Beckett SQM40 - Manual

1
Professional Installation and Service Required
Incorrect installation and mishandling of startup could lead to equipment malfunction
and result in asphyxiation, explosion, or fire.
y This Gas Burner Supplement shall be used in conjunction with the Beckett 6104 BCG50 Installation Manual.
y This burner shall only be installed and prepared for startup by a qualified service technician who is trained and
experienced in commercial gas burner system installation and operation.
y Carefully follow the wiring diagrams, control instruction sheets, flame safeguard sequence of operation, test procedures
and all appliance manufacturer’s directions that pertain to this installation.
y Perform all wiring in accordance with the National Electric Code ANSI/NFPA 70, Canada CSA C22.1 and all authorities
having jurisdiction.
y If any of these items are not clear or are unavailable, call Beckett at 1-800-645-2876 for assistance.
Gas Burner Manual Supplement
CG15 / CG25 / CG50 Optional Modulation Control Systems
COMMERCIAL PRODUCTS
I. Introduction
The CG15, CG25, and CG50 gas burners are available
in three optional configurations that can be controlled
by the three most popular modulation control signals:
135 Ohm, 4 – 20 mA, or 2 – 10 VDC. All three of these
options use the Siemens SQM40 actuator for damper
control. The SQM40 accepts any of those signals, so the
difference between burners using any of those control
signals is internal wiring of the burner, the control signal
connections you make, and trim adjustments. When
operating with any of these signals, the burner’s firing
rate responds in a direct proportional control manner,
making them well suited for use with lead/lag or building
automation system controls. The standard burner
configuration for these modulation systems is with the
junction box (shown in Figure 1 ), but a panel enclosure
is optionally available.
Operator controls are the
same for all 3 signal types.
Siemens SQM40 actuator
Figure 1