3
1.0
GENERAL DESCRIPTION
The Glycol Make-up unit is designed to automatically
maintain minimum pressure in closed-loop systems.
The GMU-30 uses 1/2 HP pump for systems requir-
ing up to 30-psi. The GMU-60 uses 3/4 HP pump and
for systems requiring up to 60-psi.
Depending upon the system pressure required, a
GMU-30 or GMU-60 is used. In both units, a pres-
sure switch starts and stops the pump(s).
1.1
PURPOSE OF MANUAL
This manual is furnished to acquaint you with some
of the practical ways to install, operate, and maintain
this unit. Read it completely before doing any work
on your unit and keep it handy for future reference.
Equipment cannot operate well without proper care.
To keep this unit at top efficiency, follow the recom-
mended installation and servicing procedure outlined
in this manual.
1.2
SAFETY INSTRUCTION
This safely alert symbol will be used in this manual
and on the unit safety instruction to draw attention to
safety related instructions. When used the safety alert
symbol means ATTENTION BECOME ALERT!
YOUR SAFETY IS INVOLVED! FAILURE TO FOL-
LOW THIS INSTRUCTION MAY RESULT IN A
SAFETY HAZARD.
ADDITIONAL SAFETY REQUIREMENTS
Always use accurate test meters when checking elec-
trical components. Always work with another person
in case of emergency.
1.3
STORAGE
For long periods of storage, the unit should be cov-
ered to prevent corrosion and contamination from
dirt. It should be STORED in a clean, dry location
between 0 and 170°F. The relative humidity should
not exceed 85%. The unit should be checked period-
ically to ensure that no condensation has formed.
After storage, again check that it is dry before apply-
ing power.
1.4
HANDLING
Care should be taken to prevent damage due to
dropping or jolting when moving the Glycol Make-up
Unit. Transportation damage should be brought to
the carrier's attention immediately upon receipt.
1.5
TEMPERATURE AND VENTILATION
All electrical equipment is susceptible to failure if
operated in ambient temperatures outside of its rat-
ing. The OPERATING temperature range for this unit
is 32 to 105°F. The relative humidity should not
exceed 95% non-condensing. The unit should not be
operated outside these extremes.
1.6
ELECTRICAL CONNECTIONS - A.C. POWER &
SIGNALS INPUT VOLTAGE
The input voltage tolerance is +10/-10% of name-
plate voltage.
1.7
GROUND CONNECTIONS
A grounding terminal is provided for a dedicated
ground wire connection. All provisions of the National
Electrical Code and local codes must be followed.
1.8
POWER WIRING
Power wire types and sizes must be selected based
upon conformance with the National Electrical Code
and all local codes and restrictions. In addition, only
copper (Cu) wire rated for at least 75°C may be used
for the power connections. Refer to the input current
as listed on the motor nameplate when sizing wire.
Connect the input power to the screw terminals on
the Power Distribution Block labeled "L1" & "L2".
Connect a ground conductor to the ground terminal
attached to the Power Distribution Block. See wiring
diagram 1GMU01 on page 9.
1.9
FIELD CONNECTION DIAGRAMS
The following field connection diagrams should be
reviewed prior to unit installation and operation.
Drawing #
Description
Page
1FC008
Typical Field piping
8
1GMU01
Wiring Diagram
9
Section 1
WARNING: Electrical shock hazard. Inspect all
electrical connections prior to powering the unit.
Wiring connections must be made by a qualified electrician
in accordance with all applicable codes, ordinances, and
good practice. FAILURE TO FOLLOW THESE INSTRUC-
TIONS COULD RESULT IN SERIOUS PERSONAL
INJURY, DEATH, AND/OR PROPERTY DAMAGE.
WARNING: Prevent electrical shocks. Disconnect
the power supply before beginning installation. FAIL-
URE TO FOLLOW THESE INSTRUCTIONS COULD
RESULT IN SERIOUS PERSONAL INJURY, DEATH,
AND/OR PROPERTY DAMAGE.
WARNING: Conduit grounds are not adequate. A
separate ground wire must be attached to the ground
lug provided in the enclosure to avoid potential safety haz-
ards. FAILURE TO FOLLOW THESE INSTRUCTIONS
CAN RESULT IN SERIOUS PERSONAL INJURY, DEATH,
AND/OR PROPERTY DAMAGE.
