Railway Equipment 934 User manual

P/N R9340-0104 1 © 2010 RAILWAY EQUIPMENT CO.
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5/11
OPERATING MANUAL
MODEL NO. 934
ELECTRIC HOT AIR BLOWER
TRACK SWITCH SNOW MELTER
480 / 230 VAC 1 & 3 PHASE
50KW AND 60 KW LOAD CAPACITY
MANUFACTURED
BY
RAILWAY EQUIPMENT COMPANY
15400 MEDINA ROAD
PLYMOUTH, MINNESOTA 55447
TEL. [phone]
FAX. [phone]
E-Mail:
Support: [email protected]
Sales: [email protected]

P/N R9340-0104 2 © 2010 RAILWAY EQUIPMENT CO.
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CAUTION
GENERAL HAZARD WARNING
FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS
PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH, SERIOUS INJURY
AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE,
EXPLOSION, BURN, ASPHYXIATION, CARBON MONOXIDE POISONING,
AND/OR ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THESE
INSTRUCTIONS SHOULD USE OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION, SUCH AS
INSTRUCTION MANUALS, LABELS, ETC., CONTACT THE
MANUFACTURER.
CAUTION
WARNING: FIRE, BURN, INHALATION, AND EXPLOSION HAZARD.
KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS, PAPER OR
CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS
RECOMMENDED BY THE INSTRUCTIONS. NEVER USE THE HEATER IN
SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE
COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT
THINNER, DUST PARTICLES OR UNKNOWN CHEMICALS.

P/N R9340-0104 3 © 2010 RAILWAY EQUIPMENT CO.
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PLEASE READ THIS INSTRUCTION MANUAL ENTIRELY BEFORE
HANDLING THIS MATERIAL OR ATTEMPTING TO INSTALL, OPERATE
OR SERVICE THIS HOT AIR BLOWER SYSTEM.
PLEASE READ THE WARNINGS AND CAUTIONS LISTED BELOW.
CAUTION
CAUTION
CAUTION
CAUTION
TWO (2) COMPLETE INSTRUCTION MANUALS HAVE BEEN INCLUDED WITH THIS
SNOW MELTER SYSTEM. PLEASE KEEP ONE OF THE MANUALS WITH THE SYSTEM
AFTER INSTALLATION. ANYONE OPERATING OR SERVICING THIS SNOW MELTER
SYSTEM SHOULD READ THE MANUAL ENTIRELY BEFORE PROCEEDING.
IF YOU HAVE ANY QUESTIONS CONCERNING THE MANUFACTURE, DESIGN,
FUNCTION, INSTALLATION, OPERATION OR MAINTENANCE, CONTACT
RAILWAY EQUIPMENT COMPANY BEFORE PROCEEDING.
SHEET METAL EDGES MAY BE VERY SHARP AND CAN
CAUSE SEVERE CUTS OR LACERATIONS. PROTECTIVE
GLOVES AND CLOTHING SHOULD BE WORN. USE
CAUTION WHEN HANDLING ALL SHEET METAL
COMPONENTS.
THIS HOT AIR BLOWER TRACK SWITCH SNOW MELTER
SYSTEM CAN BE OPERATED REMOTELY OR BY A SNOW
DETECTOR SYSTEM. THEREFORE, OPERATION MAY
BEGIN UNEXPECTEDLY. USE CAUTION WHEN IN THE
AREA.
SYSTEM OPERATES WITH VARIOUS VOLTAGE LEVELS
UP TO 600VAC. CONTACT WITH ELECTRICITY CAN BE
HAZARDOUS OR LETHAL. MAKE SURE THAT THE MAIN
CIRCUIT BREAKER IS TURNED OFF BEFORE
ATTEMPTING TO SERVICE THIS SYSTEM. EVEN WITH
CIRCUIT BREAKER OFF LINE VOLTAGE IS PRESENT AT
THE TOP CIRCUIT BREAKER CONNECTIONS.
THIS SYSTEM CONTAINS A HIGH SPEED AIR FAN
WHICH ROTATES AT UP TO 3600RPM AND CREATES
FORCEFUL SUCTION WHEN OPERATING. DO NOT
OPERATE THE BLOWER SYSTEM IF ANY OF THE
DUCTWORK COMPONENTS HAVE BEEN REMOVED.

