Vanner 20-1050CUL User manual

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
ii
Table of Contents
Section 1—Introduction ................................................................................1
Section 2—Installing the 20-1050CUL...................................................................4
Section 3—Installing the IFM1 Interface Module ............................................6
Section 4-- Installing the Inverter & Charger Remote Panels ........................... 8
Section 5—Inverter & Charger Remote Panel Operation ................................ 9
Section 6—Operating the 20- 1050CUL Inverter/Charger .......................... 10
Section 7—Troubleshooting........................................................................... 11
Section 8 —GFCI Test Record ............................................................................. 12
Warranty.................................................................................................................. 13
List of Figures
Figure 1 —System Diagram ........................................................................... 2
Figure 2 —Federal Specification KKK-A-1822D Diagram ........................... 7
Figure 3—1FM I Module Remote Wiring .................................................. 8
Icon Legend
Note Warning
VANNER INC.
4282 Reynolds Drive, Hilliard, Ohio 43026
800-AC POWER
Tel [phone] • F a x ( 61 4 ) 771-49 0 4 • www .vanner.com
20-1050CUL--OWNERS MANUAL
c Copyright 1996, Vanner, Inc.
OM/A96283 REV. B

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
1
Section1: Introduction
Thank you for purchasing a Vanner 20-1050CUL Power Inverter/Battery Charger for your
emergency vehicle. We are confident you will be satisfied with its performance.
Vanner products are designed and manufactured by skilled professionals using the highest
standards in workmanship, guaranteeing excellent performance and reliability for your emergency
vehicle. With minimum maintenance and care, you can expect years of trouble-free service from
your Vanner product.
The 20-1050CUL is a 12 VDC to 120 VAC inverter with a built-in battery charger/conditioner and
transfer relay. This unit is equipped with an AC line cord for connecting AC input power
(shore/utility power) and a receptacle with a Ground Fault Circuit Interrupter (GFCI) for AC
output. This enables you to plug AC loads directly into the inverter. The DC cables have quick
connectors to facilitate installation and pre-wiring of emergency vehicles.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
2
FUNCTIONALITY
Inverter
The 20-1050CUL converts battery power to 1050 Watts of 120 VAC modified sine wave
power to operate vital emergency vehicle equipment. The unit is easily connected to the
positive and negative posts of a battery system with appropriate fusing, and when turned
on produces 120 VAC True RMS power.
The inverter also has an energy-saving feature called Load Demand. With this feature the
inverter output is pulsed significantly reducing the current draw from the battery until a
demand is made on its output. Continuous output of 120 VAC resumes when a load greater than 5
Watts is applied. The load demand feature can be disabled with the Setup Switch on the front panel.
A built-in transfer relay switches the AC output receptacle from the inverter to the AC
input when the unit senses AC input from the shore/utility power.
BatteryCharger
The 20-1050CUL Battery Charger's superior design incorporates a multi-stage charger.
This design enables the unit to automatically charge batteries, maintaining the battery's
integrity and reducing the likelihood of premature failure.
 High Charge Mode
While in the High Charge mode, the unit continuously charges at a constant current of 55
Amps (high setting) for large battery banks, or 15.0 Amps (low setting) for
small battery banks (such as two group 31 batteries). The unit will charge until the
battery cells reach 14.2 VDC for flooded batteries. or 19.1 VDC for gel batteries.
The unit then supplies a fixed voltage until the battery is fully charged.
 Ready/Maintenance Mode
The charger automatically enters the Ready/Maintenance mode, maintaining the battery's proper
voltage of 13.2 VDC for flooded batteries or 13.6 VDC for gel batteries. This Ready/Maintenance
mode is designed to eliminate gassing (overcharging), helping to extend the life of the battery.
A Setup Switch is located on the front panel for selecting the type of battery (Flooded
Lead Acid or Gel Lead Acid), the battery charger output current (High/Low), and Load
Demand(On/Off).
WARNING
Battery input cables
must be connected to
the battery
with proper polarity
to avoid damaging
the inverter.
NOTE
If the battery is fully
charged at the time AC
input is applied, the unit
will go
directly into Ready/
Maintenance mode.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
3
Specifications
**Note: If GFCI trips and the inverter is in load demand mode the GFCI may not reset until you toggle inverter off and
back on and then you will have 5 seconds to reset GFCI before unit goes back into load demand again or you can disable
load demand via dipswitch, if available.
