hotspot energy DC4812VRF User manual

DC4812VRF
Installation Guide
Version 1.4
Copyright 2013 HotSpot Energy 1

Notice To Owner/Installer
This unit is designed for installation by an experienced person. It is legal for a homeowner
to install it, however we highly recommend using a licensed HVAC technician for
installation. There is high-voltage DC power used inside and outside of the unit.
There are capacitors inside the unit that may contain dangerous levels of power
even after the unit has been disconnected from its power source. The power must be
disconnected and all of the capacitors must be discharged before servicing the system.
Legal Information About Self-Installing R-410AAir Conditioners
Can a homeowner install this system?
Yes, a homeowner with a vacuum pump, proper training, and equipment can install this
unit. Unless you are experienced with installing air conditioners we recommend you hire a
professional installer. The person who installs the system must do all work in compliance
with local building and electrical codes.
Are there any restrictions on the purchase of R410A refrigerants?
R-410Ais not an ozone-depleting substance.At this time the purchase of R-410A
refrigerant is not restricted in the US. There is no technician certification requirement for
those that purchase HFC refrigerants, such as R-410a or R-134a. If you are not licensed,
some local HVAC supply companies may refuse to sell you R410Abased on a
misunderstanding of the law, or because they wish to discourage homeowners from
working on their own systems.
Are there any restrictions on the use of R410A refrigerants?
Yes, it is illegal to knowingly vent or release these refrigerants. The venting prohibition
applies to R410A, and all other HFC refrigerants, just as it does for ozone-depleting
refrigerants like R-22.
Is EPA technician certification required to service R410A systems?
No, at this time EPA technician certification is not required in order to service R-410a
systems.
Source: http://www.epa.gov/ozone/title6/phaseout/technicians_contractors_faq.html
HotSpot recommends that only a licensed air conditioning
contractor be allowed to install or service this unit.
Copyright 2013 HotSpot Energy 2

WARNING!
This unit uses high voltage DC power. There are multiple capacitors
within the unit that may contain dangerous power, even after the
power supply has been disconnected.
Capacitors MUST BE DISCHARGED before servicing any electrical
components of this unit!
Refer any installation or service to a qualified professional. HVAC
professionals can contact HotSpot for downloadable service
manual.
Copyright 2013 HotSpot Energy 3

Copyright 2013 HotSpot Energy
DC4812VRF DC Air Conditioner Installation Guide
Table of Contents
4
Cover Page
1
Notice To
Owner/Installer
2
Capacitor
Warning
3
Table of Contents
4
Safety Precautions
5
Selecting Installation Location
6
Indoor
Unit Installation
7
Connecting Power Cables
10
Outdoor
Unit Installation
13
Recharging Empty Unit
17
Outdoor
Electrical
19
Battery Plant
22
Solar Installation
23
Charge Controller
25
Cabling,
Mounting, Grounding
27
Generator
Tie-In
28

Copyright 2013 HotSpot Energy
SAFETY PRECAUTIONS
Please read this installation manual completely before installing the product. If the power cable is damaged, replacement
work shall be performed by authorized personnel only. Installation must be performed in accordance with the NEC and CEC by
authorized personnel only. All the pictures in the instructions are for explanation purposes only. The actual shape may vary.
Contact an authorized service technician for repair, maintenance or installation of this unit. This appliance is not intended for
use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their
safety. Children should be supervised to ensure that they do not play with the appliance. The design and specifications are
subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details.
WARNING
Strictly adhere to the instructions in this manual. If the installation manual is not followed, it may cause water leakage,
electrical shock, fire, death. Use the attached accessories parts and specified parts for the installation, otherwise, it will
cause the unit to fail, water leakage, electrical shock, and possibly fire. Install at a suitable and firm location which is able
to withstand the units weight. If the unit is mounted on an approved bracket, unit may drop and cause injury. For
electrical work, follow all local and national wiring codes and these installation instructions. Use the proper size and type
of cable and connect it tightly, clamp the cable so that no external force will be present on the terminal. If the connection
or fitting is not tight, it may heat-up or could cause a fire at the connection. Wire routing must be properly arranged so
that control board cover is properly fitted. If control board cover is not fitted perfectly, it may cause the connection to
heat up and could cause a fire or electrical shock. When installing the line set, take care not to let moisture or foreign
substances other than the specified refrigerant go into refrigeration cycle. Otherwise, it will cause lower capacity,
abnormal high pressure in the refrigeration cycle, possible explosion and injury.
This equipment must be grounded and installed according to the NEC. It may cause electrical shock or damage to the
system if not grounded properly.
Do not install the unit in a location where leakage of flammable gas may occur. If flammable gas leaks and
accumulates near the unit, it may cause a fire or explosion.
This unit produces condensate. Install the drain piping as mentioned in the installation instructions. If drainage is not
correct, water may enter the room and cause damage.
This unit uses high voltage DC power. There are multiple capacitors within the unit that may contain dangerous
power, even after the power supply has been disconnected.
Refer any service to a qualified professional. See the DC4812VRF SERVICE MANUAL for service information.
Capacitors MUST BE DISCHARGED before servicing any electrical components of this system!
Batteries: Make sure to follow the NEC and instructions provided by the battery manufacturer when wiring,
connecting, and grounding the battery plant.
Charge Controllers: Make sure to follow the NEC and instructions provided by the manufacturer.
Solar Array: Follow the NEC and manufacturers instructions for mounting, connecting, and grounding solar power
components.
5

