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5052617-UIM-E-1116

Johnson Controls Unitary Products

21

SECTION VIII: COMBUSTION AIR AND 

VENT SYSTEM

COMBUSTION AIR AND VENT SAFETY

This Category IV, dual certified direct vent furnace is designed for resi-
dential application. It may be installed without modification to the con-
densate system in a basement, garage, equipment room, alcove, attic
or any other indoor location where all required clearance to combusti-
bles and other restrictions are met. The combustion air and the venting
system must be installed in accordance with Section 5.3, Air for Com-
bustion and Ventilation, of the National Fuel Gas Code Z223.1/NFPA 54
(latest edition), or Sections 7.2, 7.3 or 7.4 of CSA B149.1, National Gas
and Propane Codes (latest edition) or applicable provisions of the local
building code and these instructions.

COMBUSTION AIR/VENT PIPE SIZING

The size of pipe required will be determined by the furnace model, the
total length of pipe required and the number of elbows required.

Table 8 lists the maximum equivalent length of pipe allowed for each
model of furnace. The equivalent length of pipe for each elbow installed
is listed in Table 11. The equivalent length of the vent system is the total
length of straight pipe PLUS the equivalent length of all of the elbows.

The following rules must also be followed:

1.

Drain, waste, and vent (DWV) elbows with a long radius (sweep)
are recommended. Standard DWV elbows may be used, but since
they have a longer equivalent length, they will reduce the total
length of pipe that will be allowed. Short radius (plumbing or pres-
sure) elbows are not allowed for venting. The standard dimensions
of the acceptable elbows are shown in Figure 25 and Table 10.

2.

The maximum equivalent length listed in Table 8 is for the vent pip-
ing and the air intake piping separately. For example, if the table
allows 65 equivalent feet for a particular model, then the vent can
have 65 equivalent feet of pipe, AND the combustion air intake can
have another 65 equivalent feet of pipe. 

3.

Three vent terminal elbows (two for the vent and one for the com-
bustion air intake) are already accounted for and need not be
included in the equivalent length calculation.

4. All PVC or ABS combustion air and vent pipe must conform to

American National Standards Institute (ANSI) and American Soci-

ety for Testing and Materials (ASTM) standards D1785 (Schedule
40 PVC), D2665 (PVC-DWV), F891 (PVC-DWV Cellular Core),
D2261 (ABS-DWV) or F628 (Schedule 40 ABS). Pipe cement and
primer must conform to ASTM Standard D2546 (PVC) or D2235
(ABS). If ABS pipe is to be used, any joint where ABS pipe is joined
to PVC pipe must be glued with cement that is approved for use
with BOTH materials. Metallic materials must not be used for vent-
ing or air intake.

5.

If a flexible connector is used in the vent system, it must be made of
a material that is resistant to acidic exposure and to at least 225°F
(107.2°C) temperature. Flexible connectors are also allowed in the
combustion air pipe. 

6. All models are supplied with 2" (5.1 cm) vent connections. When

the pipe must be increased to 3" (7.6 cm) diameter, the transition
from 2" to 3" must be done as close to the furnace as possible. The
2” to 3” increase should be installed in the vertical position as to not
create an area that will pool water.

7.

In Canada, vents shall be certified to ULC S636, Standard for Type
BH Gas Venting Systems.

8.

In Canada, the first three feet (91.4 cm) of the vent must be readily
accessible for inspection.

9.

For single pipe systems it is recommended to install the combustion
air coupling provided and install approximately 18” of PVC pipe on
the furnace.

10. Minimum vent length for all models is 5 feet (1.5 m).

POLYPROPYLENE VENT/INTAKE PIPING

The ULC S636 approved polypropylene (PP) vent piping materials
listed below have been tested and approved for use with this furnace.
DO NOT mix parts made by different manufacturers. The entire vent/air
intake system must be made from pipe, fittings and termination made
by the same manufacturer. Only single-wall rigid polypropylene pipe is
approved for these furnaces. Use of flexible polypropylene pipe is not
allowed.

