page 4 lgh092, 094, 102, 120, 122, 150 & 152 parts arrangement 3 3 unit controller evaporator coil condenser fans (2 fans on 092, 102, 120, 150 units; 3 fans on
Install a ground joint union between the gas control manifold and the main manual shut-off valve. See figure 9 for gas supply piping entering outside the unit .
©2018 WARNING INSTALLATION INSTRUCTIONS Improper installation, adjustment, alteration, ser vice or maintenance can cause property damage, personal injury or loss of life. Installation and ser vice must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier CAUTION As with any mechanical equipment, contact with sharp sheet metal edges can result in personal in jury. Take care while handling this equipment and wear gloves and protective clothing. Table Of Contents Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 Parts Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . Page 4 Shipping and Packing List . . . . . . . . . . . . . . . . . . . . Page 5 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5 Unit Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6 Duct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7 Rigging Unit For Lifting . . . . . . . . . . . . . . . . . . . . . . . Page 7 Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7 Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9 Pressure Test Gas Piping . . . . . . . . . . . . . . . . . . . . . Page 10 High Altitude Derate . . . . . . . . . . . . . . . . . . . . . . . . . Page 11 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . Page 11 Blower Operation and Adjustments . . . . . . . . . . . . Page 14 LGH092H, LCH092H (7.5 Ton) LGH094U, LCH094U (7.5 Ton) LGH102H, LCH102H (8.5 Ton) LGH120H, LCH120H (10 Ton) LGH122U, LCH122U (10 Ton) LGH150H, LCH150H (12.5 Ton) LGH152U, LCH152U (12.5 Ton) PACKAGED UNITS 507245-06 11/2018 Supersedes 7/2018 Cooling Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22 Gas Heat Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32 Heating Operation and Adjustments . . . . . . . . . . . . Page 33 Electric Heat Start-Up . . . . . . . . . . . . . . . . . . . . . . . . Page 33 Supply Air Inverter Start-Up . . . . . . . . . . . . . . . . . . . Page 34 Supply Air Inverter and Direct Drive Operation . . . Page 36 Direct Drive Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . Page 36 Hot Gas Reheat Operation and Start-Up . . . . . . . . Page 38 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 39 Unit Controller Parameter Settings . . . . . . . . . . . . . Page 43 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE 3 3 LGH SHOWN LGH/LCH092, 102, 120, & 150 DIMENSIONS - GAS HEAT SECTION SHOWN 58-1/8 (1476) 60-1/8 (1527) END VIEW 6-1/8 (156) AA 5-5/8 (143) BOTTOM SUPPLY AIR OPENING BB 6-1/8 (156) 60-1/8 (1527) BASE BOTTOM POWER ENTRY 5-1/2 (140) Dia. 24 (610) 27 (686) 10-3/4 28 (273) 20 (711) (508) CENTER OF GRAVITY BOTTOM RETURN AIR OPENING EE FF 7 (178) 6-5/8 (168) DD BOTTOM CC 7 (178) CONDENSATE 34-7/8 (886) 101-1/4 BASE (2572) TOP VIEW OPTIONAL DISCONNECT (FACTORY INSTALLED) 99-1/4 (2521) 46-7/8 (1191) 43-3/8 (1102) 3-1/2 (89) 1 (25) ELECTRIC INLETS 15-1/2 (394) CONDENSATE DRAIN (FRONT) GAS SUPPLY INLET 5-3/8 (137) 18-1/2 (470) FLUE OUTLET 46-7/8 (1191) 34-7/8 (886) 39-7/8 (1013) FORKLIFT SLOTS (BOTH SIDES) LIFTING HOLES (FOR RIGGING) 101-1/4 (2572) SIDE VIEW 15-1/2 (394) 1-5/8 (41) HORIZONTAL SUPPLY AIR OPENING HORIZONTAL RETURN AIR OPENING 30 (762) 12-1/8 (308) CONDENSATE 6-1/8 DRAIN (BACK) 5-3/8 (156) (137) 31-1/2 30 Important - Do not install (800) 66-3/8 (1686) (762) horizontal economizers on this opening. Refer to SIDE VIEW economizer instructions for proper installation. (Horizontal Openings) Page 2 LGH/LCH094, 122, & 152 DIMENSIONS - GAS HEAT SECTION SHOWN 58-1/8 (1476) 60-1/8 (1527) END VIEW 6-1/8 5-5/8 (156) (143) BOTTOM SUPPLY AA AIR OPENING BB 6-1/8 (156) 60-1/8 (1527) BASE BOTTOM POWER ENTRY 5-1/2 (140) Diameter 7 (178) 24 (610) 27 (686) 10-3/4 28 (273) 20 (711) (508) CENTER OF GRAVITY BOTTOM RETURN AIR OPENING EE FF 6-5/8 (168) DD BOTTOM CC 7 (178) CONDENSATE 34-7/8 (886) 124-3/8 BASE (3159) TOP VIEW 123-1/8 OPTIONAL DISCONNECT (3127) (FACTORY OR FIELD INSTALLED) 46-7/8 (1191) 43-3/8 (1102) 3-1/2 (89) 5/8 (16) ELECTRIC INLETS CONDENSATE DRAIN (FRONT) GAS SUPPLY INLET FLUE OUTLET 5-3/8 (137) 18-1/2 (470) 46-7/8 (1191) 34-7/8 (886) 39-7/8 (1013) FORKLIFT SLOTS (BOTH SIDES) LIFTING HOLES (FOR RIGGING) 124-3/8 (3159) SIDE VIEW 15-1/2 (394) 1-5/8 (41) 15-1/2 (394) HORIZONTAL SUPPLY AIR OPENING HORIZONTAL RETURN AIR OPENING 30 (762) 12-1/8 (308) 54-5/8 (1387) 6-1/8 (156) 89-1/2 (2273) CONDENSATE DRAIN (BACK) 30 (762) SIDE VIEW (Horizontal Openings) 5-3/8 (137) Important - Do not install horizontal economizers on this opening. Refer to economizer instructions for proper installation. Page 3 LGH092, 094, 102, 120, 122, 150 & 152 PARTS ARRANGEMENT DISCONNECT / CIRCUIT BREAKER (FACTORY OR FIELD UNIT INSTALLED OPTION) CONTROLLER EVAPORATOR COIL BLOWER MOTOR (BELT DRIVE SHOWN) CONDENSER FANS (2 FANS ON 092, 102, 120, 150 UNITS; 3 FANS ON 094, 122, 152 UNITS) CONDENSER COIL 3 3 ECONOMIZER (OPTIONAL) BLOWER INVERTER (OPTIONAL) OR INDOOR BLOWER TRANSFORMER (575V UNITS WITH DIRECT DRIVE BLOWER) OUTDOOR FAN TRANSFORMER (094, 122, 152 460V OR 570V UNITS) GAS VALVE COMPRESSORS FILTERS (FOUR - 20 X 25 X CONDENSATE 2") DRAIN HINGED ACCESS PANEL (OPTIONAL) COMBUSTION AIR INDUCER BURNERS LCH092, 094, 102, 120, 122, 150 & 152 PARTS ARRANGEMENT DISCONNECT / CIRCUIT BREAKER (FACTORY OR FIELD INSTALLED OPTION) UNIT CONTROLLER EVAPORATOR COIL BLOWER MOTOR (BELT DRIVE SHOWN) CONDENSER FANS (2 FANS ON 092, 102, 120, 150 UNITS; 3 FANS ON 094, 122, 152 UNITS) CONDENSER COIL 3 3 ECONOMIZER (OPTIONAL) BLOWER INVERTER (OPTIONAL) OR INDOOR BLOWER TRANSFORMER (575V UNITS WITH DIRECT DRIVE BLOWER) OUTDOOR FAN TRANSFORMER (094, 122, 152 460V OR 570V UNITS) COMPRESSORS ELECTRIC HEAT FILTERS CONDENSATE (Optional) (FOUR - 20 X 25 X 2") DRAIN Page 4 HINGED ACCESS PANEL (OPTIONAL) Shipping and Packing List Safety Package 1 of 1 contains: 1- Assembled unit See table 1 for unit clearances. IMPORTANT - Hot gas reheat units require a specific field-provided and installed humidity sensor. Check unit for shipping damage. Receiving party should contact last carrier immediately if shipping damage is found. General These instructions are intended as a general guide and do not supersede local codes in any way. Authorities having jurisdiction should be consulted before installation. WARNING Electric shock hazard and danger of explosion. Can cause injury, death or product or property damage. Turn off gas and electrical power to unit before performing any maintenance or servicing operations on the unit. Follow lighting instructions attached to unit when putting unit back into operation and after service or maintenance. The LGH092, 094, 102, 120, 122, 150 & 152 UNIT CLEARANCES gas/electric packaged rooftop unit is available in 130,000, 180,000, or 240,000 Btuh heating inputs. The LCH092, 094, 102, 120, 122, 150 & 152 cooling packaged rooftop unit is the same basic design as the Optional Outdoor Air Hood C LGH unit except for the heating section. Optional electric heat is factory- or field-installed in LCH units. Ultra high efficiency units have a tandem refrigerant circuit. High efficiency units have two typical circuits. B High efficiency units are equipped with a lightweight, all-aluminum condenser coil; an optional, traditional D fin/tube condenser coil is available. Ultra high efficiency units are equipped with a traditional fin/tube condenser coil. A High efficiency units are available with an optional hot gas reheat coil which provides a dehumidifying mode of operation. Refer to Reheat Operation section. FIGURE 1 Ultra high efficiency units are available with an optional direct drive blower or belt drive blower equipped with an optional supply air inverter. High efficiency units are TABLE 1 UNIT CLEARANCES available with a belt drive blower equipped with an optional supply air inverter. The blower will operate at 1Unit Clearance A B C D Top in.(mm) in.(mm) in.(mm) in.(mm) Clearance lower speeds when demand is low and increase to higher speeds when demand is high. Refer to Inverter and Direct Service 60 36 Clearance (1524) (914) 36 60 (914) (1524) Unob structed Drive Start-Up section. The following examples show the model numbers of ten Clearance to Combus tibles 36 (914) 1 (25) 1 (25) 1 (25) Unob structed ton units with blower options. LGH/LCH120H4B LGH/LCH120H4M LGH/LCH122U4M LGH/LCH122U4E Belt drive Belt drive with inverter Belt drive with inverter Direct drive All units are available using R410A, an ozone-friendly HFC refrigerant. Refer to the Cooling Start-Up section for Minimum Operation Clearance 36 (914) 36 (914) 36 (914) 36 (914) Unob structed Note - Entire perimeter of unit base requires support when elevated above mounting surface. 1 Service Clearance - Required for removal of serviceable parts. Clearance to Combustibles - Required clearance to combustible material (gas units). Minimum Operation Clearance - Required clearance for proper unit operation. precautions when installing unit. Page 5 NOTICE Roof Damage! This system contains both refrigerant and oil. Some rubber roofing material may absorb oil, causing the rubber to swell. Bubbles in the rubber roofing material can cause leaks. Protect the roof surface to avoid exposure to refrigerant and oil during service and installation. Failure to follow this notice could result in damage to roof surface. Unit Support In downflow discharge installations, install the unit on a non-combustible surface only. Unit may be installed on combustible surfaces when used in horizontal discharge applications or in downflow discharge applications when installed on an C1CURB7*B roof mounting frame. NOTE - Securely fasten roof frame to roof per local codes. CAUTION IMPORTANT The Clean Air Act of 1990 bans the intentional vent ing of refrigerant (CFC's and HCFC's) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incar ceration may be levied for non-compliance. Use of this unit as a construction heater or air conditioner is not recommended during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit. To reduce the likelihood of supply / return air by pass and promote a proper seal with the RTU, duct work / duct drops / diffuser assemblies must be supported independently to the building structure. A-Downflow Discharge Application Roof Mounting with C1CURB7*B 1- The C1CURB7*B roof mounting frame must be installed, flashed and sealed in accordance with the instructions provided with the frame. 2- The C1CURB7*B roof mounting frame should be square and level to 1/16" per linear foot (5mm per linear meter) in any direction. If this unit has been used for heating or cooling of buildings or structures under construction, the following conditions must be met or the warranty will be void: S A room thermostat must control the unit. The use of fixed jumpers that will provide continuous heating or cooling is not allowed. S A pre-filter must be installed at the entry to the return air duct. 3- Duct must be attached to the roof mounting frame and not to the unit; supply and return plenums must be installed before setting the unit. Installer's Roof Mounting Frame Many types of roof frames can be used to install the unit depending upon different roof structures. Items to keep in mind when using the building frame or supports are: 1- The base is fully enclosed and insulated, so an enclosed frame is not required. S The return air duct must be provided and sealed to 2- The frames or supports must be constructed with the unit. non-combustible materials and should be square and S Return air temperature range between 55°F (13°C) and 80°F (27°C) must be maintained. S Air filters must be replaced and pre-filters must be removed upon construction completion. level to 1/16" per linear foot (5mm per linear meter) in any direction. 3- Frame or supports must be high enough to prevent any form of moisture from entering unit. Recommended minimum frame height is 14" S The input rate and temperature rise must be set per (356mm). the unit rating plate. S The heat exchanger, components, duct system, air filters and evaporator coil must be thoroughly cleaned following final construction clean-up. 4- Duct must be attached to the roof mounting frame and not to the unit. Supply and return plenums must be installed before setting the unit. 5- Units require support along all four sides of unit base. Supports must be constructed of steel or suitably S The unit operating conditions (including airflow, treated wood materials. cooling operation, ignition, input rate, temperature rise and venting) must be verified according to these NOTE-When installing a unit on a combustible surface for downflow discharge applications, an C1CURB7*B roof installation instructions. mounting frame is required. Page 6 B-Horizontal Discharge Applications 1- Units installed in horizontal airflow applications must use a horizontal conversion kit K1HECK00. 2- Specified installation clearances must be maintained when installing units. Refer to figure 1. 