Copyright 2013 HotSpot Energy
SELECT THE BEST LOCATION
Indoor unit
There should not be any heat source or steam near the
unit. There should not be any obstacles blocking the air
circulation. Choose a location where air flow is good.
Choose a location where condensate drainage can be
easily done and where noise prevention is taken into
consideration. Do not install the unit near the en trance
or exit of the room. Ensure the clearances indicated by
arrows, from the wall, ceiling, fence or other obstacles.
See figure 1. There should not be any direct sunlight on
the indoor unit. If unavoidable, sunlight prevention
should be taken into consideration.
Outdoor unit
If an awning is built over the unit to prevent direct
sunlight or rain, be careful that heat radiation from the
condenser is not obstructed. There should not be any
animals or plants near the unit which could be affected
by hot air discharged. Ensure the clearances indicated
by arrows, from the wall, ceiling, fence or other
obstacles. See figure 2
Do not place any obstacles on the unit that may
interfere with the discharged air flow.
Placement of the
outdoor unit
Anchor the outdoor unit with a bolt and nut 10 or 8
tightly and horizontally on a concrete or rigid mount.
NOTE: Install the outdoor unit according to the
dimension as indicated below:
Outdoor Unit Dimensions (760 x 590 x 285) mm
Figure 2
1
Installation Plate
1
2
Clip Anchor
5
-8
Depending
on the model
3
Self
-tapping Screw AST 3.9 x 25
5
-8
Depending
on the model
4
Seal
1
5
Drain Joint(For cooling & heating models
only
）
1
6
Line Set
Liquid
side
6.35 mm
1/4
“
Parts you must
purchase
.
Gas Side
9.52 mm
1/2
“
Parts you must
purchase.
7
Control
Cable
Refer to page 11 for
control
cable details
Parts you must
purchase.
8
Remote controller
1
9
Self
-tapping Screw B ST2.9x10
2
Optional Parts
1
0
Remote controller holder
1
Optional Parts
6

Copyright 2013 HotSpot Energy
FITTING THE INSTALLATION PLATE
NOTE:
Fitting The Installation Plate
Ensure that the mounting wall is strong and solid
enough to prevent vibration.
1. Fit the installation plate horizontally on structural
parts of the wall with spaces around the installation
plate. See figure 3
2. If the wall is made of brick, concrete or the like, drill
eight (8) 5mm diameter holes in the wall and insert
anchor clips for appropriate mounting screws.
3. Fit the installation plate on the wall with eight (8)
type A screws.
Fit the Installation Plate and drill holes in the wall
according to the wall structure and corresponding
mounting points on the installation plate. The
installation plate is provided with the machine.
(Dimensions are in mm unless otherwise stated)
For correct orientation of Installation plate see
figure 4.
DRILL A HOLE IN THE WALL
1. Determine left and right side hole positions according
to the installation plate. The hole center is obtained by
measuring the distance as shown in the diagram figure
2. Drill the piping plate hole with 65mm hole saw drill
bit.
3. Drill the piping hole at either the right or the left
side. The hole should be slightly slanted to the outdoor
side for condensate water drainage.
See figure 5
4 Always use conduit when drilling through metal grid,
metal plate or the like.
Figure 3
Figure 4
Figure 5
7

