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18 

 18-CD31D1-5

Installer’s Guide

WARNING

!

FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result 

in serious injury, death or property damage.
Never test for gas leaks with an open flame.  Use a com-

mercially available soap solution made specifically for 

the detection of leaks to check all connections.  A fire or 

explosion may result causing property damage, personal 

injury, or loss of life.

GAS PIPING

WARNING

!

FIRE - EXPLOSION HAZARD

DO  NOT RUN FLEXIBLE GAS LINE THROUGH THE FUR-

NACE CABINET WALL.  FAILURE TO FOLLOW THIS WARN-

ING COULD RESULT IN PROPERTY DAMAGE, SERIOUS 

PERSONAL INJURY, OR DEATH.

This unit is shipped standard for left side installation of 

gas piping. A piping knockout is also provided in the right 

side for an alternate piping arrangement. The installation 

of piping shall be in accordance with piping codes and the 

regulations of the local gas company. Pipe joint compound 

must be resistant to the chemical reaction with liquefied pe-

troleum gases.  Refer to piping Table 10 for delivery sizes. 

NOTE:  Refer to local codes and the National Fuel Gas 

Code, current edition, for gas pipe requirements. 

 

The furnace and its individual shut-off valve must be 

disconnected from the gas supply piping system during any 

pressure testing of that system at test pressures in excess 

of 1/2 psig.
The furnace must be isolated from the gas supply piping 

by closing its individual manual shut-off valve during any 

pressure testing of the gas supply piping system at test 

pressures equal to or less than 1/2 psig.

CAUTION

!

Use a backup wrench on the gas valve when installing gas 

piping to prevent damage to the gas valve and manifold 

assembly.

NOTE:  

Maximum pressure to the gas valve for natural gas is 

13.8" W.C.  Minimum pressure is 5.0" W.C.  Maximum pres-

sure to the gas valve for propane is 13.8" W.C.   Minimum 

pressure is 11.0" W.C.
All gas fittings must be checked for leaks using a soapy 

solution before lighting the furnace.  DO NOT CHECK 

WITH AN OPEN FLAME!

The following warning complies with State of California law, Proposition 65.

Hazardous Gases!
Exposure to fuel substances or by-products of incomplete 

fuel combustion is believed by the state of California to 

cause cancer, birth defects, or other reproductive harm.

WARNING

!

COMBUSTION AND INPUT CHECK

  1.  Make sure all gas appliances are off except the furnace.
  2.  Clock the gas meter with the furnace operating (deter-

mine the dial rating of the meter) for one revolution.

  3.  Match the “Sec” column in the gas flow (in cfh) Table 13 

with the time clocked.

  4.  Read the “Flow” column opposite the number of sec-

onds clocked.

  5.  Use the following factors if necessary:
    For 1 Cu. Ft. Dial Gas Flow CFH = 

 

Chart Flow Reading ÷ 2

    For 1/2 Cu Ft. Dial Gas Flow CFH = 

 

Chart Flow Reading ÷ 4

    For 5 Cu. Ft. Dial Gas Flow CFH =  

 

10X Chart Flow Reading ÷ 4

WARNING

!

TO PREVENT AN EXPLOSION OR POSSIBLE INJURY, 

DEATH AND EQUIPMENT DAMAGE, DO NOT STORE COM-

BUSTIBLE MATERIALS, GASOLINE OR OTHER FLAM-

MABLE VAPORS OR LIQUIDS NEAR THE UNIT.

TOP VIEW

AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF

LEFT SIDE PIPING (STANDARD)

TOP VIEW OF RIGHT SIDE PIPING

RIGHT SIDE PIPING (OPTIONAL)

h

DRIP LEG

DRIP LEG

IMPORTANT:

A sediment trap must be installed in the gas line 
before the furnace gas valve.  The sediment trap 
must be located as close to the furnace cabinet 
as practical.  

Summary of Contents for *DD2B060A9V3VA

Page 1: ...Category I Venting Guide Pub No 18 CH23D1 latest version Horizontal Conversion for these furnaces may be left or right side rotation ALL phases of this installation must comply with NATIONAL STATE AN...

Page 2: ...temperature rise and venting according to the manufacturer s instructions 10 This product must be gas piped by a Licensed Plumber or Gas Fitter in the Commonwealth of Massachusetts Safety signal word...