3- Top of support slab should be approximately 4" (102mm) above the finished grade and located so no run-off water from higher ground can collect around the unit. 4- Units require support along all four sides of unit base. Supports must be constructed of steel or suitably treated wood materials. Duct Connection All exterior ducts, joints and openings in roof or building walls must be insulated and weather-proofed with flashing and sealing compounds in accordance with applicable codes. Any duct passing through an unconditioned space must be insulated. A trap must be installed between drain connection and an open vent for proper condensate removal. See figure 3 or 4. It is sometimes acceptable to drain condensate onto the roof or grade; however, a tee should be fitted to the trap to direct condensate downward. The condensate line must be vented. Check local codes concerning condensate disposal. Refer to pages 1 and 2 for condensate drain location. RIGGING Unit *Weight Lbs. Kg. Gas Packaged (2 O.D. Fans) 1401 636 Cooling Packaged (2 O.D. Fans) 1366 620 Heat Pump Packaged 1514 687 Gas Packaged (3 O.D. fans) 1551 704 Cooling Packaged (3 O.D. Fans) 1516 688 *Maximum weight with all available factory-installed accessories. IMPORTANT - ALL PANELS MUST BE IN CAUTION - Do not PLACE FOR RIGGING. walk on unit. LIFTING POINT SHOULD BE DIRECTLY ABOVE CENTER OF GRAVITY CAUTION In downflow applications, do not drill or punch holes in base of unit. Leaking in roof may occur if unit base is punctured. Rigging Unit For Lifting Rig unit for lifting by attaching four cables to holes in unit base rail. See figure 2. 1- Detach wooden base protection before rigging. Note - Remove all 7 (5 brackets on units with three outdoor fans) base protection brackets before setting unit. FIGURE 2 CONDENSATE SIDE DRAIN CONNECTION 2- Connect rigging to the unit base using both holes in each corner. 3- All panels must be in place for rigging. 4- Place field-provided H-style pick in place just above top edge of unit. Frame must be of adequate strength and length. (H-style pick prevents damage to unit.) CAULK AROUND CONDENSATE COUPLING NOTE - Allow clearance to open doors when installing condensate piping. Minimum Pitch 1" (25 mm) per 10' (3 m) of line OPEN VENT UNIT Condensate Drains Make drain connection to the 1" N.P.T. drain coupling provided on unit. Note - The drain pan is made with a glass reinforced engineered plastic capable of withstanding typical joint torque but can be damaged with excessive force. Tighten pipe nipple hand tight and turn an additional quarter turn. ÁÁÁÁ FIGURE 3 MOUNTING FRAME Page 7 CONDENSATE BOTTOM DRAIN CONNECTION UNIT DRAIN PAN CAULK AROUND CONDENSATE COUPLING OPEN VENT MOUNTING FRAME Minimum Pitch 1" (25 mm) per 10' (3 m) of line FIGURE 4 Units are shipped with the drain coupling facing the front of the unit. Condensate can be drained from the back or bottom of the unit with the following modifications. The unit can be installed in either downflow or horizontal air discharge regardless of condensate drain location. Rear Drain Connection 1- Open blower and heat access doors. See figure 5. FILTER ACCESS DOOR BLOWER ACCESS DOOR HEAT ACCESS DOOR CONDENSATE DRAIN MULLION FIGURE 5 2- Remove six screws from filter access door. Refer to figure 6. UNITS WITH HINGED PANELS FILTER DOOR CONDENSATE DRAIN MULLION REMOVE THREE SCREWS (PER HINGE) FIGURE 6 3- Open filter access door hinges and carefully remove door. 4- Remove eight screws holding condensate drain mullion and remove mullion. 5- Lift front edge of the drain pan (to clear bottom drain plug) and slide drain pan out of unit. See figure 7. FIGURE 7 DRAIN PAN 6- Make sure the cap over the unit bottom drain hole is secure. 7- Rotate the drain pan until the downward slope is toward the back of the unit. Slide the drain pan back into the unit. Be careful not to dislodge the cap over the bottom drain hole. 8- From the back side of the unit, pull the drain pan coupling through the rear condensate opening. 9- Replace the condensate drain mullion and reinstall eight screws. 10- Reinstall filter door on hinges. Page 8 Bottom Drain Connection 1- Open blower and heat access doors. See figure 5. 2- Remove six screws from filter access door. Refer to figure 6. 3- Open filter access door hinges and carefully remove door. 4- Remove eight screws holding condensate drain mullion and remove mullion. 5- Lift front edge of the drain pan (to clear bottom drain plug) and slide drain pan out of unit. See figure 7. 6- Turn the drain pan upside down and drill a pilot hole through the bottom of the drain pan in the center of the coupling. See figure 8. BOTTOM CONDENSATE DRAIN CAUTION: Be careful not to damage the coupling threads when drilling the hole. DRILL A PILOT HOLE IN CENTER OF COUPLING Connect Gas Piping (Gas Units) Before connecting piping, check with gas company or authorities having jurisdiction for local code requirements. When installing gas supply piping, length of run from gas meter must be considered in determining pipe size for 0.5" w.c. (.12kPa) maximum pressure drop. Do not use supply pipe smaller than unit gas connection. For natural gas units, operating pressure at the unit gas connection must be a minimum of 4.7" w.c. (1.17kPa) and a maximum of 10.5" (2.60kPa) w.c. For LP/propane gas units, operating pressure at the unit gas connection must be a minimum of 10.5" w.c. (2.61kPa) and a maximum of 13.0" w.c. (3.23kPa). When making piping connections a drip leg should be installed on vertical pipe runs to serve as a trap for sediment or condensate. A 1/8" N.P.T. plugged tap is located on gas valve for test gauge connection. Refer to Heating Start-Up section for tap location. Install a ground joint union between the gas control manifold and the main manual shut-off valve. See figure 9 for gas supply piping entering outside the unit. Figure 10 shows bottom gas entry piping through the curb. Figure 11 shows bottom gas entry piping through the unit. Compounds used on threaded joints of gas piping shall be resistant to the action of liquified petroleum gases. After drilling the pilot hole, drill a 7/8" hole from the inside of the pan. FIGURE 8 OUTSIDE OF UNIT GAS PIPE CONNECTION 7- From the inside of the pan, use a Vari-Bit® bit to enlarge the hole to 7/8". Do not damage coupling threads. 8- Remove the cap over the unit bottom drain hole. 9- Slide the drain pan back into the unit. GROUND JOINT UNION TO GAS VALVE 10- From the back side of the unit, pull the drain pan coupling through the rear condensate opening. 11- From the front side of the unit, move the drain pan until the bottom coupling settles into the unit bottom drain opening. Once in place, check to make sure the coupling is still positioned through the rear condensate drain hole. 12- Use a field-provided 1" plug to seal side drain connection. 13- Replace the condensate drain mullion and reinstall eight screws. TO GAS SUPPLY GAS PIPING SUPPORT MANUAL MAIN SHUT-OFF VALVE DRIP LEG (REFER TO LOCAL CODES) FIGURE 9 14- Reinstall filter door on hinges. Page 9 BOTTOM ENTRY GAS PIPING THROUGH THE CURB MULLION BETWEEN HEAT AND COMPRES SOR SECTIONS 4" NIPPLE 4" NIPPLE TO GAS VALVE GROMMET ALL ELBOWS ARE 3/4" MANUAL MAIN SHUT-OFF VALVE 5" NIPPLE 7-1/2" NIPPLE GROUND JOINT UNION 4" NIPPLE TO GAS SUPPLY 10" NIPPLE ROOF MOUNTING FRAME 3-1/2" NIPPLE 3" NIPPLE DRIP LEG Pressure Test Gas Piping (Gas Units) When pressure testing gas lines, the gas valve must be disconnected and isolated. Gas valves can be damaged if subjected to more than 0.5 psig (3.48kPa). See figure 12. NOTE-Codes may require that manual main shut-off valve and union (furnished by installer) be installed in gas line external to unit. Union must be of the ground joint type. After all connections have been made, check all piping connections for gas leaks. Also check existing unit gas connections up to the gas valve; loosening may occur during installation. Use a leak detection solution or other preferred means. Do not use matches candles or other sources of ignition to check for gas leaks. NOTE-In case emergency shut down is required, turn off the main manual shut-off valve and disconnect main power to unit. These devices should be properly labeled by the installer. PRESSURE TEST GAS LINE FIGURE 10 BOTTOM GAS ENTRY THROUGH THE UNIT ALL ELBOWS ARE 3/4" MULLION BETWEEN HEAT AND COMPRES SOR SECTIONS GROMMET 5" NIPPLE 10" NIPPLE 7-1/2" NIPPLE 4" NIPPLE MANUAL MAIN SHUT-OFF VALVE GAS VALVE CAP GROMMET 4" NIPPLE FIGURE 12 7" NIPPLE TO GAS SUPPLY ALTERNATE KNOCKOUTS ROOF MOUNTING FRAME DRIP LEG 3" NIPPLE TO GAS VALVE GROUND JOINT UNION 4" NIPPLE MANUAL MAIN SHUT-OFF VALVE 3-1/2" NIPPLE FIGURE 11 CAUTION Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed. Do not use matches, candles, flame or othe sources of ignition to check for gas leaks. WARNING Danger of explosion. Can cause injury or product or property damage. Do not use matches, candles, flame or other sources of ignition to check for leaks. Page 10 High Altitude Derate Locate the high altitude conversion sticker in the unit literature bag. Fill out the conversion sticker and affix next to the unit nameplate. Refer to table 2 for high altitude adjustments. TABLE 2 HIGH ALTITUDE DERATE Altitude Ft.* Gas Manifold Pressure 2000-4500 See Unit Nameplate 4500 And Above Derate 2% / 1000 Ft. Above Sea Level *Units installed at 0-2000 feet do not need to be modified. NOTE - This is the only permissible derate for these units. Electrical Connections POWER SUPPLY Route field wiring in conduit between bottom power entry disconnect. See figure 13. This does not supersede local codes or authorities having jurisdiction. FIELD WIRE ROUTING SIDE ENTRY KNOCKOUTS OPTIONAL 120V GFI MAKEUP BOX 2- Route power through the bottom power entry area. On gas units or units with electric heat, connect power wiring to TB2. On cooling only units, connect power to F4. If unit contains an optional factory-installed circuit breaker or disconnect switch, connect line voltage to CB10 or S48. See unit wiring diagram. 3- Connect separate 120v wiring to optional GFCI outlet. Route field wiring in conduit between bottom power entry and GFCI. See figure 13. CONTROL WIRING CAUTION Electrostatic discharge can affect electronic com ponents. Take precautions during unit installation and service to protect the electronic controls. Pre cautions will help to avoid control exposure to elec trostatic discharge by putting the unit, the control and the technician at the same electrostatic poten tial. Neutralize electrostatic charge by touching hands and all tools on an unpainted unit surface, such as the gas valve or blower deck, before per forming any service procedure. A-Thermostat Location Room thermostat mounts vertically on a standard 2" X 4" handy box or on any non-conductive flat surface. Locate thermostat approximately 5 feet (1524mm) above the floor in an area with good air circulation at average temperature. Avoid locating the room thermostat where it might be affected by: -drafts or dead spots behind doors and in corners -hot or cold air from ducts -radiant heat from sun or appliances -concealed pipes and chimneys SEAL WATERTIGHT BOTTOM POWER ENTRY FIGURE 13 RUN FIELD WIRING IN FIELD PRO VIDED CONDUIT B-Control Wiring The Unit Controller will operate the unit from a thermostat or room sensor based on the System Mode. The default System Mode is the thermostat mode. Refer to the Unit Controller Installation and Setup Guide to change the System Mode. Use the menu navigation arrows and select button; SETTINGS Do not apply power or close disconnect switch until installation is complete. Refer to start-up directions. > CONTROL. Options are: "WIRED THERMOSTAT" and "NETWORK". Refer closely to unit wiring diagram. Thermostat Mode Refer to unit nameplate for minimum circuit ampacity and maximum fuse size. 1- 230/460/575 volt units are factory wired. For 208V supply, disconnect the orange wire (230V) at all control power transformer(s). Reconnect the red 1- Route thermostat cable or wires from subbase to control area above compressor (refer to unit dimensions to locate bottom and side power entry). IMPORTANT - Unless field thermostat wires are rated for maximum unit voltage, they must be routed away wire (208V). Tape the exposed end of the 230V orange wire. from line voltage wiring. Use wire ties located on the front border of the control panel to secure thermostat cable. Page 11 Use18 AWG wire for all applications using remotely installed electro-mechanical and electronic thermostats. 2- Install thermostat assembly in accordance with instructions provided with thermostat. 3- Connect thermostat wiring to the bottom of the Unit Controller. 4- Wire as shown in figure 15 for electro-mechanical and electronic thermostats. If using other temperature control devices or energy management systems see instructions and wiring diagram provided by manufacturer. IMPORTANT-Terminal connections at the Unit Controller must be made securely. Loose control wire connections may allow unit to operate but not with proper response to room demand. Room Sensor Mode 1- Install humidity sensor in accordance with instructions provided with sensor. A DDC input may be used to initiate dehumidification instead of a sensor. 2- Make wiring connections as shown in figure 15 for thermostat mode or figure 14 for room sensor mode. In addition, connect either a humidity sensor or a dehumidification input. See figure 16 or 17 for humidity sensor wiring or figure 18 for dehumidification input wiring. FIELD WIRING IN ROOM SENSOR MODE (Room Sensor Mode) UNIT CONTROLLER 24VAC SENSOR SENSOR OUTPUTS IAQ R C AI1 HUM TMP D01 D02 The Unit Controller will operate heating and cooling based on the Unit Controller internal setpoints and the temperature from the A2 room sensor. An optional Network Control Panel (NCP) can also be used to provide setpoints. A thermostat or return air sensor can be used as a back-up mode. Make room sensor wiring connections as shown in figure 14. C-Hot Gas Reheat Units Only - A2 SENSOR FIGURE 14 24 VOLT FIELD WIRING IN THERMOSTAT MODE J298 K55 P262 J262C 24 V POWER TO UNIT CONTROLLER THERMOSTAT INPUTS R TO R J297A P297 R 1 A55 10 C 2 C 2 B 11 G 3 G 2 7 K55-1 TO G W1 S86 B 5 W2 A Y1 TO Y1 ALL OTHER THERMOSTAT Y2 SIGNALS REMAIN CONNECTED AS SHOWN ON THE RIGHT. OCP W1 W2 2 Y1 Y2 OCP 4 5 6 7 8 C 9 W1 W2 12 TO PROVIDE SUPERMARKET REHEAT SCHEME USE S86 DEHUMIDISTAT AND K55. 