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Johnson Controls LM8M/LMLM*MP manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    368261-UIM-A-0508 EFFICIENCY RATING CERTIFIED ISO 9001 Certified Quality Management System RESIDENTIAL GAS FURNACE WITH PSC MOT OR MODELS: TM8M/TMLM*MP , YM8M/YMLM*MP , CM8M/CMLM*MP , LM8M/LMLM*MP (80% Modulating Multi-position / Low NOx) INSTALLATION MANUAL LIST OF SECTIONS SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 2

    368261-UIM-A-0508 2 Johnson Controls Unitary Products SPECIFIC SAFETY RULES AND PRECAUTIONS 1. Only Natural gas or Propane (LP) ga s are approved for use with this furnace. 2. Install this furnace only in a location and position as specified in these instructions. 3. A gas-fired furnace for installation in a residential garage must be installed as [...]

  • Page 3

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 3 CODES AND ST AND ARDS Follow all national, local codes and standar ds in addition to this installa- tion manual. The installation must co mply with regulations of the serv- ing gas supplier , local building, heat ing, plumbing, and other codes. In absence of local codes, the installa tion must [...]

  • Page 4

    368261-UIM-A-0508 4 Johnson Controls Unitary Products FURNA CE LOCA TION AND CLEARANCES The furnace shall be locat ed using the following guid elines: 1. Where a minimum amount of air intake/vent piping and elbows will be required. 2. As centralized with the air distribution as possible. 3. Where adequate combusti on air will be available. 4. Where[...]

  • Page 5

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 5 DUCT FLANGES Four flanges are provided to attach ductwork to the furnace. These flanges are rotated down for shipment. In order to use the flanges, remove the screw holding an individual flange, rotate the flange so it is in the upward position and reinstall t he screw then repeat this for all [...]

  • Page 6

    368261-UIM-A-0508 6 Johnson Controls Unitary Products For horizontal left hand applications no conversion is required to an MC coil when used with a downflow/horiz ontal furnace. A mounting plate, supplied with every coil should al ways be installed on the side desig- nated as top side. See Figures 4 & 5. FURNACE ASSEMBL Y - PC SERIES COI LS Th[...]

  • Page 7

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 7 BOTT OM RETURN AN D A TT IC INST ALLA TIONS Bottom return applications normally pull return air through a base plat- form or return air plenu m. Be sure the return platform structure or return air plenum is suitable to support the weight of the fur nace. The internal bottom panel must be remove[...]

  • Page 8

    368261-UIM-A-0508 8 Johnson Controls Unitary Products SECTION III: FIL TE RS FIL TER INST AL LA TION All applications require the use of a field installed filter . All filters and mounting provision must be field supplied. Filters must be installed external to the furnace cabinet. DO NOT attempt to install filters inside the furnace. NOTES: 1. Air [...]

  • Page 9

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 9 HORIZONT AL APPLICA TION Horizontal Filters Any branch duct (rectangular or r ound duct) attached to the plenum must attach to the vertical plenum before the filter . The use of straps and / or supports is required to support the weight of the external filte r box. Downflow Filt ers Downflow fu[...]

  • Page 10

    368261-UIM-A-0508 10 Johnson Controls Unitary Products HIGH AL TITUDE NA TURAL GAS ORIFICE CONVERSION The National Fuel Gas Code requires that gas appliances installed above 2,000 feet elevation have thei r inputs de-rated by 4% per 1,000 feet above sea level. The modulating furnaces automatically de-rate for altitude by measuring the inducer blowe[...]

  • Page 11

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 11 SUPPL Y VOL T AGE CONNECTIONS 1. Provide a power supply separate from all other circuits. Install overcurrent protection and disconnect switch per local/national electrical codes. The switch shoul d be close to the unit for conve- nience in servicing. With the disconnect or fused switch in the[...]

  • Page 12

    368261-UIM-A-0508 12 Johnson Controls Unitary Products For additional connection diagrams for a ll UPG equipment refer to “Low V oltage System Wiring” document available online at www . upgnet.com in the Product Catalog Section. FIGURE 20: Thermostat Chart - Single S tage Air Conditio ner – V ar iable S peed or PSC Modulating Furnace HM1 Humi[...]

  • Page 13

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 13 FIGURE 21: Thermostat Chart - T wo St age Air Conditioner – V ariable Speed or PSC Modulating Furnace C 24 – Volt Comm on Y1 First Stage Co mp ressor Y2 Second St age Compre ssor G Fan *PP32U70124 THERMOSTAT AUX Auxiliary Hea t R 24 – Volt Hot (Heat XFMR) R 24 – Volt Hot (Cool XFMR) C [...]

  • Page 14

    368261-UIM-A-0508 14 Johnson Controls Unitary Products FIGURE 22: Thermostat Chart - T wo Stage Air Conditioner with Single S t age Ther mostat – V ariable Speed or PSC Modulating Furnace HM1 Humidistat Y Full Stage Compressor G Fan *PP11C70224 THERMOSTAT RH 24 – Vo lt Hot (Heat XFMR) RC 24 – Volt Hot (Cool XFMR) W Full Stage Heat Clipping Ju[...]

  • Page 15

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 15 FIGURE 23: Thermostat Chart - Single S tage Heat Pump – V ariable S peed or PSC Modulating Furnace C 24 – Volt Common R 24 – Volt Hot Y1 First Stage Co mp ressor O Reversing Valve Energized in Cool L Malfunction Ligh t G Fan *DP32H70124 THERMOSTAT W1 Second St age Aux. Hea t E Emergency [...]

