LAARS Horizon User Manual

Installation, Operation and Maintenance Instructions Document 1104B
Installation, Operation and Maintenance Instructions for
Horizon
Oil Fired Boiler
OUT OF
PRODUCTION
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in boiler installation and maintenance. Improper installation and/or operation could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death. Improper installation and/or operation will void the warranty.
WARNING
If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Installation and service must be performed by a qualified installer, service agency, or fuel oil supplier.
57-207B
A subsidiary of BRADFORD WHITE Corporation
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LAARS Heating Systems Company
TABLE OF CONTENTS
SECTION 1. General Information
1A. Freight Claims .............................................. 3
1B. General Information ...................................... 3
1C. Boiler Installation .......................................... 3
1D. Boiler Location .............................................. 3
1E. Boiler Clearances (minimum) ....................... 3
1F. Floor ............................................................. 3
1G. Combustion and Ventilation Air ..................... 3
1H. Chimney and Draft Requirements .................3
1I. Jacket (normally fitted).................................. 3
1J. Oil Burner (normally fitted) ............................ 3
1K. Boiler Controls (normally fitted) ..................... 3
1L. Oil ................................................................. 4
1M. Oil Storage and Pipe Layout ......................... 4
1N. Electrical Connections .................................. 4
OUT OF
1O. Operation
(using Honeywell L.8124A aquastat relay) .... 4
1P. Domestic Water Piping ................................. 4
SECTION 2. Maintenance
2A. Cleaning the Boiler ....................................... 4
2B. Cleaning the Chimney................................... 4
2C. Servicing the Burner ..................................... 4
2D. Maintenance of the Tankless Coil ................. 5
2E. Coil Removal ................................................ 5
SECTION 3. Part Numbers
................................................................... 11
PRODUCTION
Horizon
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SECTION 1.
General Information
1A. Freight Claims
Inspection should be made of boiler and components for damage upon arrival. Any claims for damage should immediately be filed against the carrier by the consignee.
1B. General Information
These boilers have been designed and constructed according to the requirements of the relevant ASME Codes using heavy gage steel plate and boiler tubes. They are of the three pass horizontal tube design using a reverse flame technique in the boiler to impart a high heat transfer in the primary heating zone before directing gases into the third pass.
The compact tubular third pass incorporates special stainless steel flue gas baffles with extension rods to allow full insertion of the baffles into the back end of tubes where they are most effective.
A 5 gal/min. domestic hot water coil is located at the top of the boiler in the hottest zone for ample hot water supply. A unique feature of its attachment is the raised coil flange which allows the use of clamping bolts rather than studs, thereby eliminating water leaks caused by broken studs.
Two ceraform lined doors provide easy access for cleaning, the lower door with burner attached remaining in position while the upper door is removed for tube cleaning.
up burner and a test hole gives access for CO draft readings.
enamel jacket and comes completely pre-assembled for easy installation. Alternatively, it can be supplied in knock-down form.
This boiler is designed for use in closed systems where air is eliminated from the system and no more oxygen is allowed to enter (typical baseboard or radiator system). Do not directly connect this boiler to a system utilizing rubber or plastic tubing which has an oxygen permeation rating greater than 0.1 milligrams / liter / day. Damage to the boiler will result and the warranty will be void (see warranty section 4g).
1C. Boiler Installation
should be made to the National Fire Protection Standard for Oil Burning Equipment - NFPA 31 ­Latest Edition.
PRODUCTION
A flame observation port is provided for setting-
The boiler is encased in a fully insulated baked
For recommended installation practice reference
OUT OF
and
2
Caution
1D. Boiler Location
The boiler should be positioned as near to the chimney as possible and have a minimum smoke-pipe connector length of 18".
1E. Boiler Clearances (minimum)
Top - 6"; Front - 24"; Rear - 6"; Sides - 6".
1F. Floor
The boiler must be mounted on a non­combustible masonry or cement floor with no combustibles underneath.
1G. Combustion and Ventilation Air
To insure an adequate supply of fresh air for combustion and ventilation an inlet and outlet opening should be provided at floor and ceiling level. Each opening must have a minimum of one square inch of free area for every 1000 BTU/h of input or 140 square inches per gallon of oil burned per hour. The openings must not be in a position liable to blockage.
