Model 422 & Model 422CC Instruction Manual
D01187869
Revision A, December 2015
11
4
Installation
The instrument’s center of gravity is located near the front of the
instrument due to the weight of the pressure vessel. Be very
careful when rolling or transporting the instrument that it does not
tip over toward the front.
It is ideal to leave room behind the instrument so that qualified
personnel may have service access. If this is not possible, try to
make the unit easy to disconnect and move for service.
Once the instrument has been moved to its desired location, air, water, and
electrical connections can be made. The air inlet, water inlet, and water drain
connections are each ¼ inch female NPT connections and are located on the lower
right rear of the instrument. A number of ¼ inch male NPT to 8mm tube fittings are
included for international locations. The air and water inlet connections may be
made with either metal or plastic tubing. It is recommended that the water drain
lines be made from metal, since this line may carry very hot water and steam from
time to time. Electrical connections are made using the twist lock receptacle on the
rear of the instrument. A 30 amp female plug is included with each consistometer.
Please observe the following precautions when making the wiring
connections.
•
A qualified installer should do the wiring in accordance with local electrical
codes.
•
The instrument should be securely connected to a separate earth ground.
The ground wire must be larger in diameter than the supply conductors. An
8-gauge minimum ground wire is recommended for a dual consistometer
and a 10-gauge minimum ground wire is recommended for a single
consistometer.