NRG Systems 11708 Manuale utente

All-Weather PVH Kit

NRG SRA System | Kits #11708, 11709, 11710

Authors:

Technical Services

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 2

18 April 2018

TABLE OF CONTENTS

INTRODUCTION ..................................................................................................................... 4

MATERIALS & TOOLS ............................................................................................................. 5

In the Kits ..................................................................................................................... 5

Required Tools.............................................................................................................. 5

Recommended Additional Documentation .................................................................... 5

Precautions................................................................................................................... 6

SECTION 1: ASSEMBLING THE ALL-WEATHER SYSTEM TOWER ................................................ 6

1.1 Construct and Erect the 2.2m Tower ........................................................................ 6

SECTION 2: ASSEMBLING THE PV PANELS & BRACKETS........................................................... 7

2.1 Open and unpack all items. ..................................................................................... 7

2.2 Construct the PV Frame ........................................................................................... 7

2.3 Attach Ventilator Control System (Shelter Box) to Tower. ...................................... 15

2.4 Mount 110S Temperature Sensor .......................................................................... 16

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 3

18 April 2018

2.5 Chain the Deep-Cycle Batteries Together ............................................................... 16

SECTION 3: INSTALLATION OF THE VU01 TO THE SRA TOWER............................................... 17

3.1 Install the SR20 Pyranometer into the VU01 ventilator unit ................................... 17

3.2 Connecting the VU01 & Pyranometer to the SRA Tower & SymphoniePRO............. 19

SECTION 4: WIRING THE ALL-WEATHER SYSTEM .................................................................. 20

4.1 Wiring the Ventilator to the Control System .......................................................... 20

4.2 Wiring the NRG 110S Temperature Sensor to the Control System........................... 22

4.3 Wiring Status Signals from the Control System to the Data Logger ......................... 23

4.4 Wiring the Batteries to the Control System ............................................................ 24

4.5 Wiring the PV Panels to the Control System........................................................... 25

SECTION 5: LOGGER CONFIGURATION FOR STATUS SIGNALS................................................ 26

5.1 Heater Status ........................................................................................................ 26

5.2 Fan Status ............................................................................................................. 26

5.3 Battery Bank Voltage Monitoring........................................................................... 27

5.4 Logger Configuration Summary Table .................................................................... 27

SECTION 6: CONFIGURING THE PLC ...................................................................................... 28

6.1 Set the PLC Date and Time..................................................................................... 28

6.2 Start the PLC Program............................................................................................ 28

6.3 Understanding the NRG Default Control Algorithm (PLC) ....................................... 29

6.4 How to Configure the Controller for Kit 11708 ....................................................... 29

6.5 How to Configure the Controller for Kits 11709 and 11710 ..................................... 30

6.6 Advanced User Settings –PLC Control Algorithm ................................................... 30

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 4

18 April 2018

INTRODUCTION

The NRG SRA’s All-Weather PVH Kit adds the capability of the Hukseflux VU01 Ventilation unit to your

SRA system. When used in conjunction with a Hukseflux SR20 pyranometer, the VU01 will increase the

reliability, dependability, and accuracy of the sensor in all conditions.

Ventilation prevents the formation of dew and frost on pyranometers. During warmer months, the

ventilation fan helps eliminate dew, while in colder months the heater promotes evaporation of water

droplets and sublimation of snow and ice.

To accommodate the power requirements of the VU01, the PVH Kit uses a second 2.2m tower, frame-

mounted PV panels, a deep-cycle battery bank, and charge controller. The system is controlled by a

preprogrammed PLC which switches the fan and heater on and off. The system status is monitored by

our SymphoniePRO data logger.

NRG Systems has created three PVH Kit options, depending on the climate of your site. Make sure that

you have the proper number of panels and batteries for your intended application.

Kit 11708: (1) 60W PV panel; (1) deep-cycle battery. Optimized for sites that experience dust

and dew accumulation.

Kit 11709: (2) 60W PV panels; (2) deep-cycle batteries. Optimized for sites that experience minor

snow accumulation.

Kit 11710: (3) 60W PV panels; (3) deep-cycle batteries. Optimized for sites that experience snow

& ice buildup.

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 5

18 April 2018

MATERIALS & TOOLS

In the Kits

NRG SRA Tower Assembly, 2.2m (NRG #9118)

Hukseflux VU01 Pyranometer Ventilator

1 to 3 PV panel(s), 60W each

Panel frame, angle-adjustable

1 to 3 Deep cycle batteries (108 Amp hours each), battery boxes

Shelter box, charge controller, PLC with pre-loaded program, terminal block

NRG 110S temperature sensor

Assorted cabling

Required Tools

NRG SRA Tower tools (see SRA System manual)

3/16” hex key

5/32” hex key

7/16” combination wrench

3/4” combination wrench

5/16” nut driver or Cordless drill/impact driver with 5/16” nut driver bit

Small flathead screwdriver

Diagonal cutters

Tape measure

6ft stepladder

Wire crimpers

5lb Sledgehammer or similar-sized hammer

Slope angle meter (included with tower)

Compass or GPS

Electrical tape

Documentation equipment (Camera, pen, & paper)

Gloves

Fold-up table or workbench –6’ x 2.5’ or larger recommended

Digital Voltmeter (optional)

Wire strippers (optional)

Recommended Additional Documentation

NRG SRA System manual

Hukseflux VU01 Ventilator manual

NRG SymphoniePRO manual

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 6

18 April 2018

Precautions

Assembling the SRA’s All-Weather PVH Kit requires working around electrical systems and

batteries. Please use caution when working on electrified systems. De-energize the system by

disconnecting PV panels and batteries before servicing the system in any way.

