Techne RB-22A - Manual (Page 17)

P A G E 15
R e f r i g e r a t e d B a t h s U S E R ’ S M A N U A L
Service
1 Complete servicing and repair of Techne products is available
at Techne see the contact information on pages 3 or 4.
2 A Service Manual is available and servicing may be undertaken by
any competent refrigeration engineer.
The following table gives a guide as to the gas charge for each
of the units:
Unit Refrigerant § Charge *
RB-5A R134a 85 gm
RB-12A R404a 250 gm
RB-22A R404a 250 gm
* There have been several improvements in design which
have varied the charge. To increase the cool-down rate
increase the charge slightly; to reach a lower temperature
reduce the charge slightly. Adjust the charge during testing.
§ Early units were charged with R12 or R502 please consult
Techne for advice on repair of older units. Units charged with
R404a or R134a have GN after the Serial Number,
eg 12345-13gn.