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INSTALLATION
MANUAL
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . . 58
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
See following pages 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 damage may
result if installation procedure is not handled properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
MagnaDRY™
SINGLE PACKAGE AIR CONDITIONERS AND
SINGLE PACKAGE GAS/ELECTRIC UNITS
DK-07, -10 and -12
Tested in accordance with:
DK-07 and -10
DK-12
335224-BIM-B-1208
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Table of Contents
Troubleshooting
Related Manuals for York MagnaDRY DK-07 Series
Summary of Contents for York MagnaDRY DK-07 Series
- Page 1 INSTALLATION MagnaDRY™ MANUAL SINGLE PACKAGE AIR CONDITIONERS AND SINGLE PACKAGE GAS/ELECTRIC UNITS CONTENTS DK-07, -10 and -12 GENERAL ........4 SAFETY CONSIDERATIONS .
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Page 2: Table Of Contents
335224-BIM-B-1208 TABLE OF CONTENTS GENERAL ........4 HIGH-PRESSURE LIMIT SWITCH . - Page 3 335224-BIM-B-1208 LIST OF FIGURES Fig. # Pg. # Fig. # Pg. # 1 UNIT SHIPPING BRACKET ......7 24 FIELD WIRING DISCONNECT - COOLING UNIT 2 CONDENSER COVERING .
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Page 4: General
335224-BIM-B-1208 GENERAL MagnaDRY™ units are single package air conditioners with optional gas heating designed for outdoor installation on a rooftop or slab and for non-residential use. These units can If the information in this manual is not followed be equipped with factory or field installed electric heaters for exactly, a fire or explosion may result causing prop- heating applications. -
Page 5: Reference
335224-BIM-B-1208 REFERENCE APPROVALS Additional information is available in the following reference Design certified by CSA as follows: forms: For use as a cooling only unit, cooling unit with supple- • Technical Guide - DK-07 thru -12, 344591 mental electric heat or a forced air furnace. For outdoor installation only. -
Page 6: Nomenclature
335224-BIM-B-1208 NOMENCLATURE 7.5-12.5 Ton Single Package Model Number Nomenclature D K -10 N18 A T A AA 3 0 1 2 4 A Product Category Product Style D = A/C, Single Pkg., R-410A A = Style A B = Style B Product Identifier Configuration Options (not required for all units) These four digits will not be assigned until a quote is requested, or an order placed. -
Page 7: Installation
335224-BIM-B-1208 INSTALLATION Turn each bracket toward the ground and the protective plywood covering will drop to the ground. INSTALLATION SAFETY INFORMATION Remove the condenser coil external protective covering Read these instructions before continuing this appliance prior to operation. installation. This is an outdoor combination heating and cool- ing unit. -
Page 8: Limitations
335224-BIM-B-1208 In Canada: Canadian Electrical Code, CSA C22.1 This product must be installed in strict compliance Installation Codes, CSA - B149.1. with the enclosed installation instructions and any applicable local, state and national codes including, Local plumbing and waste water codes, and but not limited to, building, electrical, and mechani- cal codes. -
Page 9: Magnadry™ Dk-07 & -10 Component Location
335224-BIM-B-1208 “Simplicity”™ Control Board w/ Screw Connector for T-stat Filter Access Terminal Block Disconnect Location Filter-Drier (Solid Core) Wiring and Network (2” Filters) for Hi-Voltage (Optional Disconnect Switch) Connection Connection Condenser Section Second model nameplate inside hinged access Belt-Drive panel Blower Motor Dual stage cooling for... -