10 FIGURE 15 Page 12 Humidity Sensor Cable Applications: Wire runs of 50 feet (mm) or less: Use two separate shielded cables containing 20AWG minimum, twisted pair conductors with overall shield. Belden type 8762 or 88760 (plenum) or equivalent. Connect both cable shield drain wires to the Unit Controller as shown in figure 16. Wire runs of 150 feet (mm) or less: Use two separate shielded cables containing 18AWG minimum, twisted pair conductors with overall shield. Belden type 8760 or 88760 (plenum) or equivalent. Connect both cable shield drain wires to the Unit Controller as shown in figure 16. Wire runs over 150 feet (mm): Use a local, isolated 24VAC transformer such as Lennox cat #18M13 (20VA minimum) to supply power to RH sensor as shown in figure 17. Use two shielded cables containing 20AWG minimum, twisted pair conductors with overall shield. Belden type 8762 or 88760 (plenum) or equivalent. FIELD WIRING HOT GAS REHEAT UNITS (Using A Humidity Sensor With Less Than 150 Ft. Wire Runs) NOT CONNECTED A91 VIN J298A 1 A55 UNIT CONTROLLER P298 R 2 C B 3 AI-1 4 C 5 HUM GND DRAIN VO 6 7 TMP D 8 DO-1 9 C 10 DO-2 NOT CONNECTED UNUSED WIRE FIGURE 16 DI-1 FIELD WIRING HOT GAS REHEAT UNITS (Using A Humidity Sensor With More than 150Ft. Wire Runs) NOT CONNECTED ISOLATED 24V TRANSFORMER A55 UNIT CONTROLLER A91 VIN DRAIN NOT CONNECTED J298A 1 2 B 3 4 C 5 P298 R C AI-1 HUM GND VO 6 7 TMP D 8 DO-1 9 C 10 DO-2 DI-1 FIGURE 17 FIELD WIRING HOT GAS REHEAT UNITS (Using A Dehumidification Switch) J299 7 R DEHUMIDIFICATION SWITCH 8 DI-4 9 C 10 Use 24 VAC (R) from any terminal available on J299-2, -5, or -7. FIGURE 18 Page 13 Blower Operation and Adjustments Belt Drive With Supply Air Inverter or Direct Drive Units - The blower rotation will always be correct on units equipped with an inverter or a direct drive blower. Checking blower rotation is not a valid method of determining voltage phasing for incoming power. IMPORTANT Three Phase Scroll Compressor Voltage Phasing Three phase scroll compressors must be phased se quentially to ensure correct compressor and blower* rotation and operation. Compressor and blower are wired in phase at the factory. Power wires are colorcoded as follows: line 1-red, line 2-yellow, line 3-blue. 1-Observe suction and discharge pressures and blow er* rotation on unit start-up. 2-Suction pressure must drop, discharge pressure must rise and blower* rotation must match rotation marking. If pressure differential is not observed or blower* rota tion is not correct: 3-Disconnect all remote electrical power supplies. 4-Reverse any two field-installed wires connected to the line side of S48 disconnect or TB13 terminal strip. Do not reverse wires at blower contactor. 5-Make sure the connections are tight. Discharge and suction pressures should operate at their normal start-up ranges. *Supply air inverter driven motors should rotate in the correct direction; verify scroll compressor rotation separately. Contact technical support if the blower is rotating incorrectly. Units Equipped With Belt Drive Blowers Controlled by an Inverter OR Direct Drive Blowers Equipped With Optional Voltage or Phase Detection - The Unit Controller checks the incoming power during start-up. If the voltage or phase is incorrect, the Unit Controller will display an alarm and the unit will not start. A-Blower Operation Note - On units with staged blowers, use the Unit Controller to start the blower. Refer to the appropriate start-up section. Initiate blower only (G) demand at thermostat according to instructions provided with thermostat. Unit will cycle on thermostat demand. The following steps apply to applications using a typical electro-mechanical thermostat. 1- Blower operation is manually set at the thermostat subbase fan switch. With fan switch in ON position, blowers will operate continuously. 2- With fan switch in AUTO position, the blowers will cycle with demand. Blowers and entire unit will be off when system switch is in OFF position. B-Blower Access The blower assembly is secured to a sliding frame which allows the blower motor assembly to be pulled out of the unit. See figure 19, 20 or 21. Belt Drive Blowers 1- Loosen the reusable wire tie which secures the blower wiring to the blower motor mounting plate. 2- Remove and retain screws on either side of sliding frame. Pull frame toward outside of unit. 3- Slide frame back into original position when finished servicing. Reattach the blower wiring in the previous location on the blower motor base using the wire tie. 4- Replace retained screws on either side of the sliding frame. Direct Drive Blowers 1- Loosen the reusable wire tie which secures the controls and high voltage blower wiring to the blower housing. 2- Remove and retain screws in front and on either side of blower housing. Pull frame toward outside of unit. 3- Slide frame back into original position when finished servicing. Reattach the blower wiring in the previous location on the blower motor base using the wire tie. 4- Replace retained screws in front and on either side of the blower housing. Page 14 TO INCREASE BELT TENSION BELT DRIVE BLOWER ASSEMBLY 1- Loosen four bolts securing motor mounting base to frame. 2- Turn adjusting bolt to the right, or clockwise, to move the motor away from the blower housing. IMPORTANT - Gap between end of frame and motor mounting base should be equal at both ends, i.e. par allel along gap. 3- Tighten four bolts securing motor mounting base to frame. 4- Relieve tension on two adjusting bolts. BLOWER HOUSING MOTOR MOUNTING BASE BELT ADJUSTING BOLTS - TURN CLOCKWISE TO TIGHTEN BELT GAP BETWEEN EDGES SHOULD BE PARALLEL ON BOTH ENDS BEFORE TIGHTENING MOTOR MOUNTING BASE IN PLACE MOTOR SIDE VIEW MOTOR ALLEN SCREW PULLEY BLOWER FRAME REMOVE TWO SCREWS TO COMPLETELY SLIDE BLOWER OUT OF UNIT LOOSEN BEFORE ADJUSTING BELT TENSION (TWO EACH SIDE) REMOVE TWO SCREWS ON EACH SIDE TO SLIDE FRAME PARTIALLY OUT OF UNIT FOR SERVICE ACCESS FIGURE 19 BELT DRIVE BLOWER ASSEMBLY WITH TENSIONER (VIEW SHOWN WITHOUT BELT) MOTOR MOUNTING BASE TO INCREASE OR DECREASE BELT TENSION, REFER TO INSTALLATION LABEL TO COMPLETELY REMOVE BLOWER ASSEMBLY FROM UNIT, TWO ADDITIONAL SCREWS MUST BE REMOVED BLOWER HOUSING MOTOR BLOWER FRAME FIGURE 20 Page 15 TENSIONER REMOVE TWO SCREWS ON EACH SIDE TO SLIDE FRAME PARTIALLY OUT OF UNIT FOR SERVICE ACCESS DIRECT DRIVE BLOWER ASSEMBLY BLOWER HOUSING BLOWER MOTOR SECURED TO THIS SIDE OF HOUSING REMOVE TWO SCREWS ON EACH SIDE TO SLIDE BLOWER OUT OF UNIT INLET GRID FIGURE 21 C-Determining Unit CFM Belt Drive Blowers Controlled By An Inverter IMPORTANT - Belt-driven inverter units are factory-set to run the blower at full speed (60Hz) when there is a blower (G) demand without a heating or cooling demand. Refer to the field-provided, design specified CFM for all modes of operation. Use the following procedure to adjust motor pulley to deliver the highest CFM called for in the design spec. See Inverter Start-Up section to set blower speeds for all modes once the motor pulley is set. IMPORTANT - Direct drive variable blower unit CFM is determined by the Unit Controller. Refer to the Direct Drive Variable Speed Start-Up section. 1- The following measurements must be made with a dry indoor coil. Run blower (G demand) without a cooling demand. Measure the indoor blower shaft RPM. Air filters must be in place when measurements are taken. 2- With all access panels in place, measure static pressure external to unit (from supply to return). Blower performance data is based on static pressure readings taken in locations shown in figure 22. 3- Referring to pages 19 through 22, use static pressure and RPM readings to determine unit CFM. Apply accessory air resistance tables when installing units with any of the optional accessories listed. NOTE - The minimum air volume required for use with optional electric heat (maximum static pressure - 2.0 in.w.g) is 2800 CFM for 7.5Kw, 15Kw, 22.5Kw, 30Kw and 45Kw and 4000 CFM for 60Kw. 4- Blowers Without Belt TensionerThe blower RPM can be adjusted at the motor pulley. Loosen Allen screw and turn adjustable pulley clockwise to increase CFM. Turn counterclockwise to decrease CFM. See figure 19. Do not exceed minimum and maximum number of pulley turns as shown in table 3. Blowers Equipped With Belt TensionerRefer to label on motor base. See figure 20. TABLE 3 MINIMUM AND MAXIMUM PULLEY ADJUSTMENT Belt A Section Minimum Turns Open 0 Maximum Turns Open 5 Note - Static pressure readings can vary if not taken where shown. B Section 1* 6 *No minimum turns open when B belt is used on pulleys 6" O.D. or larger. Page 16 LOCATION OF STATIC PRESSURE READINGS INSTALLATIONS WITH DUCTWORK INSTALLATIONS WITH CEILING DIFFUSERS ROOFTOP UNIT ROOFTOP UNIT SUPPLY RE TURN MAIN DUCT RUN RETURN AIR READING LOCATION FIRST BRANCH OFF OF MAIN RUN SUPPLY AIR READING LOCATION SUPPLY AIR READING LOCATION SUPPLY RE TURN RETURN AIR READING LOCATION DIFFUSER D-Blower Belt Adjustment - No Tensioner FIGURE 22 E-Check Belt Tension Maximum life and wear can be obtained from belts only if proper pulley alignment and belt tension are maintained. Tension new belts after a 24-48 hour period of operation. This will allow belt to stretch and seat in the pulley grooves. Make sure blower and motor pulleys are aligned as shown in figure 23. PULLEY ALIGNMENT ALIGNED Overtensioning belts shortens belt and bearing life. Check belt tension as follows: 1- Measure span length X. See figure 24. 2- Apply perpendicular force to center of span (X) with enough pressure to deflect belt 1/64" for every inch of span length or 1.5mm per 100mm of span length. Example: Deflection distance of a 40" span would be 40/64" or 5/8". MOTOR PULLEY BELT BLOWER PULLEY NOT ALIGNED Example: Deflection distance of a 400mm span would be 6mm. 3- Measure belt deflection force. For a new 2 and 3hp belt, the deflection force should be 5.0-7.0 lbs. (35-48kPa). For a new 5hp belt, the deflection force should be 7-10lbs. (48-69kPa). FIGURE 23 1- Loosen four bolts securing motor base to mounting frame. See figure 19. A force below these values indicates an undertensioned belt. A force above these values indicates an overtensioned belt. MEASURE BELT TENSION 2- To increase belt tension - Turn both adjusting bolts to the right, or clockwise, to move the motor outward and tighten the belt. This increases the distance between the blower motor and the blower housing. To loosen belt tension - FORCE Turn the adjusting bolt to the left, or counterclockwise to loosen belt tension. DEFLECTION 1/64" PER INCH OF SPAN OR 1.5mm PER 100mm OF SPAN IMPORTANT - Align edges of blower motor base and FIGURE 24 mounting frame base parallel before tightening four F-Field-Furnished Blower Drives bolts on the side of base. Motor shaft and blower shaft must be parallel. For field-furnished blower drives, use pages 18 through 20 to determine the drive kit number and table 4 or 5 for 3- Tighten bolts on side of base. drive component manufacturer's numbers. Page 17 BLOWER DATA 092, 094 AND 102 BELT DRIVE BLOWER - BASE UNIT BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY (NO HEAT SECTION) WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE. FOR ALL UNITS ADD: 1 - Wet indoor coil air resistance of selected unit. 2 - Any factory installed options air resistance (heat section, economizer, etc.) 3 - Any field installed accessories air resistance (duct resistance, diffuser, etc.) Then determine from blower table blower motor output required. See page 21 for blower motors and drives. See page 21 for wet coil and option/accessory air resistance data. MAXIMUM STATIC PRESSURE WITH GAS HEAT - 2.0 in. w.g. MINIMUM AIR VOLUME REQUIRED FOR USE WITH OPTIONAL ELECTRIC HEAT (Maximum Static Pressure - 2.0 in. w.g.) 7.5 kW, 15 kW, 22.5 kW, 30 kW and 45 kW - 2800 cfm Total Total Static Pressure - in. w.g. Air Volume 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 cfm RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1750 481 0.21 549 0.4 618 0.57 688 0.7 758 0.82 824 0.93 885 1.08 941 1.23 991 1.39 1038 1.54 1082 1.68 1124 1.82 1166 1.95 2000 493 0.29 561 0.47 629 0.64 700 0.77 768 0.9 832 1.02 892 1.17 946 1.33 995 1.49 1041 1.66 1085 1.81 1126 1.97 1167 2.12 2250 507 0.37 574 0.56 643 0.72 712 0.86 779 0.99 842 1.13 900 1.28 953 1.44 1001 1.61 1045 1.78 1088 1.95 1128 2.12 1168 2.3 2500 521 0.46 588 0.64 657 0.81 727 0.95 792 1.09 853 1.24 909 1.4 960 1.57 1007 1.74 1050 1.93 1091 2.11 1130 2.29 1170 2.48 2750 537 0.56 604 0.74 674 0.91 743 1.06 806 1.21 865 1.36 920 1.53 969 1.71 1014 1.89 1055 2.08 1095 2.27 1133 2.47 1172 2.66 3000 554 0.67 622 0.86 692 1.02 760 1.18 822 1.34 878 1.5 931 1.68 979 1.86 1021 2.06 1061 2.26 1099 2.46 1136 2.65 1174 2.85 3250 572 0.78 641 0.98 712 1.15 778 1.32 838 1.49 892 1.66 943 1.84 989 2.03 1030 2.24 1068 2.45 1105 2.65 1141 2.85 1178 3.06 3500 592 0.9 663 1.12 733 1.3 798 1.47 855 1.65 907 1.83 956 2.02 1000 2.22 1039 2.44 1076 2.65 1111 2.86 1146 3.07 1183 3.27 3750 614 1.04 687 1.28 756 1.47 818 1.65 872 1.83 923 2.02 970 2.22 1011 2.43 1049 2.65 1084 2.87 1118 3.09 1152 3.29 1189 3.51 4000 639 1.22 713 1.48 780 1.66 838 1.83 890 2.02 939 2.22 984 2.44 1023 2.66 1059 2.89 1093 3.11 1126 3.33 1160 3.54 1197 3.77 4250 667 1.43 741 1.69 805 1.86 859 2.02 909 2.22 956 2.45 998 2.68 1036 2.92 1070 3.15 1103 3.37 1135 3.59 1169 3.81 1207 4.05 Page 18 BLOWER DATA 120, 122, 150 AND 152 BELT DRIVE BLOWER - BASE UNIT BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY (NO HEAT SECTION) WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE. FOR ALL UNITS ADD: 1 - Wet indoor coil air