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Placing The Boiler (OWB-9 – OWB-25)
1. Move the boiler as close as possible to its final location in the crate.
2. Remove the two lag screws holding the rear feet to the skid.
3. Remove the front jacket panel. Cut the band holding the front of the boiler to the
skid.
4. Move the boiler into the final position.
5. Waste Oil Piping: USE ONLY 3/8" nominal ID copper tubing with flare fittings only on the
oil suction from the tank to the oil pump and oil pump to burner. DO NOT use ferrule
fittings or teflon tape on any pipe fittings. Keep suction line approximately 6" from
bottom of oil tank to prevent suction of sludge (Figure 11). Use only an inside oil storage
tank. Do Not draw from an outside tank, especially not an underground tank directly to
burner. A separate transfer pump from an outside tank with proper filtration to the inside
supply tank is acceptable.
6. The fuel pump included with burner is to be mounted at tank level or below. PUMP MUST
BE MOUNTED HORIZONTAL AND LOCATED NEXT TO WASTE OIL SUPPLY TANK.
1,
Oil Feed Line, 3/8" to connector on burner gun assembly
O Suction Line, 3/8" copper tubing
2,
3,
Suction Line 6" min from bottom of tank to prevent sludge from being introduced into
the supply line
Waste Oil Supply Tank
Figure 11.
The breeching connection on OWB-9, OWB-15 and OWB-25 is 7 inches regardless of
input. Refer to Table 1 for minimum breeching sizes. Breeching run should be as short
as possible with as few elbows a practical. Unless marginal draft conditions exist, a
brametric draft control must be installed in the breeching and should be approximately 18
inches from the boiler breeching connection. Breeching should not project into the
chimney beyond the inside wall of the chimney. Connect the breeching to the chimney
with a thimble or slip joint to facilitate cleaning. See Figure 12.
♦
Econo Heat
5714 1st Avenue
100270 Rev A4
INSTALLING THE BOILER
2
3
Waste Oil Pump
BREECHING INSTALLATION
♦
Spokane Washington 99212.
1
Boiler
♦
♦
(509)534-1022
www.econoheat.com
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Table of Contents
Summary of Contents for Econo Heat OWB-9
- Page 1 Figure 11. BREECHING INSTALLATION The breeching connection on OWB-9, OWB-15 and OWB-25 is 7 inches regardless of input. Refer to Table 1 for minimum breeching sizes. Breeching run should be as short as possible with as few elbows a practical. Unless marginal draft conditions exist, a brametric draft control must be installed in the breeching and should be approximately 18 inches from the boiler breeching connection.
- Page 2 Figure 12. INSTALLING THE BOILER CONTROLS AND ACCESSORIES Accessories for Boilers OWB-9, OWB-15, and OWB-25: a) Take the L8148A Aquastat relay, the well, the pressure relief valve with pipe nipple and the temperature/pressure gauge from the large carton which was packed in the wirebound crate.
- Page 3 Remove the circulating pump from its carton in the crate and mount it to the pump flange on the end of the return manifold. Bare Boiler: The pressure relief valve and temperature/pressure gauge are supplied with the boiler and should be mounted as shown in Figure 13. The bare boiler does not include the return manifold.
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Page 4: Water Piping Connections
WATER PIPING CONNECTIONS OWB-9, OWB-15, and OWB-25 boilers are shipped complete with circulating pump. To make the piping connections to the boiler ready to connect to the system piping, the following will also be required at a minimum: 1 – Air Purger (same size as supply pipe) 1 –... - Page 5 Closed Type Expansion Tank Pressure Relief Valve 3/4 in. Supply System Shutoff Valve Cold Water Feed Fill Valve Return From System Drain Cock Circulation Pump Figure 16. (b) Piping connections with diaphragm expansion tank--- See Figure 17. The cold water feed to the pressure reducing fill valve may be piped with 1/2 inch pipe.