Page 10: Magnadry™ Dk-12 Component Location
335224-BIM-B-1208 Simplicity™ Control Disconnect Filter access board w/screw location (optional (2" throw-away) Second model connectors for T-stat disconnect switch) Filter drier (solid core) nameplate inside wiring and Network hinged access panel Connection Condenser Section Dual stage cooling Belt-drive blower for maximum motor comfort Slide out motor... -
Page 11: Location
If a unit is to be installed on a roof curb other than a Wet Bulb Temperature (°F) of Air on YORK roof curb, gasketing must be applied to all Evaporator Coil surfaces that come in contact with the unit under- side. -
Page 12: Dk-12 Unit 4 Point Load
335224-BIM-B-1208 TABLE 3: UNIT WEIGHTS Model Shipping Weight (lb.) Operating Weight (lb.) DK-07 1163 1148 DK-10 1277 1262 DK-12 1560 1545 w/Econ. w/ PE w/Elec. Heat † w/Gas Heat 54 kW heater. †. 8 Tube Heat Exchanger. FRONT TABLE 4: 4 POINT LOAD WEIGHT LEFT Location (lbs.) Model... -
Page 13: Clearances
335224-BIM-B-1208 CLEARANCES All units require particular clearances for proper operation and service. Installer must make provisions for adequate combus- Excessive exposure to contaminated combustion air tion and ventilation air in accordance with section 5.3 of Air for will result in safety and performance related prob- Combustion and Ventilation of the National Fuel Gas Code, lems. -
Page 14: 10 Unit Dimensions
335224-BIM-B-1208 30-11/32 See Detail 50-3/4 Control Power Entry Entry Ø 7/8 Ø 2-1/2 4-1/4 Power Entry Ø 2-1/2 11-1/2 Convenience Power Outlet For Baserail Entry Dimensions Ø 7/8 FRONT See Detail B 17-3/16 For Drain 30-3/16 Dimensions 24-3/16 6-3/16 See Detail C LEFT FIGURE 12 - DK-07 &... -
Page 15: Bottom Duct Openings (From Above)
335224-BIM-B-1208 TABLE 6: UNIT CLEARANCES DETAIL B 2 - 3 / 8 Right 72” 12” † Left 36” 36” Front 3 - 3 / 4 ‡ 36” 0” Rear Bottom Units must be installed outdoors. Overhanging struc- ture or shrubs should not obstruct condenser air dis- charge outlet. -
Page 16: 10 Rear Duct Dimensions
335224-BIM-B-1208 18-1/4 Dot Plugs Return Supply 18-1/4 2-31/32 5-5/32 31-11/16 FIGURE 15 - DK-07 & -10 REAR DUCT DIMENSIONS 18-1/4 Plugs Return 28-1/4 Supply 18-1/4 18-1/16 2-31/32 28-1/4 31-11/16 5-5/32 FIGURE 16 - DK-12 REAR DUCT DIMENSIONS Johnson Controls Unitary Products... -
Page 17: Ductwork
335224-BIM-B-1208 DUCTWORK DUCT COVERS Units are shipped with the side duct openings covered and a Ductwork should be designed and sized according to the covering over the bottom of the unit. For bottom duct applica- methods in Manual D of the Air Conditioning Contractors of tion, no duct cover changes are necessary. -
Page 18: Condensate Drain
335224-BIM-B-1208 CONDENSATE DRAIN The side condensate drain is reversible and maybe re-ori- ented to the rear of the cabinet to facilitate condensate pip- ing. A condensate drain connection is available through the When fastening ductwork to side duct flanges on base pan for piping inside the roof curb. -
Page 19: Thermostat Wiring
335224-BIM-B-1208 THERMOSTAT WIRING A disconnect must be utilized for these units. Factory installed disconnects are available. If installing a disconnect The thermostat should be located on an inside wall approxi- (field supplied or UP supplied accessory), refer to Figures 4 mately 56 inch above the floor where it will not be subject to and 5 for the recommended mounting location. -
Page 20: Typical Low Voltage Field Wiring
335224-BIM-B-1208 THERMOSTAT ( RCB ) TERMINALS REHEAT CONTROL BOARD 208/230-3-60 and 380/415-3-50 units control trans- formers are factory wired for 230v and 415v power supply respectively. Change tap on transformer for 208-3-60 or 380-3-50 operation. See unit wiring dia- TERMINAL BLOCK gram. -
