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RTU OPEN CONTROLLER SYSTEM —

The RTU Open

controller is an integrated component of the Bryant rooftop unit.

Its internal application programming provides optimum perfor-

mance and energy efficiency. The RTU Open controller enables

the unit to run in 100% stand-alone control mode or a Third Party

Building Automation System (BAS). On-board DIP switches al-

low you to select your protocol (and baud rate) of choice among

the four most popular protocols in use today: BACnet

, Modbus

Johnson N2 and LonWorks

(see Fig. 66).

The RTU Open controller is factory-mounted in the 580J unit’s

main control box, to the left of the CTB. See Fig. 67 -71. Factory

wiring is completed through harnesses connected to the CTB.

Field connections for RTU Open sensors will be made at the PCB

connectors on the RTU Open board. The factory-installed RTU

Open controller includes the supply-air temperature (SAT) sensor.

The outdoor air temperature (OAT) sensor is included in the FIOP/

accessory EconoMi$er2 package.

Refer to Table 24, RTU Open Controller Inputs and Outputs for

locations of all connections to the RTU Open board. See Fig. 67-

71 for wiring diagrams.

Fig. 66 — RTU Open Multi-Protocol Control Board

1. BACnet is a registered trademark of ASHRAE (American Society

of Heating, Refrigerating and Air-Conditioning Engineers).

2. Modbus is a registered trademark of Schneider Electric.
3. LonWorks is a registered trademark of Echelon Corporation.

J22

J17

J19

J14

J11

J22

J12

J15

J20

Network Comm

Confi

urab

le - Input_

24 V

Confi

urab

le - Input_5

24 V

Confi

urab

le - Input_

24 V

Input_9 (Humidi

tat)

24 V

Input _

(Enthalp

O-1 (ECON)

Gnd

(O
A

)

Gnd

(

AT
)

Input_5 (

MK)

Input_4

(R)

BO-5

(Y1)

BO-4

(Y2)

BO-

(W1)

BO-2

(W2)

BO-1

(G)

Gnd

Input_

(X)

C
IN

+24 VDC

Input_2 (CO2/RH)

Gnd

+24 VDC

Input_1 (CO2/RH)

Gnd

Board Power

(AO-1)

0-10VDC

4-20mA

BO-6
(H) Dehumidification

BO-7
(Rever

Valve/Hi

peed Fan/Y

)

BO-

(Power Exhau

LonWork

Option Card
Port

Example

et for

BACnet M

/TP

and 76.

K baud

(1, 2, and 4 ON)

Protocol

elector

PT (temp input)

BACnet, Modbu

, or N2

(LON connection J15)

PT (common)

PT (off

et input)

Remove

both for 0-5V

AO-2

GND

(2-10V)

-Volt

Lithium
Battery

BO-1

BO-2

BO-

BO-4

BO-5

BO-6

BO-7

BO-

VFD Output

Содержание 580J*16D Series

Страница 1: ...mbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signi fies hazards which could result in personal injury or death CAU TION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced in stallation reliability or operation...

Страница 2: ...lding Check that all openings in the outside wall around the vent and air intake pipe s are sealed to prevent infiltration of combustion products into the building Check that furnace vent and air intake terminal s are not obstructed in any way during all seasons CAUTION Failure to follow this caution may result in personal injury Sheet metal parts may have sharp edges or burrs Use care and wear ap...

Страница 3: ... 08 12 Coil Options For Round Tube Plate Fin Condenser Coil Models Only Outdoor Indoor Hail Guard A Al Cu Al Cu B Precoat Al Cu Al Cu C E coat Al Cu Al Cu D E coat Al Cu E coat Al Cu E Cu Cu Al Cu F Cu Cu Cu Cu M Al Cu Al Cu Louvered Hail Guard N Precoat Al Cu Al Cu Louvered Hail Guard P E coat Al Cu Al Cu Louvered Hail Guard Q E coat Al Cu E coat Al Cu Louvered Hail Guard R Cu Cu Al Cu Louvered H...

Страница 4: ...4 Fig 2 Unit Dimensional Drawing Sizes 08 09 and 12 ...

Страница 5: ...5 Fig 2 Unit Dimensional Drawing Sizes 08 09 and 12 cont ...