resistance of selected unit. 2 - Any factory installed options air resistance (heat section, economizer, etc.) 3 - Any field installed accessories air resistance (duct resistance, diffuser, etc.) Then determine from blower table blower motor output required. See page 21 for blower motors and drives. See page 21 for wet coil and option/accessory air resistance data. MAXIMUM STATIC PRESSURE WITH GAS HEAT - 2.0 in. w.g. MINIMUM AIR VOLUME REQUIRED FOR USE WITH OPTIONAL ELECTRIC HEAT (Maximum Static Pressure - 2.0 in. w.g.) 15 kW, 22.5 kW, 30 kW and 45 kW - 2800 cfm 60 kW - 4000 cfm Total Total Static Pressure - in. w.g. Air Volume 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 cfm RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 2000 497 0.25 558 0.44 624 0.6 694 0.74 764 0.85 830 0.99 889 1.16 943 1.34 994 1.52 1045 1.71 1096 1.89 1146 2.08 1197 2.27 2250 511 0.34 573 0.52 638 0.68 708 0.82 776 0.94 839 1.09 896 1.26 948 1.45 998 1.64 1048 1.83 1098 2.01 1149 2.2 1200 2.4 2500 527 0.44 589 0.62 654 0.78 723 0.91 789 1.05 850 1.21 904 1.39 955 1.58 1003 1.77 1052 1.96 1101 2.14 1152 2.33 1203 2.53 2750 545 0.55 606 0.72 672 0.88 740 1.03 804 1.17 861 1.34 914 1.53 962 1.72 1010 1.92 1057 2.10 1105 2.29 1154 2.47 1206 2.68 3000 564 0.66 626 0.84 692 1.01 759 1.16 819 1.32 874 1.49 924 1.68 971 1.88 1017 2.08 1063 2.26 1110 2.44 1158 2.63 1208 2.83 3250 585 0.79 648 0.98 714 1.14 778 1.31 836 1.48 887 1.66 935 1.86 981 2.06 1026 2.26 1071 2.45 1117 2.63 1163 2.80 1213 3.00 3500 607 0.93 672 1.13 737 1.31 798 1.48 852 1.66 901 1.85 948 2.05 993 2.26 1037 2.46 1081 2.65 1125 2.83 1171 3.01 1221 3.21 3750 632 1.10 698 1.31 762 1.50 819 1.67 869 1.86 915 2.05 961 2.25 1005 2.47 1049 2.68 1092 2.88 1136 3.05 1181 3.24 1231 3.45 4000 660 1.30 726 1.52 787 1.70 838 1.87 885 2.06 930 2.26 974 2.48 1018 2.71 1062 2.93 1105 3.12 1149 3.30 1194 3.49 1245 3.72 4250 691 1.53 755 1.75 810 1.91 857 2.07 901 2.27 945 2.50 990 2.74 1034 2.98 1077 3.20 1120 3.39 1163 3.58 1210 3.79 1262 4.03 4500 724 1.78 783 1.98 831 2.12 874 2.28 917 2.50 962 2.75 1006 3.02 1051 3.27 1094 3.49 1137 3.70 1181 3.89 1228 4.11 1281 4.38 4750 757 2.05 809 2.20 851 2.33 891 2.51 935 2.76 980 3.05 1025 3.33 1070 3.59 1113 3.82 1156 4.03 1201 4.24 1249 4.47 1303 4.75 5000 787 2.31 831 2.43 870 2.57 910 2.78 954 3.06 1000 3.38 1046 3.68 1091 3.95 1135 4.19 1178 4.40 1224 4.62 1272 4.86 1325 5.13 5250 814 2.55 852 2.66 889 2.83 930 3.09 975 3.41 1023 3.76 1070 4.08 1115 4.35 1159 4.59 1203 4.81 1248 5.03 1297 5.27 1350 5.53 5500 835 2.78 871 2.91 909 3.13 952 3.44 999 3.81 1049 4.18 1096 4.51 1142 4.79 1186 5.03 1229 5.24 1275 5.46 1324 5.69 - - - - - - 5750 854 3.01 890 3.19 930 3.48 977 3.86 1027 4.27 1078 4.66 1126 4.99 1171 5.26 1214 5.49 1258 5.70 - - - - - - - - - - - - - - - - - - 6000 871 3.26 910 3.53 955 3.90 1006 4.34 1060 4.80 1111 5.19 1158 5.51 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6250 890 3.57 934 3.94 985 4.41 1041 4.91 1096 5.38 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Page 19 BLOWER DATA 094, 122 AND 152 DIRECT DRIVE BLOWER ALL MODELS - BASE UNIT BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY (NO HEAT SECTION) WITH DRY INDOOR COIL AND AIR FILTERS IN PLACE. FOR ALL UNITS ADD: 1 - Wet indoor coil air resistance of selected unit. 2 - Any factory installed options air resistance (heat section, economizer, etc.) 3 - Any field installed accessories air resistance (duct resistance, diffuser, etc.) See page 21 for wet coil and option/accessory air resistance data. MAXIMUM STATIC PRESSURE WITH GAS HEAT - 2.0 in. w.g. MINIMUM AIR VOLUME REQUIRED FOR USE WITH OPTIONAL ELECTRIC HEAT (Maximum Static Pressure - 2.0 in. w.g.) 094 Models - 7.5 kW - 1750 cfm All Models - 15 kW, 22.5 kW, 30 kW, 45 kW - 2750 cfm 122 and 152 Models - 60 kW - 3500 cfm Total Air Volume cfm 0.2 RPM Watts 0.4 RPM Watts Total Static Pressure - in. w.g. 0.6 0.8 1.0 RPM Watts RPM Watts RPM Watts 1.2 RPM Watts 1.4 RPM Watts 1750 711 188 771 279 836 366 905 453 975 544 1044 640 1109 737 2000 752 242 812 332 876 420 944 510 1011 606 1075 709 1138 812 2250 799 300 860 389 923 479 988 575 1052 678 1113 787 1171 896 2500 853 362 914 453 976 548 1038 650 1097 761 1154 877 1209 990 2750 914 434 974 529 1033 629 1091 739 1146 858 1199 979 1250 1098 3000 980 513 1037 614 1092 720 1146 837 1198 961 1247 1088 1295 1215 3250 1048 598 1101 705 1153 819 1203 941 1251 1071 1298 1206 1343 1343 3500 1116 693 1166 809 1214 931 1261 1060 1307 1198 1351 1341 1395 1489 3750 1185 806 1232 931 1277 1063 1322 1201 1365 1348 1407 1499 1448 1657 4000 1254 937 1299 1072 1341 1214 1383 1363 1424 1518 1464 1679 1503 1844 4250 1324 1089 1366 1234 1406 1386 1445 1545 1484 1708 1522 1876 1559 2046 4500 1395 1262 1433 1417 1471 1579 1508 1745 1544 1913 1581 2084 1616 2256 4750 1465 1455 1501 1619 1536 1787 1571 1957 1606 2128 1641 2299 1675 2470 5000 1534 1666 1568 1834 1602 2004 1635 2174 1668 2345 1701 2514 1735 2682 5250 1603 1887 1635 2055 1667 2224 1699 2392 1731 2559 1763 2724 - - - - - - 5500 1671 2110 1702 2275 1733 2441 1764 2605 - - - - - - - - - - - - - - - - - - 5750 1738 2325 1768 2488 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Total Air Volume cfm 1.6 RPM Watts 1.8 RPM Watts Total Static Pressure - in. w.g. 2.0 2.2 2.4 RPM Watts RPM Watts RPM Watts 2.6 RPM Watts 1750 1172 833 1231 932 1287 1039 1340 1156 1391 1283 1442 1426 2000 1197 913 1253 1019 1306 1135 1357 1261 1407 1398 1457 1547 2250 1227 1003 1280 1117 1330 1242 1379 1378 1428 1525 1477 1680 2500 1261 1103 1311 1226 1360 1361 1407 1507 1454 1663 1501 1826 2750 1299 1219 1347 1350 1394 1494 1440 1649 1485 1813 1530 1982 3000 1342 1346 1388 1487 1432 1640 1476 1803 1520 1973 1563 2146 3250 1388 1485 1432 1638 1475 1800 1517 1969 1558 2143 1600 2319 3500 1437 1643 1479 1805 1519 1975 1560 2148 1600 2325 1640 2502 3750 1489 1821 1528 1990 1567 2164 1605 2340 1645 2517 1685 2693 4000 1541 2014 1579 2187 1616 2364 1654 2540 1693 2715 1732 2887 4250 1596 2218 1632 2393 1668 2569 1705 2742 1743 2913 - - - - - - 4500 1652 2429 1687 2603 1722 2775 1759 2944 - - - - - - - - - - - - 4750 1709 2641 1743 2811 1778 2979 - - - - - - - - - - - - - - - - - - 5000 1768 2850 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5250 --- --- --- --- --- --- --- --- --- --- --- --- 5500 --- --- --- --- --- --- --- --- --- --- --- --- 5750 --- --- --- --- --- --- --- --- --- --- --- --- Page 20 BLOWER DATA FACTORY INSTALLED BELT DRIVE KIT SPECIFICATIONS Motor Efficiency Nominal hp Maximum hp Drive Kit Number RPM Range Standard & High 2 2.3 1 590 - 890 Standard & High 2 2.3 2 800 - 1105 Standard & High 2 2.3 3 795 - 1195 Standard 3 3.45 4 730 - 970 Standard 3 3.45 5 940 - 1200 Standard 3 3.45 6 1015 - 1300 High 3 3.45 7 730 - 970 High 3 3.45 8 940 - 1200 High 3 3.45 9 1015 - 1300 Standard 5 5.75 10 900 - 1135 Standard 5 5.75 11 1040 - 1315 Standard 5 5.75 12 1125 - 1425 NOTE - Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable output of motors furnished are shown. In Canada, nominal motor output is also maximum usable motor output. If motors of comparable output are used, be sure to keep within the service factor limitations outlined on the motor nameplate. NOTE Units equipped with a supply air inverter option are limited to a motor service factor of 1.0. POWER EXHAUST FAN PERFORMANCE Return Air System Static Pressure in. w.g. 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 Air Volume Exhausted cfm 3175 2955 2685 2410 2165 1920 1420 1200 FACTORY INSTALLED OPTIONS/FIELD INSTALLED ACCESSORY AIR RESISTANCE - in. w.g. Gas Heat Exchanger Filters Air Volume cfm 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 5500 5750 6000 Wet Indoor Coil 092, 094, 102 0.04 0.05 0.06 0.07 0.08 0.10 0.11 0.12 0.14 0.15 0.17 0.19 0.20 0.22 0.24 0.25 0.27 0.29 120, 122, 150, 152 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.13 0.14 0.15 0.17 0.18 0.20 0.22 0.23 0.25 0.27 Standard Heat 0.06 0.07 0.07 0.09 0.09 0.11 0.12 0.12 0.14 0.14 0.14 0.15 0.16 0.16 0.16 0.18 0.19 0.20 Medium heat 0.02 0.05 0.07 0.10 0.11 0.12 0.15 0.16 0.19 0.21 0.24 0.26 0.29 0.34 0.37 0.44 0.49 0.54 High Heat Electric Heat Economizer Humiditrol Condenser Reheat Coil MERV 8 0.02 0.03 0.05 0.02 0.01 0.06 0.03 0.06 0.02 0.01 0.08 0.04 0.08 0.02 0.01 0.11 0.04 0.11 0.03 0.01 0.12 0.05 0.12 0.03 0.02 0.13 0.06 0.13 0.03 0.02 0.16 0.06 0.15 0.04 0.02 0.17 0.09 0.15 0.04 0.03 0.20 0.09 0.15 0.05 0.03 0.22 0.09 0.19 0.05 0.04 0.28 0.13 0.19 0.06 0.04 0.32 0.14 0.22 0.07 0.04 0.37 0.17 0.25 0.07 0.05 0.43 0.20 0.29 0.08 0.06 0.47 0.22 0.32 0.08 0.06 0.54 0.25 0.34 0.09 0.07 0.59 0.31 0.45 0.10 0.07 0.64 0.33 0.52 0.10 0.08 MERV 13 0.03 0.03 0.04 0.05 0.05 0.06 0.06 0.07 0.08 0.08 0.09 0.09 0.10 0.10 0.11 0.12 0.12 0.13 Return Air Adaptor Plate 0.00 0.00 0.00 0.00 0.00 0.02 0.02 0.04 0.07 0.09 0.11 0.12 0.16 0.18 0.19 0.22 0.25 0.27 Page 21 DRIVE NO. 1 2 3 4 5 6 7 8 9 10 11 12 TABLE 4 MANUFACTURER'S NUMBERS - NO TENSIONER ADJUSTABLE SHEAVE DRIVE COMPONENTS FIXED SHEAVE BELT BROWNING NO. OEM PART NO. BROWNING NO. OEM PART NO. BROWNING NO. OEM PART NO. 1VP34x7/8 31K6901 AK61x1 100244-20 AX54 100245-25 1VP40x7/8 79J0301 AK59x1 31K6801 AX55 100245-26 1VP34x7/8 31K6901 AK46x1 100244-17 AX52 100245-33 1VP44x7/8 53J9601 AK74x1 100244-21 AX58 100245-34 1VP50x7/8 P-8-2187 AK69x1 37L4701 AX58 100245-34 1VP50x7/8 P-8-2187 AK64x1 12L2501 AX57 100245-28 1VP44x1-1/8 36C0701 AK74x1 100244-21 AX58 100245-34 1VP50x1-1/8 P-8-1977 AK69x1 37L4701 AX58 100245-34 1VP50x1-1/8 P-8-1977 AK64x1 12L2501 AX57 100245-28 1VP50x1-1/8 P-8-1977 BK77x1 49K4001 BX59 59A5001 1VP50x1-1/8 P-8-1977 BK67x1 100244-24 BX57 78L5301 1VP50x1-1/8 P-8-1977 BK62x1 100244-23 BX56 100245-11 DRIVE NO. 1T 2T 3T 4T 5T 6T 7T 8T 9T 10T 11T 12T TABLE 5 MANUFACTURER'S NUMBERS - WITH TENSIONER ADJUSTABLE SHEAVE DRIVE COMPONENTS FIXED SHEAVE BELT BROWNING NO. OEM PART NO. BROWNING NO OEM PART NO. BROWNING NO. OEM PART NO. 1VP44X7/8 P81488 BK95X1 79J2701 BX68 88K3401 1VP50X7/8 P82187 BK90X1 P89659 BX68 88K3401 1VP56X7/8 P81494 BK85X1 49K4101 BX69 10024551 1VP44X7/8 P81488 BK77X1 49K4001 BK66 88K3301 1VP56X7/8 P81494 BK85X1 49K4101 BX69 10024551 1VP50X7/8 P82187 BK67X1 10024424 BX65 10024508 1VP44X11/8 10023907 BK77X1 49K4001 BX68 88K3401 1VP56X11/8 P81492 BK85X1 49K4101 BX70 31K9601 1VP50X11/8 P81977 BK67X1 10024424 BX66 88K3301 1VP50X11/8 P81977 BK77X1 49K4001 BX68 88K3401 1VP50X11/8 P81977 BK67X1 10024424 BX66 88K3301 1VP50X11/8 P81977 BK62X1 10024423 BX66 88K3301 Cooling Start-Up 4- Check voltage at disconnect switch. Voltage must be within range listed on nameplate. If not, consult IMPORTANT-The crankcase heater must be energized power company and have voltage condition for 24 hours before attempting to start compressor. Set corrected before starting unit. thermostat so there is no demand to prevent compressors from cycling. Apply power to unit. 5- Make sure filters are in place before start-up. B-Start-Up A-Preliminary Checks 1- Make sure that unit is installed in accordance with the installation instructions and applicable codes. 2- Inspect all electrical wiring, both field- and factory-installed, for loose connections. Tighten as required. Supply Air Inverter Units - Refer to the Belt Drive Supply Air Inverter Start-Up or Direct Drive Variable Blower section. 1- Initiate first and second stage cooling demands according to instructions provided with thermostat. 2- First-stage thermostat demand will energize compressor 1. Second-stage thermostat demand will 3- Check to ensure that refrigerant lines do not rub against energize compressor 2. On units with an economizer, the cabinet or against other refrigerant lines. when outdoor air is acceptable, a first-stage demand Page 22 will energize the economizer; a second-stage demand will energize compressor 1. 3- Ultra high efficiency units have a tandem refrigerant ciruit. High efficiency units have two typical circuits. See figure 25, 26, 27, or 28. 4- Each refrigerant circuit is charged with R410A refrigerant. See unit rating plate for correct amount of charge. 5- Refer to Cooling Operation and Adjustment section for proper method to check refrigerant charge. C-R410A Refrigerant Units charged with R410A refrigerant operate at much higher pressures than R22. The expansion valve and liquid line drier provided with the unit are approved for use with R410A. Do not replace them with components designed for use with R22. R410A refrigerant is stored in a pink cylinder. Manifold gauge sets used with systems charged with R410A refrigerant must be capable of handling the higher system operating pressures. The gauges should be rated for use with pressures of 0-800 on the high side and a low side of 30" vacuum to 250 psi with dampened speed to 500 psi. Gauge hoses must be rated for use at up to 800 psi of pressure with a 4000 psi burst rating. REFRIGERANT STAGES - 092H, 102H, 120H ALL-ALUMINUM COIL (BOTH FANS ARE ENERGIZED WITH A Y1 DEMAND) CONDENSER COIL STAGE 2 CONDENSER FAN STAGE 1 CONDENSER FAN STAGE 2 EVAPORATOR COIL STAGE 2 B4 B5 IMPORTANT Mineral oils are not compatible with R410A. If oil must be added, it must be a polyol ester oil. REFRIGERANT STAGES - 092H, 102H, 120H TRADITIONAL FIN/TUBE COIL (BOTH FANS ARE ENERGIZED WITH A Y1 DEMAND) CONDENSER FAN STAGE 1 EVAPORATOR COIL STAGE 2 CONDENSER FAN STAGE 2 B4 B5 21 EVAPORATOR COIL STAGE 1 FIGURE 26 REFRIGERANT STAGES - 150H TRADITIONAL FIN/TUBE COIL (STAGE 1 FAN IS ENERGIZED WITH A Y1 DEMAND) CONDENSER COIL STAGE 1 CONDENSER FAN STAGE 1 EVAPORATOR COIL STAGE 2 CONDENSER FAN STAGE 2 CONDENSER COIL STAGE 2 B4 B5 21 EVAPORATOR COIL STAGE 1 FIGURE 25 CONDENSER COIL STAGE 1 Page 23 21 EVAPORATOR COIL STAGE 1 FIGURE 27 REFRIGERANT STAGES - 094U, 122U, 152U TRADITIONAL FIN/TUBE COIL (ALL FANS ARE ENERGIZED IN LOW SPEED WITH A Y1 DEMAND AND HIGH SPEED WITH A Y2 DEMAND) OUTDOOR FAN 1 EVAPORATOR COIL OUTDOOR FAN 2 OUTDOOR FAN 3 B5 B4 B21 2 1 FIGURE 28 OUTDOOR COIL D-Refrigerant Charge and Check - All-Aluminum Coil 092H, 102H, 120H Units WARNING-Do not exceed nameplate charge under any condition. This unit is factory charged and should require no further adjustment. If the system requires additional refrigerant, reclaim the charge, evacuate the system, and add required nameplate charge. NOTE - System charging is not recommended below 60_F (15_C). In temperatures below 60_F (15_C), the charge must be weighed into the system. If weighing facilities are not available, or to check the charge, use the following procedure: IMPORTANT - Charge unit in standard cooling mode. 1- Make sure outdoor coil is clean. Attach gauge manifolds and operate unit at full CFM in cooling mode with economizer disabled until system stabilizes (approximately five minutes). Make sure all outdoor air dampers are closed. 