Selkirk Polyflue (Hart & Cooley) part numbers

Horizontal concentric termination - 2" - 2PF-HCT

Horizontal concentric termination - 3" - 3PF-HCT

Locking band - PF-LB

Consult the Polyflue installation instructions for assembly details.

For other Polyflue pipe and fitting part numbers, visit website 

www.polyflue.com

Duravent Polypro part numbers

Adapter to air intake coupling - 2PPS-ADL

Adapter connector - PPS-PAC

Twin pipe horizontal termination - 2" - 2PPS-HTPL

Twin pipe horizontal termination - 3" - 3PPS-HTPL

Consult the Polypro installation instructions for assembly details.

For other Polypro pipe and fitting part numbers, visit website

www.duravent.com

Centrotherm Innoflue

Adapter to air intake coupling - ISAGL0202

Adapter to draft inducer blower - ISAAL0202

Low profile wall termination - 2" - ISLPT0202

Low profile wall termination - 3" - ISLPT0303

Consult the Innoflue installation instructions for assembly details.

For other Innoflue pipe and fitting part numbers, visit website 

www.centrotherm.us.com

IMPORTANT

The VENT SYSTEM must be installed as specified in these instruc-
tions for Residential and non-HUD Modular Homes. The direct vent
system is the only configuration that can be installed in a non-HUD
Modular Home.

 WARNING

 This furnace may not be common vented with any other appliance,
since it requires separate, properly sized air intake and vent lines.
The furnace shall not be connected to any type of B, BW or L vent or
vent connector, and not connected to any portion of a factory-built or
masonry chimney
The furnace shall not be connected to a chimney flue serving a sepa-
rate appliance designed to burn solid fuel.

 CAUTION

When combustion air pipe is installed above a suspended ceiling or
when it passes through a warm and humid space, the pipe may need
insulated if two feet or more of pipe is exposed.
Vent piping must be insulated if it will be subjected to freezing tem-
peratures such as routing through unheated areas or through an
unused chimney.

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Summary of Contents for TM9Y Series

Page 1: ...tion 26 Downward Venting 26 Direct Vent Air Intake Connection and Vent Connection 26 Combustion Airflow Path Through The Furnace Casing 27 Ambient Combustion Air 28 Attic and Crawl Space Combustion Air Termination 29 Gas Valve 32 Reading Gas Pressure 32 Measuring External Duct Static 33 Furnace Control Board 33 Wiring Diagram 38 LIST OF TABLES Unit Clearances to Combustibles 4 Coil Projection Dime...

Page 2: ...urnaces manufactured on or after May 1 2017 are NOT per mitted to be used in Canada for heating of buildings or structures under construction 10 When installed in a non HUD Approved Modular Home or building constructed on site combustion air shall not be supplied from occu pied spaces 11 The size of the unit should be based on an acceptable heat loss calculation for the structure ACCA Manual J or ...

Page 3: ... jurisdiction In the United States and Canada follow all codes and standards for the following using the latest edition available STEP 1 Safety US National Fuel Gas Code NFGC NFPA 54 ANSI Z223 1 and the Installation Standards Warm Air Heating and Air Conditioning Systems ANSI NFPA 90B CANADA CAN CGA B149 1 National Standard of Canada Natu ral Gas and Propane Installation Codes NSCNGPIC STEP 2 Gene...

Page 4: ... every dwelling building or structure used in whole or in part for resi dential purposes including those owned or operated by the Com monwealth and where the side wall exhaust vent termination is less than seven 7 feet above finished grade in the area of the venting including but not limited to decks and porches the following require ments shall be satisfied 1 INSTALLATION OF CARBON MONOXIDE DETEC...

