9
Only install the Surna Chiller equipment on a at,
level surface. Acceptable surfaces include con-
crete slabs, A/C pads, or pressure treated wood.
Before attempting installation, be sure to verify
that the mounting surface exhibits suitable load
bearing capacity. Please consult the
specication section of this document for the
weight information for each chiller model. The
unit shall be placed on a hard surface that
extends a minimum of 6 inches from all sides of
the chiller housing. This is to prevent dirt and
debris from entering the condenser, which will
affect cooling efciency. DO NOT place the unit
directly on the ground. Damage caused by
debris striking the condenser is not covered
under warranty. Roof mounting is acceptable
so long as the roof joists are rated to support the
chillers weight load. Consult your local building
codes and guidelines before attempting roof
mounting.
Following installation, verify that there is a
minimum of 24 inches of clearance from
obstruction on all sides and no obstructions
above the unit to ensure proper airow over the
condenser.
Contact an electrician if you are not familiar
with the local codes and standards in your
jurisdiction. Before attempting electrical
installation, be sure to verify that
appropriately sized circuit breakers are in
place to handle the electrical load of your
chiller. The ampacity is provided for each
chiller unit in the Specications section of this
document along with recommendations for
sizing your circuit breaker. The cross-sectional
wire sizing to be used for the power
connections is a product of the chiller unit’s
ampacity and the length of wire needed.
Consult an electrician for more information
on power wire sizing and connection.
Installation Instructions
Location
Electrical
IMPORTANT: You must use a mixture of Propylene
Glycol and water in your reservoir. Your
reservoir should contain 30% Propylene Glycol
to 70% water (minimum), and contain up to 50%
Propylene Glycol to 50% water (maximum). We
recommend a 50%/50% mixture for optimum
cooling efciency. A 50%/50% mixture is
necessary when outdoor temperatures fall below
20°F (-7°C). Failure to use an appropriate amount
of Propylene Glycol may result in degradation
of system performance and/or damage to the
chiller unit which is not covered under warranty.
DO NOT use standard car antifreeze in the Surna
Chiller System (Ethylene Glycol).
Reservoir size is dependent on the type and
amount of equipment being cooled. If your
chiller is properly sized, a reservoir size of greater
than 50 gallons per 10 Tons of cooling is rarely
necessary, although larger reservoirs will result in
longer cycle times.
Depending on the size of your unit, the
plumbing connections will come in either 1” or
3/4” connections. Refer to the Specications
section in this document for information on your
chiller’s plumbing inlet/outlet connections. It is
our recommendation that you use tubing that
is sized 1/4” larger than the provided plumbing
connections on your specic chiller unit (use
an appropriate adapter for connection to the
chiller). This is to ensure maximum water ow
without restriction.
Be sure to install the water connections to the
appropriately labeled “WATER IN” and “WATER
OUT” ports on the chiller unit. This equipment will
not function if these connections are reversed.
Plumbing
