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14.

200. Maintenance

200.1 Safe Shut Down Procedure

CAUTION: To avoid possible equipment damage or personal injury, assume that there is AC 
voltage present inside the 

VST

 inverter system unit any time AC input power or DC battery 

voltage is applied. The inverter is capable of providing output voltage from the batteries even 
when there is no AC input line voltage. When AC input voltage is present, the unit can provide 
output voltage even when the batteries are disconnected.

Do not touch components inside the unit. DC voltage is always present at the batteries and 
battery cables.

Final Shut Down Procedure

1.

Open the unit’s front access panel.

2.

Place the 

VST

 Battery Switch S2

 in the off 

OFF

 position and then place the 

AC Input circuit

breaker

 at the service panel in the 

OFF

 position.

CAUTION: HAZARDOUS ENERGY IS STORED IN CAPACITORS INSIDE THE 

VST

 UNIT.

AFTER TURNING OFF SWITCHES, ALLOW 5 MINUTES FOR CAPACITORS TO DISCHARGE
BEFORE ATTEMPTING ANY SERVICE PROCEDURES.

3.

If the service technician does not need to access the inside of the unit, keep the unit’s front

 

cover/

door closed.

4.

If the unit will be shut off for an extended period of time, recharge batteries every 60 to 90 days.

CAUTION: The batteries will be damaged and the warranty voided if not routinely re-
charge

d.

NOTE: To turn power back on, follow the “System Start-up Procedure” outlined in Section

108.

Be sure to complete all of the steps to assure the unit will operate properly.

200.2 Routine System Maintenance

The 

VST

 inverter system unit is designed to provide years of trouble-free operation. The unit does re-

quire some routine attention to assure peak performance. The Manufacturer recommends a Preven-
tative Maintenance check be performed by a qualified service technician at least every six months. 
The technician must observe important safety precautions while performing the following recommend-
ed tasks:

• Inspect and clean the unit interiors;
• Inspect all batteries for leaks, case swelling or terminal corrosion;;
• Perform an emergency operation test to check operation of all critical connected loads

200.3 Manual Routine Inverter Tests

NFPA101 requires that Emergency Lighting Equipment be tested on a monthly basis for a period of at 
least 5 seconds, and a minimum of 90 minutes once a year. We strongly recommend these guidelines 
be followed to insure system readiness, and to prolong battery life. The 

VST

 system was designed

with a front panel test switch to facilitate monthly testing. Simply depress the button and hold to test 
the inverter at anytime. Once released, the 

VST

 will revert back to standby operation. For annual 90-

minute discharge or other prolonged tests, simply turn off the AC Input breaker at the service

 

panel.

Summary of Contents for VESTA Mini

Page 1: ...Installation And Operation Instructions For VST Series Mini Inverter Power Systems Models VST 55 125 VST 110 125 VST 110 250 VST 220 250 Surface S Recessed R and Ceiling T Grid T Mounted Versions ...

Page 2: ...be mounted securely in locations and at heights where it will not be read ily subjected to tampering by unauthorized personnel The use of accessory equipment not recommended by the MANUFACTURER may cause an unsafe condition The AC voltage rating of this equipment is specified on the product label Do not connect equipment to any other voltage Do not use this equipment for other than its intended pu...

Page 3: ...ions 8 105 1 AC Wiring Preparations 8 105 2 AC Input and AC Output Connections 8 Wiring Diagram 1 120VAC Connections 9 Wiring Diagram 2 277VAC Connections 10 106 Battery Information 11 106 1 Tools 11 106 2 Battery installation and Connections 11 Wiring Diagram 1 24V Surface and Recessed Mount Models 12 Wiring Diagram 2 24V Ceiling T Grid Mount Models 12 Wiring Diagram 3 48V Surface Mount Models 12...

Page 4: ...es 90 minutes standard Operating temperature 20 C to 30 C 68 F to 86 F Relative humidity 95 non condensing Note Battery performance rated at 25 C 77 F Table 1 System On Line System Number Battery Battery AC Input Current Thermal Model Efficiency Of Voltage Current 120VAC 277VAC Output In BTUs Number Full Load Batteries VDC Amps Max Max On Line Emergency 98 2 24 3 4 1 2 0 52 9 90 98 2 24 5 7 1 2 0 ...

Page 5: ...nd into the air Do not allow smoking sparks or flames in battery stor age location because hydrogen is concentrated under the vent cap of each cell of the battery Hydro gen is highly explosive and is hard to detect because it is colorless odorless and lighter than air 103 Installation Requirements 103 1 Operating Environment Install the VST inverter system in a clean cool dry place with normal ven...

