background image

46

A

IR

 F

LOW

 D

ATA

NOTE: 

Airflow data shown applies to non-communicating mode operation only. For a fully communicating

system, please see the outdoor unit’s installation instructions for cooling and pump heating airflow data. See

ComfortNet™ System - Airflow Consideration

 section for details.

continuous fan speeds (25%, 50%, 75%, or 100%). " See installation manual 
for details"

*the “S” number refers to one of four labeled dip switch section each containing 4  
individual dip switches.  The following number refers to the individual labeled dip
switch within that section

  Model                 Tap      Low Stage          High Stage        Low Stage          High Stage
                                         Cool                    Cool                  Heat                    Heat 

A           520                   800                1210                  1725

B           715                   1100                1225                 1750

C           910                  1400                1245                 1775
D           1170                 1800                1260                 1800

A           553                    850                1085                 1550
B           748                   1150                1155                  1650
C           943                   1450               1225                 1750
D           1203                  1850               1260                 1800

A           390                  600                  875                 1250
B           520                  800                  945                 1350
C           715                  1100                 1015                  1450
D           910                  1400                1085                 1550

A           390                   600                 735                   1050
B           520                   800                 805                   1150
C           650                  1000                875                   1250
D           780                  1200                945                   1350

A           520                   800                945                  1350
B           715                   1100                1015                  1450
C           910                   1400               1085                 1550
D          1170                   1800               1155                  1650

A           520                   800                 1050                1500
B           715                   1100                 1120                 1600
C           910                   1400                1190                 1700
D           1170                  1800                1260                1800

Speed Selection Dip Switches

the corresponding tap (A, B, C, or D).  Set dip switches S3-1* and S3-2* to the 

appropriate ON / OFF positions. (2) Select model and desired High Stage Heating 

Airflow.  Determine the corresponding tap (A, B, C, or D).  Set dip switches S4-3* and 

S4-4* to the appropriate ON / OFF positions.  (3) Selecting Airflow Adjustment Factor:  

For 0% trim set S5-2* to OFF (trim disabled). If trim is desired set S5-2* to ON (trim 

enabled) and set S3-3* and S3-4* to appropriate ON / OFF positions. Tap A is +5%,

Tap B is -5%, Tap C is +10%, Tap D is -10%.

To Set Comfort Mode:  Select Desired Comfort Mode profile (see profiles above).  Set 

Profiles         Pre-Run                Short-Run              OFF Delay

   Cool             Adjust          Profile                Heat

Selection       Selection      Selection          Selection
 Switches       Switches       Switches          Switches 

   A       OFF     OFF    OFF    OFF     OFF    OFF       OFF      OFF

Dehumidification: To enable, set switch S5-1* to ON.  Cooling airflow will be reduced  

to 85% of nominal value during cool call.  To disable, set switch S5-1* to OFF.

D             30 sec/50%         7.5 min/82%            30 sec/50%

   D        ON      ON      ON      ON     ON      ON        ON        ON

B                 -------                30 sec/50%          60 sec/100%

   C       OFF      ON    OFF     ON     OFF     ON         OFF      ON

   B       ON      OFF     ON     OFF     ON     OFF        ON       OFF

TAP     S3- 1  S3- 2 S3- 3  S3- 4  S4-1    S4-2     S4- 3   S4- 4      

dip switches S4-1* and S4-2* to the appropriate ON / OFF positions.

A                 -------                   --------              60 sec/100%

C                 -------             7.5 min/82%            60 sec/100%

To Set Airflow: (1) Select model and desired High Stage Cooling Airflow.  Determine 

*DVC81005C***

*DVC80805C***

 *DVC80603B***

*MVC81005C***

*MVC80805C***

Continuous Fan Speed:   Set dip switches S5-3* and S5-4* to select one of 4

0140F01170

*MVC80604B***

Summary of Contents for DVC8

Page 1: ...ng Most dealers have a list of specific good safety practices follow them The precautions listed in this Installation Manual are intended as supplemental to existing practices However if there is a di...

Page 2: ...ITION 13 CHECK 6 DILUTION AIR 14 CHECK 7 COMPLETE THE INSTALLATION 14 FIX 1 LINER TERMINATION 14 FIX 2 CHANGE VENTING ARRANGEMENTS 14 FIX 3 REBUILD THE CROWN 15 FIX 4 RELINING 15 ELECTRICAL CONNECTION...

Page 3: ...MMUNICATING THERMOSTAT 33 NETWORK TROUBLESHOOTING 34 SYSTEM TROUBLESHOOTING 34 NORMAL SEQUENCE OF OPERATION 34 POWER UP 34 HEATING MODE 35 COOLING MODE 36 FAN ONLY MODE 36 OPERATIONAL CHECKS 36 SAFETY...

