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80+ SINGLE STAGE GAS FURNACE
See section 5 for Category I definition.
Recognize safety information. This is the safety--alert symbol
to the potential for personal injury.
Understand the signal words DANGER, WARNING, or CAUTION. These words are used with the safety--alert symbol. DANGER identifies the
most serious hazards, those that will result in severe personal injury or death. WARNING signifies a hazard that could result in personal injury or
death. CAUTION is used to identify unsafe practices that may result in minor personal injury or product and property damage. Note is used to
highlight suggestions that will result in enhanced installation, reliability, or operation.
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment.
Untrained service personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels at-
tached to or shipped with the furnace and other safety precautions that may apply.
Follow all safety codes. In the United States, follow all safety codes including the National Fuel Gas Code (NFGC) ANSI Z223.1--2006/NFPA
54--2006. Wear safety glasses and work gloves. Have fire extinguisher available during start--up and adjustment procedures and service calls.
These instructions cover minimum requirements and conform to existing national standards and safety codes. In some instances, these instruc-
tions exceed certain local codes and ordinances, especially those that may not have kept up with changing residential construction practices. We
require these instructions as a minimum for a safe installation.
International Comfort Products, LLC
Lewisburg, TN 37091 U.S.A.
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ELECTRIC SHOCK HAZARD
Failure to follow this warning
could result in injury or death.
Turn Off All Power Before
Servicing.
Portions of the text and tables are reprinted from NFPA 54 / ANSI Z223.1--2006©, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association,
Washington, DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subject, which is represented only by the standard in its entirety.
Printed in U.S.A.
Category I Furnace
H8UH5, MUF, HL
220V- 1 ph- 50Hz
SAFETY REQUIREMENTS
Table of Contents
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WARNING
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. When you see this symbol on the furnace and in instruction manuals be alert
INSTALLER: Affix these instructions
on or adjacent to the furnace.
CONSUMER: Retain these
instructions for future reference.
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Technical Support/Parts
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CARBON MONOXIDE POISONING AND FIRE
HAZARD.
Failure to follow this warning could result in
injury, death, and/or property damage.
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.
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WARNING
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July 2007
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Table of Contents
Related Manuals for International comfort products H8UH5050B12C2
Summary of Contents for International comfort products H8UH5050B12C2
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Page 1: Table Of Contents
We require these instructions as a minimum for a safe installation. International Comfort Products, LLC INSTALLER: Affix these instructions Lewisburg, TN 37091 U.S.A. - Page 2 START- -UP CHECK SHEET For 80+ Furnace (This sheet is optional. Keep this page for future reference.) Date of Start--Up: Calculated Firing Rate:(See Checks and Adjustments Section). Dealer Name: Heating Check Address: Measured Line Pressure when Firing Unit: City, State(Province), Zip or Postal Code: Measured Manifold Gas Pressure: Phone: Temperature of Supply Air:...
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Page 3: Safe Installation Requirements
1. Safe Installation Requirements • Always install furnace to operate within the furnace’s intended temperature--rise range with a duct system which has an external static pressure within the allowable range, FIRE, EXPLOSION, AND ASPHYXIATION HAZARD. as specified in “Technical Support Manual” of these Improper adjustment, alteration,... -
Page 4: Installation
furnace and to replace any part of the control system and any water pipes will not freeze. It is equipped with several safety devices gas control which has been under water. that are designed to turn the furnace off and prevent it from restarting in the event of various potentially unsafe conditions. - Page 5 • The air temperature rise is within the rated rise range on the • The furnace, ductwork and filters are cleaned as necessary to furnace rating plate, and the firing rate has been set to the remove drywall dust and construction debris from all HVAC rating plate value.
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Page 6: Side Venting
Upflow Figure 1. ONLY the corner of the cabinet is allowed to contact the rafters as shown in Figure 3. All other clearances MUST be No modifications are required for upflow installation. (See Figure 2) observed as shown in Figure 1. Typical Horizontal Installation Figure 3 Typical Upflow Installation... -
Page 7: Combustion & Ventilation Air
Venter Gasket Figure 5 Furnace with Screws Figure 4 Screws (2) Vent Plate 25--23--52c 25--23--45 Tighten the four (4) screws that secure the venter assembly to the collector box. Do tighten screws enough to compress venter gasket. Replace venter gasket (part # 1013540, if needed) to venter Replace power leads to venter motor and reconnect hose to assembly with adhesive in the same location as the old one. - Page 8 Requirements not less than the sum of the areas of all vent connectors in the space. Provide the space with sufficient air for proper combustion and ventilation of flue gases using horizontal or vertical ducts or The opening shall commence within 12″ (305 mm) of the top of the openings.
- Page 9 Indoor Combustion Air The Standard Method may be used, if the space has no less volume than 50 cubic feet per 1,000 BTUH of the maximum input Standard and Known- Air- Infiltration Rate Methods ratings for all gas appliances installed in the space. The standard ©...