Страница 6: ...6 Fig 3 Unit Dimensional Drawing Size 14 ...

Страница 7: ...7 Fig 3 Unit Dimensional Drawing Size 14 cont ...

Страница 8: ...8 Fig 4 Unit Dimensional Drawing Size 16 ...

Страница 9: ...9 Fig 4 Unit Dimensional Drawing Size 16 cont ...

Страница 10: ...14 Special Surface behind servicer is grounded e g metal masonry wall Surface behind servicer is electrically non conductive e g wood fiberglass Check for sources of flue products within 10 ft of unit fresh air intake hood C 36 914 18 457 Side condensate drain is used Minimum clearance D 48 1219 42 1067 36 914 Special No flue discharge accessory installed surface is combustible material Surface be...

Страница 11: ... 1 2 m from any adjacent building or per local code Locate the flue assembly at least 10 ft 3 05 m from an adjacent unit s fresh air intake hood if within 3 ft 0 91 m of same elevation or per lo cal code When unit is located adjacent to public walkways flue assembly must be at least 7 ft 2 1 m above grade Select a unit mounting system that provides adequate height to allow installation of condensa...

Страница 12: ...d di mensions are shown in Fig 2 4 Assemble and install accessory roof curb in accordance with instructions shipped with the curb Curb should be level This is necessary for unit drain to func tion properly Unit leveling tolerances are show in Fig 7 Refer to Accessory Roof Curb Installation Instructions for additional infor mation as required Fig 7 Unit Leveling Tolerances NOTE The gasketing of the...

Страница 13: ... A 580J D F K M 900 408 970 440 980 444 1075 487 1305 592 Economizer Vertical 75 34 75 34 75 34 75 34 130 47 Horizontal 122 55 122 55 122 55 122 55 242 110 Perfect Humidity System 80 36 80 36 80 36 85 39 90 41 Powered Outlet 35 16 35 16 35 16 35 16 35 16 Curb 14 in 356 mm 143 65 143 65 143 65 143 65 180 82 16 in 610 mm 245 111 245 111 245 111 245 111 255 116 ...

Страница 14: ...AUTHORIZATION OF CARRIER CORPORATION 1 DEC 2 DEC 3 DEC ANG MATERIAL AUTHORIZATION NUMBER TITLE 1041738 CURB ASY ROOF ENGINEERING 004 007 ENGINEERING REQUIREMENTS SIZE DRAWING NUMBER REV T 005 Y 002 DRAFTER CHECKER D 48TC400427 B WEIGHT MMC 06 17 11 SHEET 5 OF 5 SURFACE FINISH MFG PURCH MODEL INTERNAL USE ONLY NEXT DRAWING SCALE DISTRIBUTION PURCH N A MMC NOTES 1 ROOFCURB ACCESSORY IS SHIPPED DISAS...

Страница 15: ...15 Fig 9 580J 16 Roof Curb Details ...

Страница 16: ...onal information Lifting holes are provided in base rails as shown in Fig 10 Re fer to rigging instructions on unit Rigging materials under unit cardboard or wood to prevent base pan damage must be removed PRIOR to placing the unit on the roof curb When using the standard side drain connection ensure the red plug in the alternate bottom connection is tight Do this before setting the unit in place ...

Страница 17: ...tion Dimensions Size 16 Shown If the alternative condensate drain location through the bottom of the unit is used in conjunction with a retrofit curb the hole in the curb must be moved 12 5 in 320 mm towards the duct end of the unit See Fig 12 Although unit is weatherproof guard against water from higher level runoff and overhangs Remove all shipping materials and top skid Remove extra cen ter pos...

Страница 18: ... also attached to the damper using two plastic tie wraps 2 To gain access to the hood remove the filter access panel See Fig 14 3 Locate the 2 screws holding the metal tray to the basepan and remove Locate and cut the 2 plastic tie wraps securing the assembly to the damper see Fig 15 Be careful to not damage any wiring or cut tie wraps securing any wiring The indoor coil access panel will be used ...

Страница 19: ...oil access panel will be used as the top of the hood Remove the screws along the sides and bottom of the indoor coil access panel See Fig 17 2 Swing out indoor coil access panel and insert the hood sides under the panel hood top Use the screws provided to at tach the hood sides to the hood top Use screws provided to attach the hood sides to the unit See Fig 18 3 Remove the shipping tape holding th...

