Sterling Separated Combustion Tubular Gas Fired Unit Heater Installation Instructions And Parts List Download Page 3

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GENERAL SAFETY INFORMATION

 Failure to comply with the general

safety information may result in extensive
property damage, severe personal injury, or
death.

Installation must be made in accordance with local
codes, or in absence of local codes, with the latest
edition of ANSI Standard Z223.1 (N.F.P.A. No. 54)
National Fuel Gas Code.

 All of the ANSI and NFPA

Standards referred to in these installation instructions
are those that were applicable at the time the design of
this appliance was certified. The ANSI Standards
are available from CSA Information Services,1-800-463-
6727. The NFPA Standards are available from the
National Fire Protection Association, Batterymarch Park,
Quincy, MA  02269.

If installed in Canada, the installation must conform with
local building codes, or in the absence of local building
codes, with CGA-B149.1 "Installation Codes for Natural
Gas Burning Appliances and Equipment" or CGA-B149.2
"Installation Codes for Propane Gas Burning Appliances
and Equipment." These unit heaters have been designed
and certified to comply with CGA 2.6.

 Do not alter the unit heater in any

way or damage to the unit and/or severe personal
injury or death may occur!

Disconnect all power and gas

supplies before installing or servicing the heater.
If the power disconnect is out of sight, lock it in
the open position and tag it to prevent unexpected
application of power. Failure to do so could result
in fatal electric shock, or severe personal injury.

 Ensure that all power sources conform

to the requirements of the unit heater, or damage to
the unit will result!

Follow installation instructions CAREFULLY to avoid
creating unsafe conditions. All wiring should be done
and checked by a qualified electrician, using copper wire
only. All gas connections should be made and leak-
tested by a suitably qualified individual, per instructions
in this manual.  Also follow procedures listed on "Gas
Equipment Start-Up Sheet" located in this manual.

Use only the fuel for which the heater is designed (see
rating plate). Using LP gas in a heater that requires
natural gas, or vice versa, will create risk of gas leaks,
carbon monoxide poisoning, and explosion.

 This product must be installed by

a licensed plumber or gas fitter when installed
within the Commonwealth of Massachusetts.

 Do not attempt to convert the

heater for use with a fuel other than the one
intended. Such conversion is dangerous, as it
will create the risks previously listed.

Make certain that the power source conforms to the
electrical requirements of the heater.

 Do not depend upon a thermostat

or other switch as sole means of disconnecting
power when installing or servicing heater.  Always
disconnect power at main circuit breaker as
described above.  Failure to do so could result in
fatal electric shock.

Special attention must be given to any grounding
information pertaining to this heater. To prevent the risk
of electrocution, the heater must be securely and
adequately grounded. This should be accomplished by
connecting a ground conductor between the service panel
and the heater. To ensure a proper ground, the grounding
means must be tested by a qualified electrician.

Do not insert fingers or foreign objects into heater or its
air moving device. Do not block or tamper with the heater
in any manner while in operation, or just after it has been
turned off, as some parts maybe hot enough to cause
injury.

This heater is intended for general heating applications
ONLY. It must NOT be used in potentially dangerous
locations such as flammable, explosive, chemical-laden,
or wet atmospheres.

Do not attach ductwork to this product or use it as a
makeup air heater. Such usage voids the warranty and
will create unsafe operation.

In cases in which property damage may result from
malfunction of the heater, a back-up system or
temperature sensitive alarm should be used.

 The open end of piping systems being

purged shall not discharge into areas where there
are sources of ignition or into confined spaces
UNLESS precautions are taken as follows: (1) by
ventilation of the space, (2) control of the purging
rate, (3) elimination of all hazardous conditions.  All
precautions must be taken to perform this operation
in a safe manner!

Unless otherwise specified, the following conversions
may be used for calculating SI unit measurements:
1 foot = 0.305 m
1 inch = 25.4 mm
1 gallon = 3.785 L
1 pound = 0.453 kg
1 psig = 6.894 kPa
1 cubic foot = 0.028m

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1000 BTU/cu. ft. = 37.5 MJ/m

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1000 BTU per hour = 0.293 kW
1 inch water column = 0.249 kPa
liter/second = CFM x 0.472
meters/second = FPM ÷ 196.8

Summary of Contents for Separated Combustion Tubular Gas Fired Unit Heater

Page 1: ...S AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT THE POINT OF INSTALLATION RECORD THE UNIT MODEL AND SERIAL No s IN THE SPACE PROVIDED RETAIN FOR FUTURE REFERENCE INSTAL...

Page 2: ...ECTIONS 9 10 VENTING 11 12 13 14 15 OPERATION Explanation of Controls and Operation 16 Main Burner Orifice Schedule 17 Adjustments 17 High Altitude Operation 17 18 MAINTENANCE Servicing Cleaning 18 TR...

Page 3: ...ust be installed by a licensed plumber or gas fitter when installed within the Commonwealth of Massachusetts Do not attempt to convert the heater for use with a fuel other than the one intended Such c...

