Bühler technologies RC 1.2 Rack Kurzanleitung Seite 14

RC 1.2 Rack, RC 1.2+ Rack
Glass vessels and automatic condensate drains are available
for draining condensate for external mounting below the
unit. When using automatic condensate drains, the sample
gas pump must be installed upstream of the cooler (pressure
operation) to ensure proper function of the condensate drain.
If the sample gas pump is located at the cooler outlet (suction
operation), we recommend using glass condensate traps or
peristaltic pumps.
4.2.1 Connecting the filter gas connections (optional)
The connection between the heat exchanger outlet and the fil-
ter inlet does not have tubing included. The connection G1/4
or NPT 1/4" (filter head marked NPT) for the gas outlet must be
carefully and properly connected using a suitable screw con-
nection.
When ordering the cooler with the option filter without Mois-
ture detector, a bypass may be connected to the filter head.
The filter head is intended for a G1/4 internal screw thread
which is plugged at the factory. To use it, unscrew the plug
and screw in a suitable screw connection. Pay attention to
leaks.
NOTICE
Installing filters limits the maximum approved operating
pressure in the system!
Operating pressure ≤ 4 bar
4.2.2 Flow adapter connection (optional)
When ordering the cooler with the option moisture detector
without filter, it will be factory installed inside a flow adapter.
The connection between the heat exchanger outlet and the
flow adapter inlet does not have tubing included. The connec-
tion G1/4 or NPT 1/4" (flow adapter marked NPT) for the gas
inlet/outlet must be carefully and properly connected using a
suitable screw connection. Here the direction of flow is not
relevant.
4.2.3 Connecting the moisture detector (option)
When ordering the cooler with moisture detector option, it
will be factory installed inside a flow adapter, or for the filter
option installed and connected in the filter head.
4.2.4 Peristaltic pump connector (optional)
Coolers ordered with attached peristaltic pump already have
it installed and wired. Heat exchangers ordered at the same
time are already installed and connected to the peristaltic
pump.
The ø6 mm (0.24 inch) hose nipple for the pump's condensate
outlet must be carefully and properly connected with a suit-
able hose and hose clamp.
Versions with screw connections DN 4/6 or 1/6"-1/4" are sup-
plied with ferrule and knurled nut and must be carefully
sealed with appropriate hose.
NOTICE
Installing peristaltic pumps CPsingle / CPdouble limits the
maximum permissible operating pressure in the system!
Operating pressure ≤ 1 bar
14 Bühler Technologies GmbH
4.2.5 Connecting the heat exchanger
The picture on the left shows the schematics for connecting
(two) separate heat exchangers.
To minimise gas wash out in the cooler, the two (identical)
heat exchangers must be operated in series (right picture).
This should be done as follows:
1. Gas inlet line to red gas inlet on heat exchanger 2 (pre-
cooling).
2. Connection between gas outlet on heat exchanger 2 and
the red gas inlet on heat exchanger 1 (after-cooling).
3. Attaching the final gas output line to the gas outlet on
heat exchanger 1.
Gas cooler
(two single heat exchangers)
Heat exchanger 1 Heat exchanger 2
gas in
gas out
gas out gas in
condensate out
condensate out
The gas inputs are marked in red.
On glass heat exchangers, the correct position of the seal is
important when connecting the gas lines (see image). The seal
consists of a silicone ring with a PTFE sleeve. The PTFE side
must face the glass thread.
Glass
PTFE
Pay attention to the appropriate spanner size when selecting
fittings for stainless steel heat exchangers.
PTS/PTS-I gas connections: SW 14 or 9/16"
PTS/PTS-I condensate out connections: SW 22
4.2.6 Condensate drain connection
Depending on the material, build a connecting line with fit-
tings and tubing or hose between the heat exchanger and
condensate drain. For stainless steel the condensate drain can
be suspended directly to the connecting tube, for hoses the
condensate drain must be secured separately using a clamp.
Gas cooler +
(two heat exchangers in series)
Heat exchanger 1 Heat exchanger 2
gas out gas out
gas in
gas in
condensate out
condensate out
BX450040 ◦ 07/2025