Johnson Controls WW-15 Installation Manual
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Johnson Controls WW-15 Installation Manual

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INSTALLATION
MANUAL
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . .6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .63
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .64
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .66
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
MODELS: WW-15, -20 & -25
284818-BIM-C-1008

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  • Page 1 GENERAL ........4 MODELS: WW-15, -20 & -25 SAFETY CONSIDERATIONS .

  • Page 2: Table Of Contents

    CHECKING SUPPLY AIR CFM..... . 54 MANIFOLD GAS PRESSURE ADJUSTMENT ..65 Johnson Controls Unitary Products...
  • Page 3 DRIVE (GAS HEAT) DOWNFLOW ....47 17 CHARGING CHART - WW-15 ..... . 53 24 WW-25 BLOWER PERFORMANCE - 25 TON STANDARD 18 CHARGING CHART - WW-20 .

  • Page 4: General

    Wear safety glasses and work gloves, and follow all • Technical Guide - 263414 safety codes. Use a quenching cloth and have a fire • General Installation - 284818 extinguisher available for all brazing operations. Johnson Controls Unitary Products...

  • Page 5: Renewal Parts

    Cau- tions are given to prevent equipment damage. Warn- ings are given to alert installer that personal injury and/ or equipment damage may result if installation proce- dure is not handled properly. Johnson Controls Unitary Products...

  • Page 6: Product Nomenclature

    M = Options 1, 2, 3, & 4 Z = Options 3, 4 & 5 Options 1 = Disconnect 4 = Smoke Detector R.A. 2 = Non-Pwr'd Conv. Outlet 5 = Pwr'd Conv. Outlet 3 = Smoke Detector S.A. Johnson Controls Unitary Products...

  • Page 7: Installation

    Unitary Products @ 1-877-UPG- LIMITATIONS SERV for guidance. Additional accessories may be needed for stable operation at temperatures These units must be installed in accordance with the below 30°F. following national and local safety codes: Johnson Controls Unitary Products...

  • Page 8: Location

    UP roof curb, gasketing must be applied to all surfaces that come in contact with the unit under- 6. Maintain level tolerance to 1/2 inch maximum side. across the entire length or width of the unit. Johnson Controls Unitary Products...

  • Page 9: Rigging And Handling

    CFM and static requirements of the 46” (20, 25 TON) FRONT job. They should NOT be sized to match the dimen- FIGURE 2 - CENTER OF GRAVITY sions of the duct connections on the unit. Johnson Controls Unitary Products...

  • Page 10: Fixed Outdoor Air Intake Damper

    MUST be trapped to provide proper drain- air access panel. Remove and discard the opening age. See Figure 4. cover and the covering over the hood mounting holes Johnson Controls Unitary Products...

  • Page 11: Compressors

    Two-inch filters are supplied with each unit, but units are replaced and properly positioned on the can be converted easily to four-inch filters. Filters must unit to maintain an airtight seal. always be installed ahead of the evaporator coil and Johnson Controls Unitary Products...
  • Page 12 o n o m i z e r d a m p e r s w h e n th e th e r m o s t a t s w i t c h e s to th e s e t - b a c k p o s i t i o n . T-STAT UNIT CONTROL BOARD ERMINAL BLOCK B1 FAC ORY OR FIELD GROUND SUPPLIED DISCONNEC HREE PHASE POWER SUPPLY FIGURE 5 - TYPICAL FIELD WIRING Johnson Controls Unitary Products...

  • Page 13: Thermostat

    A fused disconnect switch should be field provided for to Table 3 for minimum CFM limitations and to Tables 9 the unit. The switch must be separate from all other cir- thru 14 for electrical data. cuits. Wire entry at knockout openings require conduit Johnson Controls Unitary Products...

  • Page 14: Optional Gas Heat

    All units require a one-inch pipe connection at Maximum capacity of pipe in cubic feet of gas per hour. (Based upon the entrance fitting. a pressure drop of 0.3 inch water column and 0.6 specific gravity gas). Johnson Controls Unitary Products...