Page 21: Field Wiring Disconnect - Cooling Unit With/Without Electric Heat
335224-BIM-B-1208 TERMINAL BLOCK TB1 FACTORY OR FIELD SUPPLIED DISCONNECT GROUND THREE PHASE POWER SUPPLY FIGURE 24 - FIELD WIRING DISCONNECT - COOLING UNIT WITH/WITHOUT ELECTRIC HEAT CONTACTOR 1M FACTORY OR FIELD SUPPLIED DISCONNECT GROUND THREE PHASE POWER SUPPLY FIGURE 25 - FIELD WIRING DISCONNECT-COOLING UNIT WITH GAS HEAT Johnson Controls Unitary Products... -
Page 22: Electrical Data - Dk-07 Without Powered Convenience Outlet
335224-BIM-B-1208 TABLE 8: ELECTRICAL DATA - DK-07 WITHOUT POWERED CONVENIENCE OUTLET Max Fuse Size Supply Min. Circuit OD Fan w/Power Fuse* w/Power Compressors Blower Conv Ampacity Motors Electric Heater Actual Heater Exhaust Size Exhaust Voltage Motor FLA Motor Outlet (Amps) Model No. -
Page 23: Electrical Data - Dk-10 W/O Pwrd Convenience Outlet
335224-BIM-B-1208 TABLE 10: ELECTRICAL DATA - DK-10 W/O PWRD CONVENIENCE OUTLET Max Fuse Size Supply Min. Circuit OD Fan w/Power Fuse* w/Power Compressors Blower Conv Ampacity Motors Electric Heater Actual Heater Exhaust Size Exhaust Voltage Motor FLA Motor Outlet (Amps) Model No. -
Page 24: Electrical Data - Dk-12 W/O Pwrd Convenience Outlet
335224-BIM-B-1208 TABLE 12: ELECTRICAL DATA - DK-12 W/O PWRD CONVENIENCE OUTLET Max Fuse Size Supply Min. Circuit OD Fan w/Power Fuse* w/Power Compressors Blower Conv Ampacity Motors Electric Heater Actual Heater Exhaust Size Exhaust Voltage Motor FLA Motor Outlet (Amps) Model No. -
Page 25: Optional Electric Heat
335224-BIM-B-1208 TABLE 14: PHYSICAL DATA Models Component Blower, Centrifugal (Dia. X Wd. In.) 15 x 15 15 x 15 15 x 15 Evaporator Motor, Standard (HP) 1-1/2 Blower Motor, Optional (HP) Rows Fins per Inch Evaporator Coil Height (in.) Face Area (ft.2) 10.6 13.2 13.2... -
Page 26: Optional Gas Heat
335224-BIM-B-1208 OPTIONAL GAS HEAT These gas-fired heaters have aluminized-steel or optional stainless steel, tubular heat exchangers with spark ignition. OPTIONAL COIL TABLE 16: GAS APPLICATION DATA GUARD Temp Rise SHOWN Unit Opt. Input (MBH) Output (MBH) (°F) 15-45 30-60 20-50 30-60 10-40 20-50... -
Page 27: Gas Connection
335224-BIM-B-1208 GAS CONNECTION The gas supply line can be routed within the space and roof curb, exiting through the unit’s basepan. Refer to Figure 14 for the gas piping inlet location. Typical supply piping FIRE OR EXPLOSION HAZARD arrangements are shown in Figures 26 and 27. All pipe nip- Failure to follow the safety warning exactly could ples, fittings, and the gas cock are field supplied or may be result in serious injury, death or property damage. -
Page 28: Vent And Combustion Air
335224-BIM-B-1208 For satisfactory operation, LP gas pressure must be 10.5 OPTIONS/ACCESSORIES inch W.C. at the unit under full load. Maintaining proper gas pressure depends on three main factors: ELECTRIC HEAT The vaporization rate which depends on the temperature Electric heaters are available as factory-installed options or of the liquid and the “wetted surface”... -
Page 29: Rain Hood
335224-BIM-B-1208 RAIN HOOD • For a single enthalpy operation carefully turn the set point adjusting screw (found on the damper control mod- All of the hood components, including the filters, the gasket- ule) to the "A", "B", "C" or "D" setting corresponding to ing and the hardware for assembling, are packaged and the lettered curve of the Enthalpy Set Point Adjustment located between the condenser coil section and the main unit... -