2- Check each system separately with all stages operating. Compare the normal operating pressures (see tables 6 - 8) to the pressures obtained from the gauges. Check unit components if there are significant differences. 3- Measure the outdoor ambient temperature and the suction pressure. Refer to the appropriate circuit charging curve to determine a target liquid temperature. Note - Pressures are listed for sea level applications. 4- Use the same thermometer to accurately measure the liquid temperature (in the outdoor section). D If measured liquid temperature is higher than the target liquid temperature, add refrigerant to the system. D If measured liquid temperature is lower than the target liquid temperature, recover some refrigerant from the system. 5- Add or remove charge in increments. Allow the system to stabilize each time refrigerant is added or removed. 6- Continue the process until measured liquid temperature agrees with the target liquid temperature. Do not go below the target liquid temperature when adjusting charge. Note that suction pressure can change as charge is adjusted. 7- Example LGH/LCH092 Circuit 1: At 95°F outdoor ambient and a measured suction pressure of 130psig, the target liquid temperature is 95.5°F. For a measured liquid temperature of 106°F, add charge in increments until measured liquid temperature agrees with the target liquid temperature. Page 24 Circuit 1 Circuit 2 TABLE 6 LGH/LCH092H Normal Operating Pressures - All-Aluminum - TXV 65 °F Suct (psig) Disc (psig) 75 °F Suct (psig) Disc (psig) Outdoor Coil Entering Air Temperature 85 °F 95 °F Suct (psig) Disc (psig) Suct (psig) Disc (psig) 105 °F Suct (psig) Disc (psig) 110 234 112 273 115 317 116 367 119 428 118 236 120 275 123 319 125 369 127 426 136 240 139 278 142 320 145 369 147 422 157 248 159 284 163 325 166 373 168 424 112 232 115 269 117 313 118 371 120 441 119 237 122 273 125 316 128 367 129 431 134 243 139 279 143 320 146 370 149 424 155 253 156 287 161 328 165 376 169 427 115 °F Suct (psig) Disc (psig) 121 503 130 497 150 483 171 482 122 523 132 508 151 488 172 487 Circuit 1 Circuit 2 TABLE 7 LGH/LCH102H Normal Operating Pressures - All-Aluminum - TXV Outdoor Coil Entering Air Temperature 65 °F 75 °F 85 °F 95 °F 105 °F Suct (psig) Disc (psig) Suct (psig) Disc (psig) Suct (psig) Disc (psig) Suct (psig) Disc (psig) Suct (psig) Disc (psig) 111 234 113 273 115 316 117 365 119 419 120 236 121 275 124 317 126 365 128 417 139 241 142 279 144 321 147 367 148 420 156 251 160 287 164 328 168 374 171 424 113 233 116 273 118 317 120 371 122 439 122 233 124 273 126 317 128 369 131 428 137 242 142 278 145 320 148 369 150 426 155 251 159 288 164 328 168 375 171 429 115 °F Suct (psig) Disc (psig) 121 480 130 476 151 476 175 480 125 530 134 502 153 489 174 488 Circuit 1 Circuit 2 TABLE 8 LGH/LCH120H Normal Operating Pressures - All-Aluminum - TXV Outdoor Coil Entering Air Temperature 65 °F 75 °F 85 °F 95 °F 105 °F Suct (psig) Disc (psig) Suct (psig) Disc (psig) Suct (psig) Disc (psig) Suct (psig) Disc (psig) Suct (psig) Disc (psig) 113 251 113 290 112 331 116 383 117 439 120 254 123 293 124 338 126 388 127 441 139 264 142 303 144 345 147 393 146 445 155 278 160 314 164 357 167 403 169 456 110 251 111 287 111 329 114 388 117 454 119 249 120 291 122 336 124 389 126 447 139 259 142 297 143 337 145 390 144 444 155 274 160 307 164 349 166 393 169 448 115 °F Suct (psig) Disc (psig) 120 520 129 510 148 510 173 512 120 538 128 520 149 514 170 510 Page 25 120 Circuit 1 Circuit 2 110 100 90 LGH/LCH092H4 Ch-arging Curves - All-Aluminum - TXV Outdoor Temperature (°F) 115° 105° 95° 85° Liquid Temperature ( ° F) 80 75° 70 65° 60 100 110 Circuit 1 120 Circuit 2 120 130 140 150 160 170 180 Suction Pressure (psig) LGH/LCH102H Charging Curves - All-Aluminum - TXV Outdoor Temperature (°F) 115° 110 105° 100 95° 90 85° Liquid Temperature ( ° F) 80 75° 70 65° 60 110 120 130 140 150 160 170 180 Suction Pressure (psig) Page 26 Liquid Temperature (° F) LGH/LCH120H Charging Curves - All-Aluminum - TXV 130 Circuit 1 Outdoor Temperature (°F) Circuit 2 115° 120 105° 110 95° 100 85° 90 75° 80 70 65° 60 100 110 120 130 140 150 160 170 180 Suction Pressure (psig) Page 27 E-Refrigerant Charge and Check - Fin/Tube Coil & TXV LGH/LCH092H, 102H, 120H, 150H WARNING-Do not exceed nameplate charge under any condition. This unit is factory charged and should require no further adjustment. If the system requires additional refrigerant, reclaim the charge, evacuate the system, and add required nameplate charge. NOTE - System charging is not recommended below 60°F (15°C). In temperatures below 60°F (15°C) , the charge must be weighed into the system. If weighing facilities are not available, or to check the charge, use the following procedure: IMPORTANT - Charge unit in standard cooling mode. 1- Attach gauge manifolds and operate unit in cooling mode with economizer disabled until system stabilizes (approximately five minutes). Make sure outdoor air dampers are closed. 2- Check each system separately with all stages operating. 3- Use a thermometer to accurately measure the outdoor ambient temperature. 4- Apply the outdoor temperature to tables 9 through 16 to determine normal operating pressures. Pressures are listed for sea level applications at 805F dry bulb and 675F wet bulb return air. 5- Compare the normal operating pressures to the pressures obtained from the gauges. Minor variations in these pressures may be expected due to differences in installations. Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system. Correct any system problems before proceeding. 6- If discharge pressure is high, remove refrigerant from the system. If discharge pressure is low, add refrigerant to the system. S Add or remove charge in increments. S Allow the system to stabilize each time refrigerant is added or removed. 7- Use the following approach method along with the normal operating pressures to confirm readings. Outdoor Coil Entering Air Temp 65oF 75 oF 85 oF 95 oF 105 oF 115 oF TABLE 9 LGH/LCH092H Fin/Tube - TXV CIRCUIT 1 CIRCUIT 2 Dis charge +10 psig Suction +5 psig Dis charge +10 psig Suction +5 psig 235 137 262 137 272 139 298 141 312 142 338 144 357 146 380 146 407 149 428 149 460 154 477 153 TABLE 10 LGH/LCH092H Fin/Tube Hot Gas Reheat - TXV Outdoor Coil Entering Air Temp 65 oF CIRCUIT 1 Dis charge +10 psig Suction +5 psig 242 134 CIRCUIT 2 Dis charge +10 psig Suction +5 psig 262 139 75 oF 279 137 297 143 85 oF 319 140 338 146 95 oF 364 143 379 148 105 oF 414 146 427 151 115 oF 467 151 476 155 Outdoor Coil Entering Air Temp 65 oF 75 oF 85 oF 95 oF 105 oF 115 oF TABLE 11 LGH/LCH102H Fin/Tube - TXV CIRCUIT 1 CIRCUIT 2 Dis charge +10 psig Suction +5 psig Dis charge +10 psig Suction +5 psig 241 139 273 141 277 141 307 144 318 143 348 147 362 145 389 149 411 148 437 151 464 150 486 152 TABLE 12 LGH/LCH102H Fin/Tube Hot Gas Reheat - TXV Outdoor Coil Entering Air Temp 65 oF CIRCUIT 1 Dis charge +10 psig Suction +5 psig 249 137 CIRCUIT 2 Dis charge +10 psig Suction +5 psig 272 142 75 oF 285 139 306 145 85 oF 327 141 347 148 95 oF 370 143 389 150 105 oF 420 146 436 152 115 oF 473 148 485 154 Page 28 TABLE 13 LGH/LCH120H Fin/Tube - TXV Outdoor Coil Entering Air Temp CIRCUIT 1 Dis charge +10 psig Suction +5 psig CIRCUIT 2 Dis charge +10 psig Suction +5 psig 65° F 259 137 283 139 75° F 297 140 321 142 85° F 338 143 360 144 95° F 382 146 406 146 105° F 431 149 453 148 115° F 486 151 505 151 TABLE 14 LGH/LCH120H Fin/Tube Hot Gas Reheat - TXV Outdoor Coil Entering Air Temp CIRCUIT 1 Dis charge +10 psig Suction +5 psig CIRCUIT 2 Dis charge +10 psig Suction +5 psig 65° F 266 134 281 139 75° F 303 137 310 141 85° F 344 140 358 143 95° F 391 143 403 145 105° F 443 146 450 146 115° F 499 149 497 148 TABLE 15 LGH/LCH150H Fin/Tube - TXV Outdoor Coil Entering Air Temp CIRCUIT 1 Dis charge +10 psig Suction +5 psig CIRCUIT 2 Dis charge +10 psig Suction +5 psig 65°F 276 131 275 125 75°F 317 133 314 128 85°F 357 136 363 131 95°F 399 139 408 136 105°F 450 142 457 140 115°F 502 145 509 142 TABLE 16 LGH/LCH150H Fin/Tube Hot Gas Reheat - TXV Outdoor Coil Entering Air Temp CIRCUIT 1 Dis charge +10 psig Suction +5 psig CIRCUIT 2 Dis charge +10 psig Suction +5 psig 65° F 296 135 286 135 75° F 334 137 318 136 85° F 378 139 364 138 95° F 422 142 409 140 105° F 470 144 458 142 115° F 520 147 509 146 Charge Verification - Approach Method - AHRI Testing (Fin/Tube Coil Continued) 1- Using the same thermometer, compare liquid temperature to outdoor ambient temperature. Approach Temperature = Liquid temperature (at condenser outlet) minus ambient temperature. 2- Approach temperature should match values in table 17. An approach temperature greater than value shown indicates an undercharge. An approach temperature less than value shown indicates an overcharge. 3- The approach method is not valid for grossly over or undercharged systems. Use tables 9 through 16 as a guide for typical operating pressures. TABLE 17 APPROACH TEMPERATURE - Fin/Tube - TXV Liquid Temp. Minus Ambient Temp. Unit 1st Stage 2nd Stage 092, 102 8°F + 1 (4.4°C + 0.5) 10°F + 1 (5.6°C + 0.5) 120 6°F + 1 (3.3°C + 0.5) 10°F + 1 (5.6°C + 0.5) 150H 4°F + 1 (2.2°C + 0.5) 6°F + 1 (3.3°C + 0.5) 092 Reheat 8°F + 1 (4.4°C + 0.5) 11°F + 1 (6.1°C + 0.5) 102 Reheat 8°F + 1 (4.4°C + 0.5) 10°F + 1 (5.6°C + 0.5) 120 Reheat 150 Reheat 6°F + 1 (3.3°C + 0.5) 8°F + 1 (4.4°C + 0.5) Page 29 F-Refrigerant Charge and Check - Fin/Tube Coil & TXV LGH/LCH094U, 122U, 152U WARNING-Do not exceed nameplate charge under any condition. This unit is factory charged and should require no further adjustment. If the system requires additional refrigerant, reclaim the charge, evacuate the system, and add required nameplate charge. This unit is equipped with solenoid valves which do not allow refrigerant flow between the high side and the low side when the unit is de-energized. When reclaiming/evacuating the system, make sure refrigerant/vacuum is pulled from both the suction and discharge lines. When adding nameplate charge, add 1/3 to the suction line and 2/3 to the discharge line. NOTE - System charging is not recommended below 60°F (15°C). In temperatures below 60°F (15°C) , the charge must be weighed into the system. If weighing facilities are not available, or to check the charge, use the following procedure: IMPORTANT - Charge unit in standard cooling mode. 1- Attach gauge manifolds and operate unit in cooling mode with economizer disabled until system stabilizes (approximately five minutes). Make sure outdoor air dampers are closed. 2- Make sure both compressors are operating. 3- Use a thermometer to accurately measure the outdoor ambient temperature. Outdoor Coil Entering Air Temp 655 F 755 F 855 F 955 F 1055 F 1155 F Outdoor Coil Entering Air Temp 655 F 755 F 855 F 955 F 1055 F 1155 F Outdoor Coil Entering Air Temp 655 F 755 F 855 F 955 F 1055 F 1155 F TABLE 18 LGH/LCH094U Discharge +10 psig 238 273 313 361 396 448 TABLE 19 LGH/LCH122U Discharge +10 psig 250 288 331 378 412 463 TABLE 20 LGH/LCH152U Discharge +10 psig 266 305 346 391 443 498 Suction +5 psig 136 141 143 146 149 152 Suction +5 psig 134 138 141 143 144 147 Suction +5 psig 129 132 134 138 141 143 4- Apply the outdoor temperature to tables 18 through 20 to determine normal operating pressures. Pressures are listed for sea level applications at 805F dry bulb and 675F wet bulb return air. 5- Compare the normal operating pressures to the pressures obtained from the gauges. Minor variations in these pressures may be expected due to differences in installations. Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system. Correct any system problems before proceeding. 6- If discharge pressure is high, remove refrigerant from the system. If discharge pressure is low, add refrigerant to the system. S Add or remove charge in increments. Charge Verification - Approach Method - AHRI Testing (Fin/Tube Coil Continued) 1- Using the same thermometer, compare liquid temperature to outdoor ambient temperature. Approach Temperature = Liquid temperature (at condenser outlet) minus ambient temperature. 2- Approach temperature should match values in table 17. An approach temperature greater than value shown indicates an undercharge. An approach temperature less than value shown indicates an overcharge. 3- The approach method is not valid for grossly over or undercharged systems. Use tables18 through20 as a guide for typical operating pressures. TABLE 21 APPROACH TEMPERATURE - 094, 122, 152 S Allow the system to stabilize each time refrigerant is added or removed. Unit 7- Use the following approach method along with the normal operating pressures to confirm readings. 