Maintenance
Procedures
(continued)
12
SPRAY
NOZZLE
SPRAY
NOZZLE
360° UMBRELLA TYPE SPRAY
Figure 7a – Nozzle Spray Distribution (Cooling Towers)
Figure 7b – Nozzle Spray Distribution (Coil Products)
CORROSION PROTECTION
Series V units are constructed entirely of corrosion-resis-
tant materials. The wet deck surface and the eliminators
of the VT1, VTO and VTL are made of polyvinyl chloride
(PVC) which requires no protection against rot, decay,
rust, or biological attack. The standard coil of the VF1,
VFL, VC1, VC2, and VCL is constructed of all prime sur-
face steel, hot-dip galvanized after fabrication. The bal-
ance of the construction in all units is either heavy-gauge
galvanized steel, the optional BALTIBOND® Corrosion
Protection System, or Type 304 stainless steel.
Galvanized Steel Construction
The standard Series V and Low Profile Series V units are
constructed of hot-dip galvanized steel. These units
should be inspected annually.
Cold Weather
Operation
Inspect the inside of the unit for blemishes or corrosion on
the galvanized steel. Affected areas should be thoroughly
wire brushed and recoated with zinc-rich compound (ZRC).
BALTIBOND
®
Corrosion Protection System
The Series V and Low Profile Series V units can be con-
structed of hot-dip galvanized steel, protected with the
BALTIBOND® Corrosion Protection System as an option.
Scratches and scrapes on parts which do not require
extraordinary corrosion protection can be touched up with
a repair kit (B.A.C. Part No. 16-133P). In the unlikely
event that the damage is more extensive than simple
scratches or dents, contact your local B.A.C. Representative.
Series V and Low Profile Series V equipment can be oper-
ated in subfreezing ambient conditions provided proper
measures are taken:
1. Protection against basin water freezing when the unit
is idle.
2. Capacity control to prevent ice formation in heat trans-
fer sections during operation.
3. Protection against coil freezing (VF1 and VFL Closed
Circuit Cooling Towers and cooling circuits in VC1,
VC2, and VCL Evaporative Condensers.
Cold weather applications should be reviewed with the
B.A.C. Representative in your area to ensure that the unit
selection, location, control, and accessories are adequate
for reliable operation. Listed below are general guidelines,
which should be followed to minimize the possibility of
freeze-up.
PROTECTION AGAINST BASIN WATER FREEZING
When the unit is shut-down and exposed to subfreez-
ing ambient temperatures, the basin water may freeze.
A remote sump located in a heated indoor area is a desir-
able method of freeze protection. Alternatively, basin
heaters, electrical immersion heaters, steam coil, or hot
water coil) can be used to maintain the basin water at a
minimum temperature of 40°F. In addition to protect the
cold water basin, all exposed water piping including
pump piping below the overflow level and makeup
water lines should be traced with electrical heater tape
and insulated.