Copyright 2013 HotSpot Energy
CONNECTIVE PIPE AND DRAINAGE
INSTALLATION
DRAINAGE
1. Run the drain hose sloping downward. Do not
install the drain hose as illustrated in figure 6
2. When connecting the extension drain hose,
seal the connecting part of extension drain hose
with water proof tape, do not let the drain hose
slack.
Connect the indoor unit first, then the outdoor
unit.
CONNECTIVE PIPE INSTALLATION
1. For the left- hand and right-hand piping,
remove the pipe cover from the side panel.
2. For the rear-right-hand and rear-left –hand
piping, install the piping as shown in figure 7.
3. Bundle the tubing, connecting cable, and drain
hose securely with tape, evenly, as shown in
figure 8, on the right. Because the condensed
water from rear of the indoor unit is gathered in a
reservoir and is piped out of room, do not put
anything else in the reservoir.
CAUTION
Connect the indoor unit first, then the outdoor
unit. Do not allow the piping to hang out from the
back of the indoor unit.
Be careful not to let the drain hose slack. Use
insulation such as Armaflex to insulate the line
set. Be sure that the drain hose is located at the
lowest side of the bundle. See figure 8.
If drain hose is located at the upper side it can
cause drain tray to overflow inside the unit.
Never intercross or wind the power wire with any
other wiring. Run the drain hose sloped
downward to drain out the condensed water
smoothly.
Figure 6
Figure 7
Figure 8
8

Copyright 2013 HotSpot Energy
INDOOR UNIT INSTALLATION
1. Pass the piping through the hole in the wall. See
figure 9.
2. Hook the indoor unit onto the upper portion of
installation plate (Engage the indoor unit with the upper
edge of the installation plate). Ensure the hooks are
properly seated on the installation plate by moving it in
left and right motions.
3. Piping can be made by easy by supporting the indoor
unit with a cushioning material between the indoor unit
and the wall. Remove it after finishing the piping. See
figure 10
4. Press the lower left and right side of the unit against
the installation plate until hooks engages with their
slots.
Figure 9
Figure 10
9

Copyright 2013 HotSpot Energy
CONNECTING POWER CABLES
ELECTRICAL WORK
MAKE SURE TO USE SHIELDED WIRE FOR WIRING THE COMMUNICATIONS CABLE BETWEEN INDOOR
AND OUTDOOR UNIT
The following is a general guide. FOLLOW NEC FOR ALL WIRING.
1. If there is a safety problem with installing the 48 VDC AC unit, the technician should refuse to
install the air conditioner and explain to the customer that the problem must be resolved before
continuing the installation.
2. Power voltage should be in the range of 46v to 58v DC.
3. Ensure the air conditioner, panels, charging system, and batteries are properly grounded.
4. All components shall be installed in accordance with National Electrical Code.
5. Do not install the air conditioner in a wet room such as a bath room or laundry room.
6. A disconnection capability must exist on or between the charge controller and battery bank. A DC
rated disconnect should be used between the battery bank and the AC unit in accordance with the
NEC.
7. Keep the unit at least 36” away from combustible materials.
8. Refer to the Electrical Connection Diagram located on the panel of the indoor & outdoor unit to
connect the wires. All wiring must comply with local and national electrical codes and be installed by
a qualified electrician.
MINIMUM WIRE SIZE (AWG: American Wire Gauge)
You can use a voltage drop calculator to determine the minimum AWG based on the voltage , amps,
and distance. There is a wire size/voltage drop calculator at http://www.calculator.net/voltage-drop-
calculator.html
Allowable Voltage Drop (%): The percentage of voltage drop acceptable. This is typically allowed to
be 5% or lower in ELV systems. HotSpot recommends <3% voltage drop.
Rated Current : Per AS4509.2 as "The maximum 30 minute average of apparent power or DC power
consumption (measured in volt-amperes for AC and watts for DC)". We calculate based on the
maximum current that the cable is to carry.
ELV System Voltage: The nominal system voltage is 48 volts for the HotSpot DC4812VRF DC air
conditioner. The nominal system voltage for the PV/charge controller configuration will depend on the
string sizing. HotSpot assumes PV string voltage of 100v for its AWG recommendations.
FOLLOW THE NEC AND USE THE GUIDE ON PAGE 11 FOR PROPER AWG SIZING.
10