  • Page 15: Gas Connection

    Therefore, a special pipe nace. compound must be applied when wrought iron or steel pipe is used. Shellac base compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Clyde's or John Crane may be used. Johnson Controls Unitary Products...

  • Page 16: L.p. Units, Tanks And Piping

    2. The proper pressure regulation. (Two-stage regula- ing. Refer to Vent and Combustion Air Hood Figure 8. tion is recommended from the standpoint of both cost and efficiency.) Johnson Controls Unitary Products...

  • Page 17: Optional Economizer/Motorized Damper Rain Hood

    Loosen but do not remove the two panel latches. dance with the enthalpy and mixed air sensor inputs. Locate the economizer control module, where the fol- When the AQ signal exceeds it's setpoint setting and lowing adjustments will be made. Johnson Controls Unitary Products...

  • Page 18: Optional Bas-Ready Economizer Power Exhaust Damper Set Point Adjustment

    (field supplied) in the • IAQ - a 0-10 VDC analog input provided by a field- supply duct located at a point where constant pressure installed carbon dioxide sensor which monitors Johnson Controls Unitary Products...

  • Page 19: Factory-Installed Vfd

    If there is a call for the fan, the indoor blower with the use of a USB-to-RS485 converter, motor will run at full-speed while in the bypass mode. and a down-loaded personal computer or PDA Johnson Controls Unitary Products...

  • Page 20: Bas-Ready Vfd

    The opening pressure of the bypass valve is fully • LR '4' to UCB 'C' adjustable between 0 and 80 psig with a factory-setting of 60 psig. HGBP is standard on all units with VAV and optional with CV units. Johnson Controls Unitary Products...

  • Page 21: Enthalpy Setpoint Adjustment

    Damper Min. Position Screw Indoor Air Quality Max. Adjustment Screw Indoor Air Quality Indoor Air Quality Min. Adjustment Screw Free Cool Free Cooling LED Economizer Enthalpy Set Point Adjustment Screw FIGURE 10 - HONEYWELL ECONOMIZER CONTROL W7212 Johnson Controls Unitary Products...

  • Page 22: Optional Reclaim Coil Piping Connection

    If the coil has lost its holding charge, the reclaim coil must be leak-tested and any necessary repairs made before proceeding. Johnson Controls Unitary Products...

  • Page 23: Four And Six Point Loads

    NOTE: These weights are with economizer, economizer rain hood and high option heat (gas or electric). APPROXIMATE CENTER OF GRAVITY BACK CONDENSER COIL END (92") 47.5” (15, 20, 25 TON) 136.25” 45” (15 TON) 46” (20, 25 TON) FRONT FIGURE 12 - CENTER OF GRAVITY Johnson Controls Unitary Products...

  • Page 24: Physical Data

    WOOD SKID TABLE 8: SUPPLY FAN VFD WEIGHTS, IN LBS. SUPPLY FAN MOTOR 230V 460V 575V W/O MANUAL BYPASS 5.0 hp 7.5 hp 10.0 hp 15.0 hp W/MANUAL BYPASS 5.0 hp 7.5 hp 10.0 hp 15.0 hp Johnson Controls Unitary Products...

  • Page 25: Ww Electrical Data W/O Powered Convenience Outlet - Std Drive Motor

    18.0 21.7 50.6 15.5 12.1 36.0 43.3 69.3 54.0 65.0 80.1 72.0 86.6 101.7 None 39.9 18.0 17.3 39.9 12.1 10.3 36.0 34.6 56.2 54.0 52.0 64.8 72.0 69.3 82.2 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products...
  • Page 26 NOTE 1: HACR Type per NEC. ELECTRIC HEAT CORRECTION FACTORS VOLTAGE LIMITATIONS VOLTAGE NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER POWER SUPPLY MIN. MAX. 1.00 208/230-3-60 0.92 460-3-60 0.92 575-3-60 0.92 Utilization Range “A” in accordance with ARI Standard 110. Johnson Controls Unitary Products...

