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166753-UIM-C-0706

16

Unitary Products Group

A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

‡ 

Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. For clearance not specified in ANSI Z223.1 / NFPA 54 or CSA B149.1-00.

Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer’s Installation Manual.
Any fresh air or make up inlet for dryer or furnace area is considered to be forced air inlet. 
Avoid areas where condensate drippage may cause problems such as above planters, patios, or adjacent to windows where steam may cause fogging. 
A terminus of a vent shall be either: 

Fitted with a cap in accordance with the vent manufacturer’s installation instructions, or In accordance with the installation instructions for a special venting system.

* Does not apply to multiple installations of this furnace model. Refer to "VENTING MULTIPLE UNITS" in this section of these instructions.
IMPORTANT: Consideration must be given for degradation of building materials by flue gases. Sidewall termination may require sealing or shielding of building surfaces with a corrosion resistant 

material to protect against combustion product corrosion. Consideration must be given to wind direction in order to prevent flue products and/or condensate from being blown against 
the building surfaces. If a metal shield is used it must be a stainless steel material at a minimum dimension of 20 inches. It is recommended that a retaining type collar be used that is 
attached to the building surface to prevent movement of the vent pipe.

Responsibility for the provision of proper adequate venting and air supply for application shall rest with the installer.
Vent shall extend high enough above building, or a neighboring obstruction, so that wind from any direction will not create a positive pressure in the vicinity of the vent.

HORIZONTAL VENT APPLICATIONS AND 

HORIZONTAL VENT APPLICATIONS AND 

HORIZONTAL VENT APPLICATIONS AND 

HORIZONTAL VENT APPLICATIONS AND 
TERMINATION

TERMINATION

TERMINATION

TERMINATION

When selecting the location for a horizontal combustion air / vent termi-
nation, the following should be considered:

1.

Observe all clearances  listed  in vent  clearances  in  these instruc-
tions.

2.

Termination should be positioned where vent vapors will not dam-
age plants or shrubs or air conditioning equipment.

3.

Termination should be located where it will not be affected by wind
gusts,  light  snow,  airborne  leaves  or  allow  recirculation  of  flue
gases.

4.

Termination  should  be  located  where  it  will  not  be  damaged  or
exposed to flying stones, balls, etc.

5.

Termination should be positioned where vent vapors are not objec-
tionable.

6.

Horizontal portions of the vent system must slope upwards and be
supported to prevent sagging. The vent system may be supported
by  the  use of  clamps or hangers  secured to  a permanent  part of
the structure every 4 ft. (1.22 m).

FAN-ASSISTED COMBUSTION SYSTEM

FAN-ASSISTED COMBUSTION SYSTEM

FAN-ASSISTED COMBUSTION SYSTEM

FAN-ASSISTED COMBUSTION SYSTEM

An  appliance  equipped  with  an  integral  mechanical  means  to  either
draw or force products of combustion through the combustion chamber
and/or heat exchanger.

Ambient Combustion Air Supply

This  type  installation  will  draw  the  air  required  for  combustion  from
within  the  space  surrounding  the  appliance  and  from  areas  or  rooms
adjacent  to  the  space  surrounding  the  appliance.  This  may  be  from
within the space in a non-confined location or it may be brought into the
furnace  area  from  outdoors  through  permanent  openings  or  ducts.  A
single, properly sized pipe from the furnace vent connector to the out-
doors must  be  provided. For  upflow models combustion  air is  brought
into the furnace through the unit top panel opening.

 FIGURE 19:  

Home Layout

L

E

D

B

V

V

V

X

V

B

V

J

X

B

B

B

V

V

F

V

C

B

X

V

I

V

G

H

A

M

K

OPERABLE

FIXED

CLOSED

VENT TERMINAL

AIR SUPPLY

AREA WHERE TERMINAL IS NOT PERMITTED

FIXED

CLOSED

Canadian Installations

1

US Installation

2

A. Clearance above grade, veranda, porch, deck, or balcony

12 inches (30 cm)

12 inches (30 cm)