Страница 20: ...r rack for the aluminum filter Fig 20 Indoor Coil Access Panel Relocation Size 16 Shown Fig 21 Economizer Hood Construction Size 16 Shown 5 Open the filter clips which are located underneath the hood top Insert the aluminum filter into the bottom filter rack hood divider Push the filter into position past the open filter clips Close the filter clips to lock the filter into place See Fig 22 6 Caulk...

Страница 21: ...ions in the accessory kit to make initial readjustment Table 6 Liquid Propane Manifold Pressure Ranges Install a gas supply line that runs to the unit heating section Refer to the NFPA 54 NFGC or equivalent code for gas pipe siz ing data Do not use a pipe size smaller than 1 2 in Size the gas supply line to allow for a maximum pressure drop of 0 5 in wg 124 Pa between gas regulator source and unit...

Страница 22: ...d in transit 3 Remove connector plate assembly from the L bracket and discard the L bracket but retain the washer head screws and the gasket located between the L bracket and the con nector plate assembly NOTE Take care not to damage the gasket as it is reused in the following step 4 Place the gasket over the embossed area in the basepan aligning the holes in the gasket to the holes in the basepan...

Страница 23: ...erve local codes per taining to gas pipe installations Refer to the NFPA 54 ANSI Z223 1 NFGC latest edition in Canada CAN CSA B149 1 In the absence of local building codes adhere to the following perti nent recommendations 1 Avoid low spots in long runs of pipe Grade all pipe 1 4 in in every 15 ft 7 mm in every 5 m to prevent traps Grade all horizontal runs downward to risers Use risers to con nec...

Страница 24: ...line is installed downstream from the external trap pitch the line away from the unit at 1 in per 10 ft 25 mm in 3 m of run Do not use a pipe size smaller than the unit connection 3 4 in Step 12 Make Electrical Connections NOTE Field supplied wiring shall conform with the limita tions of minimum 63 F 33 C rise FIELD POWER SUPPLY SIZES 08 14 If equipped with optional Powered Convenience Outlet The ...

Страница 25: ... the power entry in the corner post of the unit see Fig 39 and 40 to either the factory op tion disconnect or the bottom of the control box 1 in conduit is provided wrapped around compressor A second conduit is pro vided with factory installed powered convenience outlet For those units that require conduit larger than 1 in it must be field sup plied Fig 39 and 40 show the wire routings Fig 39 Cond...

Страница 26: ...t connection points Make field power connections directly to line connection pressure lugs only Fig 43 Disconnect Switch and Unit UNITS WITH FACTORY INSTALLED NON FUSED DISCONNECT The factory installed option non fused dis connect NFD switch is located in a weatherproof enclosure lo cated under the main control box The manual switch handle and shaft are shipped in the disconnect enclosure Assemble...

Страница 27: ...nit front panel UNITS WITHOUT FACTORY INSTALLED NON FUSED DISCONNECT When installing units provide a disconnect switch per NEC National Electrical Code of ade quate size Disconnect sizing data is provided on the unit informa tive plate Locate on unit cabinet or within sight of the unit per national or local codes Do not cover unit informative plate if mounting the disconnect on the unit cabinet Fi...

Страница 28: ...control box The kit includes the hinged cover a backing plate and gasket On units with a factory installed direct digital controller or RTU Open controller the weatherproof cover kit is secured to the basepan underneath the control box See Fig 50 Disconnect All Power To Unit and Convenience Outlet Lock Out and Tag Out All Power Remove the blank cover plate at the convenience outlet discard the bla...

Страница 29: ...line phasing if the GFCI receptacle does not trip as required Press the RESET button to clear the tripped condition Unit mounted convenience outlets Outlets will often require that two disconnects be opened to de energize all power to the unit Treat all units as electrically energized until the convenience outlet power is also checked and de energization is confirmed Observe National Electrical Co...

Страница 30: ...er to the accessory installation instructions for information on routing power and control wiring Fig 54 Field Control Wiring Raceway 08 14 Only FACTORY OPTION THRU BASE CONNECTIONS ELECTRICAL CONNECTIONS SIZE 16 This service connection kit consists of a 1 2 in electrical bulkhead con nector and a 1 1 2 in electrical bulkhead connector connected to an L bracket covering the embossed raised section...