Inverter
20-1050CUL
Output at 120 VAC RMS (Continuous Power Rating)
1050 Watts
Surge Capacity at 120 VAC (3 sec)
2100 Watts
Input Voltage, VDC
12 VDC, Nominal
(Deep Cycle Battery Recommended)
10.5 VDC min., 16.0 VDC max.
Output Voltage
120 VAC ± 5%
DC Current Draw (Battery)
OFF
0.017 Amps Typical
Load Demand (waiting)*
0.09 Amps Typical
Full ON at No Load
0.7 Amps Typical
Full ON with Load
Approx. AC Load Watts ÷ 10 or AC Load Amps x 12
Frequency
60 Hz ± 0.1%
Output Wave Form
Modified Sine Wave
Battery Charger
Charging Capacity*
55 Amps (High)
15.0 Amps (Low)
Input Voltage
120 VAC ± 10%
Input Current
8.0 Amps
Bulk Voltage*
14.2 VDC (flooded), 14.1 VDC (gel)
Float Voltage*
13.2 VDC (flooded), 13.6 V (gel)
Bypass Transfer
Output Current, GFCI Outlet**
12 Amps
Other Specifications
AC Input Termination
Hardwire Box, or 3ft. Line Cord
AC Output Termination
Duplex GFCI Receptacle
Ambient Temperature
-20° to +110°F, -29° to +43.4°C
Cooling Air
Fan Cooled, 30 cfm
Chassis
Aluminum
Dimensions
11.57”W x 5.94”H x 11.04”D
Weight
22 lbs
*Determined by Setup Switch setting on front panel.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
4
Note
Air enters by the fan at
the rear of the unit, and
exits through the sides
of the unit. For
maximum unit
performance, avoid
recirculating the same
hot air through the
unit.
WARNING
Battery input cables
must be connected
to the battery with
proper polarity to
avoid damaging the
inverter.
Section 2: Installing the 20-1050CUL
Unpacking the Inverter
Inspect the shipping container and equipment for loose or damaged parts. If
any damage is found, immediately notify the freight carrier.
Installing the Inverter
Step 1: Turn the inverter OFF/disconnect power to the wiring harness. Make
sure power to the vehicle wiring harness is disconnected. Verify
that the inverter is turned OFF by checking that the ON-OFF/RESET Inverter Switch is
in the OFF-RESET position. (The
button should NOT be pushed in.)
DC Cable Length
Size
Maximum
2AWG
12ft.
1/0AWG
20ft.
Step 2: Select a location for the unit.
An ideal installation location has the following characteristics:
• Close to the battery (within six feet using #2 AWG wire)
• Protected from the weather
• Protected from the weather
Step 3: Route DC input cables.
Route the negative and positive DC input cables from the inverter (through the quick
connector) to the battery. If required, protect cables where they contact hard, sharp edges.
Step 4: Install inline fuse.
Install an inline Bussman ANN 125 or equivalent fuse (Vanner p/n 03640-fuse and 03637-fuse
holder) in the red, positive DC input cable between the battery and inverter, within 18 in. of
the battery or DC wiring bus system.
Step 5: Connect bonding lug.
Use a AWG #8 or larger copper conductor to connect the chassis bonding lug to the vehicle
chassis and/or earth ground.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
5
WARNING
Improper Battery
Type Switchsetting
maydamage
batteries.
WARNING
Batteryinputcables
mustbeconnectedto
thebatterywith
properpolarityto
avoiddamagingthe
inverter.
Step 6: Connect the inverter to the battery.
Connect the black, negative DC input cable from the quick connector to the battery
negative (-) terminal. This battery negative terminal is usually where the battery negative
connects to the engine block or frame. Connect the red, positive DC input cable from the
quick connector to the in/line fuse near the battery positive (+) terminal. This battery
terminal is usually connected to the DC electrical system at the load side of the Battery
disconnect Switch.
Step 7: Select Load Demand option.
Select Load Demand option if desired, using the proper switch position on the front panel
Setup Switch. With Load demand ON, the inverter conserves battery energy and operates only
when a load greater than 5 Watts is applied.
Step 8: Select battery type.
The charger is capable of charging both gel and flooded lead acid batteries. Select the
battery type using the Setup Switch on the front panel.
Step 9: Select the charging rate.