P/N R9340-0104 4 © 2010 RAILWAY EQUIPMENT CO.
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TABLE OF CONTENTS
I. GENERAL INFORMATION 6
A. MODEL NUMBER DESCRIPTION 6
B. STANDARD FEATURES 7
II. COMPONENT DESCRIPTION 8
A. MAIN HAB UNIT 8
B. STANDARD DUCTWORK 8
C. OPTIONAL DUCTWORK 9
III. INSTALLATION 12
A.TIEDUCT 12
B.MAINHABUNIT 13
C. POINT NOZZLES AND TRACK DUCTS 14
F. ELECTRICAL CONNECTION 17
IV. CONTROL MODULE 18
A.DESCRIPTION 18
B. MODULE CONTROLS AND INDICATORS 18
C. FAULT CONDITIONS 20
D. ADVANCED FEATURES 23
E. OPERATION 27
V. SEASONAL MAINTENANCE 28
VII. TROUBLESHOOTING 29
A. UNIT DOES NOT START 29
B. LOW HEAT LEVEL 29
C.LOWAIRFLOW 29
VIII. SNOW DETECTOR 30
A.INSTALLATION 30
B.OPERATION 31
C.MAINTENANCE 31
D. TROUBLESHOOTING 32
IX.SPECIFICATIONS 33
X.DRAWINGS 34
XI. LIMITED WARRANTY 35

P/N R9340-0104 5 © 2010 RAILWAY EQUIPMENT CO.
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I. GENERAL INFORMATION
A. MODEL NUMBER DESCRIPTION
OPTIONS
0= STANDARD
1= GE IN TIE SWITCH
2= GE SNF IN TIE SWITCH
3= TRACK DUCT NOZZLES FOR SNF DUCT
4= 3/5 PANEL CONFIGURED
10X10 ADAPTOR FLANGE
AND NOZZLE (NO TIE DUCT)
5= 2HP PANEL CONFIGURED
10X10 ADAPTOR FLANGE
AND NOZZLES (NO TIE DUCT)
6= 2HP USING 10X10 TIE DUCT
7= STANDARD WITH FLEX NOZZLES
XXX X X X X
OUTLET DUCT
K= STEEL TIE DUCT WITH 115# PLATES 9'
N = STEEL TIE DUCT WITH 136# PLATES 9'
G= STEEL TIE DUCT WITH 115# PLATES FOR SNF
H= STEEL TIE DUCT WITH 136# PLATES FOR SNF
T= NO TIE DUCT
C- CUSTOM TIE DUCT
2.13.09 TM
MODEL
934 2HP High Profile
937 2HP Low Profile
INCOMING
POWER
1= 230VAC 1PH
2= 460VAC 1PH
3= 230VAC 3PH
4= 460VAC 3PH
5= 575VAC 3PH POWER
50 = 50 KW
60 = 60 KW
X
TRACK DUCT LENGTH
0 = NO TRACK DUCT
1= 10' TRACK DUCT
2= 20' TRACK DUCT
3= 30' TRACK DUCT
4= 40' TRACK DUCT
5= 15' TRACK DUCT
X
REVISION
LEVEL
Electric Hot Air Blowers

P/N R9340-0104 6 © 2010 RAILWAY EQUIPMENT CO.
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B. STANDARD FEATURES OF TRACK SWITCH HOT AIR BLOWER
1. Direct drive motor, totally enclosed fan cooled.
2. High efficiency, quiet operation blower.
3. Voltage sensor to prevent low or high voltage damage.
4. Current coils for open heater detection.
5. Remote operation via contact closure (low voltage, low current) with
timed shut off.
6. Built-in snow detector system (requires Snow Detector assembly option).
7. Auto-Off-Local switch.
8. High temperature limit thermostat/shut off.
9. Adjustable air temperature control.
10. Adjustable rail temperature control.
11. Reply indication via EHAB contact closure.
12. Fail indication via EHAB contact closure.
13. Main circuit breaker.
14. Audible tone before blower startup
15. Weather tight gasketed control enclosure
16. Status indicating lights for all control functions
17. Start delay timer for sequential startup
18. Run timer for timed operation
19. Selectable "Transparent" snow detector operation
20. Snow detect timer
21. All ductwork and nozzles are thermally and electrically isolated from
tracks
22. Quick-release track duct
23. Blower motor starter with overload protection
24. Elevated air intake
25. Adjustable delay for start up (1 Sec. -4.5 Min.)
26. All components mounted and wired within main unit – no external wiring
required except for remote control, indications and optional snow
detectors.
27. Galvanized case constructed of 14-gauge steel, high temperature powder
coated finish.
28. Convenient panel access to fuses and heating elements.
29. Galvanized steel adjustable mounting foundations.
30. Standard ductwork: heat duct with straight insulated flexible
duct and heavy duty insulated offset duct connects to main tie duct
electrically insulated between rails, 24 inch (minimum) switch point
nozzles.