Page 4: ...furnace may be used as a construction site heater only if certain conditions are met These conditions are listed in the PRODUCT APPLICATION section of this manual TO PREVENT PERSONAL INJURY OR DEATH D...

Page 5: ...TO EXTREMELY LOW RETURN AIR TEMPERATURES AND EXPOSURE TO CORROSIVE OR VERY DIRTY ATMOSPHERES WARNING TO PREVENT PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION THIS FURNACE MUST BE CATEGORY I VENTED DO N...

Page 6: ...CAUTIONS NOTE Discharge body s static electricity before touching unit An electrostatic discharge can adversely affect electrical com ponents Use the following precautions during furnace installation...

Page 7: ...anual J Load Cal culations published by the Air Conditioning Contractors of America In the USA this furnace MUST be installed in accordance with the latest edition of the ANSI Z223 1 booklet entitled...

Page 8: ...g the furnace Ensure adequate combustion air is available for the furnace Improper or insufficient combustion air can expose building occupants to gas combustion products that could include carbon mon...

Page 9: ...3 Latest Edition Section 1 23 1 The following steps shall be followed with each appliance connected to the venting system placed in operation while any other appliances connected to the venting syste...

Page 10: ...the furnace area by means of ventilation grilles or ducts connecting directly to the outdoors or spaces open to the outdoors such as attics or crawl spaces CATEGORY I VENTING VERTICAL VENTING TO PREV...

Page 11: ...e power to furnace Counterflow units are shipped with the induced draft blower discharging from the top of the furnace Top as viewed for a counterflow installation Vent the furnace in accordance with...

Page 12: ...ghest connected equip ment draft hood outlet or flue collar Wash Clay Tile Size 8 x 8 x12 Each x 24 Length 1 2 to 1 Air Space Second Floor First Floor Attic Floor Roof Line Throat Damper Breech Clean...

Page 13: ...he lowest existing vent connector and examine the inside of the elbow or tee at the base of the liner Asmall amount of soot may be considered acceptable provided the installer vacuums it away If ruste...

Page 14: ...lly with a B Vent Under some conditions a 90 furnace could be installed rather than an 80 furnace The 90 furnace can be vented hori zontally or vertically through PVC pipe Next use a flashlight and sm...

Page 15: ...teel liners were developed for use with oil or solid fuel appliances They are not suitable for use with gas fired appliances Flexible liners specifically intended and tested for gas applications are l...

Page 16: ...val or routine maintenance JUNCTION BOX RELOCATION EDGES OF SHEET METAL HOLES MAY BE SHARP USE GLOVES AS A PRECAUTION WHEN REMOVING HOLE PLUGS WARNING Line voltage connections can be made through eith...

Page 17: ...facilitate use with most cooling equipment Consult the wiring diagram located on the blower compartment door for further details of 115 Volt and 24 Volt wiring NOTE For single stage cooling applicati...

Page 18: ...HUM TRIM ENABLE Move to the ON position to enable dehumidification ON OFF S5 FOSSIL FUEL APPLICATIONS This furnace can be used in conjunction with a heat pump in a fossil fuel application A fossil fue...

Page 19: ...feeding one of the HUM terminals with a field installed wire from the R terminal or by connecting to the NO side of the low fire pressure switch AUXILIARY ALARM SWITCH The control is equipped with a 2...

Page 20: ...TO ENSURE SAFE AND PROPER FURNACE OPERATION ALL CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE AGENCY This unit is configured for natural gas The appropriate manufacturer s propane...

Page 21: ...with masonry plaster or insulation or subjected to repeated wetting by liquids such as water except rain water detergents or sewage Gas line entrance Right side gas entrance alternate General Furnace...

Page 22: ...propane gas pressure must be 10 inch WC at the furnace manifold with all gas appliances in operation Maintaining proper gas pressure depends on three main factors 1 Vaporization rate depending on tem...

Page 23: ...at or cool position When the furnace is installed without a cooling coil it is rec ommended that a removable access panel be provided in the outlet air duct This opening shall be accessible when the f...

Page 24: ...EDURE AND ADJUSTMENT Furnace must have a 115 VAC power supply properly connected and grounded Proper polarity must be maintained for correct operation In addition to the following start up and adjustm...

Page 25: ...Ft until high capacity 100 is achieved Once achieved the display will show Ft without flashing A 5 minute timer will be started to al low sufficient opportunity for the gas pressure to be tested 5 If...

Page 26: ...10 0 w c Propane Gas Minimum 11 0 w c Maximum 13 0 w c INLET GAS SUPPLY PRESSURE If supply pressure differs from table make the necessary ad justments to pressure regulator gas piping size etc and or...

