 319 1304 780 302

Medium 969 833 188 1022 804 197 1067 780 206 1132 743 215 1173 711 222 1201 666 224

Low 902 774 156 955 749 163 1016 717 173 1067 690 181 1102 656 193 1144 611 201

MVA30

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 828 1263 275 851 1221 287 865 1186 286 898 1142 301 922 1105 306 915 1082 309

High 764 1160 219 795 1114 224 819 1076 239 843 1037 241 825 1014 243 874 975 251

Medium 708 1064 171 737 1017 175 758 973 178 794 932 190 785 886 194 856 844 204

Low 630 940 121 663 892 125 693 835 130 730 797 138 750 743 143 806 696 152

MVA36

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 934 1425 406 943 1396 414 966 1358 417 988 1319 426 1005 1279 432 1032 1246 440

High 881 1342 393 900 1311 347 920 1271 356 939 1229 356 967 1195 365 986 1160 370

Medium 764 1160 219 795 1114 224 819 1076 239 843 1037 241 825 1014 243 874 975 251

Low 708 1064 171 737 1017 175 758 973 178 794 932 190 785 886 194 856 844 204

MVA42

Airflow Performance

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 967 1722 525 985 1679 529 1009 1642 541 1029 1597 546 1050 1557 558 1071 1510 567

High 835 1475 332 862 1425 343 890 1388 353 918 1335 365 940 1287 372 970 1238 370

Medium 760 1311 248 784 1271 258 803 1229 263 834 1195 274 870 1151 286 900 1114 290

Low 717 1228 211 742 1184 218 767 1140 225 803 1099 236 840 1046 246 878 994 254

MVA48

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 1057 1894 1040 1080 1872 1031 1093 1816 1020 1104 1764 1010 1109 1685 990 1122 1629 975

High 967 1722 525 985 1679 529 1009 1642 541 1029 1597 546 1050 1557 558 1071 1510 567

Medium 835 1475 332 862 1425 343 890 1388 353 918 1335 365 940 1287 372 970 1238 370

Low 760 1311 248 784 1271 258 803 1229 263 834 1195 274 870 1151 286 900 1114 290

MVA60

Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS

High Top 982 2323 1010 1010 2269 1040 1037 2222 1050 1064 2180 1070 1093 2132 1090 1115 2092 1110

High 878 2082 699 909 2027 711 946 1959 733 979 1932 754 1007 1889 771 1038 1844 791

Medium 760 1793 427 807 1716 450 825 1667 466 873 1623 488 913 1577 506 956 1517 520

Low 689 1603 314 724 1544 326 761 1489 342 805 1425 362 846 1373 380 890 1335 400

NOTES:

1. Data at sea level w/ 1" throw-away filter and dry coil.

As Shipped

0.000 0.100 0.200 0.300 0.400 0.500

Higher Fan Setting

ESP

Areas not recommend for operation due to excess velocity

035-000039-001 Page 23 of 32 MVA IOM 1.3 9-10-2014

Page 24

Airflow Performance Curves

MVA18

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

External Static Pressure ( inch W.G.)

0.00 400 500 600 700 800 900

Airflow (SCFM)

HTH

exessive airflow

Area not re commen ded for use for

MVA30

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

External Static Pressu re ( inch W.G.)

0.00 600 70 0 800 90 0 1000 1100 12 00 1 30 0

Airflow (SCFM)

MVA24

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

External Static Pressure ( inch W.G.)

0.00 600 700 8 00 9 00 100 0 1100

Airflow (SCFM)

HTHML

exessive airflow

Area not rec ommen ded for use for

MVA36

0.50

0.45

0.40

0.35

0.30

0.25

HTHML

0.20

0.15

0.10

0.05

External Static Pressu re ( inch W.G.)

0.00 800 90 0 1000 1 100 1200 1300 14 00 1 500

Airflow (SCFM)

HTHML

MVA42

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

External Static Pressu re ( inch W.G.)

0.00 800 10 00 1200 14 00 1600 1800

Airflow (SCFM)

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

External Static Pressu re ( inch W.G.)

0.00 120 0 1400 160 0 180 0 20 00 220 0 2400

MVA48

0.50

0.45

0.40

0.35

0.30

0.25

HTHML

0.20

0.15

0.10

0.05

External Static Pressu re ( inch W.G.)

0.00 100 0 1200 1400 1600 1800 2000

Airflow (SCFM)

HTHML

MVA60

HTHML

Airflow (SCFM)

035-000039-001 Page 24 of 32 MVA IOM 1.3 9-10-2014

Page 25

DANGER

SERVICE

General

1. Review Safety Considerations at beginning of these instructions. Good safety habits are important tools when performing service procedures.

2. To make speed measurements, use a laser-style tachometer.

Fan Motor Replacement WARNING: Shut off motor power and lock out power

supply.

MOTOR HARNESS & CONNECTORS

Figure 16

MOTOR HARNESS & CONNECTORS

Remove Blower/Motor Assembly Procedure:

1. Disconnect wiring harness plugs from motor (Fig. 16 and 17).

2. Remove blower mounting bolts, which secure the blower rails upward against the blower deck (2ea).

3. Remove motor/wheel assembly from the MVA unit by sliding out (Figure 18).

4. See Figure 19. Loosen shaft set screw (opposite motor side) and motor mount tightening screw until motor can be removed.