  • Page 27: Ww Electrical Data W/O Powered Convenience Outlet - High Static Drive Motor

    18.0 21.7 50.6 15.5 12.1 36.0 43.3 69.3 54.0 65.0 80.1 72.0 86.6 101.7 None 39.9 18.0 17.3 39.9 12.1 10.3 36.0 34.6 56.2 54.0 52.0 64.8 72.0 69.3 82.2 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products...
  • Page 28 NOTE 1: HACR Type per NEC. ELECTRIC HEAT CORRECTION FACTORS VOLTAGE LIMITATIONS VOLTAGE NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER POWER SUPPLY MIN. MAX. 1.00 208/230-3-60 0.92 460-3-60 0.92 575-3-60 0.92 Utilization Range “A” in accordance with ARI Standard 110. Johnson Controls Unitary Products...

  • Page 29: Ww Electrical Data W/O Powered Convenience Outlet - Low Static Drive

    NOTE 1: HACR Type per NEC. ELECTRIC HEAT CORRECTION FACTORS VOLTAGE LIMITATIONS VOLTAGE NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER POWER SUPPLY MIN. MAX. 1.00 208/230-3-60 0.92 460-3-60 0.92 575-3-60 0.92 Utilization Range “A” in accordance with ARI Standard 110. Johnson Controls Unitary Products...

  • Page 30: Ww Electrical Data W/Powered Convenience Outlet - Std Drive Motor

    18.0 21.7 55.6 15.5 12.1 36.0 43.3 75.5 54.0 65.0 86.3 72.0 86.6 108.0 None 43.9 18.0 17.3 43.9 12.1 10.3 36.0 34.6 61.2 54.0 52.0 69.8 72.0 69.3 87.2 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products...
  • Page 31 NOTE 1: HACR Type per NEC. ELECTRIC HEAT CORRECTION FACTORS VOLTAGE LIMITATIONS VOLTAGE NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER POWER SUPPLY MIN. MAX. 1.00 208/230-3-60 0.92 460-3-60 0.92 575-3-60 0.92 Utilization Range “A” in accordance with ARI Standard 110. Johnson Controls Unitary Products...

  • Page 32: Ww Electrical Data W/Powered Convenience Outlet - High Static Drive Motor

    18.0 21.7 55.6 15.5 12.1 36.0 43.3 75.5 54.0 65.0 86.3 72.0 86.6 108.0 None 43.9 18.0 17.3 43.9 12.1 10.3 36.0 34.6 61.2 54.0 52.0 69.8 72.0 69.3 87.2 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products...
  • Page 33 NOTE 1: HACR Type per NEC. ELECTRIC HEAT CORRECTION FACTORS VOLTAGE LIMITATIONS VOLTAGE NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER POWER SUPPLY MIN. MAX. 1.00 208/230-3-60 0.92 460-3-60 0.92 575-3-60 0.92 Utilization Range “A” in accordance with ARI Standard 110. Johnson Controls Unitary Products...

  • Page 34: Ww Electrical Data W/Powered Convenience Outlet - Low Static Drive

    NOTE 1: HACR Type per NEC. ELECTRIC HEAT CORRECTION FACTORS VOLTAGE LIMITATIONS VOLTAGE NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER POWER SUPPLY MIN. MAX. 1.00 208/230-3-60 0.92 460-3-60 0.92 575-3-60 0.92 Utilization Range “A” in accordance with ARI Standard 110. Johnson Controls Unitary Products...
  • Page 35 Opening in the bottom of the unit can be located by the slice in the insulation. NOTE: All entry holes should be field sealed to prevent rain water entry into the building. FIGURE 13 - DIMENSIONS 15, 20 & 25 TON Johnson Controls Unitary Products...
  • Page 36 Connect ductwork to the flanges on those panels. openings are closed with sheet metal covers except when the unit includes a power exhaust option. The covering consists of a heavy black paper composition. Replace the side supply and return air compartment panels. Johnson Controls Unitary Products...