B. Clearance to window or door that may be opened

12 inches (30 cm) for models <100,000 BTUH (30 kW), 
36 inches (91 cm) for models > 100,000 BTUH (30 kW)

4 Feet

C. Clearance to permanently closed window

4 Feet

4 Feet

D. Vertical clearance to ventilated soffit located 

above the terminal within a horizontal distance 
of 2 feet (61 cm) from the center line of the terminal

4 Feet

4 Feet

E. Clearance to unventilated soffit

12 Inches

12 Inches

F. Clearance to outside corner 

12 Inches

12 Inches

G. Clearance to inside corner

6 Feet

6 Feet

H. Clearance to each side of center line extended 

above meter/regulator assembly

3 feet (91 cm) within a height 15 feet (4.5 m) above the 
meter/regulator assembly

3 feet (91 cm) within a height 15 feet (4.5 m) above the 
meter/regulator assembly

I. Clearance to service regulator vent outlet

3 feet (91 cm)

3 feet (91 cm)

J. Clearance to nonmechanical air supply inlet to building 

or the combustion air inlet to any other appliance

12 inches (30 cm) for models <100,000 BTUH (30 kW), 
35 inches (91 cm) for models >100,000 BTUH (30 kW)

4 Feet

K. Clearance to a mechanical supply inlet

6 feet (1.83 m)

3 feet (91 cm) above if within 10 feet (3 cm) horizontally

L. Clearance above paved sidewalk or paved driveway located on public property 7 feet (2.13 m) 

7 feet (2.13 m) 

M.Clearance under veranda, porch, deck, or balcony

12 inches (30.4 cm)

12 inches (30.4 cm)

Vent Termination from any Building Surface

12" (30.4 cm)

12" (30.4 cm)

Above anticipated snow depth

12" (30.4 cm)

12" (30.4 cm)

1.

In accordance with the current CSA B149.1-00, Natural Gas and Propane Installation Code.

2.

In accordance with the current ANSI Z223.1 / NFPA 54, National Gas Code.

Summary of Contents for GM8S*UH

Page 1: ...IPING 8 ELECTRICAL POWER 9 TWINNING AND STAGING 12 VENT SYSTEM 14 SAFETY CONTROLS 19 START UP AND ADJUSTMENTS 20 WIRING DIAGRAM SAFETY 1 LIST OF FIGURES Dimensions 5 Typical Attic Installation 6 Typic...

Page 2: ...to be sure that the elec trical characteristics match All models use nominal 115 VAC 1 Phase 60 Hertz power supply DO NOT CONNECT THIS APPLI ANCE TO A 50 HZ POWER SUPPLY OR A VOLTAGE ABOVE 130 VOLTS...

Page 3: ...earances shall take precedence over clear ances for combustible materials where accessibility clearances are greater Installation in a residential garage A gas fired furnace for installation in a resi...

Page 4: ...y subtracting the Return Air Temperature Reading from the Supply Air Temperature Read ing 2 The External Static Pressure is determined by adding the Supply Duct Static Pressure reading to the Return D...

Page 5: ...as orifice and or a faulty limit switch can cause the furnace to operate above the maximum supply air temperature Refer to sections II III and IX for additional informa tion on correcting the problem...

Page 6: ...with the air conditioning coil for additional information Horizontal Installations Without a Cooling Coil Cabinet When installing this appliance the furnace must be installed so as to create a closed...

Page 7: ...lter rack following the instructions provided with that accessory If a filter s is provided at another location in the return air system the ductwork may be directly attached to the furnace side panel...

Page 8: ...factory for natural gas fired operation at 0 8 000 feet 0 m 2 438 m above sea level The manifold pressure must be changed in order to manitain proper and safe operation when the furnace is installed...

Page 9: ...y using factory specified and or approved parts must perform the conversion The installer must take every precaution to insure that the furnace has been converted to the proper gas orifice size when t...

Page 10: ...cut wire tie holding excess wiring Reposition on the left side of the furnace and fas ten using holes provided LOW VOLTAGE CONTROL WIRING CONNECTIONS LOW VOLTAGE CONTROL WIRING CONNECTIONS LOW VOLTAG...

