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© 2015 Mitsubishi Electric US, Inc. 

2

 • Only use the specified cables; 

securely connect each so that 

 

the terminals do not bear any 

 

cable weight.

Improperly connected or short-circuited 

cables may produce heat and cause 

a fire.

 • Do not make any modifications or 

alternations to the device.

Modifications or improper repair may 

result in electric shock or fire. Consult 

your dealer for repair.

 • All electrical work should be 

performed by an authorized 

electrician according to local 

regulations and instructions 

outlined in this manual.

Capacity shortage to the power supply 

circuit or improper installation may 

result in electrical shock or fire.

 • Properly install the device 

according to the instructions in this 

Installation/Instruction Manual.

Improper installation may result in 

electric shock or fire.

 

Caution

 • Do not install the device in a 

location where a flammable gas leak 

 

may occur.

Gas may leak, collect around the 

device, ignite, and/or explode.

 • Do not install the device in 

environments where large 

amounts of oil (including machine), 

sulfidizing gas, or acidic, alkaline, 

chemical sprays are present.

These types of substances may 

damage internal parts, cause device 

performance to be reduced, and cause 

electrical shock.

 • Do not install the device in a 

bathroom, kitchen, or any room 

where steam could form. 

Condensation may develop and cause 

electrical shock and/or the device to 

malfunction.

 • Use standard wires with the proper 

current capacity 

to avoid the possibility of current leak, 

excessive heat, and/or fire.

 • Do not touch the main circuit board; 

also, make sure that dust does not 

accumulate on the circuit board.

 • When installing the device in a 

hospital, communication facility, 

etc., provide sufficient protection 

against frequency noise.

Power generators and inverters, 

high-frequency medical, or radio 

communication equipment may 

interfere with the normal operation of 

this device. Subsequently, the device 

may also affect medical treatment, 

image broadcasting, etc., by creating 

frequency noise.

 • Include some slack in the power 

supply wires.

Tension on the wires may cause them 

to excessively heat up and/or break, 

resulting in a fire.

 • Do not install the device in a 

location where there is direct 

sunlight or where the temperature 

may become greater than 40°C 

(104°F) or less than 0°C (32°F).

If the device is installed in such 

place, it may result in deformation or 

malfunctions.

 • Do not immerse the device in water.

Doing so may lead to electric shock or 

malfunctions.

Thermostat Interface

sandium.com

Содержание PAC-US444CN-1

Страница 1: ...ety precautions before use Hazards that can occur from incorrect handling are classified by the symbols below Warning Incorrect handling can result in death serious injury etc Caution Incorrect handling can result in bodily injury and or structure damage After reading this manual keep this manual for future reference When the device is reinstalled or repaired give this manual to those who provide ...

Страница 2: ...e internal parts cause device performance to be reduced and cause electrical shock Do not install the device in a bathroom kitchen or any room where steam could form Condensation may develop and cause electrical shock and or the device to malfunction Use standard wires with the proper current capacity to avoid the possibility of current leak excessive heat and or fire Do not touch the main circuit...

Страница 3: ...sition 1 All wiring shown should be performed with 18 AWG thermostat wire 2 Terminals on the PAC US444CN 1 support 20 30VAC 3 High medium low fan signals are optional and may not be available on all thermostat models 4 W2 and Y2 signals are optional and may be omitted for single stage thermostats Example 1 Two stage Cooling and Heating Note When both Y2 and W2 are connected it is recommended to se...

Страница 4: ...e When either Y2 or W2 is left unconnected it is recommended to set SW2 6 to the OFF position Example 3 Single stage Cooling and Heating with Dedicated Fan Speed Relays Note When connecting only first stage signals Y1 W1 it is recommended to set SW2 6 to the OFF position sandium com ...

Страница 5: ... Heating G G Fan 4 How to Install 1 Choose a place where to install the PAC US444CN 1 The device provides two mounting holes that can be used to mechanically affix the case to a solid surface Double sided tape may be used to affix the device When using tape ensure that the tape is approved for use within the anticipated operating temperature ranges 2 Install the transformer as necessary per buildi...

Страница 6: ...ollowing settings SW1 3 SW1 4 Result OFF OFF Auto Default ON OFF Medium OFF ON High ON ON Custom Auto Note Custom Auto provides more comfortable fan speed operation vs the more efficient Auto default Two Stage Thermostat Operation SW2 6 Adjusts indoor unit operation during stage 1 heating and stage 1 cooling according to the following table SW2 6 Operation during stage 1 OFF Full capacity ON The c...

Страница 7: ... Set by SW2 4 2 ON ON OFF 3 1 Set by SW2 4 2 ON ON ON 3 2 Set by SW2 4 2 Refer to the appropriate Indoor Unit Installation Manual for Mode 8 and Mode 10 function setting definitions CN24 Operation During Defrost SW2 4 Adjusts Mode 23 function settings according to the following table SW2 4 Result Fan and CN24 OFF Setting 2 Default ON ON Setting 1 OFF Refer to the appropriate Indoor Unit Installati...

Страница 8: ...e thermostat s temperature sensing is used to set the room temperature The indoor unit thermistor is used when calculating cooling and heating rates of change 5 Usage Operate the third party thermostat per the manufacturer s instructions During normal operation the connection of Mitsubishi remote controllers e g MA ME is not supported as they will interfere with the correct operation of the PAC US...

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