Installation and Piping of GRH3 air compressor

Monday - 29/07/2019 04:10
1.Installation and Piping
1.1  Identification of the product specifications
When accepting and unpacking the compressor, please check the specification such as pressure, voltage and frequency by using the plate attached on the left side. Check whether there is any damange/scratch or tranformation on covers during the transportation.

Weights of compressor models
                                                                                                       NOTE> GRH3-75W : 1383kg / GRH3-100W : 1500kg.
1.2 Cautions for Installation
The production can be used for a standard life as long as the installation place is well selected
Do not leave any dangerous(flammable) materials around the compressor. It
may cause a fire resulting from the heat generated during the operation.
Do not attempt any work potentially inducing a fire. The flame may be spread
into the compressor, possibly damaging the product.

Compressor Installation Place
Install the compressor in a bright, wide and well-ventilated place.
If an installation place is not wide enough , install a fan to limit the ambient temperature lower than 40ºC.
Piping space
When repairing and maintaining the discharge air pipe, secure a wide space.
Air inhalation space
A proper space should be secured to faciliate air inhalation.
When installating the compressor in a place with vibration, anti-vibration pad is to be used.
Cautions for Installation.
Install the compressor inside a building free of dust and with low ambient temperature.
Dusty materials such as metals,rock and dust.
Damaged air end due to deteriorated motor insulation.
Raindrop, underground and excessive moisture.
Electric shock, defective motor insulation malfuntion generation of condensed water and rust.
Place with harmfulgas.
Oxidized lubricant.
Install the compressor in a leveled place with little noise reflection .
    •  Install it horizonally on the ground:
    • Do not use any hard block as a trut:
    • Cautions against noise reflection from walls:
Install compressor in doors only. If the compressor is installed outside it may cause a trouble due to moisture and dust. Install air induction exhaust pipes in the installation place to ventilate properly. If ambient temperature rises due to the heart from the compressor, it may cause a warning trouble. 
2. Ventilation of compressor’s room.
 Warning: If the temperature of the compressor’s room is higher than the allowable temperature range, install a forced ventilation facility to ventilate promptly.
Operating the compressor at 40ºC
and higher for a long time may cause a fatal
Air Inlet
Prepare an air inlet larger than 1m2 per set at a lower place. The air inlet should be protected against dust.

Vent opening.
Vent opening is to be installed on the top of a building so that hot air is ventilated to the outside.

Vent duct.
  • When installing a vent duct, make sure to connect it to the compressor cooler’s upper vent.
  • When installing a vent duct on the compressor, install it in a structure to easily repair and maintain.
Ventilation data
Compressor models GRH3-20A
Ventilation vol.

105 105 105 105 105 300 300
 Installation of Ventilator
  • When installing a ventilator, refer to the following figure. If the compressor is installed in an airtight place or a place with lower ceiling, install the air inlet and vent opening as presented in the left figure and attach ventilation fan on the opening.
  • Locate the air inlet in a position with little moisture or dust and close to the ground. The opening should be attached to a position well ventilated to the outside.
  • When connecting a vent duct to the compressor’s cover, do not use a vis and instead, use a tab for the attachment on the compressor’s cover.
  • When installing a vent duct, install a net and similar devices at the end to prevent birds or impurities from flowing inside.
  • Manufacture a vent duct so that R is as large as possible to reduce ventilation resistance.
  • If any noise is generated from the vent duct, supplement heat-resistant sound-absorbing material inside it.
  • Attach the sound-absorbing material tightly.
Cautions of Piping
  1. General piping : when connecting a pipe to the main air pipe, connect a flange or union to the compressor’s discharge pipe to facilitate the repair, maintenance and disassembly of the compressor.
  2. By attaching a ball, valve or similar device on the discharge pipeline, make a valve closed when it stops for a long time and prevent moisture from flowing backward.
  3.  If the piping contains a concave or vertically upright pipe, attach a drain valve on the bottom.
  4. Open the drain valve when stopping the compressor to discharge the condensed water.
  5. In case of vertically upright pipe, give a distance about 600mm and more from the cover surface considering the repair works .
  6.  In case pipes from compressors join to the main pipe, connect them upright to avoid the backward drain.
 Cautions for parallel piping
Completely, close the stop valve of the discharge valve at the compress or that is manually stopped during the operation.
If opening the stop valve of the suspended compressor, the backward pressure is allowed to. After Cooler at the compressor, generating a drain, probably causing rust inside the cooler and check valve and subsequently, reducing the life of the compressor.
Cautions for parallel piping
Apply shock-absorbing materials to the reciprocating compressor so that the vibration of reciprocating compressor is not conveyed to the screw compressor, probably generating air leakage.
Receiver tank
The drain pipe on the bottom of the receiver tank should discharge the condensed water 4 times and more per week.
For the capacity of the receiver tank by the compressor capacity, refer to the following table.
                                                                               <The above data can be used to select a capacity depending on the air use conditions>
Caution: Since operating the compressor without the receiver tank may cause frequent loads and no-load pressure pulsation, possibly reducing the life, make sure to install the receiver tank.

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