Engineering Specs

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h. For burner inputs of 225,000 Btuh (66 kWh) and 250,000 Btuh (73.26 kWh) a special
coupling system will be used for securing the connection of the combustion chamber tube
to the first & second heat exchangers tube as indicated in the Installation and Owners
Manual
C. Reflector Shield System:
1. General:
a. Reflector shields will be constructed of high grade steel with a heat and corrosion
resistant hot-bonded aluminum-silicon alloy coating.
b. The reflector system will enclose the emitting tube system on the top and two sides and
extend 1-5/8 “ (41mm) below the bottom surface of the tube system to entrap convection
heat around the tube system, thereby increasing overall tube temperature and infrared
heat emission
D. Tube/Reflector Suspension System:
1. General:
a. The tube/reflector system will have aluminized-steel sheet metal end caps at each end
of the system to act as hanging brackets that will support the system and minimize the
escape of entrapped convection heat
b. The tube/reflector system will have two wire hangers for each tube, except for the first
tube there is one wire hanger and an End-plate hanger. It allows free passage of
entrapped convection heat along the length of the system to promote more uniform heat
from end to end
c. The tube/reflector end caps and hangers will enable suspension of the system so that
the reflector shields can be oriented about the short axis of the system at a fixed angle
between 0° to 45° as indicated on the drawings
d. The entire tube/reflector system will be suspended from the structure as indicated in the
Installation and Owner’s Manual or as specified in the drawings and/or schedule
E. Burner:
1. General:
a. The burner will have a ECM brushless blower to create a positive pressure system
b. The Modulating Burner will have a Controller which will provide a PWM output to control
the blower speed and a constant current up to 250mA to the modulating valve to vary the
manifold pressure
c. The blower speed and the manifold pressure of the modulating valve will vary
continuously responding to the 2 to 10VDC from a modulating thermostat
d. The Controller will have on-board 10VDC available to manually vary the input using a
potentiometer
e. The parameters of the Controller on the Modulating Burner will be factory set for NG and
LP fuel for required input BTUH
f. The fuel conversion in the field will be done by changing the main orifice and plugging a
jumper on the Controller as described on the fuel conversion instructions
g. The blower will provide combustion air flow directly to the burner assembly so that
electronic burner components are isolated from the air flow
h. The blower will be fitted with a 4 inch (100 mm) diameter collar in case site conditions
warrant connection of outside combustion air
i. The burner will operate on either natural gas or propane gas
j. The burner will utilize a burner cup with primary air control and creates a very long, laminar
and axially straight flame.
k. The combustion Chamber is 4” (100 mm) diameter with Access Cover to easily access
burner -cup and the orifice
l. The burner will be housed in a pre-painted sheet metal protective cabinet
m. The burner cabinet will be of a ‘clam-shell’ design that opens downward on a hinge to
provide service access to all burner components
n. The burner will operate with the housing cabinet in the ‘open’ service position