Heat Wise SU-3, Руководство пользователя

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• Fuel: The SU-3 and SU-4 Burners will fire natural gas or LP. The maximum inlet pressure at
test port is 10” W.C. for both natural and LP gas.
• Length of Flame Tube: 5 ¼” or 14” (special order)
•
Firing System:
The burner operates as ON – OFF with a fixed air inlet shutter and proportional
head setting. (See the charts for approximate firing rates. In the field they may vary)
•
Blower Motor:
120 Volt/ 60 Hz/1 Ph, 1/6 HP PSC motor
• Burner Ignition : A separate external high voltage ignition transformer provides interrupted
ignition with 4 second safety timing to establish the flame.
• Air Flow Safety Switch : Diaphragm switch closes when the burner blower develops adequate air
pressure. Loss of air pressure causes the fuel valves to close immediately.
• Pre-Purge : Minimum 30 seconds is standard on burners.
• Gas Train : Below 400,000 BTU low and high gas pressure switches are optional. Above 400,000
BTU they are standard with gas leak shut off valve. (See the setting pressures from the table
given) Dual gas valves in the form of a combination valve or separate with built in pressure
regulator or separate with shut off valves are all part of the factory-assembled system. When
pressure switches are used, the power (120V) passes through each as a part of the limits; they will
trip power to the burner as soon as pressure increases or decreases to the system. See the pictures
below for common configurations of SU-3 and SU-4 gas trains.
The same gas valve is used for
both natural gas and propane without any conversion kit.
Picture 1: U.L. 795
gas pressure switches
Gas Leak Test Cock Picture 2: Below 400 MBH Gas Manifold
Picture 3: Dual Gas Valve – Canadian applications only
Warning: Should overheating occur, 1) shut off the manual gas shut off valve to control the
appliance; 2) DO NOT shut off the control switch to the blower
This power gas burner is designed to convert oil and/or coal fired boilers and furnaces to a gas-burning
appliance. The conversion must conform to local codes. In the absence of such codes, the American
National Standard Institute (ANSI) for the installation of gas conversion burners, Z21.8A-1990 and the
National Fuel Gas Code ANSI 223.1-1992 or current standards should be applied.
Two electrodes act as a sparker and a flame rod (See Fig. 1). Flame rectification by this flame
rod monitors the continued presence of the burner flame.