  • Page 37: Unit Clearances And Rain Hood Dimensions

    Compartment) 36-5/8” 1“ CONDENSATE DRAIN 16-1/8” (Must be trapped) 5” 28-3/16” 92” REAR VIEW LH VIEW DETAIL “Y” UNIT WITH RAIN HOODS FIGURE 15 - UNIT CLEARANCES AND RAIN HOOD DIMENSIONS (15, 20 & 25 TON) Johnson Controls Unitary Products...

  • Page 38: Cfm, Static Pressure, And Power - Altitude And Temperature Corrections

    This value must be corrected for elevation. Example 2: A system, located at 5,000 feet of elevation, is to BHP at 5,000 ft = 3.2 x .832 = 2.66 deliver 6,000 CFM at a static pressure of 1.5". Use the unit Johnson Controls Unitary Products...

  • Page 39: Altitude/Temperature Conversion Factor

    284818-BIM-C-1008 Altitude/Temperature Conversion Factor 1.100 1.000 SEA LEVEL 1000 ft 2000 0.900 3000 4000 5000 0.800 6000 7000 8000 0.700 9000 10,000 0.600 TEMPERATURE (°F) FIGURE 16 - ALTITUDE/TEMPERATURE CONVERSION FACTOR Johnson Controls Unitary Products...
  • Page 40 284818-BIM-C-1008 TABLE 16: WW-15 BLOWER PERFORMANCE - 15 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM BHP CFM RPM 6476 955 3.65 4.38 6183 922 3.24 3.89 5911 889 2.88 3.46 5695 857 2.61...
  • Page 41 284818-BIM-C-1008 TABLE 17: WW-15 BLOWER PERFORMANCE - 15 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM BHP CFM RPM 6346 955 3.43 4.12 6059 922 3.05 3.66 5793 889 2.71 3.25 5581 857 2.46...
  • Page 42 284818-BIM-C-1008 TABLE 18: WW-15 BLOWER PERFORMANCE - 15 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM BHP CFM RPM 7898 1120 5.88 7.18 7577 1082 5.29 6.45 7322 1044 4.78 5.83 7014 1005 4.21...
  • Page 43 284818-BIM-C-1008 TABLE 19: WW-15 BLOWER PERFORMANCE - 15 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM BHP CFM RPM 7740 1120 5.53 6.75 7425 1082 4.97 6.06 7176 1044 4.49 5.48 6874 1005 3.95...
  • Page 44 5 HP motor 20-Ton Standard Drive, Cooling Only, Bottom Connection VP68 x BK110 10000 1 turn 2 turns 9000 3 turns 4 turns 8000 5 turns 6 turns 7000 6000 5000 4000 3000 External Static (" WC) Johnson Controls Unitary Products...
  • Page 45 5 HP motor 20-Ton Standard Drive, Gas Heat, Bottom Duct Connection VP68 x BK110 10000 1 turn 9000 2 turns 3 turns 4 turns 8000 5 turns 6 turns 7000 6000 5000 4000 3000 External Static Pressure (IWC) Johnson Controls Unitary Products...
  • Page 46 20-Ton High Static Drive, Cooling Only, Bottom Duct Connection VP68 x BK100 11000 10000 1 Turn 3 Turns 2 Turns 4 Turns 9000 5 Turns 6 Turns 8000 7000 6000 5000 4000 3000 External Static ("WC) Johnson Controls Unitary Products...
  • Page 47 20-Ton High Static Drive, Gas Heat, Bottom Duct Connection VP68 x BK100 11000 10000 1 Turn 2 Turns 3 Turns 9000 4 Turns 5 Turns 6 Turns 8000 7000 6000 5000 4000 3000 External Static ("WC) Johnson Controls Unitary Products...
  • Page 48 7.5 HP motor 25-Ton Standard Drive, Cooling Only, Bottom Duct Connection 1VP65 & B5V94 12000 1 Turn 11000 2 Turns 3 Turns 10000 4 Turns 5 Turns 9000 6 Turns 8000 7000 6000 5000 External Static ("WC) Johnson Controls Unitary Products...
  • Page 49 7.5 HP motor 25-Ton Standard Drive, Gas Heat, Bottom Duct Connection 1VP65 & B5V94 12000 1 Turn 11000 2 Turns 3 Turns 10000 4 Turns 5 Turns 9000 6 Turns 8000 7000 6000 5000 External Static ("WC) Johnson Controls Unitary Products...
  • Page 50 10 HP motor 7.5 HP motor 25-Ton High-Static Drive, Cooling Only, Bottom Duct Connection 1VP71& B5V94 13000 1 Turn 12000 2 Turns 3 Turns 4 Turns 11000 5 Turns 6 Turns 10000 9000 8000 7000 External Static ("WC) Johnson Controls Unitary Products...
  • Page 51 10 HP motor 7.5 HP motor 25-Ton High-Static Drive, Gas Heat, Bottom Duct Connection 1VP71& B5V94 13000 12000 1 Turn 2 Turns 3 Turns 11000 4 Turns 5 Turns 6 Turns 10000 9000 8000 7000 External Static ("WC) Johnson Controls Unitary Products...

