ThermoFlex-Manual.pdf - 第48页

Section 3 3-10 ThermoFlex Thermo Scientiﬁc W ater-cooled Chillers F or water -cooled chillers the facility w ater plumbing con nectio ns are also located on the rear and are labeled       OU…

Section 3

ThermoFlex 3-9

Thermo Scientiﬁc

Plumbing

Requirements

Ensure that all shipping plugs are removed before installation.

Never connect the process uid lines to your facility water supply or

any pressurized liquid source. 

To prevent damage to the chiller's plate exchanger, centrifugal pumps

require a 4.0 gpm (15.1 lpm) minimum ow rate.



P 1 and P 2 pumps are capable of producing 185 psig. Ensure your

plumbing is rated to withstand this pressure at your operating

temperature. An external pressure relief valve is available, see Section 5.



Note Ensure your plumbing installation develops a back pressure to the





 

labeled

(PROCESS OUTLET) and ().

Process Fluid Connections (FNPT)

Outlet

ThermoFlex900 - 10000 P 1 P 2 T 0 T 1 1/2" cast bronze

ThermoFlex3500 - 5000 P 3 P 4 3/4" cast bronze

ThermoFlex7500 - 24000 P 3 P 5 T 5 1" wrought copper

   

Supplied Adapters

P 1 P 2 T 0 T 1 1/2" x 3/8'' Polyethylene and 1/2" x 1/2" Nylon

P 3 P 4 3/4 MPT x 1/2 barb PVC

P 3 P 5 T 5 1" MPT x 1" Barb PVC and 1" MPT x 3/4" Barb PVC

CAUTION

1/4" Female NPT Riton Reservoir

Drain Plug

See Section 2 for the speciﬁc

locations on your chiller.

Figure 3-4 Typical Plumbing Connections (1 of 2)

DRAIN

Stainless steel outlet connection for chillers

with P 1/P 2 pumps and a ﬂow transducer

Section 3

3-10 ThermoFlex

Thermo Scientiﬁc

Water-cooled Chillers

For water-cooled chillers the facility water plumbing connections are also located

on the rear and are labeled

 

OUTLET. The connections are ½" Female NPT for ThermoFlex900 -

5000, ¾" Female NPT for ThermoFlex7500 - 24000. Both connections

for ThermoFlex900 to 10000 are cast bronze. The supply connections for

ThermoFlex15000 to 24000 are cast bronze, the return connections are stainless

steel.

Connect the

 to your facility water supply. Connect

the

 to your facility water return or drain. Ensure



 

tape is used, ensure the tape does not overhang the



Connect the

PROCESS OUTLET to



 

your application. Ensure all connections are

secure and that the proper sealant/lubricant

 

tape

is used, ensure the tape does not overhang the





and the instrument being cooled as short as

possible. Ensure tubing is straight and without

 

make them at the inlet and outlet of your

application, not at the ThermoFlex.

Figure 3-4 Typical Plumbing

Connections (2 of 2)

Process Fluid Flow

Application

Figure 3-5 Typical Plumbing Connections, Water-cooled Chillers

See Section 2 for the speciﬁc

locations on your chiller.

Section 3

ThermoFlex 3-11

Thermo Scientiﬁc

Process Fluid

Requirements

Do not use automotive antifreeze. Commercial antifreeze contains

silicates that can damage the pump seals. Use of any uid not

listed below will void the manufacturer’s warranty.



Approved uids are:

 Filtered/Single Distilled water

 0 - 75% Ethylene Glycol/Water

 0 - 75% Propylene Glycol/Water

 Deionized water (1 - 3 MΩ-cm, compensated)

Ethylene glycol (EG) is poisonous and ammable. Before using

any uid or performing maintenance where contact with the uid is

likely refer to the manufacturer’s most current MSDS for handling

precautions.



EG is also hygroscopic, it will absorb water from its environment.

This can affect the freezing point and boiling point of the uid over

time and may result in system failure.



To prevent freezing/glazing of the plate exchanger,

ThermoFlex7500 through 24000 chillers require the use of 50/50

EG/water or 50/50 PG/water below 10°C process temperature.



When using a process uid mixture of ethylene glycol and water or

propylene glycol and water, check the uid concentration and pH

on a regular basis. Changes in concentration and pH can impact

system performance.



When using EG/water or PG/water, top-off with plain water. After

top-off check the uid concentration.



Do not use a Deionization (DI) lter cartridge with Inhibited EG

or Inhibited PG. A DI lter will remove inhibitors from the solution

rendering the uid ineffective against corrosion protection. Also,

inhibitors increase uid conductivity.



WARNING

CAUTION