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7. Remove any debris from combustion air inlets and/or hoods. Note that some combustion air
8. For units with burners size 1250 and larger, ensure exhaust fan rotation is correct.
Figure 16. Control panel for the JR burner on 200-1000
mbh (3:1 & 10:1 turndown) units
Startup
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it may be necessary
to work with live electrical components. Have a qualified licensed electrician or other individual
who has been properly trained in handling live electrical components perform these tasks.
Failure to follow all electrical safety precautions when exposed to live electrical components
could result in death or serious injury.
1. Start the air-handling unit fan. The field-installed supply fan interlock and primary airflow switch
2. The high-temperature-limit switch contacts (HL1), the modulating gas valve actuator, and its
3. The building control system should call for heat, closing a contact between terminals four and
4. Open the manual gas valve outside the unit next to the gas pressure regulator and bleed air
CLCH-SVX08A-EN
inlets are located on the floor panel of the piping vestibule. Insure the openings are not blocked.
WARNING
contacts (AI1) should close.
end switch contacts (AES) should be closed.
five.
from the piping.
Figure 17. Control panel for the FDM burner on 1250-2400
(20:1 turndown) units
Operation
27
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