Submittal Sheet

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.
Each unit shall be equipped for use with 115/1 volt power supply. (Stepdown transformers shall be available to
be eld installed for use with (208) (230) (460) volt power supply.)
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 cabinet shall be constructed so that screws are not visible
from the bottom, front, or sides, except for service panel and accessories. Unit construction shall incorporate a
beveled front corner on control side for additional cabinet rigidity. All units shall be manufactured with a tooled
drawn supply air orice on the rear panel to reduce fan inlet noise.
The unit shall be designed for ceiling suspension featuring 3/8”-16 female threads (hanger kits for 1” pipe)
at both 2-point and 4-point locations with no additional adapter kits. (Hanger kit for ceiling mounting shall be
available for Sizes 30-125.)
The cabinet shall be equipped with RAL 3005 burgundy painted, roll-formed horizontal louvers. Louvers shall
be spring held and adjustable for directing airow. (Vertical louvers) (downturn nozzles) (downturn nozzles with
vertical louvers) shall be available.
The cabinet shall be equipped with a full safety fan guard with no more than ½ inch grill spacing on Sizes 30-
125 or no more than 1 inch on Sizes 150-400. The (open dripproof) (enclosed) motor and fan assembly shall
be resiliently mounted to the cabinet to reduce vibration and noise.
The unit shall be designed with a full opening service access panel complete with screw closure attachment
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 1” for Sizes 30-125 and 4” for Sizes 150-400. Minimum
bottom clearance from combustibles shall be 1” for all sizes. Minimum clearance from combustibles on non-
service side shall be 1” for Sizes 30-125 and 2” for Sizes 150-400.
Unit(s) shall be design certied by the Canadian Standards Association to ANSI Z83.8b and CSA 2.6b for com-
mercial/industrial installation.
(Model sizes 30, 45, 60, 75, 100 and 125 MBH shall be certied to CSA International Requirement 10-96 - U.S.,
CR96-0005 - Canada for use in attached residential garage.
Manufacturer must have a minimum of 50 years experience in the manufacture of gas red unit heaters.
Electrical
Cabinet
Certications
SampleSpecications
Model UDBP
SampleSpecications
ModelUDAP(cont'd)
Provide (82%, 83%) high-efciency, power vented, gas-red unit heaters manufactured as Reznor
®
brand
units designed for use in building areas where higher reliability is required and venting is either vertical or
horizontal.
Each of the 14 sizes in the Model UDBP series shall be equipped for use with (natural) (propane) gas. Gas
connection shall be external to the cabinet.
The heater shall be equipped with a multi-cell, 4 pass serpentine style steel heat exchanger. Heat exchanger
tubes shall be press fabricated of (titanium stabilized, corrosion resistant aluminized steel) (409 stainless steel)
(316 stainless steel). All heat exchangers shall be fabricated with no welding or brazing, only tool pressed
mechanical joints. All heat exchanger cells shall be designed with an aerodynamic cross section to provide
maximum airow.
The units shall incorporate a single, one piece burner assembly with a single orice. The burner shall have a
continuous wound close pressed stainless steel ribbon separating the ame from the burner interior. All units
shall have a single venturi tube and orice supplying fuel to a one-piece burner housing. Each heat exchanger
cell shall use balanced draft induction to maintain optimum ame control.
Controls shall include a (single-stage) (two-stage) gas valve; direct spark multi-try ignition with electronic ame
supervision with timed lockout integrally controlled via a printed circuit control board. The control board shall
also incorporate diagnostic lights, DIP switches for blower overrun settings, and a relay (denite purpose 3 pole
contactor) for blower only operation. All open (TEFC) blower motors shall have automatic thermal overload
protection or be equipped with a factory installed motor starter with adjustable thermal overloads. All units shall
be equipped with a safety limit switch.
All controls shall be enclosed in the sealed control compartment to protect them from accidental damage, dust,
and atmospheric corrosion.
GAS-FIRED, POwER VENTED
UNIT HEATERS
Fuel
HeatExchanger
Burner
Controls
Form RZ-C-UH (Version H) Page 50
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