094 122, 152 Page 30 Liquid Temp. Minus Ambient Temp. Full Load (Both Compressors) 5°F + 1 (2.8°C + 0.5) 4°F + 1 (2.2°C + 0.5) G-Compressor Controls See unit wiring diagram to determine which controls are used on each unit. 1- Units Equipped With All-Aluminum Coils High Pressure Switch (S4, S7) The compressor circuit is protected by a high pressure switch which opens at 610 psig + 15 psig (4206 kPa + 103 kPa) and automatically resets at 475 psig + 15 psig (3275kPa + 103 kPa). 2- Units Equipped With Traditional Fin/Tube Coil High Pressure Switch (S4) (S7 on 092H, 102H, 120H, 150H only) The compressor circuit is protected by a high pressure switch which opens at 640 psig + 10 psig (4413 kPa + 70 kPa) and automatically resets at 475 psig + 20 psig (3275kPa + 138 kPa). 3- Low Pressure Switch (S87) (S88 on 092H, 102H, 120H, 150H only) The compressor circuit is protected by a loss of charge switch. Switch opens at 40 psig + 5 psig (276 + 34 kPa) and automatically resets at 90 psig + 5 psig (621 kPa + 34 kPa). 4- Crankcase Heater (HR1, HR2) Compressors have belly band compressor oil heaters which must be on 24 hours before running compressors. Energize by setting thermostat so that there is no cooling demand, to prevent compressor from cycling, and apply power to unit. 5- Low Ambient Pressure Switch (S11) (S84 on 092H, 102H, 120H, 150H only) Switch maintains adequate discharge pressure by de-energizing condenser fans when liquid pressure falls below 240 psig +10 (1655 kPa+69). S11 is installed in the liquid line. Switch closes to energize condenser fan when pressure rises to 450 psig +10 (3103kPa + 69). Units Equipped With Two Fans On 092-120H units, the Unit Controller de-energizes condenser fan 2 when outdoor temperature drops below 55°F (13°C). Fan 1 will continue to cycle with liquid pressure. On 150H units, both fans will operate in low speed when outdoor temperature drops below 55°F (13°C). Units Equipped With Three Fans The Unit Controller de-energizes condenser fan 2 and 3 when outdoor temperature drops below 55°F (13°C). Fan 1 continues to operate based on outdoor ambient temperature and liquid pressure. 6- Freezestats (S49, S50) Switches de-energize compressors when evaporator coil temperature falls below 29°F (-2°C) to prevent evaporator freeze-up. Switches reset when evaporator coil temperature reaches 58°F (15°C). 7- Thermal Protector (S5, S8) The compressors used on 094U, 122U and 152U units are protected by an external temperature switch. The n.c. switch opens at 248°F + 9 (120°C + 5) and automatically resets at 169°F + 18 (76°C + 10). 8- Pressure Transducer (A185) The compressor circuit on 094U, 122U and 152U units are monitored by the Unit Controller via the suction pressure transducer. 9- Compressor Temperature sensor (RT37, RT38) The compressor circuit on models 094U, 122U and 152U units are monitored by the Unit Controller via compressor bottom thermistors. Page 31 Gas Heat Start-Up (Gas Units) FOR YOUR SAFETY READ BEFORE LIGHTING WARNING Electric shock hazard. Can cause injury or death. Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect the unit and to replace any part of the control system and any gas control which has been under water. WARNING Danger of explosion. Can cause injury or product or property damage. If over heating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply. This unit is equipped with an automatic spark ignition system. There is no pilot. In case of a safety shutdown, move thermostat switch to OFF and return the thermostat switch to HEAT to reset ignition control. A-Placing Unit In Operation WARNING Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly. Gas Valve Operation for Honeywell VR8205Q/VR8305Q and White Rodgers 36H54 (figure 29 and 30). WHITE RODGERS 36H54 GAS VALVE INLET Two-Stage PRESSURE TAP MANIFOLD PRESSURE TAP WARNING Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies. WARNING SMOKE POTENTIAL The heat exchanger in this unit could be a source of smoke on initial firing. Take precautions with re spect to building occupants and property. Vent ini tial supply air outside when possible. HIGH FIRE ADJUSTMENT LOW FIRE ADJUSTMENT GAS VALVE SWITCH SHOWN IN ON POSITION. FIGURE 29 HONEYWELL VR8205Q/VR8305Q GAS VALVE HIGH FIRE ADJUSTMENT LOW FIRE ADJUSTMENT MANIFOLD PRESSURE TAP BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, do not try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion. INLET PRESSURE TAP GAS VALVE KNOB IS SHOWN IN OFF POSITION. FIGURE 30 1- Set thermostat to lowest setting. WARNING 2- Turn off all electrical power to appliance. 3- This appliance is equipped with an ignition device Danger of explosion. Can cause injury or death. Do not attempt to light manually. Unit has a direct spark ignition system. which automatically lights the burner. Do not try to light the burner by hand. 4- Open or remove the heat section access panel. Page 32 5- Turn gas valve switch to OFF. See figure 29. On Honeywell VR8305Q gas valves, turn the knob on the gas valve clockwise to "OFF". Do not force. See figure 30. 6- Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you do not smell gas, go to the next step. 7- Turn gas valve switch to ON. See figure 29. On Honeywell VR8305Q gas valves, turn the knob on the gas valve counterclockwise to "ON". Do not force. See figure 30. 8- Close or replace the heat section access panel. 9- Turn on all electrical power to appliance. 3- Spark ignitor energizes and gas valve solenoid opens. 4- Spark ignites gas, ignition sensor proves the flame and combustion continues. 5- If flame is not detected after first ignition trial, ignition control will repeat steps 3 and 4 two more times before locking out the gas valve. 6- For troubleshooting purposes, an ignition attempt after lock out may be re-established manually. Move thermostat to "OFF" and return thermostat switch to "HEAT" position. B-Limit Controls Limit controls are factory-set and are not adjustable. The primary limit is located on the blower deck to the right of the blower housing. 10- Set thermostat to desired setting. C-Heating Adjustment 11- The ignition sequence will start. Main burners are factory-set and do not require adjustment. 12- If the appliance does not light the first time (gas line not fully purged), it will attempt up to two more ignitions before locking out. 13- If lockout occurs, repeat steps 1 through 10. 14- If the appliance will not operate, follow the instructions "Turning Off Gas to Appliance" and call your service technician or gas supplier. Turning Off Gas to Unit 1- If using an electromechanical thermostat, set to the lowest setting. 2- Before performing any service, turn off all electrical power to the appliance. 3- Open or remove the heat section access panel. 4- Turn gas valve switch to OFF. On Honeywell VR8305Q gas valves, turn the knob on the gas valve clockwise to "OFF". Do not force. 5- Close or replace the heat section access panel. WARNING Danger of explosion. Can cause injury or death. Do not attempt to light manually. Unit has a direct spark ignition system. Heating Operation and Adjustments (Gas Units) A-Heating Sequence of Operation 1- On a heating demand the combustion air inducer starts immediately. 2- Combustion air pressure switch proves inducer operation. After a 30-second pre-purge, power is allowed to ignition control. Switch is factory set and requires no adjustment. The following manifold pressures are listed on the gas valve. Natural Gas Units - Low Fire - 1.6" w.c. (not adjustable) Natural Gas Units - High Fire - 3.7" w.c. LP Gas Units - Low Fire - 5.5" w.c. (not adjustable) LP Gas Units - High Fire - 10.5" w.c. Electric Heat Start-Up (Cooling Units) Factory- or Field-Installed Option Electric heat will stage on and cycle with thermostat demand. Number of stages of electric heat will vary depending on electric heat assembly. See electric heat wiring diagram on unit for sequence of operation. SCR Electric Heat Controller (LCH Units) Optional factory-installed SCR (A38) will provide small amounts of power to the electric heat elements to efficiently maintain warm duct air temperatures when there is no heating demand. The SCR maintains duct air temperature based on input from a field-provided and installed thermostat (A104) and duct sensor (RT20). SCR is located in the electric heat compartment in front of the elements. Use only with a thermostat or Novar control system. Use the instructions provided with the thermostat to set DIP switches as follows: S1 On, S2 Off, S3 Off. Use the instructions provided with the duct sensor to install sensor away from electric element radiant heat and in a location where discharge air is a mixed average temperature. Once power is supplied to unit, zero SCR as follows: 1- Adjust thermostat (A104) to minimum position. 2- Use a small screwdriver to slowly turn the ZERO potentiometer on the SCR until the LED turns solid red. 3- Very slowly adjust the potentiometer the opposite direction until the LED turns off. Page 33 Belt Drive Supply Air Inverter Start-Up A-Design Specifications SETTINGS > RTU Options > EDIT PARAMETER > ENTER DATA ID - 9 > MIN DAMPER LOW BLOWER = X.X % Use table 22 to fill in field-provided, design specified blower CFM. B-Set Maximum CFM Use table 22 to determine highest blower CFM for appropriate unit. Adjust the blower pulley to deliver that amount of CFM with only the blower operating. See Determining Unit CFM in the Blower Operation and Adjustment section. TABLE 22 Blower CFM Design Specifications Measure the intake air CFM. If the CFM is lower than the design specified CFM for ventilation air, use the Unit Controller to increase the damper percent open. If the CFM is higher than specified, decrease the damper percent open. Note - Intake air CFM can also be determined using the outdoor air temperature, return air temperature and mixed air temperature. Refer to the economizer or outdoor air damper installation instructions. Set Minimum Position 2 Blower Speed Heating Cooling High Cooling Low Ventilation Design Specified CFM C-Enter Design Specifications Into Controller Use the same menu in the Unit Controller to set "Min OCP Blwr High" for the blower CFM above the "midpoint" CFM. When navigating into this menu, the Unit Controller will bring on the corresponding blower speed and allow damper position adjustment. SETTINGS > RTU OPTIONS > DAMPER > MIN DAMPER POSITION BLOWER ON HIGH = X.X % Use the following menu to enter the blower design specified CFM into the Unit Controller. Make sure blower CFM is within limitations shown in table 23 or 24. Refer to the Unit Controller manual provided with unit. SETUP > TEST & BALANCE > BLOWER > Enter the Heating, Cooling High, Cooling Low and Ventilation speed per table 22. Adjust the blower RPM to deliver the target CFM based on the measured static pressure using the blower table. After adjusting the RPM, read the static pressure again and apply the RPM/static to blower tables to determine adjusted CFM. Repeat adjustments until design CFM is reached. D-Set Damper Minimum Position Measure the intake air CFM. If the CFM is lower than the design specified CFM for ventilation air, use the Unit Controller to increase the damper percent open. If the CFM is higher than specified, decrease the damper percent open. Note - Intake air CFM can also be determined using the outdoor air temperature, return air temperature and mixed air temperature. Refer to the economizer or outdoor air damper installation instructions. E-Inverter Bypass Option Units equipped with a supply air inverter are factory-set to by-pass the inverter manually. To by-pass the inverter and operate the blower in the constant air volume mode, use the following Unit Controller menu and set to "YES": To maintain required minimum ventilation air volumes when the unit is in the occupied mode, two minimum damper positions must be set. The Unit Controller will open the dampers to "Min OCP Blwr Low" when blower CFM is BELOW a "midpoint" CFM. The Unit Controller will open the damper to "Min OCP Blwr High" when blower CFM is at or ABOVE the "midpoint" CFM. The Unit Controller will calculate the "midpoint" CFM. Set Minimum Position 1 Use the following menu in the Unit Controller to set "Min OCP Blwr Low" for the blower CFM below the "midpoint" CFM. When navigating into this menu, the Unit Controller will bring on the corresponding blower speed and allow damper position adjustment. SETTINGS>RTU OPTIONS>BLOWER>VFD BYPASS To configure the unit to by-pass the VFD automatically, use the following Unit Controller menu and set to "automatic": SETUP > INSTALL > PRESS SAVE UNTIL THE MENU READS CONFIGURATION ID 1 > CHANGE CHARACTER POSITION 6TH TO "A" FOR AUTOMATIC BYPASS OPTION AND SAVE Caution - Units not equipped with an inverter will be set to SETUP > INSTALL > CONFIGURATION ID 1 (CHARACTER POSITION 6TH) TO "N" NOT APPLICABLE. The blower motor could be damaged and/or result in product or property damage if the setting is changed to automatic or manual. Page 34 TABLE 23 MINIMUM AND MAXIMUM CFM BELT DRIVE STD. & HIGH EFFICIENCY UNITS Gas Heat Minimum CFM Unit Gas Heat Size Airflow CFM LGH092-120, 150 Std., Med. 2225 LGH092-120, 150 High 2550 Electric Heat Minimum CFM Unit Heat Size (kW) LCH092-102 0 LCH092-150 15, 22.5, 30, 45 LCH120-150 0, 60 Airflow CFM 2800 2800 4000 Cooling Low Minimum CFM - 220 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH092 Low 1650 LGH/LCH102 Low 1870 LGH/LCH120 Low 2200 LGH/LCH150 Low 2750 Cooling High Minimum CFM - 280 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH092 High 2100 LGH/LCH102 High 2380 LGH/LCH120 High 2800 LGH/LCH150 High 3500 Smoke and Ventilation Minimum CFM - 150 CFM/ton Unit Not Ap plicable Airflow CFM LGH/LCH092 NA 1125 LGH/LCH102 NA 1275 LGH/LCH120 NA 1500 LGH/LCH150 