Page 30: Enthalpy Set Point Chart
335224-BIM-B-1208 CONTROL POINT CONTROL APPROX. CURVE (29) (32) (35) (38) (41) (43) AT 50% RH 73 (23) 70 (21) (27) 67 (19) 63 (17) (24) (21) (18) (16) (13) (10) (24) (27) (41) (43) (10) (13) (16) (18) (21) (29) (32) (35) (38) -
Page 31: Phasing
335224-BIM-B-1208 PHASING MagnaDRY™ DK units are properly phased from the factory. If the unit does not start up, the electrical connection to the unit may be misphased. If unit is equipped with a Phase Mon- itor check the phase monitor for a Red LED, indicating a mis- phase. -
Page 32: Blower Performance Dk-07 Side Flow
335224-BIM-B-1208 TABLE 19: BLOWER PERFORMANCE DK-07 SIDE FLOW DK-07 Standard Drive Assembly (Side Flow) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP ---- ---- ---- ----... -
Page 33: Blower Performance Dk-07 Side Flow Economizer
335224-BIM-B-1208 TABLE 20: BLOWER PERFORMANCE DK-07 SIDE FLOW ECONOMIZER DK-07 Standard Drive Assembly (Side Flow) (100% Return Economizer) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.3 3886 846 1588 1.70 3655 807 1408 1.51 3388 774... -
Page 34: Blower Performance Dk-07 Down Flow
335224-BIM-B-1208 TABLE 21: BLOWER PERFORMANCE DK-07 DOWN FLOW DK-07 Standard Drive Assembly (Down Flow) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP ---- ---- ---- ----... -
Page 35: Blower Performance Dk-07 Down Flow
335224-BIM-B-1208 TABLE 22: BLOWER PERFORMANCE DK-07 DOWN FLOW ECONOMIZER DK-07 Optional Drive Assembly (Down Flow) (100% Return Economizer) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP ---- ---- ----... -
Page 36: Blower Performance Dk-10 Side Flow
335224-BIM-B-1208 TABLE 23: BLOWER PERFORMANCE DK-10 SIDE FLOW DK-10 Standard Drive Assembly (Side Flow) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.3 ---- ---- ---- ---- ---- ---- ----... -
Page 37: Blower Performance Dk-10 Side Flow Economizer
335224-BIM-B-1208 TABLE 24: BLOWER PERFORMANCE DK-10 SIDE FLOW ECONOMIZER DK-10 Standard Drive Assembly (Side Flow) (100% Return Economizer) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.3 ---- ---- ---- ---- ---- ----... -
Page 38: Blower Performance Dk-10 Down Flow
335224-BIM-B-1208 TABLE 25: BLOWER PERFORMANCE DK-10 DOWN FLOW DK-10 Standard Drive Assembly (Down Flow) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.2 4755 914 2162 2.32 4436 875 1964 2.11 4154 838 1739 1.87 3799 800... -
Page 39: Blower Performance Dk-10 Down Flow Economizer
335224-BIM-B-1208 TABLE 26: BLOWER PERFORMANCE DK-10 DOWN FLOW ECONOMIZER DK-10 Standard Drive Assembly (Down Flow) (100% Return Economizer) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.2 4461 915 2037 2.19 4050 878 1801 1.93 3721 840... -
Page 40: Blower Performance Dk-12 Side Flow
335224-BIM-B-1208 TABLE 27: BLOWER PERFORMANCE DK-12 SIDE FLOW DK-12 Standard Drive Assembly (Side Flow) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.5 ---- ---- ---- ----... -
Page 41: Blower Performance Dk-12 Side Flow Economizer
335224-BIM-B-1208 TABLE 28: BLOWER PERFORMANCE DK-12 SIDE FLOW ECONOMIZER DK-12 Standard Drive Assembly (Side Flow) (100% Return Economizer) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.4 ---- ---- ---- ---- ---- ----... -
Page 42: Blower Performance Dk-12 Down Flow
335224-BIM-B-1208 TABLE 29: BLOWER PERFORMANCE DK-12 DOWN FLOW DK-12 Standard Drive Assembly (Down Flow) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP ---- ---- ---- ----... -
Page 43: Blower Performance Dk-12 Down Flow Economizer