Page 27: ...cubic foot sec ft3 of gas being delivered to the furnace If the dial is a one cubic foot dial divide the number of seconds recorded in step 2 by one If the dial is a two cubic foot dial divide the num...

Page 28: ...ing 4 individual dip switches The following number refers to the individual labeled dip switch within that section Model Tap Low Stage High Stage Low Stage High Stage Cool Cool Heat Heat A 520 800 121...

Page 29: ...cooling air flow determined in step 2 and find the required cooling speed and adjustment setting Example A MVC80604BX furnace installed with a 2 5 ton air conditioning system The air flow needed is 10...

Page 30: ...demands are managed differently in a fully communi cating system than they are in a non communicating wired system The system operating mode as determined by the thermostat determines which unit calcu...

Page 31: ...thaComfortNet com patible heat pump in a fossil fuel application Afossil fuel applica tion refers to a combined gas furnace and heat pump installation which uses an outdoor temperature sensor to deter...

Page 32: ...ge AC ComfortNet G W1 W2 Y1 Y2 O 1 2 R C 4 Position Connectors from CTK0 Thermostat Kit System Wiring between Furnace and Non Communicating CompatibleSingleStageAirConditioner COMFORTNET SYSTEM ADVANC...

Page 33: ...difiable Model Number MOD NUM Displays the furnace model number Serial Number SER NUM Displays the furnace serial number Optional Software SOFTWARE Displays the application software revision IDENTIFIC...

Page 34: ...wards ground and when data 1 is decreasing towards ground data 2 is increasing towards 5V Typically the data 1 line is approximately 2 6Vdc and the data 2 transmission line is ap proximately 2 3Vdc Th...

Page 35: ...d Rapid Flashing Normal network traffc On Solid Data 1 Data 2 miss wire Possible Cause Corrective Action Comments None None None Communications Failure Depress Learn Button Verify that bus BIAS and TE...

Page 36: ...ontrol module performs safety circuit checks Outdoor fan and compressor are energized to their appropriate speed Circulator blower is energized on the appropriate cool speed at the level and time dete...

Page 37: ...t electrical components Use the following precautions during furnace installation and servicing to protect the integrated control module from dam age By putting the furnace the control and the person...

Page 38: ...ck for blockage and or leakage Check hose connections at and internal to furnace Wiring Check electrical connections for tightness and or corrosion Check wires for damage Filters FILTERS TO ENSURE PRO...

Page 39: ...in cleanout cable Attach a variable speed reversible drill to the other end of the cable Slowly rotate the cable with the drill and insert it into one of the heat exchanger tubes While reversing the d...

Page 40: ...Call for Service icon illuminated ComfortNet thermostat scrolls Check Furnace message E0 Furnace lockout due to an excessive number of ignition retries 3 total LOCKOUT E0 Failure to establish fame Ca...

Page 41: ...rs and ductwork for blockage Clean flters or remove obstruction Check circulator blower speed and performance Correct speed or replace blower motor if necessary Check burners for proper alignment Chec...

Page 42: ...d improperly Blocked fue and or inlet air pipe blocked drain system or weak induced draft blower Incorrect pressure switch set point or malfunctioning switch contacts Loose or improperly connected wir...

Page 43: ...ontrol module has lost communications with circulator blower motor MOTOR COMM b1 Loose wiring connection at circulator motor control leads Failed circulator blower motor Failed integrated control modu...

Page 44: ...t scrolls Check Furnace message b7 MOTOR PARAMS b7 Furnace operates at reduced performance or Integrated control module LED display provides b9 error code b9 LOW ID AIRFLOW B9 Blocked filters Restrict...

Page 45: ...D 115 VAC POLARITY DATANOT YET ON NETWORK INVALID MEMORYCARD DATA BLOWER MOTOR NOT RUNNING BLOWER COMMUNICATION ERROR BLOWER HP MIS MATCH BLOWER MOTOR OPERATING IN POWER TEMPERATURE OR SPEED LIMIT BLO...

Page 46: ...D Set dip switches S3 1 and S3 2 to the appropriate ON OFF positions 2 Select model and desired High Stage Heating Airflow Determine the corresponding tap A B C or D Set dip switches S4 3 and S4 4 to...

Page 47: ...D On On Add 5 Off Off Minus 5 On Off Add 10 Off On Minus 10 On On A Off Off B On Off C Off On D On On A Off Off B On Off C Off On D On On Disabled Off Enabled On Disabled Off Enabled On 25 Off Off 50...

Page 48: ...PU 3 IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF C USE COPPER CONDUCTORS ONLY RD INTEGRATED CONTR...

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