NA 1875 Heating and Cooling Maximum CFM - 480 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH092 High 3600 LGH/LCH102 High 4080 LGH/LCH120 High 4800 LGH/LCH150 High 6000 TABLE 24 MINIMUM AND MAXIMUM CFM BELT DRIVE ULTRA HIGH EFFICIENCY BLOWERS 094U4M, 122U4M, 152U4M Gas Heat Minimum CFM Unit Gas Heat Size Airflow CFM* LGH094-152 Std. , Med. 2225 LGH094-152 High 2550 Electric Heat Minimum CFM Unit Heat Size (kW) LCH094 7.5, 15, 22.5, 30, 45 LCH122, 152 15, 22.5, 30, 45 LCH122, 152 0, 60 Airflow CFM 2800 2800 4000 Cooling Low Minimum CFM - 160 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH094 Low 1200 LGH/LCH122 Low 1600 LGH/LCH152 Low 2000 Cooling High Minimum CFM - 280 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH094 High 2100 LGH/LCH122 High 2800 LGH/LCH152 High 3500 Smoke and Ventilation Minimum CFM - 150 CFM/ton Unit Not Applicable Airflow CFM LGH/LCH094 NA 1125 LGH/LCH122 NA 1500 LGH/LCH152 NA 1875 Heating and Cooling Maximum CFM - 480 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH094 High 3600 LGH/LCH122 High 4800 LGH/LCH152 High 6000 *Rounded to nearest 25 CFM. Page 35 Supply Air Inverter and Direct Drive Operation Direct Drive Blower Start-Up This is a summary of cooling operation. Refer to the sequence of operation provided in the Engineering Handbook or Service Manual for more detail. Note - During a dehumidification demand the blower operates at the highest speed. Free cooling is locked-out during reheat operation. Refer to hot gas reheat start-up and operation section for details. A-Set Blower Speed 1- Use table 25 to fill in field-provided, design specified blower CFM. TABLE 25 Blower CFM Design Specifications Blower Speed Design Specified CFM A-Two-Stage Thermostat 1-Economizer With Outdoor Air Suitable Y1 Demand Compressors Off Blower Cooling Low Dampers modulate Y2 Demand Compressors Off Blower Cooling High Dampers Modulate Note - If dampers are at maximum open for three minutes, compressor 1 is energized and blower stays on cooling high. 2-No Economizer or Outdoor Air Not Suitable Y1 Demand Compressor 1 On Blower Cooling Low Dampers Minimum Position Y2 Demand Compressor 1 and 2 On Blower Cooling High Dampers Minimum Position B-Three-Stage Thermostat OR Room Sensor Heating Cooling High Cooling Low Ventilation 2- Use the following menu to enter the blower design specified CFM into the Unit Controller. Don't press "SAVE" until all CFM are entered. Make sure blower CFM is within limitations shown in table 26. Refer to the Unit Controller manual provided with unit. SETUP > TEST & BALANCE > BLOWER 3- Once all four speeds are entered, the target (highest of the heating and cooling settings) CFM and default RPM will be displayed. Note - When units are not equipped with heat, the Blower Heat speed will not be displayed. Blower Cooling High will be the first blower speed to appear. 4- Measure the static pressure as shown in the Blower Start-Up section. Use the static pressure, target CFM and blower tables to determine the RPM needed. Values in the blower table reflect the static pressures taken in locations shown in figure 22. 1-Economizer With Outdoor Air Suitable Y1 Demand Compressors Off 5- Enter the RPM and repeat the previous step until the design CFM is reached. Blower Cooling Low Dampers modulate Y2 Demand Compressors Off 6- Press SAVE followed by MAIN MENU. Note - Once the CFM settings are saved, the Unit Controller will set all other blower CFM. Blower Cooling High Dampers Modulate Note - If dampers are at maximum open for three minutes, compressor 1 is energized and blower stays on cooling high. B-Set Damper Minimum Position To maintain required minimum ventilation air volumes when the unit is in the occupied mode, two minimum damper positions must be set. The Unit Controller will open Y3 Demand - the dampers to "Min OCP Blwr Low" when blower CFM is Compressors 1 and 2 On Blower Cooling High BELOW a "midpoint" CFM. The Unit Controller will open the damper to "Min OCP Blwr High" when blower CFM is at Dampers Maximum Open or ABOVE the "midpoint" CFM. Page 36 The Unit Controller will calculate the "midpoint" CFM. Set Minimum Position 1 Use the following menu in the Unit Controller to set "Min OCP Blwr Low" for the blower CFM below the "midpoint" CFM. When navigating into this menu, the Unit Controller will bring on the corresponding blower speed and allow damper position adjustment. SETTINGS > RTU Options > EDIT PARAMETER > ENTER DATA ID - 9 > MIN DAMPER LOW BLOWER = X.X % Measure the intake air CFM. If the CFM is lower than the design specified CFM for ventilation air, use the Unit Controller to increase the damper percent open. If the CFM is higher than specified, decrease the damper percent open. Note - Intake air CFM can also be determined using the outdoor air temperature, return air temperature and mixed air temperature. Refer to the economizer or outdoor air damper installation instructions. Set Minimum Position 2 Use the same menu in the Unit Controller to set "Min OCP Blwr High" for the blower CFM above the "midpoint" CFM. When navigating into this menu, the Unit Controller will bring on the corresponding blower speed and allow damper position adjustment. SETTINGS > RTU OPTIONS > DAMPER > MIN DAMPER POSITION BLOWER ON HIGH = X.X % Measure the intake air CFM. If the CFM is lower than the design specified CFM for ventilation air, use the Unit Controller to increase the damper percent open. If the CFM is higher than specified, decrease the damper percent open. Note - Intake air CFM can also be determined using the outdoor air temperature, return air temperature and mixed air temperature. Refer to the economizer or outdoor air damper installation instructions. TABLE 26 MINIMUM AND MAXIMUM CFM DIRECT DRIVE BLOWERS 094U4E, 122U4E, 152U4E Gas Heat Minimum CFM Unit Gas Heat Size Airflow CFM* LGH094-152 Std. , Med. 2225 LGH094-152 High 2550 Electric Heat Minimum CFM Unit Heat Size (kW) LCH094 7.5 LCH094 0, 15, 22.5, 30, 45 LCH122, 152 15, 22.5, 30, 45 LCH122, 152 0, 60 Airflow CFM 1750 2750 2750 3500 Cooling Low Minimum CFM - 160 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH094 Low 1200 LGH/LCH122 Low 1600 LGH/LCH152 Low 2000 Cooling High Minimum CFM - 220 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH094 High 1650 LGH/LCH122 High 2200 LGH/LCH152 High 2750 Smoke and Ventilation Minimum CFM - 150 CFM/ton Unit Not Applicable Airflow CFM LGH/LCH094 NA 1125 LGH/LCH122 NA 1500 LGH/LCH152 NA 1875 Heating and Cooling Maximum CFM - 480 CFM/ton Unit Blower Speed Airflow CFM LGH/LCH094 High 3600 LGH/LCH122 High 4800 LGH/LCH152 High 6000 *Rounded to nearest 25 CFM. Page 37 Hot Gas Reheat Start-Up And Operation General Hot gas reheat units provide a dehumidifying mode of operation. These units contain a reheat coil adjacent to and downstream of the evaporator coil. Reheat coil solenoid valve, L14, routes hot discharge gas from the compressor to the reheat coil. Return air pulled across the evaporator coil is cooled and dehumidified; the reheat coil adds heat to supply air. See figure 31 for reheat refrigerant routing and figure 32 for standard cooling refrigerant routing. REHEAT MODE REFRIGERANT ROUTING RETURN AIR STAGE 2 EVAPORATOR COIL STAGE 1 EVAPORATOR COIL REHEAT COIL SUPPLY AIR EXPANSION VALVE REHEAT VALVE OUTDOOR AIR TWO CONDENSER FANS STAGE 2 CONDENSER COIL STAGE 1 CONDENSER COIL STAGE 1 COMPRESSOR STAGE 2 COMPRESSOR CHECK VALVE FIGURE 31 COOLING MODE REFRIGERANT ROUTING RETURN AIR OUTDOOR AIR STAGE 2 EVAPORATOR COIL STAGE 1 EVAPORATOR COIL REHEAT COIL SUPPLY AIR EXPANSION VALVE REHEAT VALVE TWO CONDENSER FANS STAGE 2 CONDENSER COIL STAGE 1 CONDENSER COIL STAGE 1 COMPRESSOR STAGE 2 COMPRESSOR CHECK VALVE FIGURE 32 Page 38 L14 Reheat Coil Solenoid Valve When Unit Controller input (Unit Controller J298-5 or J299-8) indicates room conditions require dehumidification, L14 reheat valve is energized (Unit Controller P269-3) and refrigerant is routed to the reheat coil. Reheat Setpoint Reheat is factory-set to energize when indoor relative humidity rises above 60% (default). Reheat will terminate when the indoor relative humidity falls 3% (57% default) or the digital output de-energizes. Adjust reheat options using Unit Controller menu SETTINGS > RTU OPTIONS > DEHUMIDIFIER. Check-Out Test hot gas reheat operation using the following procedure. 1- Make sure reheat is wired as shown in wiring section. 2- Make sure unit is in local thermostat mode. 3- Select Unit Controller menu SERVICE > TEST > DEHUMIDIFIER Service The unit should be inspected once a year by a qualified service technician. CAUTION Label all wires prior to disconnection when servic ing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. A-Filters Units are equipped with four 20 X 25 X 2" filters. Filters should be checked monthly and replaced when necessary with filters of like kind and size. Take note of air flow direction marking on filter frame when reinstalling filters. See figure 33. NOTE-Filters must be U.L.C. certified or equivalent for use in Canada. REMOVE FILTERS The blower and compressor 1 (reheat) should be operating. DEHUMIDIFIER 1 ON will appear on the Unit Controller display 4- Press BACK on the Unit Controller display to stop the testing mode. PULL TO REMOVE FILTERS Compressor 1 (reheat) and blower should de-energize. Default Reheat Operation TABLE 27 Reheat Operation - Two Cooling Stages - Default FIGURE 33 T'stat and Humid ity Demands Operation Reheat Only Compressor 1 Reheat Reheat & Y1 Compressor 1 Reheat & Compressor 2 Cooling* B-Lubrication All motors are lubricated at the factory. No further lubrication is required. Reheat & Y1 & Y2 Compressor 1 Cooling & Compressor 2 Cooling** *If there is no reheat demand and outdoor air is suitable, free cooling will operate. **If there is no reheat demand and outdoor air is suitable, free cooling and compressor 1 will operate. Page 39 C-Burners (Gas Units) Periodically examine burner flames for proper appearance during the heating season. Before each heating season examine the burners for any deposits or blockage which may have occurred. Clean burners as follows: 1- Turn off both electrical power and gas supply to unit. 2- Remove burner compartment access panel. 3- Remove screws securing burner assembly to burner support and remove assembly. See figure 34. Clean as necessary. 4- Locate the ignitor under the left burners. Check ignitor spark gap with appropriately sized twist drills or feeler gauges. See figure 35. GAS VALVE BURNER BOX ASSEMBLY 240KBTUH SHOWN BURNER ASSEMBLY SECURED WITH MULTIPLE SCREWS 5- Check the alignment of the ignitor and the sensor as shown in figure 36 and table 28. 6- Replace burners and screws securing burner. 7- Replace access panel. 8- Restore electrical power and gas supply. Follow lighting instructions attached to unit and use inspection port in access panel to check flame. TABLE 28 Dimension Unit Btuh Input Length - in. (mm) Ignitor Sensor A 130K 7-3/4 (197) 11 (279) B 180K 5 (127) 5-1/2 (140) C 240K 2-1/4 (57) 2-3/4 (70) D-Combustion Air Inducer (Gas Units) A combustion air proving switch checks combustion air inducer operation before allowing power to the gas controller. Gas controller will not operate if inducer is obstructed. WARNING Danger of explosion. Can cause injury or death. Do not overtighten main burner mounting screws. Snug tighten only. GAS MANIFOLD FIGURE 34 IGNITOR SPARK GAP SHOULD BE 1/8" (3mm) FIGURE 35 Under normal operating conditions, the combustion air inducer wheel should be checked and cleaned prior to the heating season. However, it should be examined periodically during the heating season to establish an ideal cleaning schedule. With power supply disconnected, the condition of the inducer wheel can be determined by looking through the vent opening. Clean combustion air inducer as follows: 1- Shut off power supply and gas to unit. 2- Disconnect pressure switch air tubing from combustion air inducer port. 3- Remove and retain screws securing combustion air inducer to flue box. Remove vent connector. See figure 37. 4- Clean inducer wheel blades with a small brush and wipe off any dust from housing. Clean accumulated dust from front of flue box cover. 5- Return combustion air inducer motor and vent connector to original location and secure with retained screws. It is recommended that the combustion air inducer gasket be replaced during reassembly. 6- Clean combustion air inlet louvers on heat access panel using a small brush. Page 40 IGNITOR A B C IGNITOR AND SENSOR POSITION TOP VIEW SENSOR A B C SIDE VIEW IGNITOR Gas Flow SIDE VIEW SENSOR Gas Flow 1-3/8" (35mm) 1-3/4" (45mm) 13/16" (21mm) HEAT EXCHANGER ASSEMBLY HEAT EXCHANGER TUBE COMBUSTION AIR INDUCER BURNER BOX 3/8" (10mm) FIGURE 36 E-Flue Passageway and Flue Box (Gas Units) 1- Remove combustion air inducer assembly as described in section D. 2- Remove flue box cover. Clean with a wire brush as required. 3- Remove inserts if installed. See figure 38. 4- Clean tubes with a wire brush. 