1H. Chimney and Draft Requirements
To assure the safe and proper operation of the oil burner the boiler must be connected to a chimney having sufficient draft at all times to evacuate the flue gases to atmosphere. A draft regulator should be installed in the smoke-pipe as near to the flue as possible and adjusted to achieve an over fire draft of
0.01 in. W.C.
1I. Jacket (normally fitted)
If not fitted, assemble panels in accordance with instructions in Figure 2.
1J. Oil Burner (normally fitted)
If not fitted, insert burner tube into boiler so that it is recessed approximately 1/4" back from the inside wall of door insulation, then clamp mounting flange and bolt up to front-plate.
The burner should be wired and connected to the oil line in accordance with the manufacturer’s instructions.
1K. Boiler Controls (normally fitted)
If controls are supplied separately, fit them to the boiler in the positions shown in Figure 2, with jacket in place.
Circulator - 1 1/4' return tapping at rear of boiler.
Tridicator - temp./press. gauge - 1/2" tapping at top of boiler.
Relief Valve - 3/4" tapping at top of boiler. Pipe to safe place of discharge.
Aquastat Relief - L8124A - 3/4" tapping.
Fit a drain valve (not supplied) in the hydronic return tee. Check that all connections are made water tight.
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LAARS Heating Systems Company
1L. Oil
Use only No. 2 Heating Oil. Do not use gasoline,
crankcase draining or any oil containing gasoline.
1M. Oil Storage and Pipe Layout
(See Figures 3 and 4) Figure 3: One-pipe system - pipe and tank layout. Figure 4: Two-pipe system - pipe and tank layout.
1N. Electrical Connections
All electrical wiring must conform to local codes and/or the National Electrical Code ANSI / NFPA No. 70 - Latest Edition. The system must be electrically grounded in accordance with the requirements of the authority having jurisdiction or, in the absence of such requirements, with the National Electrical Code mentioned above.
1O. Operation
(using Honeywell L.8124A
aquastat relay)
A call for heat from the room thermostat causes the relay to “make” the burner circuit and also feed the circulator, provided the boiler water temperature is above the low limit setting (usually 190° to 210°F). The burner and circulator then continue to run until the room thermostat is satisfied.
A high limit switch shuts off burner in the event of water temperature exceeding the high limit setting, usually 20° to 30°F above the low limit setting.
The low limit switch and circulator maintain boiler water temperature for domestic hot water service and prevents circulation of heating system water if domestic water is not hot enough.
1P. Domestic Water Piping
Connect hot water tempering valve (12) “HOT” port to hot water outlet from unit. This valve should be mounted 8" to 12" below the outlet and set for 120°F mixed delivery temperature or as local codes dictate.
PRODUCTION
OUT OF
Connect gate or shutoff valve (13) to tempering
valve (12) “MIX” port, and cold water inlet.
Connect pressure relief valve (11) (if required by codes), maximum 150 PSI as close to the unit as possible. No other valves or restrictions may be installed between the DHW coil and the relief valve.
(DO NOT USE A TEMPERATURE/ PRESSURE RELIEF VALVE AS THIS IS NOT A STORAGE HOT WATER HEATER).
SECTION 2. Maintenance
WARNING
Flue gases are dangerous - do not operate boiler if there is an escape of flue gas. Call a qualified serviceman and have the entire flue and venting system inspected.
2A. Cleaning the Boiler
To maintain the high thermal efficiency and a long life from your boiler, it should be cleaned at least once a year, preferably at the end of the heating season. This is particularly important as rusting can occur when the boiler is idle.
It is recommended that a service contract be arranged with a properly equipped serviceman who will be able to do the job efficiently and without mess.
1. Switch off electrical supply to the boiler.
2. Remove front cleaning cover.
3. Remove flue baffles and thoroughly brush out
flue tubes.
4. Remove flue deposits from flue collector box
using a vacuum nozzle through side cleaning
ports.
5. Vacuum out accumulated deposits from
combustion chamber through cleaning cover
opening.
6. Replace all parts, ensuring flue baffles are
correctly located and cleaning cover is tightly
sealed.
B O
I L E R
Figure 1.
13
11
8 - 12"
12
2B. Cleaning the Chimney
Sweep all soot deposits from chimney and smoke-pipe once a year, preferably at the end of the heating season. It is also advisable to inspect the chimney and smoke-pipe at the beginning of heating season as birds may have built their nest inside or other material may be causing a blockage.
2C. Servicing the Burner
This should only be carried out by a trained and licensed service technician in accordance with the burner maker’s instructions.
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