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Page 6: System Piping
SYSTEM PIPING Supply and return and system piping should be sized by determining the pressure drop, required flow rate and pump capacity. WARNING Discharge piping from relief valve must be piped to a drain or must terminate 6” above floor to eliminate damage to the structure or personal injury. It must not be piped to a point where freezing might occur. - Page 7 Isolation Valves Flow Control Valves Shutoff Valve Cold Water Feed Drain Cock Isolation Valves Circulating Pumps Figure 19. MULTIPLE ZONING WITH CIRCULATORS ----- Each pump will require a separate relay (Honeywell R845A or White Rodgers 829A- 845, or equivalent). Install a flow control valve in each zone including the indirect water heater to prevent gravity circulation.
- Page 8 Return from System Supply to System Stem Thermometer Shutoff Valve Circulating Pumps Bypass A Cold Water Feed Drain Cock Circulating Pumps Adjust the two manual valves to maintain 160 degree F or more in the boiler while holding the supply water temperature at the stem thermometer at 140 degree F or whatever minimum temperature system requires.
- Page 9 Supply to System Shutoff Valve Cold Water Feed Return from System Circulating Pumps Drain Cock Adjust the two manual valves to maintain 135 degree F or more in the boiler with return water at the lowest temperature to be expected. Figure 21.
- Page 10 Indirect Water Heater (Storage Tank With Coil) Supply to System Shutoff Valve 3 Port Zone Valve Cold Water Feed Return from System Drain Cock Circulating Pumps Figure 22. INTEGRATED SYSTEM WITH MULTIPLE HEATING ZONES AND NO PRIORITY FOR DOMESTIC HOT WATER, USING ZONE VALVES----- Where the boiler output is large relative to the heating capacity of the coil in the indirect water heater priority for domestic hot water is not necessary.
- Page 11 Indirect Water Heater Supply to System Shutoff Valve Zone Valves Cold Water Feed Return from System Drain Cock Circulating Pumps Figure 23. INTEGRATED SYSTEM, SINGLE OR MULTIPLE HEATING ZONES, USING CIRCULATING PUMPS RATHER THAN ZONE VALVES---- Each pump will require a separate relay (Honeywell R845A or White Rodgers 828A- 845, or equivalent).
- Page 12 When burner is operating the water flow throughout the boiler shall be not less than 1.8 GPM for each 100,000 BTU/HR of gross boiler output. Size blend pump accordingly. See Table 3 Blend Pump Primary/Secondary Pump Boiler Model OWB-9 OWB-15 OWB-25 OWB-35 16.3 78.9 OWB-50 19.6...
- Page 13 Amtrol #720 Air Eliminator or Equal System Supply Separator System Circulator Pressure Reduction Blend Pump Valve Backflow System Check Valve Preventer Return To Size Blend From City Expansion Tank Pump See Table 3 Water Supply Figure 26. 10. SINGLE OR MULTIPLE BOILER PIPING FOR PRIMARY/SECONDARY PUMPING Size Secondary Pump GPM at Gross Boiler Output for 20”...
- Page 14 11. MULTIPLE BOILER PIPING- REVERSE RETURN FLOW WITH BLEND PUMP Amtrol #720 Air Eliminator or Equal System Supply Check Valve System Circulator Air Separator Pressure Reduction *Blend Pump Valve Backflow Preventer *Blend Pump Check Valve From City System Water Expansion Tank Return Supply Figure 28.
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Page 15: Burner Mounting
Figure 29. OWB-35 and OWB-50 Burner Mounting & Boiler Door Detail Figure 30. OWB-9, OWB-15 and OWB-25 Burner Mounting & Boiler Door Detail Installation, Operation, And Service Instructions... -
Page 16: Boiler Jacket Assembly
Boiler Jacket Assembly Sight Class Assy Figure 31. OWB-35 and OWB-50 Assembly Detail OWB-35 and OWB-50 Jacket Installation Instructions 1. Screw the four extension setscrews (43) into the four outer holes in the corners of the rear sections. Securely tighten the setscrews and other fastening bolts of the flue outlet cover (22) 2. - Page 17 11. Remove sight glass plug in front door and install sight glass assembly. Sight Glass (25) Sight Glass Tube Cap(26) and Sight Class Gasket(48). Figure 32. OWB-9, OWB-15 and OWB-25 Assembly Detail OWB-9, OWB-15 and OWB-25 Jacket Installation Instructions 1. Attach the rear jacket mounting brackets (7) to rear tie rod ends on back of boiler using the 12mm nut (9) provided on the end of each tie rod.