335224-BIM-B-1208 TABLE 30: BLOWER PERFORMANCE DK-12 DOWN FLOW ECONOMIZER DK-12 Standard Drive Assembly (Down Flow) (100% Return Economizer) ESP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP CFM RPM WATT BHP 0.3 ---- ---- ---- ---- ---- ----... -
Page 44: Air Balance
335224-BIM-B-1208 TABLE 32: POWER EXHAUST SPECIFICATIONS MOTOR ELECTRICAL POWER EXHAUST FUSE CFM @ VOLT PHASE MODEL SIZE 0.1 ESP 2PE0473125 208/230 24.9 1075 2PE0473146 0.75 3,800 2PE0473158 1050 Motors are multi-tapped and factory-wired for high speed. AIR BALANCE Start the supply air blower motor. Adjust the resistances in both the supply and the return air duct systems to balance the air distribution throughout the conditioned space. -
Page 45: Checking Air Quantity
335224-BIM-B-1208 CHECKING AIR QUANTITY METHOD ONE METHOD TWO Remove the dot plugs from the duct panel (for location of Drill two 5/16 inch holes, one in the return air duct as the dot plugs see Figures 15 and 16). close to the inlet of the unit as possible, and another in the supply air duct as close to the outlet of the unit as Insert eight-inches of 1/4 inch metal tubing into the air- possible. -
Page 46: Dry Coil Delta P
335224-BIM-B-1208 MagnaDRY™ Units Indoor Coil Pressure Drop vs. Airflow 0.65 0.55 DK-07 0.45 DK-10 & DK-12 0.35 0.25 2200 3200 4200 5200 6200 Volumetric Flow Rate (cfm) 100% Return Economizer No Economizer FIGURE 31 - DRY COIL DELTA P Johnson Controls Unitary Products... -
Page 47: Supply Air Drive Adjustment
335224-BIM-B-1208 SUPPLY AIR DRIVE ADJUSTMENT EXAMPLE A 12.5 ton unit was selected to deliver 4,000 CFM with a 3 HP motor, but the unit is delivering 3,800 CFM. The variable pitch motor sheave is set at 2 turns open. Before making any blower speed changes review Use the equation to determine the required DD for the new the installation for any installation errors, leaks or motor sheave,... -
Page 48: Operation
335224-BIM-B-1208 TABLE 33: ADDITIONAL STATIC RESISTANCE Electric Heat KW Gas Heat 2300 0.08 0.07 0.08 0.09 0.10 0.13 2500 0.09 0.08 0.09 0.10 0.11 0.14 2700 0.11 0.09 0.10 0.12 0.13 0.16 2900 0.12 0.10 0.11 0.13 0.14 0.18 3100 0.14 0.12 0.13... -
Page 49: Cooling Sequence Of Operation
335224-BIM-B-1208 COOLING SEQUENCE OF OPERATION ECONOMIZER WITH SINGLE ENTHALPY SENSOR - When the room thermostat calls for "first-stage" cooling, the CONTINUOUS BLOWER low voltage control circuit from "R" to "G" and "Y1" is com- pleted. The UCB energizes the blower motor (if the fan switch By setting the room thermostat fan switch to "ON,"... -
Page 50: Cooling Operation Errors
335224-BIM-B-1208 the "R" to "G" circuit is opened, the damper spring returns Should a freezestat open three times within two hours of fully closed. operation, the UCB will lock-out the associated compressor and flash a code (Table 41). If the other compressor is inac- COOLING OPERATION ERRORS tive, the condenser fans will be de-energized. -
Page 51: Compressor Protection
335224-BIM-B-1208 COMPRESSOR PROTECTION When the room thermostat calls for second stage cooling, the RCB senses a signal through "Y1" & "Y2" and engages circuit #1 and circuit #2 in cooling mode. In addition to the external pressure switches, the compres- sors also have inherent (internal) protection. -
Page 52: Reheat Control Board
335224-BIM-B-1208 HGRR DEHUMIDISTAT MODE HARNESS SELECTION CONNECTION JUMPER FIGURE 32 - REHEAT CONTROL BOARD Johnson Controls Unitary Products... -
Page 53: And Dk-10 Reheat Controls
335224-BIM-B-1208 eheat Solenoid 1 eheat Solenoid 3 eheat Solenoid 2 Unit Control Board eheat Terminal Block eheat Control eheat Board elay Dehumidistat Terminal FIGURE 33 - DK-07 AND DK-10 REHEAT CONTROLS Johnson Controls Unitary Products... -