The SRA’s All-Weather PVH Kit, once assembled, is large and heavy. Two people are required

for assembly and mounting to the tower.

During assembly of the SRA’s All-Weather PVH Kit, do not connect PV panels until the system

is ready to be put into service.

Kit #11709 & #11710 contain multiple 12V deep-cycle batteries that must be connected

together into a battery bank. Check the orientation of the batteries and polarity of the

terminal posts before attempting to chain the batteries together! Serious injury could result

from an improper connection.

Notes

-Slide nuts used in this kit have one side with a lip around the threaded hole. When inserting a slide nut

into an extruded aluminum rail, the lip should always face the center of the rail, not outward towards

the bolt. Failure to do so can prevent the nut from sliding easily inside the channels of the rail.

-Do not overtighten bolts. Overtightening bolts may result in damage to hardware.

-Loctite 242 has been provided in all hardware kits. NRG recommends that Loctite be applied to all slide

nut threads to help prevent loosening over time. Pre-assembled components have Loctite applied

already.

SECTION 1: ASSEMBLING THE ALL-WEATHER SYSTEM TOWER

1.1 Construct and Erect the 2.2m Tower

The SRA’s All-Weather PVH Kit includes a 2.2m NRG SRA tower assembly (kit #9118). Construction of this

tower is recommended prior to assembling the PV brackets. Choose a suitable location for the tower

that is close enough for sensor wires (5m length) to reach your NRG SRA System and data logger.

Orient the guy ring and wires so that the PV frame will fit in between two guy wires.

Please read the SRA manual for instructions about how to safely erect the tower. To download the

manual from our website, follow the link below:

https://www.nrgsystems.com/assets/resources/SRA-Manual2.pdf

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 7

18 April 2018

SECTION 2: ASSEMBLING THE PV PANELS & BRACKETS

2.1 Open and unpack all items.

Your All-Weather PVH kit comes packaged in several boxes. Verify that all contents are present and

undamaged.

2.2 Construct the PV Frame

2.2.1 Attach the longest frame pieces (extruded aluminum, 65” length) to the PV panels.

Place PV panels on work surface face-down. Place multiple panels together with the long sides touching

each other. Be careful not to scratch glass surface.

Thread four 1/4-20x.375 hex bolts (#11052) through the PV panel holes indicated (Figure 2-1) and attach

1/4”flat washers and slide nuts (Figure 2-2).

Figure 2-1: PV panel with bolt holes indicated. Figure 2-2: Bolt/washer/nut alignment in PV panel frame.

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 8

18 April 2018

Attach aluminum frame pieces to the panel frames through the slide nuts. Push the bolt head up against

the panel frame to create a gap between washer and slide nut (Figure 2-3). Make sure that the washer

remains between the extruded aluminum and panel (Figure 2-4).

Figure 2-3: Create space for aluminum rail. Figure 2-4: Slide rail onto the slide nuts.

Determine which PV panel will be at the top, then make sure it is flush with the ends of the rails. If more

than one panel is included with your kit, leave a small (about 1/8”) gap between panels on the rails.

2.2.3 Assemble the top tower mount.

Use the diagonal cutters to cut the zip tie packaging holding together all aluminum rails. Remove the

hinged assembly with 12” and 25” rail sections. Remove the V-block/U-bolt assembly from the hardware

box (Figure 2-5, following page).

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 9

18 April 2018

Figure 2-5: Assembled hinges on shorter aluminum rails.

Remove slide nuts from the 1/4-20x1.25 bolts on the V-block, then add Loctite to the threads and

reattach. Slide the V-block assembly onto the 12” rail in the channel opposite of the hinge (Figure 2-6).

Center the block onto the rail and tighten bolts to secure.

Figure 2-6: Slide V-block onto the 12” rail, then center.

NRG Instructions

SRA System | All-Weather PVH Kit

SRA_All-Weather_PVH_Kit_Instructions

Rev. 5.0

support@nrgsystems.com | Page 10

18 April 2018

2.2.4 Attach frame crosspiece and top tower mount to the main assembly.

Thread 1/4-20x.375 bolts (#11697) through small corner brackets and into slide nuts (Figure 2-7).

Figure 2-7: Corner brackets for use with aluminum rails; slide nuts and bolts are attached.

Slide corner brackets onto the ends of the 25” aluminum crosspieces (Figure 2-8). Orient the corner

brackets so that the round hole is touching the crosspieces (the oval holes will attach to the long, PV-

mounted rails). Do not tighten yet.

Figure 2-8: Corner brackets attached to crosspiece. Note the orientation of the hinge.

Slide the crosspieces onto the 65” rails of the main assembly. The top tower mount goes behind the top

PV panel, about 1” from the end. The single 25” crosspiece goes about 24” from the bottom of the

vertical rails. There should be about 1/2” of space at each end of the crosspieces. Tighten all corner

bracket hardware (Figure 2-9, Figure 2-10, following page).

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