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507324-01

Page 25 of 32

Issue 1809

Table 7. Diagnostic Codes

Integrated Control Diagnostic Codes

LED Status

Fault Description

LED Off

No power to control or control hardware fault 

detected

LED On

Normal operation

1 Flash

Flame present with gas valve off

2 Flashes

Pressure switch closed with inducer off

3 Flashes

Pressure switch open with inducer on

4 Flashes

High limit switch open

5 Flashes

Rollout switch open

6 Flashes

Pressure switch cycle lockout

7 Flashes

Lockout due to no ignition

8 Flashes

Lockout due to too many flame dropouts

9 Flashes

Incorrect line voltage phasing

Unit Start-Up

FOR YOUR SAFETY READ BEFORE LIGHTING UNIT

Do  not  use  this  furnace  if  any  part  have  been 

underwater.  Immediately  call  a  licensed  professional 

service technician (or equivalent) to inspect the furnace 

and to replace any part of the control system and any 

gas control which has been underwater.

 WARNING

If overheating occurs or if gas supply fails to shut off, 

shut off the manual gas valve to the appliance before 

shutting off electrical supply.

 WARNING

Before  attempting  to  perform  any  service  or 

maintenance,  turn the electrical  power to unit OFF at 

disconnect switch.

 CAUTION

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.

The  gas  valve  on  this  unit  will  be  equipped  with  a  gas 

control  switch.  Use  only  your  hand  to  move  the  switch. 

Never use tools. If the switch will not turn or if the control 

switch will not move by hand, do not try to repair it.

Placing the Furnace into Operation

These  units  are  equipped  with  an  automatic  ignition 

system. Do not attempt to manually light burners on these 

furnaces.  Each  time  the  thermostat  calls  for  heat,  the 

burners will automatically light. The ignitor does not get hot 

when there is no call for heat on units with an automatic 

ignition system.

If  you  do  not  follow  these  instructions  exactly,  a  fire 

or  explosion  may  result  causing  property  damage, 

personal injury or death.

 WARNING

Gas Valve Operation

See Figure 33

1. 

STOP!

 Read the safety information at the beginning 

of this section.

2.  Set the thermostat to the lowest setting.
3.  Turn off all electrical power to the unit.
4.  This furnace is equipped with an ignition device which 

automatically lights the burners. Do not try to light the 

burners by hand.

5.  Remove the upper access panel.
6.  Move switch on gas valve to OFF. Do not force. See 

Figure 33.

7.  Wait  five  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 next step.

Figure 33. 

Gas Valve Shown in 

“ON” 

Position

8.  Move switch on gas valve to ON. Do not force. See 

Figure 33.

9.  Replace the upper access panel. 
10.  Turn on all electrical power to the unit.
11.  Set the thermostat to desired setting. 

NOTE: 

When unit is initially started, steps 1 through 

11 may need to be repeated to purge air from gas line.

12.  If the appliance will not operate, follow the instructions 

“Turning  Off  Gas  to  Unit”  and  call  your  service 

technician or gas supplier.

Summary of Contents for 801UH

Page 1: ...sonal injury or death Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Installation and service must be performed by a licen...

Page 2: ...ith optional RAB Return Air Base 3 Bottom return air 4 Return air from both sides 5 Bottom and one side return air 2 Flue outlet may be horizontal but furnace must be vented vertically 3 Optional exte...

Page 3: ...the vestibule area In order to ensure proper unit operation combustion and ventilation air supply must be provided according to the current National Fuel Gas Code Vent installations must be consistent...

Page 4: ...provided and sealed to the furnace Return air temperature range between 60 F 16 C and 80 F 27 C must be maintained Air filters must be installed in the system and must be maintained during constructi...

Page 5: ...hich can result in carbon monoxide In addition to providing combustion air fresh outdoor air dilutes contaminants in the indoor air These contaminants may include bleaches adhesives detergents solvent...

Page 6: ...the enclosure and one opening within 12 inches 305 mm of the bottom These openings must communicate directly or by ducts with the outdoors or spaces crawl or attic that freely communicate with the out...

Page 7: ...ack of the furnace Doing so will adversely affect the operation of the safety control devices which could result in personal injury or death WARNING The gas furnace can be installed as shipped in eith...

Page 8: ...and the platform to ensure that the furnace operates properly and safely The furnace is equipped with a removable bottom panel to facilitate installation Markings are provided on both sides of the fur...

Page 9: ...nd supply and return air plenums must be supported separately NOTE When the furnace is installed on a platform in a crawlspace it must be elevated enough to avoid water damage and to allow the evapora...

Page 10: ...e Use screws and joint tape to seal the return air system to the furnace Inplatforminstallationswithbottomreturnair thefurnace should be sealed airtight to the return air plenum A door must never be u...

