North American 4988 Zephyr Burners Start-up Instructions
Supplement 4988-4
Figure 1. External Mounting of Zephyr Burner and integral blower simplifies installation. A typical installation includes items identified by letters on schematic drawing.
L – Relief Valve (if required) M – Automatic Safety Shutoff Valve #1 P – Gas Pressure Regulator Q – Burner Air Flow Switch R – Combustion Air Pressure Switch
A – 4988 Zephyr B – Flame Protection Tube C – Low Fire Adjusting Valve D – Low Fire Accessories E – Relief Valve (if required) F – Gas Control Valve and Actuator G – Metering Orifice H – Manual Shutoff J – Leak Test Valv e K – Automatic Safety Shutoff Valve #2
S – Low Gas Pressure Switch T – High Gas Pressure Switch U – Gas Strainer W – Pressure Gauge
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