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Page 10: Gas Vent Installation
5. Gas Vent Installation concrete chimney lined with a lining material acceptable to the authority having jurisdiction. Venting into an unlined masonry chimney or concrete chimney is prohibited. See CARBON MONOXIDE POISONING, FIRE AND the 6. Masonry Chimney Venting section in these EXPLOSION HAZARD. -
Page 11: Horizontal Venting
Listed, corrugated metallic chimney liner systems in masonry Figure 7 Vent Check chimneys shall be sized by using NFGC tables per 13.1.7 for dedicated venting and per 13.2.20 for common venting with the maximum capacity reduced by 20% (0.80 X maximum capacity) Vent Pipe Draft Hood and the minimum capacity as shown in the applicable table. - Page 12 Other than Direct Vent Termination Clearance Figure 8 25--24--65--2 AIR SUPPLY INLET VENT TERMINAL AREA WHERE TERMINAL IS NOT PERMITED Item Clearance Descriptions Canadian Installation (1) U.S. Installation (2) Clearance above grade, veranda, porch, deck, balcony, or 12″ (30cm) # 12″...
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Page 13: Masonry Chimney Venting
7. Masonry Chimney Venting condensate drain is required by local code, refer to the NFGC, Section 12.1 for additional information on condensate drains. CARBON MONOXIDE POISONING, FIRE AND Indicates the chimney exceeds the maximum permissible EXPLOSION HAZARD. size in the tables, the chimney should be rebuilt or relined to Failure to properly vent this furnace could result in conform to the requirements of the appliances being installed personal injury, death and/or property damage. - Page 14 CHIMNEY INSPECTION CHART Figure 9 For additional requirements refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1--2006 and ANSI/NFPA 211--2006 Chimneys, Fire- places, Vents, and Solid Fuel Burning Appliances in the U.S.A. or to the Canadian Installation Code CSA B149.1--05 in Canada. Crown condition: Rebuild...
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Page 15: Gas Supply And Piping
8. Gas Supply and Piping ighten the orifices so they are seated and gas tight about 1 ″ from the face of the orifice to the back of the manifold pipe (Figure 11). Make sure orifice is installed straight so that CARBON MONOXIDE POISONING, FIRE AND it forms a right angle (90°) to the manifold. - Page 16 14. Using pipe joint compound that is resistant to Propane gas, 19. Reassemble all parts in reverse order as removed. Attach tighten the fitting assembly into the inlet side of the gas valve. Propane Conversion Label next to the furnace rating plate or (Figure 13).
- Page 17 11. Measure pipe length from gas meter or Propane second stage regulator to determine gas pipe size. Figure 16 Gas Valve with Elbows Left Side Gas Supply Piping Gas line can be installed directly to the gas valve through the hole provided in the left side of the cabinet.
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Page 18: Electrical Wiring
Final Check • Test all pipe for leaks. • If orifices were changed, make sure they are checked for leaks. WARNING During pressure testing of gas supply piping system: • FIRE OR EXPLOSION HAZARD. a. If test pressure does not exceed ″... -
Page 19: Ductwork And Filter
Furnace Control Electrical Connections Figure 17 The furnace control is preset at the factory with ON delay of 36 seconds in the heating mode. The blower OFF timing is preset at 168 seconds. If desired, the fan OFF delay can be reset to obtain the longest delay times while still maintaining comfort levels. - Page 20 Filters When the furnace is located in an area near or adjacent to the living area, the system should be carefully designed with returns to A filter MUST be used. minimize noise transmission through the return air grille. Any blower moving a high volume of air will produce audible noise which A high--velocity filter(s) and rack(s) is supplied with these furnaces.
- Page 21 Internal Filter in Bottom- Return Installation Figure 20 Optional Duct Standoff When installing a bottom--mounted filter inside the furnace, install the filter clips on the edge of the bottom duct opening with the wider end of the clips toward the blower, as shown in Figure 23. Clips 20 x 25 Optional may be obtained from your distributor or fabricated from sheet Filter Rack...
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Page 22: Checks And Adjustments
Rack Flanges Downward Figure 25 Figure 26 Rack Flanges Upward 25--24--66 25--24--66a Insert the filter into the rack, and insert the plastic filter retainer (filter rack end cap) into the rack to close the rack opening. Clips are supplied with the furnace or can be fabricated from sheet metal (Figure 24). - Page 23 Remove manifold pressure adjustment screw cover on Remove jumper wire from R to W. furnace gas valve. Turn adjusting screw counterclockwise to decrease manifold pressure and clockwise to increase Relight all appliances. pressure. Orifice Sizing Typical Gas Valve Honeywell Figure 27 NOTE: Factory sized orifices for natural and Propane gas are listed in the furnace Technical Support Manual.
- Page 24 MANIFOLD PRESSURE AND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS NATURAL GAS MANIFOLD PRESSURE (in wc) For Models 050 thru 125 Table 5 MEAN ELEVATION FEET ABOVE SEA LEVEL HEATING 0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to VALUE 2000...
- Page 25 PROPANE GAS MANIFOLD PRESSURE (in wc) For Models 140 Table 8 MEAN ELEVATION FEET ABOVE SEA LEVEL HEATING VALUE at ALTITUDE 0 to 2001 to 3001 to 4001 to 5001 to 6001 to 7001 to BTU/CU. FT. 2000 3000 4000 5000 6000 7000...