Page 4: ...ht lbs 62 68 87 93 kgs 28 31 39 42 Shipping Weight lbs 72 78 102 108 kgs 33 35 46 49 DIMENSIONS XXX STANDARD UNITS DIMENSIONS IN PARENTHESIS XXX MILLIMETERS Ratings shown are for unit installations at...

Page 5: ...t 3 05m above the upper surface of wings or engine enclosures of the highest aircraft to be stored in the hangarand8feet 2 44m abovethefloorinshops offices and other sections of the hangar where aircr...

Page 6: ...system or the electrical conduit for support Failure to heed these warnings may result in property damage personal injury or death Unit Heaters must be hung level from side to side and from front to...

Page 7: ...avity Gas Nominal Iron Internal Length of Pipe Feet meters Pipe Size Dia 10 20 30 40 50 60 70 80 90 100 125 150 175 200 in in 3 0 6 1 9 1 12 2 15 2 18 3 21 3 24 4 27 4 30 5 38 1 45 7 53 3 61 0 1 2 0 6...

Page 8: ...For propane gas operation the manifold pressure must be 10 in W C 2 5 kPa For propane LP gas the minimum supply pressure must be 11 in W C 2 7 kPa A field LP tank regulator must be used to limit the...

Page 9: ...m shipped with your unit either affixed to the side jacket or enclosed in the installation instructions envelope Should any original wire supplied with the heater have to be replaced it must be replac...

Page 10: ...er Units with Natural and Propane LP Gas NOTICE See Figures 5A 5B and 5C for connecting the thermostat to the unit heater If using a standard low voltage thermostat with a sub base switch for fan cont...

Page 11: ...depicted in Figure 7 7 The equivalent length of the combustion air system must not be less than 5 feet 1 5m and must not exceed 40 feet 12m Equivalent length equals the total length of straight pipe p...

Page 12: ...at 4 foot 1 2m intervals in the U S and at 3 foot 0 91m intervals in Canada 10 The exhaust vent system must remain at a minimum distance of 1 inch 25mm from all combustible materials Any part of the...

Page 13: ...13 Figure 7 Vertical Intake Vent Installation Figure 6A Concentric Vent Installation...

Page 14: ...4 Figure 8 Horizontal Intake Vent Installation Figure 9 Horizontal Intake Vent Installation VENTING continued Vent Terminal 1 8M Min Adjacent Building D 3330 6 0 Min 0 9M Min 3 0 Min Building Overhang...

Page 15: ...4 inch per foot pitch for condensate drainage toward the outside of the building See Figure 8 The location of the vent terminal must be in accordance with the National Fuel Gas Code ANSI Z223 1 in th...

Page 16: ...thermostat is satisfied or the limit switch interrupts the flow of electric current to the control board the unit will beginapost purgeperiod Whenthepost purgeperiodends thepowerventermotor is de ene...

Page 17: ...e time required to burn one cubic foot of gas into the following formula and compute the input rate 3600 Sec per Hr X BTU Cu Ft Input Rate Time Sec For example Assume the BTU content of one cubic foot...

Page 18: ...f the burner toward the fan side of the unit and slide the burner off the tabs See Figure 10 5 With the burners removed wire brush the inside surfaces of the heat exchanger 6 Remove any dirt dust or o...

Page 19: ...openings 3 Clean heat exchanger Refer to Installation 4 Determine cause and repair accordingly 1 Inspect all gas piping and repair 2 Check to ensure gas test ports are seated 3 Clean heat exchanger f...

Page 20: ...at 1 Replace or tighten 2 Clean power ventor wheel 3 Realign power ventor wheel 1 Check and tighten wires on fan circuit 2 Test for 115v on terminal ACB Heat and L2 if voltage is present replace motor...

Page 21: ...open when unit is running or is the switch open during start up 4 Check for 24v on line side of the high limit Constant voltage should be recorded if not control board is suspect Check flash code 1 Ch...

Page 22: ...p fuse on circuit board 1 Common side of transformer grounded to chassis 2 Loose spark ignitor 1 Gas supply off or gas supply pressure too low 2 Flame sense rod contaminated or loose wire 3 Gas valve...

Page 23: ...ar Ass y 24 Vinyl Tubing Pressure Switch 25 Power Venter Mounting Plate 26 Louver 27 Louver Spring 28 Burner Box Rear Panel 29 Service Panel 30 Hose Clamp 31 Top Bottom Jacket Panel w Insulation 32 Fr...

Page 24: ...ler Parts Figure 13 Component Parts Figure 15 Power Ventor Assembly D6963 D03339 D4810 NOTE No rubber grommets are equipped with the 30 and 45 unit sizes Pressure Switch Gas Valve D4430 Fan Guard Fan...

Page 25: ...expenses including labor or material incurred during removal or reinstallation of the Product c to any damage due to corrosion by chemicals including halogenated hydrocarbons precipitated in the air...

Page 26: ...ll field installed controls been installed Do you understand all the controls on this equipment If not contact your wholesaler or rep DO NOT START this equipment unless you fully understand the contro...

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