Page 54: Reheat Controls
335224-BIM-B-1208 eheat eheat Pressure Solenoid 1 Switch eheat Solenoid 3 eheat Solenoid 2 eheat elay Unit Control Board eheat Terminal Block eheat Control Board Dehumidistat Terminal FIGURE 34 - DK-12 REHEAT CONTROLS Johnson Controls Unitary Products... -
Page 55: Electric Heating Sequence Of Operations
335224-BIM-B-1208 ELECTRIC HEATING SEQUENCE OF OPERATIONS TABLE 35: ELECTRIC HEAT LIMIT SETTING The following sequence describes the operation of the elec- HEATER LIMIT SWITCH UNIT VOLTAGE tric heat section. OPENS °F Two-stage heating: -07, -10, -12 Upon a call for first stage heat by the thermostat, the -07, -10, -12 208/230 heater relay (RA) will be energized. -
Page 56: Gas Heating Sequence Of Operations
335224-BIM-B-1208 RETRY OPERATION TABLE 36: ELECTRIC HEAT ANTICIPATOR SETPOINTS When a flame is lost or is not detected during an attempt to achieve ignition, a retry operation occurs. A 30-second purge SETTING, AMPS is performed between ignition attempts. If the unit fails after three ignition attempts, the furnace is locked-out for one hour. -
Page 57: Gas Valve
335224-BIM-B-1208 GAS VALVE TABLE 37: GAS HEAT LIMIT CONTROL SETTINGS The UCB and ICB continuously monitor the GV. # of HX Tubes Main Limit Setting 215°F If the ICB senses voltage at the GV when not requested, the 195°F ICB will energize the draft motor. The ICB will not operate the furnace until voltage is no longer sensed at the GV. -
Page 58: Start-Up (Cooling)
335224-BIM-B-1208 Set the room thermostat setting to lower than the room TABLE 38: GAS HEAT ANTICIPATOR SETPOINTS temperature. SETTING, AMPS First stage compressors will energize after the built-in time delay (five minutes). 0.65 The second stage of the thermostat will energize second stage compressor if needed. -
Page 59: Shut Down
335224-BIM-B-1208 Turn on power to the unit. Set thermostat to call for second stage heat and start fur- nace. FIRE OR EXPLOSION HAZARD Failure to follow the safety warning exactly could If necessary, using a screwdriver, turn the second stage result in serious injury, death or property damage. -
Page 60: Gas Rate Cubic Feet Per Hour
335224-BIM-B-1208 Using the number of seconds it takes for one revolution TABLE 40: GAS RATE CUBIC FEET PER HOUR of the dial, calculate the cubic feet of gas consumed per Seconds Size of Test Dial hour. (See example below). for One 1/2 cu. -
Page 61: Adjustment Of Temperature Rise
335224-BIM-B-1208 ADJUSTMENT OF TEMPERATURE RISE To service burners, complete step 4. The temperature rise (the difference of temperature between Remove the heat shield on top of the manifold supports. the return air and the heated air from the furnace) must lie Burners are now accessible for inspection and/or within the range shown on the CSA rating plate and the data replacement. -
Page 62: Charging Chart Dk-07
335224-BIM-B-1208 DK-07 Charging Chart 115°F Outdoor 105°F Outdoor 95°F Outdoor 85°F Outdoor 75°F Outdoor 65°F Outdoor Suction Pressure (psig) FIGURE 37: CHARGING CHART DK-07 DK-10 CHARGING CHART 115°F Outdoor 105°F Outdoor 95°F Outdoor 85°F Outdoor 75°F Outdoor 65°F Outdoor Suction Pressure (psig) FIGURE 38: CHARGING CHART DK-10 Johnson Controls Unitary Products... -
Page 63: Troubleshooting
335224-BIM-B-1208 DK-12 CHARGING CHART 115°F Outdoor 105°F Outdoor 95°F Outdoor 85°F Outdoor 75°F Outdoor 65°F Outdoor Suction Pressure (psig) FIGURE 39: CHARGING CHART DK-12 TROUBLESHOOTING Troubleshooting of components may require open- ing the electrical control box with the power con- nected to the unit. -
Page 64: Flash Codes