Страница 31: ...he bottom left side of the control box after removing one of the two knockouts in the corner of the box Use a connector at the control box to protect the wire as it passes into the control box Pull the wires over to the terminal strip at the upper left corner of the Cen tral Terminal Board CTB Use the connector at the control box and the wire tie to take up any slack in the thermostat wire to ensu...

Страница 32: ...32 Fig 58 580J 08 14 Typical Perfect Humidity Dehumidification System Humidistat Wiring ...

Страница 33: ...33 Fig 59 580J 16 Typical Perfect Humidity Dehumidification System Humidistat Wiring ...

Страница 34: ...nsors User Interface Provides status for normal operation setup pa rameters checkout tests and alarm and error conditions with a 2 line 16 character LCD display and four button keypad Electrical Rated Voltage 20 to 30 Vac RMS 50 60 Hz Transformer 100 va maximum system input Nominal Power Consumption at 24 Vac 60 Hz 11 5 VA without sensors or actuators Relay Digital Output Rating at 30 Vac maximum ...

Страница 35: ...inal Block IAQ 2 10 2 10 vdc Air Quality Sensor Input e g CO2 sensor IAQ COM COM Air Quality Sensor Common IAQ 24V 24 vac Air Quality Sensor 24 vac Source ACT 2 10 2 10 vdc Damper Actuator Output 2 10 vdc ACT COM COM Damper Actuator Output Common ACT 24v 24 vac Damper Actuator 24 vac Source NA AUX2 OCC E GND EXH1 AUX1 O Y2 Y1 Y2 O Y1 O C R 50048848 002 Rev A NA A2 OC C EX A1 Y2I Y2O Y1I Y1O C R Ce...

Страница 36: ...en working with Setpoints System and Advanced Settings Checkout tests and Alarms 1 Navigate to the desired menu 2 Press the Enter button to display the first item in the currently displayed menu 3 Use the and buttons to scroll to the desired parameter 4 Press the Enter button to display the value of the cur rently displayed item 5 Press the button to increase change the displayed pa rameter value ...

Страница 37: ...OUTPUT Cool stage 1 Relay Output to stage 1 mechanical cooling Y1 OUT terminal COOL Y2 IN OFF ON OFF SECOND STAGE COOLING DEMAND Y2 IN Y2 I signal from space thermostat our unitary controller for second stage cooling ON 24 Vac on terminal Y2 I OFF 0 Vac on terminal Y2 I COOL Y2 OUT OFF ON OFF SECOND STAGE COOLING RELAY OUTPUT Cool Stage 2 Relay Output to mechanical cooling Y2 OUT terminal MA TEMP ...

Страница 38: ...s NOT connected VENTMAX With 2 speed fan units VENTMAX L low speed fan and VENTMAX H high speed fan settings are required 2 8 V 2 to 10 Vdc DCV MAXIMUM DAMPER POSITION Displays only if a CO2 sensor is connected Used for Vbz ventilation max cfm setpoint Displays 2 to 10 V if 3 sensors RA OA and MA In AUTO mode dampers controlled by CFM 100 to 9990 cfm increment by 10 If OA MA RA and CO2 sensors are...

Страница 39: ...to factory defaults when set to YES LCD will briefly flash YES and change to NO but all parameters will change to the fac tory default values NOTE RECHECK AUX2 IN and FANTYPE for required 2 speed values ADVANCED SETUP MA LO SET 45 F 35 to 55 F Incremented by 10 SUPPLY AIR TEMPERATURE LOW LIMIT Temperature to achieve Freeze Protection close damper and alarm if temperature falls below setup value FR...

Страница 40: ... or signals an ERV that the conditions are not good for economizing but are for ERV operation SYS 24 Vac out Issues a system alarm CONNECT EXH1 N A N A Closes the power exhaust fan 2 relay EXH1 ALARMS Alarms display only when they are active The menu title ALARMS includes the number of active alarms in parenthesis When using SYLK bus sensors SYLK will appear on the screen and when using 20k OA tem...