Page 5: ...er This access cover shall be attached in such a manner as to prevent leaks DUCT FLANGES Four flanges are provided to attach ductwork to the furnace These flanges are rotated down for shipment In order to use the flanges remove the screw holding an individual flange rotate the flange so it is in the upward position and reinstall the screw Repeat this for all 4 flanges If the flanges are not used t...

Page 6: ...nd applications no conversion is required to an MC coil when used with a downflow horizontal furnace A mounting plate supplied with every coil should always be installed on the side designated as top side See Figures 4 and 5 FURNACE ASSEMBLY PC SERIES COILS These upflow coils are designed for installation on top of upflow fur naces only If the coil is used with a furnace of a different size use a ...

Page 7: ...herwise raised off the floor it will be necessary to seal the edges of the bottom panel to the casing using tape or other appropriate gasket material to prevent air leakage BOTTOM RETURN AND ATTIC INSTALLATIONS Bottom return applications normally pull return air through a base plat form or return air plenum Be sure the return platform structure or return air plenum is suitable to support the weigh...

Page 8: ...the center of the furnace near the blower shelf and the third support should be at the return end of the fur nace Maintain a 6 15 2 cm minimum clearance between the front of the furnace and the support rods or straps All six suspension points must be level to ensure proper and quiet fur nace operation When suspending the furnace use a secure platform constructed of plywood or other building materi...

Page 9: ...Optional Return Air Cutout Either side 29 5 For Cladded door add appoximately an additional 75 C SUPPLY END 56 56 20 B 3 23 8 56 Combustion Air Inlet Vent Outlet RETURN END B 24 25 Table 3 Cabinet and Duct Dimensions BTUH kW Input Nominal CFM m3 min Cabinet Size Cabinet Dimensions Approximate Operating Weights A in A cm B in B cm C in C cm Lbs kg 40 11 7 1000 28 3 A 14 1 2 36 8 13 3 8 34 0 11 3 4 ...

Page 10: ...type of gas approved for this furnace Only use those approved gases The instal lation of a drip leg and ground union is required Refer to Figure 16 FIGURE 14 Side Return Cutout Markings IMPORTANT Some accessories such as electronic air cleaners and pleated media may require a larger side opening Follow the instructions supplied with that accessory for side opening requirements Do not cut the openi...

Page 11: ...2437 2438 2742 2743 3048 in w c in w c in w c kPa kPa kPa 800 3 5 3 5 3 5 29 8 0 9 0 9 0 9 850 3 5 3 5 3 5 31 7 0 9 0 9 0 9 900 3 5 3 5 3 5 33 5 0 9 0 9 0 9 950 3 5 3 5 3 3 35 4 0 9 0 9 0 8 1000 3 5 3 2 2 9 37 3 0 9 0 8 0 7 1050 3 5 2 9 2 7 39 1 0 9 0 7 0 7 1100 3 2 2 7 2 4 41 0 0 8 0 7 0 6 2500 LP 9 8 8 2 7 5 93 2 LP 2 4 2 0 1 9 TABLE 6 Nominal Manifold Pressure Low Fire First Stage Manifold Pres...

Page 12: ... the thermo stat to the terminal board on the ignition module as shown in Figures 18 or 19 Electronic thermostats require the common wire to be con nected Do not use power stealing thermostats Apply strain relief to thermostat wires passing through cabinet If air conditioning equipment is installed use thermostat wiring to connect the Y and C terminals on the furnace control board to the proper wi...

Page 13: ...urnace control board FIGURE 18 Thermostat Chart Two Stage AC with Two Stage Standard ECM Furnaces 9ROW RPPRQ 5 9ROW RW LUVW 6WDJH RPSUHVVRU 6HFRQG 6WDJH RPSUHVVRU DQ 7 50267 7 LUVW 6WDJH HDW 6HFRQG 6WDJH 9ROW RPPRQ 5 9ROW RW LUVW 6WDJH HDW 6HFRQG 6WDJH HDW 6HFRQG RU XOO 6WDJH RPSUHVVRU 7 2 67 36 851 DQ 6LQJOH 6WDJH RPSUHVVRU 7 2 67 5 21 7 21 5 9ROW RPPRQ 5 9ROW RW LUVW 6WDJH RPSUHVVRU WHUQDO XPLGL...