Page 3: ...hese instructions Category I defined on page 13 CAUTION To prevent shortening its service life the furnace should not be used as a Construction Heater during the finish ing phases of construction unti...

Page 4: ...ONS ARE IN INCHES MODEL DIM A DIM B DIM C DIM D UD2B060A9V3VB UD2B080A9V3VB UD2B100A9V3VB 17 1 2 9 5 8 16 1 4 16 UD2C080A9V4VB UD2C080B9V4VB UD2C100A9V5VB UD2C100B9V5VB 21 13 1 16 19 3 4 19 1 2 UD2D12...

Page 5: ...h 1 Rev 0 DD2 9V OUTLINE DRAWING ALL DIMENSIONS ARE IN INCHES MODEL DIM A DIM B DIM C DIM D DD2B060A9V3VA DD2B080A9V3VA 17 1 2 9 5 8 16 1 4 16 DD2C100A9V5VA 21 13 1 16 19 3 4 19 1 2 DD2D120A9V5VA 24 1...

Page 6: ...The coil and furnace must be fully supported when used in the horizontal Three brackets with screws are included with downflow furnaces for installation to stabilize and secure the furnace and TXC cas...

Page 7: ...ated caulked vapor bar rier etc may need additional air provided as described for confined space Confined spaces are installations with less than 50 cu ft of space per 1000 BTU hr input from all equip...

Page 8: ...a utility room adjacent to the living area the system should be carefully designed with returns which minimize noise transmission through the return air grille Although these winter air condition ers...

Page 9: ...applications When the upflow furnace is installed in the horizontal right or left application and a close coupled less than 36 return duct is attached to the bottom side of the furnace as shown in Fi...

Page 10: ...or upflow 5 ton airflow models where the airflow requirement exceeds 1800 CFM Models will require re turn air openings and filters on 1 both sides or 2 one side and the bottom or 3 just the bottom The...

Page 11: ...the engagement hole in the blower deck and the lower pin screw rests against the side of the bottom panel See Figures 17 20 e Reinstall the furnace filter in the side position by inserting the chamfe...

Page 12: ...CUT ON LINE INSTALLING THE FILTER The filter may need to be cut to fit the unit depending on the location of the return air filter A score line and the words CUT HERE are located on the end of the fil...

Page 13: ...0X1 13 1 8 24 1 2 2 16X20X1 11 5 8 Location dimension is from end of duct to the screw holes for the bracket VENT PIPING These furnaces have been classified as Fan Assisted Combustion System Category...

Page 14: ...ight determined by National Fuel Gas Code or local codes It should be capped properly to prevent rain water from entering the vent Roof exit should be wa terproofed 7 Use type B double wall vent when...

Page 15: ...injury or death Make wiring connections to the unit as indicated on en closed wiring diagram As with all gas appliances using electrical power this furnace shall be connected into a permanently live e...

Page 16: ...16 18 CD31D1 5 Installer s Guide FIELD WIRING DIAGRAMS...

Page 17: ...18 CD31D1 5 17 Installer s Guide FIELD WIRING DIAGRAMS...

Page 18: ...N Use a backup wrench on the gas valve when installing gas piping to prevent damage to the gas valve and manifold assembly NOTE Maximum pressure to the gas valve for natural gas is 13 8 W C Minimum pr...

Page 19: ...high HI adjustment regulator cover screw a To increase outlet pressure turn the regulator ad just screw clockwise b To decrease outlet pressure turn the regulator ad just screw counterclockwise c Adj...

Page 20: ...YHALT Kit High Altitude Accessory Kit listed in PRODUCT DATA Installation of this furnace at altitudes above 2 000 ft 610m shall be in accordance with the local codes or in the absence of local codes...

Page 21: ...thermostat contacts close signaling the control module to run its self check routine After the control mod ule has verified that the 1st stage pressure switch contacts are open and the limit switch es...

Page 22: ...ng shutdown when the door is removed Operation with the door removed or ajar can permit the escape of dangerous fumes All panels must be securely closed at all times for safe operation of the furnace...

Page 23: ...ntrol module has shut the system down and gone into lockout the system must be manually reset before the unit will restart To reset turn the system power off then on then off and then on again within...

Page 24: ...h stuck closed 3 1st stage pressure switch is open not closing 4 Open thermal limit or open rollout 5 Open low voltage fuse 6 1st stage pressure switch opened 5 times within one cycle 1 hour lockout 7...

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