In the high position the charge is 55 Amps. In the low position the output is 15.0 Amps.
We recommend the low position as the best selection when two (group 31 or smaller)
batteries are used. Charging at too high of a rate for a given battery will damage the
batteries.
Step 10: Connect the AC loads.
Connect the AC loads to the inverter GFCI receptacle. Any time AC power is applied to the
AC input (shore/utility power), it will pass through this GFCI receptacle.
Step 11: Verify installation.
Verify all connections are tight and secure for maximum performance.
Inverter LED Displays
Inverter
Light Action
Description
Steady Green Light .
Inverter is On and operating
Single Blink Green Light
Inverter circuit is Off. Shore power is On and supplying AC power to the
AC loads. The inverter will turn On and supply the load if shore power is
lost.
Double Blink Green Light
Inverter circuit is Off. Shore power is Off. The inverter is waiting for a load
greater than 5 watts to be turned on.
Battery Low
Light Action
Description
Solid red
Inverter is On and the battery is almost too low to operate the inverter.
Blinking Red
The inverter is Off. The battery voltage dropped below 10.5 volts DC and
the inverter shut itself Off. Once shut off, the batteries must be recharged.
Then, the inverter On/Off switch must be cycled to reset the unit.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
6
NOTE
RefertotheIFM1
manualforPin
identificationand
description.
Inverter LED Displays cont.
Overtemp
Light Action
Description
Solid red
The unit is Off. The unit has turned itself Off because the power MOSFET's
are operating too hot. This can be caused by operating an AC load which
is too large for the inverter, or lack of ventilation. When the unit cools the
inverter will start operating again.
Overload
Light Action
Description
Blinking Red
The inverter is On but it is overloaded. Reduce the AC load quickly or the
inverter will shut off due to the overload condition.
Solid red
The inverter is Off. An overload has occurred and the inverter has shut off
to protect itself. Once shut off, the inverter On/Off switch must be cycled to
reset the unit.
Charger High
Charge
Light Action
Description
Blinking Yellow
The charger is operating. The batteries were low and in need of a charge.
The charger is in the process of charging the batteries to the bulk voltage.
The charging current is limited based on the position of the Charger High/
Low switch.
Charger
Ready/Mainten
ance
Light Action
Description
Solid Green
The charger is operating. The batteries are near full charge and the
charger is in the maintenance mode. In this mode, the charger is holding
the batteries at the float voltage. The charging current is limited based on
the position of the Charger High/Low switch.
Section 3: Installing the IFM1 Interface Module
This section describes the installation of the optional Vanner Model IFM 1 Interface Module.
Refer to the information provided in the IFM 1 Interface Module Owner's Manual for
information on installing the inverter and interface module in a vehicle rewired or retrofitted
for the 20-1050C UL.
If you are installing a new 20-1050 CUL unit, you will need the interface module only if you
are using the inverter or charger status panels (p/n D06638 or D06639), Remote Switch (pin
D06781), or if you need to use the inverter lockout feature.
Installing the IFM1 Interface Module
Step 1: Mount the Interface Module.
Mount the interface module in the vehicle's existing 12 V electrical system wiring harness with #8
screws. Select a physical orientation best suited for your application environment; however, it must be
close to the inverter as the interface cable is 2 ft. in length. Additionally, the unit should not be
installed with pin connections facing upward.
Step 2: Connect the inverter to the Interface Module.
Install the 2 ft. interface cable by plugging it into the remote RJ-11 connector on the 20-1050CUL, and
the J1 connector on the IFM1 Interface Module.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
7
Step 3: Connect the Battery Disconnect Switch.
Connect the +12 V lead from the Module Disconnect Switch circuit to the inverter
lockout Pin 1 (ignition switch or battery disconnect switch). The
+12 V lead from the Battery Disconnect Switch must be fused with an inline fuse or
circuit breaker of 2 Amps or less. See Figure 3.
Step 4: Wire the Remote Switch (p/n D06781) to Pins 2 through 5.
Red to Pin 2, Black to Pin 3, Green to Pins 4 and 5. If no remote switch is used,
two jumpers must be installed. The first jumper connects Pin 2 to Pin 3,
the second jumper connects Pin 4 to Pin 5. See Figure 3.
Step 5: Connect the Inverter Remote Status Display Panel (Optional).