  • Page 52: Static Resistances

    All motors have a nominal speed of 1800 RPM, a 1.15 service factor and a solid base. They can operate to the limit of their service factor because they are located in the moving air, upstream of any heating device. Do NOT close this pulley below 1 turn open. Johnson Controls Unitary Products...
  • Page 53 2. This chart is applicable to unit with the TXV's left to the factory setting. If the TXV's have been adjusted in the field, the charging chart may no longer apply. FIGURE 17 - CHARGING CHART - WW-15 20 Ton Charging Chart (ºF)

  • Page 54: Phasing

    The RPM of the supply air blower will depend on the units. Refer to the Blower Motor and Drive Data required CFM, the unit accessories or options and the Table 30. static resistances of both the supply and the return air Johnson Controls Unitary Products...

  • Page 55: Air Balance

    4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 equipment installer. NOMINAL AIR FLOW (SCFM) FIGURE 21 - PRESSURE DROP ACROSS A DRY INDOOR COIL VS SUPPLY AIR CFM FOR ALL UNIT TONNAGES Johnson Controls Unitary Products...

  • Page 56: Operation

    By setting the room thermostat fan switch to "ON," the Once the thermostat has been satisfied, it will de-ener- supply air blower will operate continuously. gize Y1 and Y2. If the compressors have satisfied their minimum run times, the compressors and condenser Johnson Controls Unitary Products...

  • Page 57: Economizer With Single Enthalpy Sensor

    If at anytime the outdoor air temperature rises above air and return air, whichever has the lowest enthalpy the First-Stage SAT Control setpoint plus 5 °F, while value, to provide maximum operating efficiency. Johnson Controls Unitary Products...

  • Page 58: Economizer With Optional Vav Blower With Power Exhaust

    If the call for cooling is still present COOLING OPERATION ERRORS at the conclusion of the ASCD, the UCB will re-ener- gize the halted compressor. Each cooling system is monitored for operation outside of the intended parameters. Errors are handled as Johnson Controls Unitary Products...

  • Page 59: Low Ambient Cooling

    MUST use a two-stage thermostat:). The other refrigerant system will continue in operation unless it is affected by the fault as well. Upon a call for heat by the thermostat, the heater contactor (6M) will be energized. After completing Johnson Controls Unitary Products...

  • Page 60: Heating Operation Errors

    This control is located inside the heater compart- temperature within the conditioned space. Refer to ment and is set to open at the temperature indi- Table 32 for the required heat anticipator setting. cated in the Limit Control Setting Table 31. It resets Johnson Controls Unitary Products...

  • Page 61: Gas Heating Sequence Of Operations

    The UCB will de-energize the "GV1" to allow a flow of gas to only the first stage carry- blower motor. over tube. Only after the pilot flame has been ignited Johnson Controls Unitary Products...