Page 14: ...e heat pump control to ON if Hot Heat Pump Operation is desired Bonnet Sensor Optional C 24 Volt Common R 24 Volt Hot Y1 First Stage Compressor O Reversing Valve Energized in Cool L Malfunction Light Y2 Second Stage Compressor G Fan THERMOSTAT E W1 First Stage Aux Heat W2 Second Stage Aux Heat L Terminal not on all Thermostats C 24 Volt Common R 24 Volt Hot W W1 First Stage Heat W2 Second Stage He...

Page 15: ...de opening when viewed from the front of the furnace Condensate drain line may be routed to either side of the furnace in upflow or downflow configurations The condensate hoses must slope downwards at all points When drain hose routing changes are required shown in Figures 21 24 be sure to cap all un used openings If rerouting hoses excess length should be cut off so that no sagging loops will col...

Page 16: ... intake coupling the drain opening in the vent drain must not be plugged If the intake drain is used the bird screen cannot be installed This is only approved for upflow and horizontal applications when the intake pipe is located on the top of the furnace This is true for all long horizontal venting in any furnace configuration This will keep condensate from entering the furnace WARNING DO NOT ter...

Page 17: ...f so that no sagging loops will collect and hold condensate which will cause the furnace to not operate Shorten pressure switch hose Re route and shorten pressure switch hose Shorten rain gutter hose Move rain gutter hose to this position For 100 120K input furnaces the condensate drain is plumbed toward the left casing outlet from the factory For 040 060 080K input furnaces the condensate drain i...

Page 18: ...itch hose to this position NOTE May require the longer hose that is provided with wider cabinets Move condensate drain hose to this position may exit either side of the cabinet Move rain gutter hose to this position When drain hose routing changes are required be sure to cap all un used openings If rerouting hoses excess length should be cut off so that no sagging loops will collect and hold conde...

Page 19: ...hose to this position NOTE May require the longer hose that is provided with wider cabinets Change condensate drain connection to the 90 fitting provided Move condensate drain hose to this position Move rain gutter hose to this position NOTE May require hose extension that is provided with wider cabinets Move condensate drain hose to this position Change condensate drain connection to the 90 fitti...

Page 20: ...LQJ SURYLGHG 0RYH FRQGHQVDWH GUDLQ KRVH WR WKLV SRVLWLRQ 0RYH UDLQ JXWWHU KRVH WR WKLV SRVLWLRQ KDQJH FRQGHQVDWH GUDLQ FRQQHFWLRQ WR WKH ILWWLQJ SURYLGHG 0RYH FRQGHQVDWH GUDLQ KRVH WR WKLV SRVLWLRQ 5 2 0RYH SUHVVXUH VZLWFK KRVH WR WKLV SRVLWLRQ KHQ GUDLQ KRVH URXWLQJ FKDQJHV DUH UHTXLUHG EH VXUH WR FDS DOO XQ XVHG RSHQLQJV I UHURXWLQJ KRVHV H FHVV OHQJWK VKRXOG EH FXW RII VR WKDW QR VDJJLQJ ORRSV ...

Page 21: ...llowed in the combustion air pipe 6 All models are supplied with 2 5 1 cm vent connections When the pipe must be increased to 3 7 6 cm diameter the transition from 2 to 3 must be done as close to the furnace as possible The 2 to 3 increase should be installed in the vertical position as to not create an area that will pool water 7 In Canada vents shall be certified to ULC S636 Standard for Type BH...