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Page 18: Boiler Tube Insert Assembly
5. Attach one door bracket (18) to the bottom of both the left and right side jacket panels. Use two 8-32x1/2” screws (19) and nuts (20) to assemble each door bracket. 6. Attach the left and right side jacket panels to the boiler. The front end of the right side panel is attached to the hinge using 10-24x3/4 screws (21). - Page 19 Single Zone Wiring WARNING All wiring and grounding must be done in accordance with the authority having jurisdiction or, in the absence of such authority, with the National Electrical Code (ANSI/NFPA70). 1) 120 Volt Wiring—The boiler should be provided with its own 20A branch circuit with fused disconnect.
- Page 20 thermostat connections so that any zone valve that opens will also start the circulator and fire the boiler(assuming the high limit is not open). Zone valve terminal TH/TR has no internal connection on the zone valve; it is merely a “binding post” used to connect two or more wires.
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Page 21: Burner Assembly
Manual High Thermostat Limit Water (Supplied By Installer) L4006E Cutoff Service Switch 120 VAC Fused Disconnect Switch L1 L2 Honeywell Jumper (Items Supplied By Installer) L8148A Aquastat B1 B2 Electrical Box (Looking at Socket Side) Circulator Power Socket Oil Pump PREHEATER BLOCK CONTROLLER Oil Valve... - Page 22 High High Thermostat Limit Limit Water (Supplied by Installer) L4008A L4006E Cutoff Service Switch 120 VAC Honeywell (Supplied by Installer) R845A Set Temp 20 Fused Disconnect Switch Deg Higher (Items Supplied By Installer) Than L4008A Electrical Box (Looking at Socket Side) Circulator (Supplied by Installer) Power Socket...
- Page 23 Figure 35. WIRING DIAGRAM, ZONE WIRING USING HONEYWELL V8043F VALVES (FACTORY BOILER WIRING NOT SHOWN –SEE FIGURE 33 OR 34) Figure 36. WIRING DIAGRAM, CIRCULATOR ZONE WIRING USING HONEYWELL R845A’S (FACTORY DIAGRAM WIRING NOT SHOWN –SEE FIGURE 33 OR 34) Installation, Operation, And Service Instructions...
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Page 24: Boiler Start-Up And Adjustments
BOILER START-UP AND ADJUSTMENTS FILL SYSTEM 1. Close manual air vents (if used) and automatic air vents. Attach hose to boiler drain on return connection and run to a drain or to outdoors. Open drain cock and close shutoff valve on boiler supply pipe. 2. -
Page 25: Waste Oil Burner Startup
WASTE OIL BURNER STARTUP WARNING DO NOT fire boiler without water or boiler sections will overheat and eventually crack 6. IMPORTANT- Prior to starting the unit, pre-fill the filter and fuel line with oil to assist priming procedure. Oil pump motor turns at low RPM’s and would take significant time to complete priming process if not pre-filled. -
Page 26: Maintenance
MAINTENANCE WASTE OIL BURNER: 1. Weekly Drain water from storage tank. 2. Monthly Clean pump screen on oil pump assembly of sludge and remove any water. Access to screen is by removing pump cover. Clean flame cone of deposits. 3. Yearly Inspect and adjust electrodes per (figure 37). CAUTION: turn off main electrical power before checking or adjusting electrode settings. - Page 27 Figure 37 –Electrode Adjusment Diagram When cleaning, inspect all three pieces thoroughly. When disassembling and reassembling nozzle, keep facing up as shown. Figure 38 –Nozzle Assembly Detail Installation, Operation, And Service Instructions...