- Page 26 Refer to Furnace Wiring Diagram for location of the heating and Ignitor Location Figure 31 cooling speed taps located on the electronic furnace control as in (mm) well as location of unused blower motor speed leads. Use the chart (Table 9 ) to determine the blower motor speed settings. (52.39) (6.4) Table 9...
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Page 27: Furnace Maintenance
Heating and Continuous- Fan Speed the Same Note: There should be only ONE motor lead going to the “Heat” and “Cont” terminals. If it is necessary to operate the heating speed and continuous--fan speed using the same blower speed, connect a jumper between the “Heat”... -
Page 28: Sequence Of Operation & Diagnostics
13. Sequence of Operation & Diagnostics The following is the normal operating sequence. Cooling (Y) Request: 24VAC signals applied to Y & G terminals of FCB (furnace control board) • Cool motor speed is energized after 6 second Cool Fan On Delay time. Y &... - Page 29 Heating Request with Gas Shut Off: 24 VAC signal applied to W terminal of FCB. The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours then try for ignition again as long as the heat call remains. Power reset will clear lockout.
- Page 30 Save This Manual For Future Reference Models H8UH5050B12C2 H8UH5075B12C2 H8UH5100F14C2 H8UH5125J20C2 H8UH5140J20C2 MUF050W3C2 MUF075W3C2 MUF100W3C2 MUF125W5C2 MUF140W5C2 HL12H3TRC2 HL18H3TRC2 HL25H3TRC2 HL31H4TRC2 HL34H5TRC2 International Comfort Products, LLC Lewisburg, TN 37091 U.S.A. 441 01 5003 01...
- Page 31 Model Specifications Manufacturers Number (Mfr No - See Rating Plate) ALL Models (H8UH5/MUF/HL) Specifications H8UH5050B12C2 H8UH5075B12C2 H8UH5100F14C2 H8UH5125J20C2 H8UH5140J20C2 MUF050W3C2 MUF075W3C2 MUF100W3C2 MUF125W5C2 MUF140W5C2 HL12H3TRC2 HL18H3TRC2 HL25H3TRC2 HL31H4TRC2 HL34H5TRC2 General Input (Btuh) 50,000 75,000 100,000 125,000 140,000 Temp. Rise ( °...
- Page 32 Circulation Air Blower Data H8UH5050B12, MUF050W3, HL12H3TR (1) H8UH5050B12, MUF050W3, HL12H3TR (1) Air Delivery in Liters Per Second (L/S) Air Delivery in CFM (Furnace Rated @ 0.5 in wc ESP) (Furnace Rated @ 249.0 Pa ESP) MED L MED H HIGH MED L MED H...
- Page 33 H8UH5125J20, MUF125W5, HL31H4TR (1) H8UH5125J20, MUF125W5, HL31H4TR (1) Air Delivery in Liters Per Second (L/S) Air Delivery in CFM (Furnace Rated @ 0.5 in wc ESP) (Furnace Rated @ 249.0 Pa ESP) MED L MED H HIGH MED L MED H HIGH 24.9 1050...
- Page 34 Wiring Diagram H8UH5, MUF, HL 441 01 5003 01 Specifications are subject to change without notice...
- Page 35 Parts for H8UH5, MUF, HL 25--23--49a--1 Representative drawing only, some models may vary in appearance. 441 01 5003 01 Specifications are subject to change without notice...
- Page 36 Replacement Parts - H8UH5, MUF, HL (Natural Gas) Models -- H8UH5050B12C2, H8UH5075B12C2, H8UH5100F14C2, H8UH5125J20C2, H8UH5140J20C2 MUF050W3C2, MUF075W3C2, MUF100W3C2, MUF125W5C2, MUF140W5C2 HL12H3TRC2, HL18H3TRC2, HL25H3TRC2, HL31H4TRC2, HL34H5TRC2 Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
- Page 37 Replacement Parts - H8UH5, MUF, HL (Natural Gas) Models -- H8UH5050B12C2, H8UH5075B12C2, H8UH5100F14C2, H8UH5125J20C2, H8UH5140J20C2 MUF050W3C2, MUF075W3C2, MUF100W3C2, MUF125W5C2, MUF140W5C2 HL12H3TRC2, HL18H3TRC2, HL25H3TRC2, HL31H4TRC2, HL34H5TRC2 Replacement part supplied will be current active part. For parts not listed, consult place of purchase.
- Page 38 Replacement Parts - H8UH5, MUF, HL (Natural Gas) Models -- H8UH5050B12C2, H8UH5075B12C2, H8UH5100F14C2, H8UH5125J20C2, H8UH5140J20C2 MUF050W3C2, MUF075W3C2, MUF100W3C2, MUF125W5C2, MUF140W5C2 HL12H3TRC2, HL18H3TRC2, HL25H3TRC2, HL31H4TRC2, HL34H5TRC2 Replacement part supplied will be current active part. For parts not listed, consult place of purchase.