Page 22: ...45 80 000 4 125 100 000 2 20 100 000 2 NA 100 000 3 80 100 000 3 60 100 000 4 145 100 000 4 125 120 000 3 80 120 000 3 60 120 000 4 145 120 000 4 125 Elevation 4001 5000 Elevation 8001 9000 Model Input BTUH Pipe Size in Max equivalent Length ft Model Input BTUH Pipe Size in Max equivalent Length ft 40 000 2 50 40 000 2 30 40 000 3 75 40 000 3 55 40 000 4 140 40 000 4 120 60 000 2 50 60 000 2 30 60...

Page 23: ...installations above 5000 Feet Part Number Models S1 1PS3308 All FIGURE 25 Dimensions TABLE 10 Elbow Dimensions Elbow A Dimension 2 Standard 2 5 16 3 Standard 3 1 16 2 Sweep 3 1 4 3 Sweep 4 1 16 TABLE 11 Equivalent Length of Fittings Fitting Equivalent Length 2 90 sweep elbow 5 feet of 2 pipe 2 45 sweep elbow 2 1 2 feet of 2 pipe 2 90 standard elbow 7 feet of 2 pipe 2 45 standard elbow 3 1 2 feet o...

Page 24: ...rements of the gas supplier 12 30 5 cm or in accordance with local installation codes and the requirements of the gas supplier F Clearance to outside corner 12 30 5 cm or in accordance with local installation codes and the requirements of the gas supplier 12 30 5 cm or in accordance with local installation codes and the requirements of the gas supplier G Clearance to inside corner 3 feet 91 4 cm 3...

Page 25: ...e 27 Each furnace must have a separate vent pipe Under NO circumstances can the two vent pipes be tied together The combustion air side of the two pipe configuration shown in Figure 29 can be installed so the combustion air pipe terminates as described in outdoor combustion air or ventilated combustion air sections in these instructions Follow the instructions for outdoor combustion air or venti l...

Page 26: ...ons Refer to Ambient Combustion air Supply for proper installa tion Refer to Figures 33 and 34 3 VENTILATED COMBUSTION AIR Combustion air is supplied through a PVC or ABS pipe that is connected to the PVC coupling attached to the burner box and is terminated in a ventilated attic or crawl space The combustion air and the vent pipes are not termi nated in the same atmospheric zone Refer to Figure 3...

Page 27: ...ted damper or manually adjustable louvers are not permitted for use 4 A automatically operated damper or automatically adjustable lou vers shall be interlocked so that the main burner cannot operate unless either the damper or the louver is in the fully open position FIGURE 34 Combustion Airflow Path Through The Furnace Casing WARNING This type of installation requires that the supply air to the a...

Page 28: ...6 45 cm3 per 0 879 kW of the total input rating of all equipment located in the enclosure b Not less than the sum of all vent connectors in the confined space 3 The duct shall be least the same cross sectional area as the free area of the air supply inlet opening to which it connects 4 The blocking effects of louvers grilles and screens must be given consideration in calculating free area If the f...

Page 29: ...instructions Place the appliance being inspected in operation Adjust thermostat so the appliance shall operate continu ously 5 Test each appliance such as a water heater equipped with a draft hood for spillage down draft or no draft at the draft hood relief opening after 5 minutes of main burner operation Appliances that do not have draft hoods need to be checked at the vent pipe as close to the a...

Page 30: ... Burner orifices are sized to provide proper input rate using natural gas with a heating value of 1030 BTU Ft3 38 4 MJ m3 If the heating value of your gas is significantly different it may be necessary to replace the orifices Verify natural gas input rate by clocking meter 1 Turn off all other gas appliances and pilots 2 Run furnace for a minimum of 3 minutes in heating operation 3 Measure time in...