Page 6: ...damage the equipment NOTE Consider unit knockout locations prior to mounting unit Allow room for easy routing of conduit to entry point 104 4 Surface Mount S Models 1 Remove cover and any packing material inside unit housing that may have been used for shipping purposes 2 For ease of installation and to prevent possible damage to the equipment the inverter charger assembly may be temporarily remov...

Page 7: ...achment of unit cover the LED indicator panel assembly position must be adjusted to sit flush against inside surface of cover after attachment This is accomplished using the 2 8 32 hex nuts on the indicator assembly 6 Re install inverter charger assembly if removed in step 2 104 6 Ceiling T Grid Mount T Models 1 Remove cover and any packing material inside unit housing that may have been used for ...

Page 8: ...y Switch S2 is in the OFF position 2 Make sure the VST inverter system input and output voltages are correct for the particular applica tion Remember that the VST system provides single phase power only 3 The input circuit breaker in the input service panel provides the means for disconnecting AC to the VST inverter system Only authorized persons shall be able to disconnect AC to the unit See NEC ...

Page 9: ... externally switched and will illuminate upon loss of utility AC power regardless of external switch position See D in Wiring Diagram 1 for 120V wiring or I in Wiring Diagram 2 for 277V wiring Switched Load Operation Four Circuit 4C Option Functionally identical to the Switched Load Operation above but provides for the operation of up to four individually switched output circuits See E in Wiring D...

Page 10: ...ND SYS SWITCHEDAND UNS WITCHE D LOADS 120V OP E RATION 120 VAC COMMON GROUND SWITCHES LOAD LOAD SW SW CIRCUIT A CIRCUIT B LOAD LOAD SW SW CIRCUIT C CIRCUIT D OFF OUTPUT TO NORMALLY NOTE ONLY 2 OF 4 POSSIBLE SWITCHED CIRCUITS SHOWN LOCAL LIGHTING SWITCHED LIGHTING LOADS CIRCUIT RATED 20A MAXIMUM UNSWITCHED LIGHTING LOADS F G K ...

Page 11: ...L LIGHTING SWITCHED LIGHTING LOADS CIRCUIT RATED 20A MAXIMUM UNSWITCHED LIGHTING LOADS M N Wiring Diagram 3 Dimming Control 120 or 277VAC Connections NOTE Dimming switches S1 and S2 are designed for independent setting to allow different emergency voltages for Output Circuits 1 and 2 if required CAUTION Dimming switches must be programmed such that loads do not exceed unit rating in emergency mode...

Page 12: ...override circuits allow the user to select the power level the connected load will be operated at in emergency mode Each override circuit is controlled by DIP switches which determine the emergency output power level Emergency output can be set for 25 50 75 or 100 of maximum fixture illumination independent of the local dimmer switch position This level of flexibility provides a highly efficient u...

Page 13: ...nected loads regardless of local control device switch position operating status CONNECTIVITY Any or all of the 4C option override circuits may be used to power lighting fixtures or other loads up to the maximum output capacity of the system The outstanding features of the SPS and LPS sy stems provide additional connectivity and flexibility features to the 4C option The system s universal output a...

Page 14: ...void electric shock and burns caused by contacting battery terminals or shorting terminals during battery installation Do not touch uninsulated battery terminals 8 A qualified electrician who is familiar with battery systems and required precautions must install and service the batteries Any battery used with this unit shall comply with the applicable require ments for batteries in the standard fo...

Page 15: ...ring Number DC Voltage of Batteries Part Number Diagram 24 2 03 002 1 24 2 03 001 1 48 4 03 002 3 VST 220 250 S 48 4 03 001 3 24 2 03 002 1 24 2 03 001 1 24 2 03 002 2 24 2 03 001 2 IMPORTANT Observe correct polarity on the battery terminals Polarity markings may vary from battery to battery ...

Page 16: ... voltage configuration 108 System Start Up Procedure IMPORTANT The VST inverter system is a sophisticated electronic backup power supply Care must be taken to follow the steps below in their exact sequence Failure to do so may result in possible equipment failure CAUTION Familiarize yourself with the shut down procedure in Section 200 1 before proceed ing with the Start Up 1 Hold S1 PRECHARGE SWIT...

Page 17: ...f not routinely re charged NOTE To turn power back on follow the System Start up Procedure outlined in Section 108 Be sure to complete all of the steps to assure the unit will operate properly 200 2 Routine System Maintenance The VST inverter system unit is designed to provide years of trouble free operation The unit does re quire some routine attention to assure peak performance The Manufacturer ...

Page 18: ...acements Substituting batteries not supplied by the Manufacturer will void the UL listing of the system and may cause equipment failure To ensure the superior performance of your VST inverter system and to maintain proper charger operation replace spent batteries only with cells having the same part num ber voltage and ampere hour rating as the original batteries 1 Follow the proper shut down proc...

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