Copyright 2013 HotSpot Energy 11
Connect 48v DC power from batteries to terminals as shown below. “E” refers to Earth
Ground.
Connect outdoor unit (ODU) (below, left) to indoor unit (IDU) (below, right) as shown below:
AWG Wire Gauge Sizing Guide
For DC4812VRF Air Conditioner
DC4812VRF Air Conditioner Minimum Wire Gauge Sizing Chart for Connecting
Outdoor Power
Distance
10 ft. 20 ft. 30 ft. 40 ft. 50 ft. 75 ft. 100 ft.
HotSpot Recommended AWG
AWG AWG AWG AWG AWG AWG AWG
Solar PV to Charge Controller
12 12 12 12 12 10 10
Charge Controller to Batteries
12 10 NA NA NA NA NA
Batteries to
ODU 10 10 10 10 8 7 6

Copyright 2013 HotSpot Energy
Connecting To The Indoor Unit
NOTE:
Before performing any electrical work, turn off the main power to the system AND MAKE SURE ALL
CAPACITORS ARE DISCHARGED.
1. The (5) five inside connecting cables can be connected without removing the front grille.
2. The 5 connecting power cable s must be sized correctly, see page 11.
3. Lift the indoor unit panel up, remove the electrical box cover by loosening the screw.
4. Ensure the color code of the indoor unit wire terminals match the outdoor unit terminal numbers and the
wiring diagram.
5. Wrap any cables not connected with terminals with insulation tape so that they will not touch any
electrical components. Secure the cable onto the control board with the cable clamp.
Figure 12
Figure 11
If using an installation bracket, the installation bracket should be installed according to the installation
bracket diagram. The installation wall should be solid brick, concrete or similar level of construction, or
actions to reinforce the supporting bracket should be taken. The connection between the bracket and wall,
and the bracket and the air conditioner should be firm, stable and reliable. Be sure there are no obstacles
which can block the flow of air.
Figure 13
12
OUTDOOR INSTALLATION PRECAUTION
Install the outdoor unit on a rigid base to prevent excess noise and
vibration.
Determine the air inlet and outlet direction, be sure that the flow of
air is not blocked.
In the case that the installation site is exposed to strong winds such as
the ocean front, make sure the fan can operate properly by putting
the unit lengthwise along the wall or using a dust or wind shield. See
figure 13.

Copyright 2013 HotSpot Energy
DRAIN JOINT INSTALLATION
NOTE: The drain joint may differ slightly from the
diagram. For the drain joint with the seal, Fig. A,
first fit the seal onto the drain joint, then, insert the
drain joint into the base pan hole of outdoor unit.
Rotate it 90 degrees to secure it in place.
To install drain joint as shown in Fig. B, insert the
drain joint into the base pan hole of outdoor unit
until it remains fixed with a clicking sound. Connect
the drain joint with an extension drain hose (Locally
purchased), in case of water draining off the
outdoor unit during the heating or cooling mode.
REFRIGERANT PIPE CONNECTION
Flaring
1. Cut a pipe with a pipe cutter.
2.Remove flare nuts attached to the indoor and
out door units. Slide them over the end of the
pipes after removing burs from the pipes, and
flare the pipe.
3.Firmly hold copper pipe in a die in the
dimensions shown in the table below.
Tightening connection
Align pipes to be connected. Sufficiently tighten
the flare nut with fingers, and then tighten it
with a torque wrench as shown. Be careful -
excessive torque can break or damage the nut.
Use proper torque to ensure a good seal.
Do not over-tighten.
13
Outer
diam.
A(mm)
Max.
Min.
6.35
mm
or 1/4 “
1.3 0.7
12.7
mm
or 1/2 “
1.8 1.0
Outer diam. Tightening
torque(N.cm) Additional tightening torque(N.cm)
6.35mm or 1/4” 1500(153kgf.cm) 1600(163kgf.cm)
12.7mm or 1/2”
3500(357kgf.cm 3600(367kgf.cm)

