Carrier WEATHERMASTER 50HJQ004-016 Product Data page 168

Application data (cont)
Carrier PremierLink™ controls
The Carrier PremierLink controls can be used with any
thermostat.
Field-supplied fan drives
If the factory drive sets must be changed to obtain other
wheel speeds, consult the nearest Browning Manufacturing
Co. sales office with the required new wheel speed and the
data from Physical Data tables (center distances, motor and
fan shaft diameters, motor horsepower) for a modified
drive set selection. For minor speed changes, the fan
sheave size should be changed. (Do not reduce the size of
the motor sheave; this will result in reduced belt horse-
power ratings and reduced belt life.)
Condenser coil protection
Pre-coated aluminum-fin coils have a durable epoxy-
phenolic coating applied to the fin prior to the fin stamping
process to provide protection in mildly corrosive coastal
environments. Pre-coated coils have an inert barrier
between the aluminum fin and copper tube. This barrier
electrically disconnects the dissimilar metals to minimize
the potential for galvanic corrosion. This economical
option provides substantial corrosion protection beyond
the standard uncoated coil construction.
CONCENTRIC DUCT DISTRIBUTION —
50HJQ014,016
NOTE:
1. Do not drill in this area, damage to basepan may result in
water leak.
2. A 90-degree elbow must be provided in the supply ductwork
to comply with UL (Underwriters' Laboratories) codes for use
with electric heat.
168
Copper-fin coils provide increased corrosion resistance
in moderate coastal environments where industrial air pol-
lution is not present. All copper coils eliminate bi-metallic
construction to eliminate the potential for galvanic corro-
sion. Application in industrial environments is not recom-
mended due to potential attack from sulfur, sulfur oxide,
nitrogen oxides, carbon and several other industrial air-
borne contaminants. In moderate seacoast environments,
copper-fin coils have extended life compared to standard
or pre-coated aluminum-fin coils.
E-Coated aluminum-fin coils undergo a precisely con-
trolled scientific process that bonds an impermeable epoxy
coating to the specially prepared fin coil surface. E-Coating
produces a smooth, consistent coating that is less brittle,
more resilient and more durable than previous postcoating
processes. E-Coated aluminum-fin coils offer economical
protection and improved coil life in many contaminated
environments.
E-Coated copper-fin coils provide maximum protection
in virtually all environments, this option combines the con-
tinuous, impenetrable barrier of the E-Coating process
with the natural resistance of an all-copper construction.
E-Coated copper-fin coil assemblies ensure long life, even
in environments that combine harsh coastal conditions
with industrial contamination.
CONCENTRIC DUCT DETAILS —
1'-10 11/16''
MAX.
1'-0 3/16''
4'-6 13/16''
1'-7 15/16''
1'-0 3/16''
24'' MIN.
Shaded area indicates block-off panels.
NOTE: Dimensions A, A' and B, B' are obtained from field-supplied
ceiling diffuser.
Concentric ducts may only be installed on units without electric
heat. Personal injury or unit damage may result.
905
50HJQ014,016
6'-2 3/8'' MAX.
5'-9 3/16'' MAX.
B
B
A
BAFFLE
5 3/16''
A