P/N R9340-0104 7 © 2010 RAILWAY EQUIPMENT CO.
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II. COMPONENT DESCRIPTION
A. MAIN HOT AIR BLOWER (HAB) UNIT
1. MAIN CIRCUIT BREAKER: Provides main over-current protection and
manual on-off control of electrical power.
2. MOTOR CONTACTOR: Provides automatic blower motor control, with high
current contacts.
3. MOTOR OVERLOAD RELAY: Protects the blower motor from an over-
current condition.
4. CONTROL MODULE: Provides complete control of operation. See separate
description and details, section IV.
5. AIRFLOW SWITCH: Located in the heat duct, the sail switch indicates proper
airflow before and during burner operation. The differential setting is determined
by elevation.
6. AIR TEMPERATURE SENSOR: This is an analog type sensing circuit to
monitor the ambient air temperature.
7. BLOWER MOTOR: The motor is totally enclosed and fan cooled.
8. BLOWER: The high efficiency blower wheel is dynamically balanced for
smooth and quiet operation.
9. BUZZER: The buzzer will sound a 10-second tone immediately before the
motor contactor is energized.

P/N R9340-0104 8 © 2010 RAILWAY EQUIPMENT CO.
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B. STANDARD DUCTWORK
1. HEAT DUCT: The first section of ductwork attached to the main HAB unit.
This duct contains the heaters, fuses, air flow switch and overtemp.
2. FLEX DUCT: Connects the heat duct to the offset duct. It is a section of
flexible duct, enclosed in an insulated sheet metal wrapper.
3. HEAVY DUTY OFFSET DUCT: Connects the flex duct to the tie outlet duct.
This duct provides an 8” offset.
4. TIE OUTLET DUCT: The outlet duct extends under the rails in place of a tie
and directs the airflow to the point nozzles and track ducts. The rail attaches to
the duct using tie plates and E clips. The tie plates are electrically insulated from
the rail using an insulating kit. There are six openings in the top for point nozzles
and track duct nozzles. Refer to the drawing page for the duct layout.
5. TRACK DUCTS: These ducts rest on brackets on the ties and the outlet duct.
They are installed over the track duct nozzles. The track ducts consist of a 5’
point, a 5’ mid, and 10’ sections to complete the desired length.
6. TRACK DUCT NOZZLE: Attaches to the inner two rectangular openings on
the top of the outlet duct. Directs airflow down the length of the switch through
the track ducts.
7. TRACK DUCT NOZZLE ISOLATING KIT: This is an electrically insulating
gasket with insulating washers and hardware to provide isolation between the
nozzles and the outlet duct. Refer to drawing 9278-0027 for proper installation.
8. QUICK CHANGE NOZZLE PLATE: This plate allows for quick removal or
installation of nozzles to the tie duct, by simply loosening of four bolts the nozzle
assembly can be removed or installed.
9. TRACK DUCT SUPPORT BRACKET: These brackets are used to secure the
track duct in position. Refer to drawing 92774.
10. SWITCH POINT NOZZLE: These nozzles direct heated air down the switch
point. They are mounted on the outlet duct. They can be adjusted for proper
airflow direction. Nozzles may be shortened by up to 10” for proper fit.
11. POINT NOZZLE ISOLATING KIT: This is an electrically insulating gasket
with insulating washers and hardware to provide isolation between the nozzles
and the outlet duct. Refer to drawing 9278-0021 for proper installation.

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C. OPTIONAL DUCTWORK
1. EXTENSION DUCTS: Extension ducts of various lengths are available to meet
specific requirements. These are insulated and enclosed in a metal wrapper.
Make sure the duct is mounted in the correct orientation, as there is an access
opening underneath the insulating wrapper cover. If additional duct extensions
are required, this assembly can be added between the outlet duct and the offset
duct.
2. 7’ TRACK DUCT: These track ducts are seven feet long. They are often
mounted outside of the track near the switch machine. A kit is available (P/N
9278-0270) that includes a 7’ track duct, a track duct nozzle and a track duct
isolation kit.
OTHER DUCTWORK ASSEMBLIES ARE AVAILABLE. CONSULT THE
FACTORY FOR SPECIAL DUCTWORK NEEDS.

P/N R9340-0104 10 © 2010 RAILWAY EQUIPMENT CO.
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(INTENTIONALLY LEFT BLANK)