2. INSTALLATION
Page 9
© 2007 DH Instruments, a Fluke Company
2.3.5
CONNECTING DRIVE AIR (DRIVE PORT)
Using a pressure connecting hose or tube of appropriate pressure rating, connect drive air
supply to the
DRIVE
port on the rear panel of PPCH-G. The
DRIVE
port connection is
1/8 in.
NPT female
. Use Teflon
™
tape or another thread sealant to minimize leakage.
If a
DHI
GB-H-152 is being used to supply pressure to the PPCH-G, the drive air may be
supplied from the GB-H-152
DRIVE OUT
port.
Drive air pressure must be between 500 and 800 kpa (75 to 120 psi).
2.3.6
CONNECTING HIGH PRESSURE GAS SUPPLY (SUPPLY
PORT)
Highly pressurized gas can be extremely hazardous. Before applying pressure to PPGH-G
and/or the system connected to it, be sure that all pressure vessels and connections are rated
for the pressure levels that will be applied and that all connections have been properly tightened.
Ensure that the PPCH-G is powered down, or if power is ON, it is in a vented condition (VENT LED
ON). Do not apply the supply pressure before reading Sections 2.4.1 and 2.4.3.
The PPCH-G
SUPPLY
port is for connection of the high pressure gas that PPCH-G controls.
Before connecting a high pressure supply, be sure that the PPCH-G is powered off, or if it is
off, that it is in a vented condition (vent LED ON). Do not apply the supply pressure before
reading Sections 2.4.1 and 2.4.3.
If a
DHI
GB-H-152 gas booster is being used for the high pressure gas supply,
interconnections to connect the booster output to PPCH-G
SUPPLY
port are supplied with
the booster. See the booster Operation and Maintenance Manual for details on setting up
the connection.
Using a pressure tube of appropriate pressure rating, connect the pressure supply to the
SUPPLY
port on the rear panel of PPCH-G. The
SUPPLY
connection is
DH500
F
.
DH500 is a gland and collar type fitting for 1/4 in. (6.35 mm) coned and left hand threaded
tube. DH500 is equivalent to AE F250C, HIP HF4, etc. DO NOT USE INCORRECT FITTINGS;
DAMAGE TO THE FITTING AND DANGER TO THE OPERATOR COULD RESULT.
The supply pressure should be
at least 5% of the PPCH-G range greater than the
maximum PPH-G pressure to be controlled but not greater than 115% of the PPCH-G
controller range. The minimum supply pressure is 70% of the PPCH-G range
. The
supply pressure must be
stable
±
1 %
and assure adequate flow to remain stable while
PPCH-G is slewing pressure for PPCH-G pressure control to operate within specifications
(see Section 1.2.3).
Never connect a pressure supply greater than 15 % over the maximum range of the PPCH-G
model you are using. Always use the correct fittings.
Take care NOT to connect the high pressure supply to a port other than the SUPPLY port.
CONNECTING THE HIGH PRESSURE SUPPLY TO ANY PORT OTHER THAN THE SUPPLY PORT MAY
DAMAGE THE PPCH-G AND MAY CAUSE OPERATOR INJURY.