Connect the gray, green, and red wires from the inverter panel, through the OEM
harness, to the IFM1 Module, Pins 6 (grey), 7 (green) and 8 (red).
Step 6: Connect the Charger Remote Display Status Panel (Optional).
Connect the brown, white, and black wires from the charger panel, through the OEM
harness, to the IFM1 Module, Pins 9 (brown), 10 (white) and 11 (black)

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
8
Section 4: Installing the Inverter and Charger Remote Status Display Panels
Both the inverter and charger Remote Status Display Panels contain a red and green LED
indicator. On the inverter status panel, the green indicator light signifies the unit is ON or in
the Standby mode. On the charger status panel, the green light indicates the presence of shore
power or that the battery is being maintained at its current level. For both the inverter and
charger, the red, Fault LED indicator shows problems such as over temperature, output
overload, or low battery.
The panels have a sealed overlay which mounts easily on a flat surface, Each panel is
equipped with a 12-in. pigtail harness for easy installation. The following installation
procedure applies to both the inverter and charger panels:
Step 1: Select a location for the panel.
Identify the desired location for the inverter and charger panels.
Step 2: Identify wires for installation.
Identify the gray, green, and red wires on the inverter panel and vehicle's electrical
system. Identify the brown, white, and black wires on the charger panel and the
vehicle's electrical system.
Step 3: Splice and arrange wires.
Splice together like-colored wires from the vehicle's electrical system to the status
panel using an insulated butt splice or equivalent. Carefully arrange the wires such
that the panel mounts flush against the surface to which it is mounted.
Step 4: Secure panels to surface.
Mount the panels using #8 screws through the four holes in the panel
NOTE
When the remote charge
indicator panel is
installed to the outside of
the vehicle, the status
panel should be sealed
with RTV.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
9
Section 5: Inverter and Charger Status Panel Operation
Two LEDs on the front of the Remote Status Display Panels indicate the status of the inverter and
charger. The status indicated by these LED displays is directly related to the status indicated by the
LEDs on the front of the inverter and charger.
Inverter Led
Light Action
Description
Steady Green Light
Inverter is operational.
Single Blink-Green Light
Inverter is not being used. Shore power is applied to load. Inverter will
Activate when shore power is unavailable.
Double Blink-Green Light
Inverter is on in the Load Demand mode and is waiting for AC load to
be turned ON.
Inverter Fault LED
Light Action
Description
Red Light
Unit shutdown* —Check the inverter's front panel LEDs for reason of
shutdown: Low Battery, Overload, or Overtemp.
*Refer to the Troubleshooting section of this manual for fault diagnostic information.
Charger LED
Light Action
Description
Blinking Green Light
AC (shore/utility power) is present and battery charger is in the High
Charge (Bulk) mode.
Steady Green Light
AC (shore/utility power) is present and the battery charger is in the
Maintenance (Float) mode.
Charge Fault LED
Light Action
Description
Red Light
Unit shutdown* —Check the inverter's front panel LEDs for reason of
shutdown: Low Battery, Overload, or Overtemp.
*Refer to the Troubleshooting section of this manual for fault diagnostic information.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
10
Section 6: Operating the 20-1050CUL Inverter/Charger
Use the following instructions to operate the 20- 1050CUL Inverter.
Step 1: Install the 20-1050CUL unit.
Completely install the inverter and charger using the instructions provided in
Section 2 of this manual.
Step 2: Start the vehicle.
Turn the Battery Disconnect Switch on and start the vehicle.
Step 3: Turn switches on.
Turn on the Module Disconnect Switch and the Inverter Remote Switch.
Step 4: Apply shore power to the 20-1050CUL/Ambulance shore line connection.
After shore power has been connected one of the Charger LEDs will light or
flash. Push the ON-OFF/RESET Inverter Switch to the ON position. The
inverter lamp will flash, indicating that the inverter is standing by.
Step 5: Verify Power.
Apply an AC load, such as a shop light or drill. The AC load is run directly from shore/
utility power.
Step 6: Observe the inverter operation.
Remove the shore line connection from the emergency vehicle. The unit will
automatically switch to Inverter mode and operate the AC load using battery power. When
shore power is restored, the unit examines the AC input for five seconds and then
switches the loads back to run directly from AC/shore power.
With the ON-OFF/RESET Switch in the ON position, a double flash of the ON light
indicates the load demand is turned ON and the load is less than 5 Watts.
