Submittal Sheet
Page ___________ of ______________
Form C-HU - Page 2
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MODEL WS
INDOOR, SUSPENDED, STEAM OR HOT WATER
HYDRONIC UNIT HEATER FOR VERTICAL OR HORIZONTAL CONFIGURATION
Reznor
®
Model WS Steam/Hot Water Suspended Heaters are design-engineered to be technically advanced
and esthetically pleasing which makes it the hydronic heater for the 21
st
century.
This smart new concept in commercial heating units will accommodate all architects who are looking for some-
thing new and different.
The heating range of Model WS is 13,000 to 350,000 BTUH. The air volume ranges from 270 to 4,750 CFM.
The heat exchanger is made of one or two rows of steel coils (standard or optional copper coils) with aluminum
ns, with approximately 10-1/2 ns per inch (4 ns per cm). The spacing between the ns makes cleaning and
maintenance of the heat exchanger easier, which is essential to keep the unit heater efcient.
The standard steel tubing is very strong and long lasting. Steel tubing is designed for hot water applications
up to 150 psi.
The copper tubing used for the heating coil is very thick (0.03”, 0.75 mm), making Reznor heating coils ex-
tremely sturdy and long lasting. The copper tube diameter is 0.867” (22 mm) O.D. The large tube diameter
reduces the water pressure drop, which means these units require lower pump pressure than other hydronic
heaters. It also allows a very rapid heat radiation. For steam heating applications copper tube (Option
HA12) is required. Designed for high working steam pressure up to 145 psi (10 bar), every heat exchanger is
subjected to a pressure test at over 350 psi (25 bar) before leaving the factory.
The heat exchanger assembly receives a special paint coating which makes the coil long lasting and increases
the thermal output.
The Fan/Motor Assembly is made up of three components: the fan, the motor and the fan guard, which also
acts as the main support for the fan. This fan guard is galvanized for protection against corrosion, and is mount-
ed onto the main casing with anti-vibration rubber mountings. The fan guard meets OSHA requirements.*
The standard 2-speed motor is a hermetically sealed motor which is maintenance free. The motor is wired for
115/1/60 supply voltage. The motor speed is eld adjustable to run at high or low RPMs. Refer to the Technical
Data Chart for fan RPM, heating output and CFM ranges.
The exibility of changing motor speeds allows the installer to adjust the unit to high speed for increased BTUH
output, or low speed for reduced noise level. All motors have internal protection as a standard feature.
All Model WS units can be installed for either vertical or horizontal discharge.
The unit cabinet is manufactured from .032” (0.8mm) galvanized pre-painted steel nished in dove gray. Using
pre-painted steel helps protect the cabinet against oxidation.
The cabinet is held together by shake-proof screws and molded corner sections to add additional strength and
durability. Adjustable louvers are held in place by spring loaded pivots. Vertical louvers are available for eld
installation.
The optional Air Flow Induction Optimizer is available for horizontally discharged units. The Air Flow Induction
Optimizer increases the air ow due to the unique shape of its deecting louvers which improves the throw of
the heated air stream. See the optional accessories section for more information.
Units are packaged into strong corrugated cardboard cartons with strengthened upper and lower side sections.
These containers are clearly marked with the model number, size and approximate shipping weight.
Units are manufactured in an ISO 9001 registered facility.
STANDARD FEATURES
Heat exchanger composed of steel tubes and aluminum ns spaced approximately 10-1/2 ns per inch
Painted tubing heat exchanger and aluminum ns
Hot water applications
Fan/Motor Assembly includes galvanized fan guard
Vertical or horizontal conguration
Cabinet and louvers constructed of galvanized pre-painted steel
Cabinet held together by shake-proof screws and molded corner sections
Spring mounted horizontal louvers
115/60 single phase, two speed motor (eld adjustable)
Manufactured in an ISO 9001 registered facility
FACTORY INSTALLED OPTIONS
Heat exchanger composed of 0.03” thick, .867” O.D copper tubes and aluminum ns spaced approximately
10-1/2 ns per inch
Up to 145 psi steam applications with copper tubing
FIELD INSTALLED OPTIONS
Vertical louvers for better air distribution - vertical or horizontal discharge
Air ow induction louvers increase air ow and throw - horizontal discharge
Light duty, or heavy duty thermostat
Thermostat guard cover
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DESCRIPTIONDESCRIPTION
STANDARD FEATURESSTANDARD FEATURES
OSHA requires that the fan guard spacing for a heater mounted 7 feet off the oor can not exceed 1/2 inch.