5. Remove motor. Install new motor (Fig. 20), tighten motor mount bolt, then locate fan wheel and tighten shaft set screw.

6. Reverse steps 1-4 to reinstall fan. Make sure that the two clips at the back hold the blower rails up against the blower deck.

7. Spin fan by hand to make sure there is no rubbing or interference.

8. Close unit access doors, remove lockout/tag out and restore the unit to operation.

Figure 17

035-000039-001 Page 25 of 32 MVA IOM 1.3 9-10-2014

Page 26

DANGER

Fan System Periodic Maintenance

1. Use of a Preventive Maintenance program is strongly recommended to insure that the unit operates safely and efficiently.

2. Motor bearings are permanently sealed and do not require lubrication.

3. Clean the fan’s flow area - maintenance interval in accordance with the degree of contamination.

4. The fan wheel can be cleaned with a moist cloth.

5. Do not use any aggressive, paint solvent cleaning agents when cleaning.

6. Never use a high-pressure cleaner or water-spray for cleaning - particularly when the fan is running.

MOTOR/ BLOWER SLIDES OUT

Figure 18

Coil Cleaning

DETERGENT — Spray mild detergent solution on coils with garden-type sprayer. Rinse with fresh water. Check to ensure condensate line is free. Excess water from cleaning may flood unit if condensate line is plugged.

Figure 19

Figure 20

035-000039-001 Page 26 of 32 MVA IOM 1.3 9-10-2014

Page 27

SERVICE—Filters

Filters

FILTER SECTIONS — Open or remove filter panel to replace old filter with a new filter. See physical data tables for filter data. See Figure 21.

Figure 21

Figure 22

Access Panels

The 3 sections of the unit can be reached using the front access panels, removable using 5/16” socket or driver or flat head screwdriver. See Figure 22.

035-000039-001 Page 27 of 32 MVA IOM 1.3 9-10-2014

Page 28

SERVICE-Coil Removal and Reinstallation Procedure

1. Perform procedure on the ground for safety. If working at heights USE EXTREME CAUTION observe all FALL SAFETY considerations. Under all conditions, LOCK OUT all power supplies before performing this procedure. WARNING! Coil section can be heavy—use proper lifting equipment.

2. Isolate coil and reclaim refrigerant. Disconnect unit from piping. Remove supply piping to allow access into the coil section from the front.

3. Remove blower access door and coil access doors.

4. Carefully remove temperature sensors from the coil and set them aside, clear of the coil & drain pan assembly. Disconnect electronic expansion valve (EEV) wiring from the EEV.

5. Remove 4 screws on the drain pan side of the cabinet (right side shown in Fig. 23). Remove 4 screws from coil support side of the cabinet (left side shown in Fig. 23).

6. Slide coil & drain pan assembly out of the unit (Fig

19).

7. Coil can be detached from drain pan using 5/16” driver, 2 screws. Coil can be detached from coil support using 5/16” driver, 4 screws.

8. Follow instructions in reverse to install new coil.

9. Re-install sensors back in original positions. CAUTION! Be sure to place sensors in correct locations for proper unit operation.

10. Re-install wiring to EEV.

11. Re-install unit access panels.

12. Return unit to service.

COIL SUPPORT

DRAIN PAN

Figure 23

035-000039-001 Page 28 of 32 MVA IOM 1.3 9-10-2014

Page 29

UNIT ELECTRICAL RATINGS

035-000039-001 Page 29 of 32 MVA IOM 1.3 9-10-2014

Page 30

UNIT DIMENSIONS

MVA18-60 Elec Heat Ready RH Drain Connections—Configuration B

035-000039-001 Page 30 of 32 MVA IOM 1.3 9-10-2014

Page 31

MVA Series Air Handling Unit

Start-up Report

Job Name City

Sales Order # Unit Tag

Model Number Serial Number

Installer Quantity of Units

STARTUP REPORT

Group Checklist Item Yes No

Does electrical service correspond to unit nameplate?

Operational

Electrical/

Structural

Piping Check

-Nameplate Supply Voltage/Phase: Rated_________ Measured___________

-Nameplate Rated FLA motor current: Rated_______ Measured__________ Does all field wiring conform to unit wiring diagram? Is field-provided freeze protection present? (if required) Is fan wheel turning the correct direction?

Is the filter clean? Is unit properly supported? Is unit installed level (necessary for proper condensate drainage)? Is properly sized condensate trap present? Is the condensate disposal system operating correctly? Is auxiliary external condensate drain pan installed or auxiliary drain connection

utilized as recommended by IOM? (not required for valid warranty) CRITICAL! For Horizontal Unit Orientation: Is the EEV in vertical orientation? Is the DX system charged per the condensing unit instructions? Is unit piping correct and insulated to prevent condensation?

Are the refrigerant pipe lines properly insulated? Are there any leaks detected: interior to unit or at connections?

035-000039-001 Page 31 of 32 MVA IOM 1.3 9-10-2014

Page 32

MVA Series Air Handling Unit

Installation, Operation and Maintenance Manual

035-000039-001 Page 32 of 32 MVA IOM 1.3 9-10-2014

Panasonic mva18fbas6hbcp, mva24fbas6hbcp, mva30fbas6hbcp, mva36fbas6hbcp, mva42fbas6hbcp Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual