1
Section 1 – Warnings and Cautions
Please read and understand this section before operating the system!
1.1
Electrical Warning
The Mokon temperature control system, as with all high voltage electrical equipment, should be
connected according to all local and national codes. All installation, maintenance, service, repair,
adjustment, and operation should be done only by qualified trained electrical personnel who have
read and completely understood this instruction manual. To the upper right is a symbol for
ELECTRICAL DANGER. When it is seen on the following pages of this manual as well as on the
system, care should be taken to avoid possible electric shock. All maintenance and service should
be performed with the power isolated and locked out except where noted.
1.2
Hot Fluid Warning
Exercise EXTREME CAUTION while working on or in the area of the Mokon temperature control
system. The high temperature of the fluid will cause the process lines, the system components, and
the metal cabinetry to become VERY HOT and therefore should NOT be touched. To the upper
right is a symbol for SURFACE MAY BE HOT, HIGH TEMPERATURE. When it is seen on the
following pages of this manual, care should be taken to avoid possible burns. All maintenance and
service must be performed with the system completely cooled. It is advisable to plug the process
ports of any unused zones so that if a wrong button is pressed, fluid will not be pumped through
them.
1.3
Cold Weather Caution
If the Mokon temperature control system will be moved from your plant and will be subjected to
freezing temperatures, the water in the system must be completely drained and/or sufficient
antifreeze added to prevent serious water damage from freezing.
1.4
Excessive Supply Pressure Caution
Model: DN, DO, DP, DQ, DR, DT, DU, DV, DW, DX, DY, DZ, HN, HR,
HW, HX, HY, HZ, MT
Mokon suggests an optional pressure regulator on Mokon temperature control systems for
applications with high supply water pressure (exceeding 50 PSI, 345 kPa) to reduce or eliminate
the potential for water hammer. Recommended pressure is 30 PSI (207 kPa). Water hammer in the
Mokon temperature control system or the process and cooling lines can lead to system damage and
reduced system life. If a pressure regulator is added to the Mokon temperature control system, it
must be of the design that incorporates a bleed off for thermal expansion of the fluid.