NOTE
Throughout this manual,
shore/utility power is
referred to as AC input
power.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
11
Section 7: Troubleshooting the 20-1050CUL
The following are the most common questions heard by Vanner service professionals. If
your situation does not apply to the following categories, please contact your local Vanner
Incorporated Service Center.
Vanner Incorporated Customer Service:
1-800-AC-POWER
SYMPTOM
The LEDs on the front panel blink in sequence.
SOLUTION
It is normal for this to occure if the inverter switch is On when the DC input is connected to
the unit.
If the DC is already connected and the LEDs blink in sequence then the DC input is dipping
in voltage.
Check for poor connections in the DC wiring, bad battery, or a heavy DC load.
SYMPTOM
ON lamp does not light steadily after pushing in the ON-OFF/RESET Inverter Switch.
SOLUTION
Lamp flashes when utility power is present.
Lamp flashes in Load Demand Waiting mode.
Check/Reset GFCI on the receptacle.**
Check battery connections if utility power is OFF.
Check DC fuses if utility power is OFF.
SYMPTOM
ON lamp fully illuminates. AC load does not run.
SOLUTION
Check and reset circuit breaker and GFCI receptacle**.
Verify AC load and cord are in proper condition.
SYMPTOM
BATTERY LOW lamp illuminates when AC load is applied.
SOLUTION
Check battery connections.
Check battery condition.
Recharge battery if voltage is less than 10.5 VDC.
Check the vehicle's alternator charging system for proper operation.
SYMPTOM
OVERTEMP lamp illuminates.
SOLUTION
Something has caused the unit to overheat. Check for obstruction of air flow to the cooling
fan or from ventilation holes. Verify AC load is within unit’s rated capacity.
SYMPTOM
OVERLOAD lamp illuminates with AC load applied.
SOLUTION
Verify AC load is within unit’s rated surge and continuous capacity.
SYMPTOM
DC fuse blows when connecting DC input cables.
SOLUTION
Check for reverse polarity: red cable to battery positive (+), black cable to battery negative
(-). The unit may be damaged and require repair service.
**Note: If GFCI trips and the inverter is in load demand mode the GFCI may not reset until you toggle inverter off and back
on and then you will have 5 seconds to reset GFCI before unit goes back into load demand again or you can disable load
demand via dipswitch, if available.

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
12
Section 8: GFCI Test Record
For maximum protection against electrical shock hazard, operate the Test Switch on the
Ground Fault Circuit Interrupter at least once a month.
ENTER
YEAR
JAN
FEB
MAR
APR
MAY
JUNE
JULY
AUG
SEPT
OCT
NOV
DEC
20_

V A N N ER I N CO R P OR A T ED 20-1050CULINVERTER/CHARGER—OWNER'SMANUAL
13
Limited Warranty
1. Vanner Inc., warrants that this product is free from defects in materials and workmanship for a period of one (1) year
from its date of shipment from Vanner's factory.
2. This warranty does not cover defects caused by misuse, neglect, accident, reversed polarity, unauthorized repairs,
and/or replacements.
3. All warranties of merchantability and fitness for a particular purpose; written or oral, express or implied, shall extend
only for a period of one (1) year. There are no other warranties which extend beyond those described on the face of this
warranty.
4. Vanner does not undertake responsibility to any purchaser of its product for any undertaking, representation, or
warranty made by any dealers or distributors selling its products beyond herein expressed.
5. Vanner does not assume responsibility for incidental or consequential damages, including, but not limited to
responsibility for loss of use of this product, loss of time, inconvenience, expense for telephone calls, shipping expense, loss
or damage to property, or loss of revenue.
6. Vanner reserves the right to repair, replace, or allow credit for any material returned under this warranty. Any damage
caused by the customer will be charged or deducted from the allowance.
7. All warranty work will be performed at Vanner's factory, or authorized repair facility. Products shall be delivered to
Vanner's facility, freight prepaid. Products repaired under warranty, or replacement parts or products will be returned,
F.O.B. Vanner factory.
Vanner Inc.
4282 Reynolds Drive
Hilliard, Ohio 43026
Tel [phone]
Fax [phone]
www.vanner.com
Specifications Subject to Change
Copyright 1996, Vanner Inc.
Printed in the USA
OM/A96283 REV B 8/2016