Temptek CF Series - Page 79

CF Series Portable Chiller : Air & Water-Cooled : 5 - 40 Tons
Page: 79
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: service@Temptek.com
F. If your unit is equipped with an adjustable low pressure switch,
adjustthelowpressureswitchaccordingtothespecicationsinthe
chart on the next page.
Never lower the cut out setting on the adjustable low pressure
switch without adding glycol to the circulating system.
Evaporator damage will result and this damage is not covered
by the factory warranty.
G. Ifyourunitisequippedwithanon-adjustable“xed”pressureswitch
with a factory low limit of 48°F this switch must be replaced with a
switch with a lower limit. The lower range low pressure switch can
be obtained from the factory by calling 317-887-0729 and asking for
the service department. The model and serial number of your unit
isrequired.Aqualiedrefrigerationtechnicianisrequiredtochange
the switch though no gas recovery is required. The switch attaches
toathreadedttingontherefrigerationline.
H. ADJUSTING THE SETPOINT LOCK OUT JUMPER: The control instrument has a
setpoint lock out jumper. This jumper controls whether the user is allowed to reduce the
setpoint below 48°F or 9°C. If the jumper is in position 1 (farthest from the SPL label)
the user IS NOT ALLOWED to reduce the setpoint below 48°F or 9°C. If the jumper is
in position 2 (closest to the SPL label) the user is allowed to reduce the setpoint to 10°F
or-11°C.Tooperatebelow48°Fleavinguidtemperaturethejumperwillneedtobein
position 2. See the image below.
I. Once all safety provisions are made, the temperature control set point may now be
lowered to the desired operating temperature.
J. WARNING: do not use any type or brand of automotive antifreeze. Automotive antifreeze
contains corrosion inhibitors - silicates - designed for compatibility with the materials
in automotive engines. Unfortunately, silicates can gel and cause deposits to foul and
insulate heat exchanger surfaces. In your chilling system that can mean higher energy
costs, high pumping costs, and possibly even shut downs for system cleaning. We
recommend the use of DowFrost or Monsanto DFS-1.
Adjustable low
pressure switch
Fixed low
pressure switch
Setpoint Lock Out Jumper