335224-BIM-B-1208 FLASH CODES LEDs equates to the number of flashes, and is shown in the table. Pressing and releasing the LAST ERROR button on the UCB can check the alarm history. The UCB will cycle Various flash codes are utilized by the unit control board through the last five (5) alarms, most recent to oldest, (UCB) to aid in troubleshooting. -
Page 65: Unit Control Board Option Setup
335224-BIM-B-1208 Check Alarm History Reset All ASCDs for One Cycle Non Alarm Condition Green LED Flashing Current Alarm Flashed Red LED FIGURE 40 - UNIT CONTROL BOARD UNIT CONTROL BOARD OPTION SETUP HEAT DELAY SETUP • Enter the Option Setup mode by pushing the OPTION OPTION BYTE SETUP SETUP / STORE button, and holding it for at least 2 sec- onds. -
Page 66: Heat Delay
335224-BIM-B-1208 TABLE 42: HEAT DELAY TABLE 43: IGNITION CONTROL FLASH CODES FLASHES FAULT CONDITIONS CHECK Heat Heat Fan On Fan Off STEADY ON Control Failure Control LED 8 LED 4 LED 2 LED 1 Delay Delay HEARTBEAT Normal Operation Not Applicable Pressure Switch Pressure Switch Stuck Closed... -
Page 67: Basic Troubleshooting Flowchart
335224-BIM-B-1208 Monitored Loss of Call for Heat Off Systems Programming? Call for Heating? Problem? Heating? Program Call for 2nd Unit Call for Trip/Failure Stage Control Heat Cooling Board First Energize ID Call for Monitor Blower Motor Cooling? Stage? Call for 1st Turn off ID Fan on Fan off... -
Page 68: Trip Failure Flow Chart
335224-BIM-B-1208 L o s s o f F r e e z e s t a t T r i p / F a i l u r e S w i t c h S w i t c h O p e n L S I n p u t O p e n ? O p e n... -
Page 69: Cooling Troubleshooting Guide
335224-BIM-B-1208 COOLING TROUBLESHOOTING GUIDE On calls for cooling, the supply air blower motor is operating but compressor #1 is not (the room thermostat fan switch is in the “AUTO” position): On calls for cooling, if the compressors are operating but the supply air blower motor does not energize after a short delay If installed, check the position of the economizer blades. - Page 70 335224-BIM-B-1208 locked out the compressor for repeat trips. The UCB For units without factory installed or with field installed should be flashing an alarm code. If not, press and economizers, the UCB allows compressor operation all release the ALARMS button on the UCB. The UCB will the time.
- Page 71 335224-BIM-B-1208 If 24 volts is present at the UCB Y2 terminal, the com- Check for line voltage at the compressor contactor, M1, pressor may be out due to an open high-pressure switch, and that the contactor is pulled in. Check for loose wiring low-pressure switch, or freezestat.
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Page 72: Gas Heat Troubleshooting Guide
335224-BIM-B-1208 11. If 24 volts is present at the UCB Y1 terminal and the compressor is not out due to a protective switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly wired. Check for 24 volts The furnace may shut down on a high temperature at the Y1 “OUT”... - Page 73 335224-BIM-B-1208 If the blower motor runs with the fan switch in the “ON” the either pressure or rollout switch is not closed. Or the position but does not run shortly after the furnace has draft motor is not sufficiently evacuating the heat ignited when the fan switch is in the “AUTO”...
- Page 74 335224-BIM-B-1208 Johnson Controls Unitary Products...
- Page 75 335224-BIM-B-1208 Johnson Controls Unitary Products...
- Page 76 Subject to change without notice. Printed in U.S.A. 335224-BIM-B-1208 Copyright © 2009 by Johnson Controls, Inc. All rights reserved. Supersedes: 335224-BIM-A-0807 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...