Страница 41: ...s not displayed if a Return Air differential temperature sensor or an Outdoor Air enthal py sensor is connected 4 SYSTEM SETUP parameters must be configured as noted for 2 Speed unit operation EQUIPMENT CONV AUX2 I W FAN SPEED 2SPEED MENU PARAMETER PARAMETER DEFAULT VALUE PARAMETER RANGE AND INCREMENT NOTES ALARMS CONT SHUTDOWN ACTIVE N A N A AUX2 IN is programmed for SHUTDOWN and 24 V has been ap...

Страница 42: ...T MIN VMAX HS VENT MAX VMAX HS 2 VENT MIN H VMAX HS VENT MAX H VMAX LS VENT MIN L N A VENT MAX L N A DEMAND CONTROLLED VENTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED NONE NO OFF OFF HIGH 0v Off 0v Off MIN POS Closed ON OFF HIGH 24v On 0v Off MIN POS Closed ON ON HIGH 24v On 24v On MIN POS Closed NONE YES OFF OFF HIGH 0v Off 0v Off MIN POS Closed ON ...

Страница 43: ...4v On 0v Off MIN POS to Full Open Closed to Full Open DEMAND CONTROLLED VENTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 Set No OFF OFF HIGH 0v Off 0v Off VENTMIN Closed ON OFF HIGH 24v On 0v Off VENTMIN Closed ON ON HIGH 24v On 24v On VENTMIN Closed Yes OFF OFF HIGH 0v Off 0v Off VENTMIN Closed ON OFF HIGH 0v Off 0v Off VENTMIN to Full Open...

Страница 44: ... ON HIGH 24v On 24v On VENTMIN to VENTMAX Closed Yes OFF OFF LOW 0v Off 0v Off VENTMIN to VENTMAX Closed ON OFF LOW 0v Off 0v Off VENTMIN to Full Open Closed to Full Open ON ON HIGH 24v On 0v Off VENTMIN to Full Open Closed to Full Open DEMAND CONTROLLED VENTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED NO CO2 SENSOR NO OFF OFF LOW 0v Off 0v Off MIN PO...

Страница 45: ...y fan and controls the OA damper to the required position see Table 23 Table 23 Fan Speed The W heating mode is not controlled by the W7220 but it re quires the status to know where to position the OA damper for minimum position for the fan speed The 2 speed fan delay is available when the system is pro grammed for 2 speed fan in the System Setup menu item The 2 speed fan delay is defaulted to 5 m...

Страница 46: ...e time of installa tion or at any time during the operation of the system as a test that the system is operable TROUBLESHOOTING Alarms The economizer module provides alarm messages that display on the 2 line LCD NOTE Upon power up the module waits 60 minutes before checking for alarms This allows time for all the configured devices e g sensors actuator to become operational The excep tion is the S...

Страница 47: ...24 RTU Open Controller Inputs and Outputs for locations of all connections to the RTU Open board See Fig 67 71 for wiring diagrams Fig 66 RTU Open Multi Protocol Control Board 1 BACnet is a registered trademark of ASHRAE American Society of Heating Refrigerating and Air Conditioning Engineers 2 Modbus is a registered trademark of Schneider Electric 3 LonWorks is a registered trademark of Echelon C...

Страница 48: ...48 Fig 67 580J 08 12N P Typical RTU Open System Control Wiring Diagram ...

Страница 49: ...49 Fig 68 580J 08 14 Typical RTU Open System Control Wiring Diagram ...

Страница 50: ...50 Fig 69 580J 16 Typical RTU Open System Control Wiring Diagram ...

Страница 51: ...51 Fig 70 580J 8 14 Typical RTU Open System Control Wiring Diagram with Perfect Humidity System ...

Страница 52: ...52 Fig 71 580J 16 Typical RTU Open System Control Wiring Diagram with Perfect Humidity System ...

Страница 53: ... and 8 Binary Input 9 Zone Temperature n a n a J13 1 4 Rnet CONFIGURABLE INPUTS4 Indoor Air CO2 iaq AI 4 20 mA J4 2 and 3 or J4 5 and 6 Analog Input 2 Outdoor Air CO2 oaq AI 4 20 mA Analog Input 1 Space Relative Humidity space_rh AI 4 20 mA Analog Input 10 Supply Fan Status2 sfan_status BI 24 VAC J5 1 and 2 or J5 3 and 4 J5 5 and 6 or J5 7 and 83 Binary Input 3 5 8 or 9 except where intrinsic inpu...

