COLOER COT701S Low Voltage Transformer User Manual

COLOER COT701S Low Voltage Transformer

Features

• Power: 75W
• lnput: 120VAC,50/60Hz
• Output Voltage: 12/lSV AC
• Heavy duty 304 stainless steel
• Stainless steel standard finish
• Lifttime warranty

Package Contents

(1) Transformer

Product Dimensions

IMPORTANT SAFETY INSTRUCTIONS

WARNING
{for conduit connected POWER UNITI
RISK OF SHOCK. Install power unit at least 5 feet from a pool or spa and at least 10 feet from a fountain. Where the power unit is installed within 10 feet of a pool or spa, connect unit to a GFCI protected branch circuit.

WARNING
for Power Supply Cord connected POWER UNITE
RISK OF ELECTRIC SHOCK. Install powerunit at least 5 feet from a pool, spa or fountain. Where the power unit is installed {a)indoor within 10 feet of a pool, spa, or fountain, or!b)outdoor, connect power unit to a receptacle protected by a GFCI.

• THIS POWER UNIT MUST BE CONNECTED TO A COVERED GFCI RECEPTACLE MARKED ‘WET LOCATION WHILE IN USE
• CAUTION: FOR USE ONLY ON A BRANCH CIRCUIT PROTECTED BY A CL.ASS A TYPE GROUND FAULT CIRCUIT MERRUPTER
• FOR USE WITH LANDSCAPE LIGHTING SYSTEMS ONLYLANDSCAPE LIGHTING SYSTEMS ARE FOR OUTDOOR USE ONLY {NOT FOR USE IN DWELLING UNITS
• THIS DEVICE IS ACCEPTED A5 A COMPONENT OF A LANDSCAPE LIGHTING SYSTEM WHERE THE SUITABILITY OF THE COMBINATION SHAU. BE DETERMINED BY CSA OR LOCAL INSPECTION AlJTHORITIES HAVING JURISDICTION
• DO NOT CONNECT TWO OR MORE POWER SUPPLIES IN PARALLEL
• DO NOT MOUNT POWER SUPPLY OR FIXTURES Vv’ITHIN 3 METERS (10 FEETI OF A SWIMMING POOL OR SPA
• DO NOT USE AN EXTENSION CORD Vv’ITH THIS POWER SUPPLY

SIZING TRANSFORMER

• The total wattage(Wl – or volt – amps[VA) for LED – of all of the fixtures operated by this transformer must not exceed the wattage rating of the transformer

• If you are powering halogen lamps

• Calculate the load by adding the wattage of the lamps in the system.Make sure the load does not exceed the wattage rating of the transformer.

• If you are powering LED lamps or fixtures calculate the load by adding the volt/amp (VA)values of all of the lamps in the system. VA is calculated using the following formula:

• If the power factor of the LEDs is unknown, use 0.7 as the value for this calculation. Once you have determined the total wattage or total VA value of the run, make sure that the transformer that you have selected has excess capacity in the event that new fixtures are connected to the system at a later date.

• Example:
  15 fixtures are each operating a 3W LED lamp with an unknown PF value.

A transformer with a maximum wattage rating of 150W can be utilized.

MOUNT THE TRANSFORMER UNIT

1. Remove transformer door for easy access

2. Find a solid, flat suriace to mount the transformer in a location:
   That is at least 12 inches between the tenninals and ground level with wire terminals facing down
   Six feet or fewer from a 120V supply circuit that is protected by a Class A type ground fault circuit intem..ipter.

3. Insert load bearing screws or wall anchors into pre-drilled holes that align with the corresponding keyhole slots on the transformers mounting brackets.

4. Secure the transformers keyhole slots on the mounting brackets to the load bearing screws Wall anchors.

MOUNT THE TRANSFORMER UNIT

• Remove the bottom plate from the transformer.
• Using a flat head screvvdriver, adjust the common tap and appropriate low voltage tap(s) (labeled 12V-15V or 12V-22V) on terminal block to accept secondary wires.
• Run the secondary wire cables through the knockouts in the bottom plate.
• Separate the wires from each pair and strip both approximately one inch.
• Connect one wire from each pair to the common tap and the other wire to the appropriate low voltage tap.
• Secure the wires to the taps by tightening the common tap and the low voltage taps with a flat head screwdriver.

CHECK VOLTAGE AT EACH FIXTURE

It is very important that the secondary voltage provided to each fixture is within the input voltage range of the lamp or fixture. Halogen lamps and some LEDs have an input voltage rating of 12V. If the specified input voltage range is 12V, the input voltage provided to the fixture must be between 11V and 12V.lf the voltage at the socket exceeds 12V, light output of the lamp will be higher but average rated life will be lower. If the voltage at the socket is lower than 11V, light output will be lower and average rated life will be higher. Many LEDs have an input voltage range of 10V-15V,or 10V-18V For LEDs with input voltage ranges, input voltage supplied to the lamp within that range is acceptable.

• Plug the transformer into a covered 120V GFCI receptacle.
• Switch on the transformer to provide secondary voltage to the fixtures.
• Using a voltmeter, check the voltage at each fixture.
• Make sure that the voltage at each fixture is within the specified input voltage range of the lamps or integrated LED fixtures.
• If the measured voltage falls outside of the specified input voltage range of the lamps or integrated LED fixtures, adjust the voltage to the acceptable range by moving the wire to higher/lower voltage tap.

CHIECK OUTPUT AMPS

After checking the voltages on the run, use a clamp-on meter to measure the output current on the low voltage cable at the transformer for each circuit. Make sure thatthe output current of the circuit is below the maximum rated Amperage.

DETERMINE INPUT AMPS

This unit is provided with a looped wire that is attached to the optional photocell plug. Use a clamp-on meter around the looped wire to measure the input current. Apply the clamp on the amp meter around the looped wire to get an input current measurement. Make sure that the input current of the system is belovv the maximum rated input current

Determine System Load and Voltage Drop

Low voltage landscape system voltage drop occurs along the secondary wire and is affected by the distance of the run, the total wattage of the system, and the gauge of the wire. As a result, fixtures at the end of the systems run will receive lower voltage than fixtures near the beginning of the run Voltage loss can be minimized in different ways. Low voltage wire is necessary to run from the secondary power on the transformer to the fixtures it wrn operate in the system. Low voltage wire is measured by gauges. ThiMer wire has a higher number and has a lower maximum load. The lower the wire number, the thicker the wire and the more current it can carry. Consequently, thicker wire reduces voltage drop so it is suggested that 8/2, 10/2, or 1212 wire isused for low voltage landscape lighting systems. Below is a table that lists the cable constant value of different wire gauges:

Example:
A 75 ft. run with 100W load using 12/2 wire Voltage Drop=(75 x 100 x 2)T7500=2V. This means that a 14V tap is needed to deliver 12V to the final fixture on the run.
One way to minimize voltage drop in this example is to spread the load to separate wire runs. Wiring the system effectively is another Wo>f to minimize voltage drop.

customersupport@coloer.com / 626-699-4666

www.coloer.com

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