Page 11: ...ut the house by the furnace duct system In upflow applications the return air can be brought in through the bottom or either side of the furnace If a furnace with bottom return air is installed on a p...

Page 12: ...hose from barbed fitting on the pressure switch assembly Remove pressure switch assembly 1 screw and cut wire tie to free pressure switch wires Reinstall pressure switch on the other side of orifice...

Page 13: ...instructions and the provided venting tables in these instructions The venting tables in this manual were extracted from the National Fuel Gas Code NFPA 54 ANSI Z223 1 and are provided as a guide for...

Page 14: ...accommodate a listed metal liner either the chimney must be rebuilt to accommodate one of these liners or an alternate approved venting method must be found Insulation for the flexible vent pipe must...

Page 15: ...ppliance vents The flow area of the largest section of vertical vent or chimney shall not exceed 7 times the smallest listed appliance categorized vent area drafthood outlet area or flue collar area u...

Page 16: ...ity listed in the common venting tables must be reduced by 10 the equivalent of one 90 elbow 0 90 x maximum common vent capacity 18 The common vent diameter must always be at least as large as the lar...

Page 17: ...15 136 20 226 22 339 5 22 65 30 130 39 219 49 330 10 29 59 40 121 51 206 64 315 15 35 53 48 112 61 195 76 301 20 0 0 97 0 202 0 349 0 540 2 10 75 14 149 18 250 20 377 5 21 71 29 143 38 242 47 367 10 2...

Page 18: ...220 15 1 21 50 33 89 47 142 64 220 2 22 53 35 96 49 153 66 235 3 24 55 36 102 51 163 68 248 20 1 21 54 33 99 46 157 62 246 2 22 57 34 105 48 167 64 259 3 23 60 35 110 50 176 66 271 30 1 20 62 31 113 4...

Page 19: ...nce connected to the common venting system is venting properly step 3 return all doors windows exhaust fans fireplace dampers and any other gas burning appliances to their previous mode of operation 7...

Page 20: ...20 930 360 10 19 250 7 08 200 5 66 170 4 81 151 4 28 138 3 91 125 3 54 118 3 34 110 3 11 103 2 92 1 25 4 1 049 26 645 680 19 25 465 13 17 375 10 62 320 9 06 285 8 07 260 7 36 240 6 80 220 6 23 205 5 8...

Page 21: ...res Electrostaticdischargecanaffectelectroniccomponents Take precautions during furnace installation and service to protect the furnace s electronic controls Precautions will help to avoid control exp...

Page 22: ...ontrol See for integrated control configuration This terminal is energized when the indoor blower is operating Any accessory rated up to one amp can be connected to this terminal with the neutral leg...

Page 23: ...507324 01 Page 23 of 32 Issue 1809 045 12 135 20 110 20 110 16 110 12 090 16 090 12 070 12 070 08 Figure 31 Wiring Diagram...

Page 24: ...Terminal Designations 120 HUM Humidifier 120 VAC LINE Input 120 VAC XFMR Transformer 120 VAC EAC Electronic Air Cleaner 120 VAC COOL Blower Cooling Speed 120 VAC HEAT Blower Heating Speed 120 VAC PARK...

Page 25: ...s If the switch will not turn or if the control switch will not move by hand do not try to repair it Placing the Furnace into Operation These units are equipped with an automatic ignition system Do no...

Page 26: ...gnitor warm up period the gas valve solenoid opens A 4 second trial for ignition period begins 5 Gas is ignited flame sensor proves the flame and the combustion process continues 6 If flame is not det...

Page 27: ...as an accurate reading has been obtained Take care to remove barbed fitting and replace threaded plug Proper Combustion Furnace should operate a minimum 15 minutes with correct manifold pressure and g...

Page 28: ...umper position across the five pins on the integrated control The unit is shipped with a factory fan off delay setting of 90 seconds The fan off delay affects comfort and is adjustable to satisfy indi...

Page 29: ...be drawn into living space resulting in personal injury or death WARNING Other Unit Adjustments Primary and Secondary Limits The primary limit is located on the heating compartment vestibule panel Th...

Page 30: ...ommended filter sizes Flue and Chimney 1 Check flue pipe chimney and all connections for tightness and to make sure there is no blockage 2 Check unit for proper draft Electrical 1 Check all wiring for...

Page 31: ...4 1022 935 817 Low 973 978 957 927 908 840 784 680 090B16 L 1 2 4 spd 10 x 10 30 60 High 1911 1840 1770 1663 1584 1469 1357 1198 Med High 1738 1707 1634 1560 1468 1364 1232 1121 Med 1533 1502 1462 140...

Page 32: ...height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than...

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