Copyright 2013 HotSpot Energy
CONNECT THE CABLE TO THE OUTDOOR UNIT
1. Remove the electrical control board cover from the outdoor unit by loosening the screw. See figure 17.
2. Connect the connective cables to the terminals as identified with their respective matched numbers on
the terminal block of indoor and outdoor units. See figure 18.
3. Secure the cable onto the control board with the plastic cable clamp.
4. To prevent the ingress of water, form a loop of the connective cable as illustrated in the installation
diagram of indoor and outdoor units.
5. Insulate unused cords (conductors) with PVC-tape so they do not touch any electrical or metal parts.
Figure 17
Figure 18
AIR PURGING AND TEST OPERATION
Note: Line set pipe length will affect the capacity and energy efficiency of the unit. The nominal efficiency is
tested basing on the pipe length of 7.5 meters.
Air purging
Air and moisture in the refrigerant system have undesirable effects and can damage the system. Therefore,
the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to
remove any non-condensables and moisture from the system.
Check that each tube (both liquid and gas side tubes) between the indoor and outdoor units have been
properly connected and all wiring for the test run has been completed. Make sure to properly evacuate the
system using a vacuum pump.
Pipe length and refrigerant amount:
Figure 19
14
Connective pipe
length Air purging
method
Additional amount of refrigerant to be charged
Less than 7.5m
Use vacuum pump
-------------
More than 7.5m
Use vacuum pump
Liquid side:6.35mm R410A:
(Pipe length-7.5)x20g/m Liquid side:|9.52mm: R410A: (Pipe length-7.5)x40g/m
Outdoor unit connects to 48v DC Power only.
Use cable AWG sized per distance calculations (see page 11.)
48v DC ONLY
DO NOT CONNECT
AC POWER
TO THIS SYSTEM

Copyright 2013 HotSpot Energy
Using the Vacuum Pump
FOLLOW THE INSTRUCTIONS INCLUDED WITH THE VACUUM PUMP. MAKE SURE YOU HAVE PROPER
R410A FITTINGS
1.Completely tighten the flare nuts, A, B, C, D,
connect the manifold valve charge hose to a
charge port of the packed valve on the gas pipe
side.
2.Connect the charge hose to the vacuum pump.
3. Fully open the Lo handle of the manifold valve.
4.Operate the vacuum pump to evacuate. After
starting evacuation, slightly loose the flare nut of
the packed valve on the gas pipe side and check
that the air is entering. (Operation noise of the
vacuum pump changes and a compound meter
indicates 0 instead of minus)
5. After the evacuation is complete, fully close
the Lo handle of the manifold valve and stop the
operation of the vacuum pump. Make evacuation
for 15 minutes or more and check that the
compound meter indicates -76cmHg(-1.0x10 Pa).
See figure 21
6. Turn the stem of the packed valve B about 45
counterclockwise for 6~7 seconds after noticing
gas coming out, then tighten the flare nut again.
Make sure the pressure display in the pressure
indicator is a little higher than the atmosphere
pressure.
7. Remove the charge hose from the Low
pressure charge hose.
8. Fully open the packed valve stems B and A.
9. Securely tighten the cap of the packed valve.
15

Copyright 2013 HotSpot Energy
Safety and leakage check
Performed after charging the unit
1.Soap and water method:
Apply a soapy water or a liquid neutral detergent on the
indoor unit connections and outdoor unit connections
with a soft brush. If bubbles come out, it indicates a
leak.
Caution
A: Lo packed valve
B: Hi packed valve
C and D are at the ends of the indoor unit connection.
Running Test
Perform test operation after completing gas leak check
at the flare nut connections, and perform electrical
safety check.
Check that all tubing and wiring have been properly
connected.
Check that the gas and liquid side service valves are
fully open.
1. Connect the power, press the ON/OFF
button on the remote controller to turn the
unit on.
2. Use the MODE button to select COOL, HEAT,
AUTO and FAN to check if all the functions
work well.
3. When the ambient temperature is too
low(lower than 17 C), the unit cannot be
controlled by the remote controller to run at
cooling mode, manual operation can be used
Manual operation is used only when the
remote controller is disable or maintenance
necessary.
Hold the panel sides and lift the panel up to an
angle until it remains fixed with a clicking
sound.
Press the Manual control button to select the
AUTO or COOL, the unit will operate under
Forced AUTO or COOL mode (see User Manual
for details).
4. The test operation should last about 30
minutes.
16

