Panasonic MVA Series Air Handling Unit Mva18 24 30 36 42 48 60 Fbas6hbcp Installation Operation And Maintenance Manual

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INSTALLATION-ELECTRICAL (cont’d)
TYPICAL WIRING—ELECTRIC HEAT
TYPICAL WIRING DIAGRAMS—
Electric Heat: 3-6kW and 8-9.5kW
TYPICAL WIRING—ELECTRIC HEAT
3 

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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...

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MVA18Areas not recommend for operation due to excess velocity
Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTSHigh Top 969 833 188 1022 804 197 1067 780 206 1132 743 215 1173 711 222 1201 666 224High 902 774 156 955 749 163 1016 717 173 1067 690 181 1102 656 193 1144 611 201Medium 898 772 152 960 737 160 1012 711 169 1091 669 176 1132 633 182 1158 569 187Low 827 711 116 897 670 123 956 641 131 1050 596...

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HTHML
Areanotrecommendedforusefor
exessiveairflow
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
400 500 600 700 800 900Airflow (SCFM)
ExternalStaticPressure(inchW.G.)
MVA18
HTHML
Areanotrecommendedforusefor
exessiveairflow
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
600 700 800 900 1000 1100Airflow (SCFM)
ExternalStaticPressure(inchW.G.)
MVA24
HTHML
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
600 700 800 900 1000 1100 1200...

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SERVICE
General
1. Review Safety Considerations at beginning of
these instructions. Good safety habits are im-
portant tools when performing service proce-
dures.
2. To make speed measurements, use a laser-style
tachometer.
Fan Motor Replacement
WARNING: Shut off motor power and lock out power
supply.
Remove Blower/Motor Assembly
Procedure:
1. Disconnect wiring harness plugs from motor (Fig.
16 and 17).
2. Remove blower mounting bolts, which secure the...

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Fan System Periodic Maintenance
1. Use of a Preventive Maintenance program is
strongly recommended to insure that the unit oper-
ates 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....

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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.
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.
Figure 21
Figure 22 

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1. Perform procedure on the ground for safety. If
working at heights USE EXTREME CAUTION ob-
serve all FALL SAFETY considerations. Under all
conditions, LOCK OUT all power supplies before
performing this procedure. W ARNING! Coil sec-
tion 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...

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UNIT ELECTRICAL RATINGS 

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UNIT DIMENSIONSMVA18-60 Elec Heat Ready
RH Drain Connections—Configuration B