Page 31: ...Ft 2 Cu Ft 5 Cu Ft 1 Cu Ft 2 Cu Ft 5 Cu Ft 10 360 720 1800 55 65 131 327 11 327 655 1636 56 64 129 321 12 300 600 1500 57 63 126 316 13 277 555 1385 58 62 124 310 14 257 514 1286 59 61 122 305 15 240 480 1200 60 60 120 300 16 225 450 1125 62 58 116 290 17 212 424 1059 64 56 112 281 18 200 400 1000 66 54 109 273 19 189 379 947 68 53 106 265 20 180 360 900 70 51 103 257 21 171 343 857 72 50 100 250 ...

Page 32: ...n flammable leak detection methods ADJUSTMENT OF TEMPERATURE RISE IMPORTANT The inlet gas pressure operating range table specifies what the mini mum and maximum gas line pressures must be for the furnace to operate safely The gas line pressure MUST BE a minimum of 7 w c 1 74 kPA for Natural Gas 11 w c 2 74 kPA for Propane LP Gas in order to obtain the BTU input specified on the rating plate and or...

Page 33: ...wer speeds on 24V thermostat inputs Y1 Y Y2 W W2 TAKING A FLUE GAS SAMPLE If it becomes necessary to obtain a flue gas sample for analysis it is permissible to drill a small hole in the plastic flue pipe for a sample probe provided that the vent piping is PVC and the hole is properly sealed afterwards If using a polypropylene vent system the vent sys tems manufacturer test port fitting must be use...

Page 34: ...170 1140 1110 1070 1040 990 930 820 730 650 Medium 990 980 940 900 860 830 790 730 680 630 Medium Low 900 880 850 810 770 730 670 630 600 560 Low 730 710 690 650 620 590 540 510 480 450 60B High 1402 1374 1354 1328 1299 1262 1222 1167 1107 1036 Medium High 1252 1233 1203 1182 1150 1125 1095 1064 1031 980 Medium 1076 1059 1029 1007 973 946 908 883 843 800 Medium Low 988 967 936 903 875 838 806 765 ...

Page 35: ...ensed within 1 0 seconds The gas valve will de energize and the control will begin a recycle operation A normal ignition sequence will begin after a 15 sec ond inter purge If during the five recycles the gas supply does not return or the fault condition is not corrected the ignition control will lock out for 60 minutes During burner operation a momentary loss of power for 50 milliseconds or longer...

Page 36: ...es This condition is usually caused by a failed blower motor or blower wheel The control will enter a hard lockout and power will have to be cycled off and on to reset the control after the problem has been corrected 13 RED FLASHES This fault code indicates that the 2nd stage high pressure switch is open with a call for 2nd stage heating high fire pres ent Check for faulty inducer blocked vent pip...

Page 37: ... FOAM Door 1 5 ft req d GROMMET 3 req d HARNESS WIRING HOSE CONDENSATE HOSE RAIN GUTTER KNOB QUARTER TURN 4 req d MOTOR MOUNT ORIFICE BURNER Natural 45 PAN CONDENSATE PLUG SEAL 7 8 PLUG SEAL 2 3 8 PLUG VENT PIPE SIGHT GLASS OVAL 2 req d TUBING SILICON DESCRIPTION REPLACEMENT PART CONTACT INFORMATION This is a generic parts list To request a complete parts list refer to the contact information belo...

Page 38: ...5052617 UIM E 1116 38 Johnson Controls Unitary Products SECTION XIII WIRING DIAGRAM FIGURE 41 Wiring Diagram ...

Page 39: ...oper furnace start up is critical to customer comfort and equipment longevity Owner Information Equipment Data Furnace Configuration Filter Thermostat Accessories Connections All Per Installation Instructions and Local Code Staging Condensate Management Venting Electrical Line Voltage Electrical Low Voltage Exhaust Termination Intake Termination ...

Page 40: ...hnson Controls Inc All rights reserved Supersedes 5052617 UIM D 1016 York International Corp 5005 York Drive Norman OK 73069 Gas Side Air Side System External Static Pressure Owner Education Air Side Heating STD ECM Air Side Cooling STD ECM Air Side Continuous Fan STD ECM Clean Up Cycle Test ...

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