Page 11: ...mon C 24 Volt Common Optional w Batteries BN11C01124 DP11C40124 PSC FURNACE CONTROL SINGLE STAGE AIR CONDITIONING BN11C00124 BP11C50124 PP11C70224 THERMOSTAT THERMOSTAT THERMOSTAT HP1 W 031 01975 Seri...

Page 12: ...s Separate plenums and supply ducts systems cannot be utilized A sin gle return air plenum common to both furnaces must be used It is sug gested that a return platform be utilized with bottom air entr...

Page 13: ...single two stage furnace This allows only one furnace to supply heat during times when the heat output from one furnace is sufficient to satisfy the demand When one duct system is used for two furnac...

Page 14: ...es the maximum allowable vent pipe length the furnace must be converted for high altitude operation Refer to SECTION IV GAS PIP ING of these instructions and the proper high altitude application instr...

Page 15: ...to the proper length beginning at the furnace 2 Deburr the piping inside and outside 3 Dry fit the vent piping assembly from the furnace to the termination checking for proper fit support and slope Pi...

Page 16: ...ionable 6 Horizontal portions of the vent system must slope upwards and be supported to prevent sagging The vent system may be supported by the use of clamps or hangers secured to a permanent part of...

Page 17: ...d 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...

Page 18: ...izontally from the burner level of the appliance Refer to AIR SOURCE FROM OUTDOORS AND VENT AND SUPPLY AIR SAFETY CHECK in these instructions for additional information and safety check procedure 2 Th...

Page 19: ...tion Corrective action is required These are manual reset controls that must be reset before operation can continue PRESSURE SWITCHES PRESSURE SWITCHES PRESSURE SWITCHES PRESSURE SWITCHES This furnace...

Page 20: ...g 1 5 16 0 8 cm tee 1 5 16 0 8 cm x 1 8 3 175 mm reducing coupling 1 1 8 0 3 cm adapter There is a accessory kit 1PK0602 available from Source 1 which has the following items 12 30 cm length x 1 8 0 3...

Page 21: ...er times a barometric pressure and temperature correction factor of 0 960 times 3600 then divided by the time it took to measure 2 cubic ft 0 0566 m3 of gas from the gas meter For Propane LP Gas multi...

Page 22: ...ure 30 for connection details IMPORTANT The cap for the pressure regulator must be removed entirely to gain access to the adjustment screw Loosening or tightening the cap does not adjust the flow of g...

Page 23: ...sure regulator adjustment cap and adjustment screws on main gas valve 7 After the manifold pressure has been adjusted re calculate the furnace input to make sure you have not exceeded the specified in...

Page 24: ...ter pressure drop values in Table 15 are typical values for the type of filter listed and should only be used as a guideline Actual pres sure drop ratings for each filter type vary between filter manu...

Page 25: ...is 0 58 w c To determine the system airflow complete the following steps Obtain the airflow values at 0 50 w c 125 Pa 0 60 w c 150 Pa ESP Airflow 0 50 1250 CFM 35 4 m3 min Airflow 0 60 1180 CFM 33 4...

Page 26: ...35 7 Medium Low 1720 1700 1670 1620 1570 1500 1430 1310 1160 1000 48 7 48 1 47 3 45 9 44 5 42 5 40 5 37 1 32 8 28 3 Low 1410 1390 1360 1330 1280 1220 1170 1060 930 840 39 9 39 4 38 5 37 7 36 2 34 5 33...

Page 27: ...030 1980 1910 1850 1710 1570 1300 59 7 59 7 58 6 57 5 56 1 54 1 52 4 48 4 44 5 36 8 Medium Low 1690 1690 1650 1610 1540 1480 1410 1280 1170 1030 47 9 47 9 46 7 45 6 43 6 41 9 39 9 36 2 33 1 29 2 Low 1...

Page 28: ...opyright by York International Corp 2006 All rights reserved Supersedes 166753 UIM B 0306 Unitary 5005 Norman Product York OK Group Drive 73069 SECTION X WIRING DIAGRAM SECTION X WIRING DIAGRAM SECTIO...

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