Brochure

The unit shall have a factory-installed power venter device to draw combustion air through an inlet in the rear
of the cabinet.
The combustion air/venting system shall include a vibration isolated power venter motor and wheel assembly
and a combustion air pressure switch.
(An approved vent cap shall be available.)
Operation shall be controlled by an integrated circuit board that includes LED diagnostic indicator lights. Supply
voltage connections are made at the circuit board. 24-volt control connections shall be made on an externally
mounted terminal strip with connections W1, W2, R, and G. All internal wiring, both line and control voltages,
shall be terminated by insulated terminal connectors to minimize shock hazard during service.
Units shall be equipped with a 115V power supply (Stepdown transformers shall be available to be eld in-
stalled for use with a (208) (230) (460) volt power supply.)
Size 30,000-125,000 BTUH units shall be equipped with a centrifugal blower with direct drive from an open
dripproof motor with internal overloads. Size 30,000 and 45,000 BTUH units must be able to handle .5” w.c. of
external static pressure. Size 60,000-125,000 BTUH units must be able to handle .75” w.c. of external static
pressure. (Size 30,000-125,000 BTUH units may be equipped with a blower inlet guard.)
Size 150,000-400,000 BTUH units shall be equipped with a centrifugal blower and adjustable belt drive and
an (open dripproof) (totally enclosed) blower motor with internal overloads. Size 150,000-400,000 BTUH units
must be able to overcome .5” w.c. of external static pressure. (Size 150,000-400,000 BTUH units may be
equipped with an OSHA-type belt guard and blower inlet guard.)
The cabinet shall be low prole with a pre-coat or powdercoat RAL 1001 white paint nish. Finish shall be a
minimum 80 gloss on G30 galvanized steel. The heat exchanger/control compartment cabinet shall be con-
structed so that screws are not visible from the bottom, front, or sides, except for service panel and accesso-
ries. Cabinet shall have a beveled front corner on the control side for additional cabinet rigidity.
The unit shall be designed for ceiling suspension featuring 3/8”-16 female threads (hanger kits for 1” pipe) at
4-point locations.
The cabinet shall be equipped with RAL 3005 burgundy painted, roll-formed horizontal louvers (duct ange).
Louvers shall be spring held and adjustable for directing airow. (Vertical louvers) (downturn nozzles) (down-
turn nozzles with vertical louvers) shall be available.
The unit shall be designed with a full opening service access panel complete with captive screw closure at-
tachment and lifting handle for removal. All components in the gas train, all standard electrical controls, and the
power venter shall be within the service compartment.
Minimum top clearance from combustibles shall be 6” (152mm) for Size 30,000-125,000 BTUH units and 14”
(356mm) for Size 150,000-400,000 BTUH units. Minimum bottom clearance from combustibles shall be 1”
(25mm) for all size units. Minimum clearance on access side shall be 18” (457mm) for all sizes. Minimum
clearance on non-accessside shall be 24” (610mm) for all sizes. Minimum rear clearance for all sizes is 18”
(457mm).
All sizes shall be design certied by the Canadian Standards Association to ANSI Z83.8 and CSA 2.6 for com-
mercial/industrial installation.
Manufacturer must have a minimum of 50 years experience in the manufacture of gas red unit heaters.
CombustionAirandVenting
Electrical
Blower
Cabinet
Certications
SampleSpecications
ModelUDBP(cont'd)
SampleSpecications
Model F
Provide gravity-vented, high-efciency, gas-red unit heaters manufactured as Reznor
®
brand units. Units are
designed to take combustion air from the indoor space and vent to the outdoors.
Model F - Gas-red, propeller fan, gravity-vented model
Each Model F series unit shall be equipped for use with (natural) (propane) gas and (120/1/60) (208/1/60)
(230/1/60) (220-240/1/50) volt power supply.
The heat exchanger shall be aluminized (E-3 stainless) (409 stainless) steel. Die-formed burners shall be of
aluminized steel and include ared ports and a stainless steel insert. The units shall be designed to provide
80% thermal efciency.
Controls include a 24-volt control transformer; single-stage (two-stage) gas control system; an intermittent
spark pilot with electronic ame supervision (intermittent spark pilot with electronic ame subversion and timed
lockout); fan and limit safety controls; an open, drip-proof (totally enclosed) fan motor with internal overloads;
and a blocked vent switch system.
The cabinet is equipped with a full safety fan guard and horizontal (vertical) louvers (downturn nozzles) for
directing airow. The unit is arranged for ceiling suspension with 2-point (4-point) threaded hanger connections
(hanger kits).
Model F unit heaters are design certied to ANSI and CAN/CGA Standards by the Canadian Standards As-
sociation for installation in the United States and Canada.
GAS-FIRED, POWER VENTED
UNIT HEATERS
Fuel
HeatExchanger
Controls
Cabinet
Certications
Form RZ-C-UH (Version H) Page 51
Page Number _______ of ______