  • Page 16

    368261-UIM-A-0508 16 Johnson Controls Unitary Products FIGURE 24: Thermostat Chart - Single S tage Heat Pump – V ariable S peed or PSC Modulating Furnace C 24 – Volt Comm on R 24 – Volt Hot Y1 First Stage Comp ressor O Reversing Valve Energized in Cool L Malfunction Ligh t G Fan *DP32H70124 THERMOSTAT W1 Second St a ge Aux. Hea t E Emergency [...]

  • Page 17

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 17 FIGURE 25: Thermostat Chart - T wo Stage Heat Pump – V ariable S peed or PSC Modulating Furnace O Reversing Valve Energized in Co ol C 24 – Vo lt Common R 24 – Volt Hot W1 OUT First Stage Heat W2 OUT Second Stage Heat Y2 OUT Second Stage Compressor Y1 Single Stage Compressor X/L Malfunct[...]

  • Page 18

    368261-UIM-A-0508 18 Johnson Controls Unitary Products ACCESSOR Y CONNECTIONS The furnace control will allow power- switchin g control of various acces- sories. ELECTRONIC AIR CLEANER CONNECTION T wo 1/4” (0.64 cm) spade terminals (EAC and NEUTRAL) for electronic air cleaner connections are located on the control board. The te rminals provide 1 1[...]

  • Page 19

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 19 An unconfined space is not less than 50 cu.ft (1.42 m 3 ) per 1,000 Btu/ hr (0.2928 kW) input rating for all of the appliances inst alled in that area. Rooms communicating directly with the space containing the appli- ances are considered part of the unconfined space, if openings are fur- nish[...]

  • Page 20

    368261-UIM-A-0508 20 Johnson Controls Unitary Products 2. One permanent openings, commencing within 12 in (30.5 mm)of the top of the enclosure shall be permitted where the equipment has clearances of at least 1 in (2.54 cm) from the side s and back and 6 in (15.24 cm) from the front of the appliance. The opening shall communicate directly with the [...]

  • Page 21

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 21 6. Remove the burner assembly . It sh ould be possible to swing the burner assembly out of the way without disconnecting the r emain- ing wires. 7. With the burner assembly out of the way , simply slide the N Ox screens out of the heat exchanger tubes and discar d the screens. 8. Replace all c[...]

  • Page 22

    368261-UIM-A-0508 22 Johnson Controls Unitary Products T ab le 10: Gas Rate (CU FT/HR) at Full Inpu t Seconds For 1 Revolution Size of T est Dial Seco nds For 1 Revolution Size of T est Dial 1 Cu Ft 2 Cu Ft 5 Cu Ft 1 Cu Ft 2 Cu Ft 5 Cu Ft 10 360 720 1800 55 65 131 327 1 1 327 655 1636 56 64 129 321 12 300 600 1500 57 63 126 316 13 277 555 1385 58 6[...]

  • Page 23

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 23 ADJUSTMENT OF MANI FOLD GAS PRESSURE * The gas line pressure MUST BE • 7” W .C. (1.74 kP A) for Natural Gas • 1 1” W .C. (2.74 kP A) for Propane (LP) Gas in order to obtain the BTU input specified on the rating plate and/or the nominal manifold pressure specifi ed in these instructions[...]

  • Page 24

    368261-UIM-A-0508 24 Johnson Controls Unitary Products ADJUSTMENT OF F AN CONTROL SETTINGS Cooling - The airflow delivered by the furnace during cooling operation can be adjusted to match the cooli ng capacity of the A/C condensing unit. This is done by moving the CO OL jumper on the control board to give the desired airflow . Do not mo ve the moto[...]

  • Page 25

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 25 PRESSURE CONTROLS Pressure Sensor - This furnace is equipped with a pressur e sensor in the burner compartment near the combustion blower . This sensor mon - itors combustion airflow through furnace and piping systems. If any of the conditions listed below are detec ted by the pressure sensor [...]

  • Page 26

    368261-UIM-A-0508 26 Johnson Controls Unitary Products Three Red Flashes - S tuck open pressure switch. This indicates that the pressure switch is open wh en it should be closed. This could be caused by a faulty combustion air bl ower , blocked vent pipe, blocked air intake pipe, blocked condensate drain, faulty pressure switch hose or a faulty pre[...]

  • Page 27

    368261-UIM-A-0508 Johnson Controls Unitary Produ cts 27 SECTION XI: REPL ACEMENT P ARTS LIST DESCRIPTION MOTOR MOTOR, DIRECT DRIVE BLOWER BLOWER, COMBUSTION ELECTRICAL CAP ACITOR, RUN SWITCH, LIMIT CONTROL, FURNACE IGNITER SENSOR, FLAME SWITCH, PRESSURE SWITCH, DOOR TRANSFORMER V AL VE, GAS CONTROL, TEMPERA TURE SENSOR, PRESSURE SENSOR, THERMISTOR [...]

  • Page 28

    Subject to change without notice. Printed in U.S.A. 368261-UIM-A-0508 Copyright © 2008 by Johnson Controls, Inc. All rights reserved. Supersedes: Nothing Johnson Contro ls Unit a r y Prod uc t s 5005 Y o rk Drive Norman, OK 73069 SECTION XII: W IRING DIAGRAM FIGURE 31: Wiring Diagram[...]