Alarms and Troubleshooting
52 RRU-SVX01F-EN
present, the CLP has not tripped. If no voltage is
present, CLP has tripped.
System Failure
Measure the voltage between terminals J6-9 and J6-6.
• Normal Operation = approximately 32 Vdc
• System Failure = less than 1 Vdc, approximately
0.75 Vdc
Cool Failure
Measure the voltage between terminals J6-8 and J6-6.
• Cool Operating = approximately 32 Vdc
• Cool Off = less than 1 Vdc, approximately 0.75 Vdc
• Cooling Failure = voltage alternates between 32 Vdc
and 0.75 Vdc
Airflow Troubleshooting
Gas Ignition Controls
Direct-Fired Unit Flame Relays 400 MBh
Table 13. Airflow troubleshooting
(a)
(a) Design Burner Air Pressure Drop across burner profile opening is
0.625 in; refer to Table 6, p. 36. Air pressure drop may be read at ROD.
Airflow
Profile Opening Width (in.)
6-in. Burner 12-in. Burner 18-in. Burner
1250 10
1500 11-1/4
1750 12-1/2
2000 13-3/4
2250 14-3/4
2500 16 14
2750 17-1/4 15
3000 18-1/2 15-3/4 14-1/4
3250 19-3/4 16-3/4 15
3500 21 17-1/2 15-1/2
3750 22 18-1/4 16-1/4
4000 23-1/4 19-1/4 17
4250 24-1/2 20 17-1/2
4500 25-3/4 21 18-1/4
4750 27 21-3/4 18-3/4
5000 22-1/2 19-1/2
5250 23-1/2 20-1/4
5500 24-1/4 20-3/4
5750 25 21-1/2
6000 26 22
6250 26-3/4 22-3/4
6500 27-3/4 23-1/2
6750 28-1/2 24
7000 29-1/4 24-3/4
7250 30-1/4 25-1/4
7500 31 26
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized. When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
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