
Note
If a hot gas bypass kit was provided by others, refer to the manufacturer’s instructions.
3. Install Suction Line
Install suction line(s) from the compressor to the suction connection(s) which are stubbed through the side of the cabinet.
4.Install the Liquid Line and Thermal Expansion Valve (TEV) (By Others)
Liquid line openings vary by coil size and circuiting and are
a tubing cutter to cut off the plugged end of the
| Suction Header | Coil |
|
| |
Liquid Line | Distributor |
|
| Equalizer Line |
|
| Nozzle |
|
Thermal
Expansion
Valve (by others)
Suction Line |
| |
Remote Sensing Bulb | Straps | |
Suction Connection | ||
|
General Installation
5.Mount the Remote Sensing Bulb (By Others)
The expansion valve’s remote sensing bulb should be securely strapped to the horizontal run of the suction line at the 3 or 9 o’clock position and insulated.
6. Check Coil Piping for Leaks
Pressurize the coil to 100 psig with dry nitrogen or other suitable gas. The coil should be left pressurized for a minimum of 10 minutes. If the coil holds the pressure, the
If the pressure drops by 5 psig or less,
7. Evacuate and Charge the Coil
Use a vacuum pump to evacuate the coil and any interconnecting piping that has been open to the atmosphere. Measure the vacuum in the piping using a micron gauge located as far from the pump as possible. Evacuate the coil to 500 microns or less and then close the valve between the pump and the system. If the vacuum holds to 500 microns or less
®
for one minute, the system is ready to be charged or refrigerant in another portion of the system can be opened to the coil. A steady rise in microns would indicate that moisture is still present and that the coil should be further vacuumed until the moisture has been removed.
Note
Failure to obtain a high vacuum indicates a great deal of moisture or a small leak. Break the vacuum with a charge of dry nitrogen or other suitable gas and recheck for leaks. If no leaks are found, continue vacuuming the coil until the desired vacuum is reached.
8. Install the Drain Line
Connect an
unobstructed drain line to the drain pan. A
trap should be used to |
| 6 in. min. |
Drain |
| |
prevent sewer gas from | 6 in. min. | |
being drawn into the | Trap |
|
unit. |
|
|
Important
All traps must be installed below the roof line or be otherwise protected from freezing.
Model IG / IGX