Copyright 2013 HotSpot Energy 17
Recharging the DC4812VRF
All DC4812VRF units are shipped from the factory fully charged for a lineset length up to 25 ft. However,
if the unit was shipped via air freight, due to air safety regulations the R410a will have been removed and
replaced with a low pressure nitrogen charge. If you need to recharge an uncharged unit for this or other
reason, the following instructions are provided.
Evacuation
Air and moisture in the refrigerant system have undesirable effects as indicated below:
- Damage to compressor and valves
- Pressure in the system rises.
- Operating current rises.
- Cooling or heating efficiency drops.
- Moisture in the refrigerant circuit may freeze and block capillary tubing.
- Water may lead to corrosion of parts in the refrigeration system.
The indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to
remove any non-condensables and moisture from the system before charging with R410A Freon.
Evacuation with vacuum pump
- Preparation
Check that each tube (both liquid and gas side tubes) between the indoor and outdoor units have been
properly connected and all wiring for the unit has been completed. Remove the service valve caps from
both the gas and the liquid side on the outdoor unit. Note that both the liquid and the gas side service
valves on the outdoor unit are kept closed at this stage.
Completely tighten the flare nuts, A, B, C, D. Figure 59
1. Using a R410A 1/4"M x 5/16"F Swivel Adapter, connect the manifold valve charge hose, (blue
hose) to the charge port of the low-pressure valve on the gas pipe side.
Use caution when handling the packed valve!
2. Open the valve stem until it hits against the stopper. Do not try to open it further. Replace and
securely tighten the valve stem cap with a wrench. Figure 60

Copyright 2013 HotSpot Energy 18
Recharging (cont’d)
3. Connect the yellow hose connection to the
vacuum pump, red hose is not used.
4. Fully open the Blue valve of the manifold valve.
5. Operate the vacuum pump to evacuate. Check the
gauge for proper vacuum.
6. Run evacuation for 30 minutes or more and check
that the vacuum meter indicates -76cmHg (-
1x105Pa).
After the evacuation is complete, fully close the
LOW valve of the manifold valve and stop the
operation of the vacuum pump. Disconnect the
yellow hose from the vacuum pump and connect
it to the charging tank. Figure 62
7. Open the charging tank valve and place it on a
digital scale inverted. Purge the manifold with gas,
reset the digital scale and weigh in 1600g of
Freon.
If filling slows down, turn unit on and set to high
cool to complete the charging. Disconnect the
blue hose and replace the service caps

Copyright 2013 HotSpot Energy 19
DC4812VRF Typical System Topology
Outdoor Electrical Connections
Charge Controller: Warning: Charge controllers have a maximum Voltage
HotSpot recommends and may have provided a charge controller from Morningstar: Tristar TS-45, Tristar
TS-MPPT-45 or TS-MPPT-60. Information on using, installing and/or configuring these units is available for
download from www.morningstarcorp.com Regardless of the brand charge controller used, please
follow the charge controller manufacturers recommended procedures. Always use a string sizer to
properly configure the PV panel wiring to supply the proper voltage. Failure to do so could cause
electrical shock, damaged equipment, and void the warranty.
http://www.morningstarcorp.com/string-calculator/
The instructions in this document are only guidelines, consult the manufacturers documents for the
official information.
DPW P6 Assembly Instructions:
http://www.dpwsolar.com/index.php/applications/commercial/9-commercial/16-power-rail-mounting-
system-prm
DPW P6 and P8 WEEB Instructions:
http://www.we-llc.com/references/installation-manuals
Batteries:
We recommend deep-cycle batteries from Trojan or other major manufacturer. You can use 6, 8,12 or 24
volt batteries as long as they are wired for 48 volts. HotSpot does not provide batteries. Please source
your batteries from a reputable supplier and rely only upon the installation and use instructions provided
by the battery manufacturer.
PV Solar Panels:
Solar panels must be connected per NEC and per the PV manufacturers instructions and wired according
to the charge controller requirements. Mounting and grounding must follow the NEC and the
instructions provided by the manufacturers of the panels, mounting & grounding hardware, etc.
Ground Fault Protector (GFDI)
Note this is to be a GFDI device designed to protect equipment and is not a safety device. It is NOT a
GFCI. It will not protect from electric shock to a person. Use of a GFDI actually increases the safety risk
and therefore must be labeled accordingly. Reference model MNEPV80 80A Din Rail Breaker & MNDC-
GFP 63 amp Ground fault protector or similar. This is an installer-provided part.

Copyright 2013 HotSpot Energy 20
Outdoor Electrical Connections
Code Requirements
All installations must comply with national and local
electrical codes; professional installation is
recommended.
NEC requires ground fault protection for residential
PV installations. For more information, see NEC
690.5.
• The GFDI meets the requirements of the 2008
NEC section 690.5 (A) through (C)
to reduce fire hazards when wired according to the
wiring diagram contained in these instructions.
• All power production from PV array charge
controllers ceases when the breakers trip and
remove their connection to the batteries.