Страница 54: ...ss the control wires through the hole provided in the corner post then feed the wires thorough the raceway to the RTU Open controller Connect to the wires to the removable PCB con nectors and then reconnect the connectors to the board Space Temperature SPT Sensors There are two types of SPT sensors available from Bryant resistive input non communi cating T55 T56 and T59 and Rnet communicating SPS ...

Страница 55: ... CO2 leaving the space The sensor should be mounted in a location to avoid direct breath contact Do not mount the IAQ sensor in drafty areas such as near sup ply ducts open windows fans or over heat sources Allow at least 3 ft 0 9 m between the sensor and any corner Avoid mounting the sensor where it is influenced by the supply air the sensor gives inaccurate readings if the supply air is blown di...

Страница 56: ...pace humidity sensor 33ZCSENSRH 01 or duct hu midity sensor 33ZCSENDRH 01 is used to measure the relative humidity of air within the space or return air duct The RH reading is used to control the Perfect Humidity option of the rooftop unit For wiring distances up to 500 ft 152 m use a 3 conductor 18 or 20 AWG shielded cable The shield must be removed from the sensor end of the cable and grounded a...

Страница 57: ... Power Exhaust output The relay used by the RTU Open board to control power exhaust is a dry contact which means it does not have 24vac This 24vac must be connected to the relay to allow it to operate the power exhaust relay in the PE accessory A 24vac source must be provided to J11 2 on the RTU Open control board This can be provided by the unit s transformer from various sources The R terminal o...

Страница 58: ...e link cable connects a USB port to the J12 local access port See Fig 87 RTU Open Troubleshooting Troubleshooting is accom plished by viewing the communication LEDs see Fig 66 The LEDs indicate if the controller is speaking to the devices on the network The LEDs should reflect communication traffic based on the baud rate set The higher the baud rate the more solid the LEDs will appear See Table 25...

Страница 59: ...ply Air and Return Air All components necessary for operation are factory provided and mounted The unit is factory configured for immediate smoke de tector shutdown operation additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements Units equipped with factory optional Return Air smoke detec tors re...

Страница 60: ...r and detector plate into its operating posi tion using screws from Step 1 See Fig 91 Step 3 5 Connect the flexible tube on the sampling inlet to the sam pling tube on the basepan ADDITIONAL APPLICATION DATA Refer to the appli cation data sheet titled Factory Installed Smoke Detector for Small and Medium Rooftop Units 2 to 25 Tons for discussions on additional control features of these smoke detec...

Страница 61: ...sensor CO2 sensor Louvered hail guard Phase monitor control Refer to separate installation instructions for information on in stalling these accessories Step 15 Check Belt Tension Measure the belt span length as shown in Fig 93 Calculate the required deflection by multiplying the belt span length by 1 64 For example if the belt span length is 32 inches 32 x 1 64 1 2 inch deflection BELT FORCE DEFL...

Страница 62: ...t Up This completes the mechanical installation of the unit Refer to the unit s Service Manual for de tailed Pre Start and Start Up instructions Download the latest ver sions from HVAC Partners www hvacpartners com Table 1 Table 2 BELT CROSS SECTION SMALLEST SHEAVE DIAMETER BELT DEFLECTION FORCE LBS UNNOTCHED BELTS NOTCHED BELTS USED NEW USED NEW A AX 3 0 3 6 3 7 5 5 4 1 6 1 3 8 4 8 4 5 6 8 5 0 7 ...

Страница 63: ...ks Y N _____ Check that indoor air filters are clean and in place Y N _____ Check that outdoor air inlet screens are in place Y N _____ Verify that unit is level Y N _____ Check fan wheels and propeller for location in housing orifice and verify setscrew is tight Y N _____ Verify that fan sheaves are aligned and belts are properly tensioned Y N _____ Verify that scroll compressors are rotating in ...

Страница 64: ...__________ F D Liquid line temperature at outlet or reheat coil _______________ F E Confirm correct rotation for compressor Y N _____ F Check for correct ramp up of outdoor fan motor as condenser coil warms Y N _____ 4 Check unit charge per charging chart Y N _____ Jumper 32L Motormaster temperature sensor during this check Remove jumper when complete 5 Switch unit to high latent mode sub cooler b...

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