Catalogue

62 CAB-PRC001-EN
Mechanical Specifications
of rated voltage and operating at 90 percent of rated voltage on all speed settings. Motors can
operate up to 10 percent over voltage.
Controls
Controls options are: fan speed switch, control interface, and Tracer UC400, ZN010, ZN510, and
ZN520. A variety of inputs and outputs are available for the control interface and Tracer controller
options. A disconnect switch (for non-electric heat units), fused transformer, contactor(s), and
terminal strip are provided with the control interface and Tracer controller options. For specifics on
the Tracer UC400, ZN010, ZN510, and ZN520, please refer to “Controls,” p. 29.
Control Interface
The control interface is intended to be used with a field-supplied, low-voltage thermostat or
controller. The control box contains a relay board which includes a line voltage to 24-volt
transformer, quiet contactors (for electric heat units), and an optional disconnect switch. All end
devices are wired to a low-voltage terminal block and are run-tested, so the only a power
connection and thermostat connection is needed to commission the unit. Changeover sensors and
controls are provided whenever a change-over coil is selected. When NO valves are selected,
inverting relays are provided for use with standard thermostats.
Fan Speed Switch
The fan speed switch is available with or without the control interface option and is available as
wall-mount or unit-mount. Both the wall-mount and unit-mount FSS will employ low-voltage fan
switches. However, the low-voltage fan speed option will provide an interface to factory wiring,
including variable-speed/high-medium-low (HML) control. The control box contains a line voltage
to 24-volt transformer, ECM motor controller, and an optional disconnect switch.
Hot Water Coils
Hot water coils are proof tested at 350 psig (air under water) and leak tested at 125 psig (air under
water). Additionally a pressure decay test is conducted at 120 psig.
Maximum main coil working pressure is 300 psig. Maximum entering water temperature is 200°F.
Tubes and u-bends are 3/8”OD copper. Fins are aluminum and are mechanically bonded to the
copper tubes. Coil stubouts are 5/8”OD copper tubing.
Steam Coils
The steam heating coil is a one-row, tube-in-tube distributing type coil. Coil construction is
aluminum fins mechanically bonded with 1”OD copper tubing. Steam coils are (air) burst tested
at 250 psig. Maximum steam coil working pressure is 100 psig. Maximum entering steam
temperature is 325°F. Tubes and u-bends are 5/8” OD copper. Fins are aluminum, 9 fpi, and are
mechanically bonded to the copper tubes. Coil stubouts are 1” OD copper tubing. Piping is field-
supplied.
Piping Packages (Hot Water Coils Only)
All piping packages are proof-tested at 350 psig (air under water) and leak-tested at 125 psig (air
under water). The maximum working pressure of the interconnecting piping is 300 psig.
Piping packages are available in either basic or deluxe configurations. The deluxe package includes
unions at the coil connections and a 20 mesh strainer on the supply side with a pressure rating on
the strainer of up to 400 psig. The basic package does not include either unions or the strainer.
End valve options available on both the basic and deluxe piping packages include ball valves,
manual circuit setters, and auto circuit setters.
Ball Valve Supply and Return
A ball-type stop valve is on the piping supply and return. The ball valve is a shutoff valve only with
a maximum working pressure of 400 psig.
CAB-PRC001-EN.book Page 62 Tuesday, May 8, 2012 10:11 AM