  • Page 62: Gas Heating Operation Errors

    24V power is removed from the controls either voltage or "W1" is lost, the indoor blower is forced on at the unit or by resetting the room thermostat. for the length of the fan off delay for heating. Johnson Controls Unitary Products...

  • Page 63: Flash Codes

    3. First stage compressors will energize after the This resets any flash codes. built-in time delay (five minutes). 4. The second stage of the thermostat will energize second stage compressor if needed. Johnson Controls Unitary Products...

  • Page 64: Post Start Check List

    5. Set room thermostat to desired temperature. (If thermostat “set” temperature is above room tem- perature, pilot burner ignition will occur and, after an interval to prove pilot flame, main burners will ignite). FIGURE 24 - TYPICAL GAS VALVES Johnson Controls Unitary Products...

  • Page 65: Manifold Gas Pressure Adjustment

    Rate - Cubic Feet Per Hour Table 35. MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF ALL ELECTRIC POWER TO THE UNIT. If the actual input is not within 5% of the furnace rating (with allowance being made for the permissible range Johnson Controls Unitary Products...

  • Page 66: Adjustment Of Temperature Rise

    Step 3. rise. Refer to the Blower Motor and Drive Data Table 30. 2. If the blower motor runs with the fan switch in the ON position but will not run after the first compres- Johnson Controls Unitary Products...
  • Page 67 R and G with the fan switch in the ON posi- tion and in the AUTO position during operation for loose wiring between C1 and the compressor calls), b. proper wiring between the room thermostat contactor. Johnson Controls Unitary Products...
  • Page 68 Y1 “ECON” terminal. If 24 volts is not present, 1. If installed, check the position of the economizer check for loose wiring from the Y1 “OUT” terminal blades. If the blades are open, the economizer is Johnson Controls Unitary Products...
  • Page 69 UCB ter- (the room thermostat fan switch is in the “AUTO” posi- minals, e.g. if LPS2 has opened, there will be 24 tion). volts of potential between the LPS2 terminals. Johnson Controls Unitary Products...
  • Page 70 Mate-N-Locks and jumper between the WHITE none of the protection switches have opened, the and YELLOW wires of the UCB’s Mate-N-Lock UCB may have locked out the compressor for plug. repeat trips. The UCB should be flashing a code. If Johnson Controls Unitary Products...

  • Page 71: Gas Heat Troubleshooting Guide

    If it is hot, the motor may be off on inherent protec- tion. Cancel any thermostat calls and set the fan switch to “AUTO”, wait for the internal overload to reset. Test again when cool. Johnson Controls Unitary Products...

  • Page 72: Shut-Off

    On calls for heating, the supply air blower operates but attached to the (TDR) and with a VOM, check for the draft motor does not (the room thermostat fan continuity across contacts 1 and 2. If none is found, switch is in the “AUTO” position). Johnson Controls Unitary Products...
  • Page 73 The ignitor sparks at the pilot burner but the pilot does not ignite and a gas odor is detected at the draft motor 2. Check the main burner orifices for obstruction and outlet. alignment. Removal procedure is described in Johnson Controls Unitary Products...

  • Page 74: Unit Control Board Flash Codes

    11 Flashes Flashing Cooling 12 Flashes Unit Locked Out due to Fan Overload Switch Failure 13 Flashes Flashing Compressor Held Off due to Low Voltage 14 Flashes EEPROM Storage Failure No Power or Control Failure Non-alarm condition. Johnson Controls Unitary Products...

  • Page 75: Option Byte Setup

    LED will flash a few times and then normal display While in either Setup mode, if no buttons are NOTE: will resume. pushed for 60 seconds, the display will revert to its normal display, exiting the Option Setup Johnson Controls Unitary Products...

  • Page 76: Optional Vav Control Board Flash Codes

    15 Flashes Dirty Filter Switch No Power or Control Failure Subject to change without notice. Printed in U.S.A. 284818-BIM-C-1008 Copyright © 2008 by Johnson Controls, Inc. All rights reserved. Supersedes: 284818-BIM-B-0708 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...

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