5- Reassemble the unit. The flue box cover gasket and combustion air inducer gasket should also be replaced during reassembly. VENT CONNECTOR F-Gas Heat Exchanger Inserts 1- Inserts are installed on standard (130,000Btuh) and high (240,000Btuh) heat exchangers. Medium heat exchangers do not require inserts. See figure 38. GAS VALVE BURNER FIGURE 37 Page 41 STANDARD HEAT (130,000BTUH) INSERT LOCATION Note - No inserts on medium heat. HIGH HEAT (180,000BTUH) INSERTS (2) INSERTS (4) G-Evaporator Coil FIGURE 38 J-Condenser Coil Inspect and clean coil at beginning of each cooling season. Clean using mild detergent or commercial coil cleaner. Flush coil and condensate drain with water taking care not to get insulation, filters and return air ducts wet. H-Supply Air Blower Wheel Annually inspect supply air blower wheel for accumulated dirt or dust. Turn off power before attempting to remove access panel or to clean blower wheel. All-Aluminum Coils - Clean condenser coil annually with water and inspect monthly during the cooling season. Clean the all-aluminum coil by spraying the coil steadily and uniformly from top to bottom. Do not exceed 900 psi or a 45_ angle; nozzle must be at least 12 inches from the coil face. Take care not to fracture the braze between the fins and refrigerant tubes. Reduce pressure and work cautiously to prevent damage. Fin/Tube Coils - Clean condenser coil annually with detergent or commercial coil cleaner and inspect monthly during the cooling season. Access panels are provided on front and back of condenser section. Page 42 Factory Unit Controller Settings TABLE 32 580733 Use the Unit Controller to adjust parameters; menu paths are shown in each table. Refer to the Unit Controller manual provided with each unit. Units With BACnet Module (Kohl's) Settings Use menu SETUP > NETWORK INTEGRATION. Set "BACNET" and network address. BACNET MAC ADDRESS: Tables 29 through 39 show factory settings (in degrees, % of fan CFM, etc.). Record adjusted settings on the label located inside the compressor access panel. When field installing optional kits and accessories, the Unit Controller must be configured to identify the option before it will function. Refer to figures 39 and 40 to determine whether the Unit Controller configuration I.D. must change. To configure the option, use MAIN MENU > SETUP > INSTALL menu path. Press SAVE until CONFIGURATION ID 1 or 2 appears depending on the option installed. Change the appropriate character in the configuration I.D. For example, when an economizer is installed using a single enthalpy sensor, change configuration I.D. 1, the second character, to "S". TABLE 29 580730 Units With BACnet Module Settings Para Factory meter Setting Setting Description Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 137 65 Sets the backup occupied heating set point to 65F. TABLE 33 580685 LGH/LCH 152U4E (2-Compressor) Staged Direct Drive Para Factory meter Setting Field Setting Description Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 12 5000 CFM CFM Blower CFM during smoke detection. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > BLOWER > SPEEDS) 5000 CFM CFM Blower CFM during heating. 5000 CFM Blower CFM during high speed CFM cooling (2 compressor) operation. Use menu SETUP > NETWORK INTEGRATION. Set "BACNET" and network address. BACNET MAC ADDRESS: TABLE 30 580732 Units With Room Sensor, CPC/LSE Gateway Settings Use menu SETUP > NETWORK INTEGRATION. Set "L CONNEC TION" and network address. LCONN ADDRESS: 3250 CFM Blower CFM during low speed CFM cooling (1 compressor) operation. 5000 CFM CFM Blower CFM during ventilation. 1655 RPM Adjust RPM based on unit static RPM* and blower tables to reach tar get CFM. *Once all four blower settings are entered, the target (highest of the heating and cooling settings) CFM will be displayed. Once the RPM is saved for the target CFM, all other blower RPM values are set by the Unit Controller according to the field CFM setting.. TABLE 31 580735 Units with BACnet Module (Target) Settings Use menu SETUP > NETWORK INTEGRATION. Set "BACNET" and network address. BACNET MAC ADDRESS: Para Factory meter Setting Setting Description Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 91 120 Sets the compressor minimum run time to 2 minutes. 106 99 Set reheat SP from connected sensor to 99% to basically disable. Reheat will be controlled over by BAS. Only applies to units with the reheat option. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > DAMPER) 0% % Damper min. position during LOW blower operation. 0% % Damper min. position during HIGH blower operation. 50% % Min. damper % for stage 1 pow er exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETERS 29 101% %Open Damper minimum position during G blower operation. (Setting para meter 29 to "101" disables para meter 29 and passes control to parameter 9 or 132) 216 5% % Deadband % for stage 1 power exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETER 111 3 117 0 153 60 Thermostat with three cooling stages. DCV max. open damper. 0=controlled by network. Time delay between heating and cool ing mode. 85 40°F 86 40°F Compressor 1 low temp lockout. °F Settings lower than 40°F could void warranty. Compressor 2 low temp lockout. °F Settings lower than 40°F could void warranty. Page 43 TABLE 34 580682 LGH/LCH092H4M, 102H4M, 120H4M, 150H4M (2-Compressor) Staged Belt Drive Para Factory Setting meter 092 102 120 150 Field Setting Description Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 12 3000 CFM 3400 CFM 4000 CFM 5000 CFM CFM Blower CFM during smoke detection. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > BLOWER > SPEEDS) 3000 CFM 3400 CFM 4000 CFM 5000 CFM CFM Blower CFM during heating. 2700 CFM 2200 CFM 3600 CFM 4500 CFM CFM Blower CFM during high speed (2 compressor) cooling. 1950 CFM 3050 CFM 2600 CFM 3250 CFM CFM Blower CFM during low speed (1 compressor) cooling. 3000 CFM 3400 CFM 4000 CFM 5000 CFM CFM Blower CFM during ventilation. *Once all four blower settings are entered, the target (highest of the heating and cooling settings) CFM will be displayed. Once the target CFM is saved, all other blower CFM are set by the Unit Controller. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > DAMPER) 0% 0% 0% 0% % Damper min. position during LOW blower operation. 0% 0% 0% 0% % Damper min. position during HIGH blower operation. 50% 50% 50% 50% % Min. damper % for stage 1 power exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETERS 29 101% 101% 101% 101% %Open Damper minimum position during G blower operation. (Setting parameter 29 to "101" disables parameter 29 and passes control to parameter 9 or 132) 216 5% 5% 5% 5% % Deadband % for stage 1 power exhaust operation. TABLE 35 580686 LGH/LCH094U4M, 122U4M, 152U4M (2-Compressor) Staged Belt Drive Paramet er Factory Setting 094 122 152 Field Setting Description Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 12 3000 CFM 4000 CFM 5000 CFM CFM Blower CFM during smoke detection. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > BLOWER > SPEEDS) 3000 CFM 4000 CFM 5000 CFM CFM Blower CFM during heating. 2700 CFM 3600 CFM 4500 CFM CFM Blower CFM during high speed (2 compressor) cooling. 1950 CFM 2600 CFM 3250 CFM CFM Blower CFM during low speed (1 compressor) cooling. 3000 CFM 4000 CFM 5000 CFM CFM Blower CFM during ventilation. *Once all four blower settings are entered, the target (highest of the heating and cooling settings) CFM will be displayed. Once the target CFM is saved, all other blower CFM are set by the Unit Controller. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > DAMPER) 0% 0% 0% % Damper min. position during LOW blower operation. 0% 0% 0% % Damper min. position during HIGH blower operation. 50% 50% 50% % Min. damper % for stage 1 power exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETERS 29 101% 101% 101% Damper minimum position during G blower operation. (Setting paramet %Open er 29 to "101" disables parameter 29 and passes control to parameter 9 or 132) 216 5% 5% 5% % Deadband % for stage 1 power exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETER 85 40°F 40°F 40°F Compressor 1 low temp lockout. Settings lower than 40°F could void °F warranty. 86 40°F 40°F 40°F °F Compressor 2 low temp lockout. Settings lower than 40°F could void warranty. Page 44 TABLE 36 580683 LGH/LCH 094U4E (2-Compressor) Staged Direct Drive Para met er Factory Setting Field Setting Description Note: Any changes to Smoke CFM setting must be adjusted be fore the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 12 3000 CFM CFM Blower CFM during smoke detection. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > BLOWER > SPEEDS) 3000 CFM CFM Blower CFM during heating. 3000 CFM Blower CFM during high speed CFM cooling (2 compressor) operation. 1950 CFM Blower CFM during low speed CFM cooling (1 compressor) operation. 3000 CFM CFM Blower CFM during ventilation. 1195 RPM Adjust RPM based on unit static RPM* and blower tables to reach tar get CFM. *Once all four blower settings are entered, the target (highest of the heating and cooling settings) CFM will be displayed. Once the RPM is saved for the target CFM, all other blower RPM values are set by the Unit Controller according to the field CFM setting.. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > DAMPER) 0% % Damper min. position during LOW blower operation. 0% % Damper min. position during HIGH blower operation. 0% % Power exhaust position during HIGH blower operation. SETTINGS > RTU OPTIONS > EDIT PARAMETERS 29 101% %Open Damper minimum position during G blower operation. (Setting para meter 29 to "101" disables para meter 29 and passes control to parameter 9 or 132) 216 5% % Deadband % for stage 1 power exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETER 85 40°F Compressor 1 low temp lockout. °F Settings lower than 40°F could void warranty. 86 40°F Compressor 2 low temp lockout. °F Settings lower than 40°F could void warranty. TABLE 37 580731 Units With Automated Logic DDC (Target) Settings Para Factory Field meter Setting Setting Description Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 91 120 Compressor minimum run time. 111 3 Thermostat with three cooling stages. 118 400 119 2000 139 74 Damper "start open" CO2 setpoint for DCV. Damper "full open" CO2 setpoint for DCV. Backup occupied cooling setpoint. 153 60 Time delay between heating and cooling mode. TABLE 38 580734 Units With Hot Gas Reheat Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS Para Factory Field meter Setting Setting Description 105 6 Hot Gas Reheat Option 6: Reheat is only possible if blower is energized dur ing occupied periods. Controlled by RH sensor (A91) connected to input A55_P298_5 and set point set at para meter 106 (default 60%). TABLE 39 580743 Units With LonTalk Settings Use menu SETUP > NETWORK INTEGRATION. Set "LONTALK". Page 45 TABLE 40 580684 LGH/LCH 122U4E (2-Compressor) Staged Direct Drive Para met er Factory Setting Field Setting Description Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS 12 4000 CFM CFM Blower CFM during smoke detection. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > BLOWER > SPEEDS) 4000 CFM CFM Blower CFM during heating. 4000 CFM Blower CFM during high speed CFM cooling (2 compressor) operation. 2600 CFM Blower CFM during low speed CFM cooling (1 compressor) operation. 4000 CFM CFM Blower CFM during ventilation. 1425 RPM Adjust RPM based on unit static RPM* and blower tables to reach tar get CFM. *Once all four blower settings are entered, the target (highest of the heating and cooling settings) CFM will be displayed. Once the RPM is saved for the target CFM, all other blower RPM values are set by the Unit Controller according to the field CFM setting.. SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > DAMPER) 0% % Damper min. position during LOW blower operation. 0% % Damper min. position during HIGH blower operation. 50% % Min. damper % for stage 1 pow er exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETERS 29 101% %Open Damper minimum position during G blower operation. (Setting para meter 29 to "101" disables para meter 29 and passes control to parameter 9 or 132) 216 5% % Deadband % for stage 1 power exhaust operation. SETTINGS > RTU OPTIONS > EDIT PARAMETER 85 40°F Compressor 1 low temp lockout. °F Settings lower than 40°F could void warranty. 86 40°F Compressor 2 low temp lockout. °F Settings lower than 40°F could void warranty. Page 46 Configuration ID 1 1 2 3 4 5 6 7 8 Humiditrol [1] Not Installed = N Humiditrol Installed = H Unconfigured = U Economizer [2] Not Installed = N Motorized Outdoor Air Damper Only = M Economizer - Temperature = T Economizer Global = G Economizer - Single Enthalpy = S Economizer - Dual Enthalpy = D Unconfigured = U Power Exhaust [3] Not Installed = N Single-Stage = S Dual-Stage = D Unconfigured = U Power Exhaust Control 4] Not Installed = N Damper Position = A [8] Outdoor Air CFM Control N = Not applicable (for future use) [7] Advance Air Flow Control N = Not Installed S = Installed with Standard Economizer L = Installed with High Performance Economizer U = Unconfigured [6] Blower Variable Frequency Drive Bypass N = Not Installed A = Automatic Bypass M = Manual Bypass U = Unconfigured [5] Network Module N = Not Installed B = BACnet L = LonTalk (Lennox) FIGURE 39 Page 47 Configuration ID 2 1 2 3 4 5 6 7 8 9 Air Flow Proving [1] Switch (S52) Not Installed = N Installed on M3 = C Installed on DDC Controller = D [9] Electric Heat (Field-Installed) N = Not Installed Y = Installed Dirty Filter Switch (S27) [2] Not Installed = N Installed on M3 = C Overflow Switch [3] (S149 / S179) Not Installed = N Installed on DI-2 = 2 Installed on DI-3 = 3 [8] Load Shedding N = Not Installed G = Global (P297 - pin 9) L = Installed on DI-2 U = Installed on DI-3 [7] Zone Bypass Damper N = Not Installed Y = Installed Motor Overload [4] Switch (S42) Not Installed = N Installed on DI-2 = 2 Installed on DI-3 = 3 * When Phase / Voltage detection monitoring is enabled on a three-phase system and configured incorrectly will result in the system going into de mand hold status and then restart after three minutes. [6] Ultra Violet Lamp N = Not Installed Y = Installed [5] Phase / Voltage Detection * N = Not Installed 1 = Enabled Internal (Lennox) 2 = External (A42) Phase Detection on DI-2 3 = External (A42) Phase Detection on DI-3 FIGURE 40 Page 48Acrobat Distiller 10.1.16 (Windows)