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INSTALLATION MANUAL
RESIDENTIAL GAS FURNACE MODELS
YG8S*MP
Single Stage Multi-position for Operation
on 220 Volt 50 Hz Supply Power Only
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TWINNING AND STAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vertical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Coil Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Horizontal Right Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Horizontal Left Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PC Series Upflow Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Left or Right application (Right Shown) . . . . . . . . . . . . . . 6
Combustible Floor Base Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Suspended Furnace / Crawl Space Installation . . . . . . . . . . . 7
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Coil Projection Dimensions - PC Series Coils . . . . . . . . . . . . . . . . . . 6
Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Recommended Filter Sizes (High Velocity 600 FPM) . . . . . . . . . . . . 8
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ratings & Physical / Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . 11
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Unconfined Space Minimum Area . . . . . . . . . . . . . . . . . . . . . . . . . . 17
These high efficiency, compact units employ induced combustion, reli-
able hot surface ignition and high heat transfer aluminized tubular heat
exchangers. The units are factory shipped for installation in upflow or
horizontal applications and may be converted for downflow applica-
tions.
These furnaces are designed for residential installation in a basement,
closet, alcove, attic, recreation room or garage and are also ideal for
commercial applications. All units are factory assembled, wired and
tested to assure safe dependable and economical installation and oper-
ation.
These units are Category I listed and may be common vented with
another gas appliance as allowed by the ANSI Z223.1/NFPA54
National Fuel Gas Code.
SECTION I: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
LIST OF SECTIONS
VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF FIGURES
Single Stage PSC Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Single Stage PSC Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Typical Twinned Furnace Application . . . . . . . . . . . . . . . . . . . . . . . . 14
Single Stage Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . 15
Two-Stage Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . 15
Combustion Air Inducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Casing to the Burner Compartment . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . 17
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Blower Timing Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF TABLES
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Gas Rate (CU FT/HR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
(without filter) - Bottom Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
(without filter) - Left Side Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Failure to carefully
read and follow all instructions in this manual can result in furnace
malfunction, death, personal injury and/or property damage. Only a
qualified contractor, installer or service agency should install this
product.
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
435335-XIM-B-0210
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Summary of Contents for Johnson Controls YG8S MP Series
-
Page 1: Table Of Contents
INSTALLATION MANUAL RESIDENTIAL GAS FURNACE MODELS YG8S*MP EFFICIENCY RATING CERTIFIED Single Stage Multi-position for Operation ISO 9001 Certified Quality on 220 Volt 50 Hz Supply Power Only Management System LIST OF SECTIONS SAFETY ..........1 VENT SYSTEM . -
Page 2: Safety
11. The size of the unit should be based on an acceptable heat loss calculation for the structure. ACCA, Manual J or other approved methods may be used. Johnson Controls Unitary Products... - Page 3 These furnaces are not certified for installation in than 18 inches (46 cm) above the floor, and the furnace must be located mobile homes, trailers or recreational vehicles. or protected to avoid physical damage by vehicles. Johnson Controls Unitary Products...
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Page 4: Ductwork
FIGURE 1: Duct Attachment The minimum plenum height is 12” (30.5 cm). The furnace will not operate properly on a shorter plenum height. The minimum recom- mended rectangular duct height is 4 inches (10 cm) attached to the plenum. Johnson Controls Unitary Products... -
Page 5: Vertical Applications
A mounting plate, supplied with every coil should always be installed on the side desig- nated as top side. See Figures 4 & 5. Mounting Plate Furnace UPFLOW DOWNFLOW FIGURE 2: Vertical Applications FIGURE 5: Horizontal Left Application Johnson Controls Unitary Products... -
Page 6: Pc Series Upflow Coil Installation
Each coil is shipped with an external tie plate that should be used to secure the coil to the furnace. It should be installed on the back side of the coil using the dimpled pilot holes. See Figure 7. Johnson Controls Unitary Products... -
Page 7: Horizontal Application
When lifting the furnace, support the ends of the furnace rather than lifting by the cabinet flanges at the return air openings (bottom or sides) or supply air opening. Johnson Controls Unitary Products... -
Page 8: Filters
2. Do not exceed 1800 CFM using a single side return and a 16x25 filter. For CFM greater than 1800, you may use two side returns or one side and the bottom or one return with a transition to allow use of a 20x25 filter. Johnson Controls Unitary Products... -
Page 9: Gas Piping
Drip Leg Union Union External Ground Manual Union Shut-off Valve Pipe Valve Valve Drip Drip Drip Drip To Gas Gas Pipe Supply Ground Upflow Downflow Horizontal Union Drip Leg Configuration Configuration Configuration FIGURE 15: Gas Piping Johnson Controls Unitary Products... -
Page 10: Nominal Manifold Pressure
Do not attempt to drill out any orifices to obtain the proper orifice size. Drilling out a gas orifice will cause misalignment of the burner flames, causing premature heat exchanger burnout, high levels of carbon monoxide, excessive sooting, a fire hazard, personal injury, property damage and/or death. Johnson Controls Unitary Products... -
Page 11: Electrical Power
After making the wiring connections replace the wiring box cover and screws. Refer to Figure 16. The furnace's control system requires correct polarity of the power supply and a proper ground connection. Refer to Figure 16. Johnson Controls Unitary Products... -
Page 12: Thermostat Chart - Single Stage Ac With Single Stage Psc Furnaces
24VAC Humidifier (Optional) Humidistat Clipping Jumper W914 for electric heat on thermostat is not necessary Other Part Numbers: SAP = Legacy 265901 = 031-09166 FIGURE 17: Thermostat Chart - Single Stage AC with Single Stage PSC Furnaces Johnson Controls Unitary Products... -
Page 13: Thermostat Chart - Single Stage Hp With Single Stage Psc Furnaces
Menu must be set to Pump OFF Other Part Numbers: Part Numbers: Part Number: SAP = Legacy SAP = Legacy S1-2HU16700124 265901 = 031-09166 67297 = 031-01975 FIGURE 18: Thermostat Chart - Single Stage HP with Single Stage PSC Furnaces Johnson Controls Unitary Products... -
Page 14: Twinning And Staging
W2, will be supplying cold air in the Heating mode to the furnaces are isolated, thus preventing the possibility of any safety occupied spaces unless W2 is energized. devices being bypassed. Johnson Controls Unitary Products... -
Page 15: Vent System
Pressure this relay is required, as it ensures that the transformers of the two Switch furnaces are isolated, thus preventing the possibility of any safety Mounting Screw devices being bypassed. (Remove) FIGURE 22: Combustion Air Inducer Johnson Controls Unitary Products... -
Page 16: Estimated Free Area
Combustion air is brought into the furnace unless either the damper or the louver is in the fully open position. through the unit top panel opening. Johnson Controls Unitary Products... -
Page 17: Unconfined Space Minimum Area
Z223.1 (latest edition). This type installation requires two properly sized pipes. One brings combustion air from a properly ventilated attic space or crawl space and a second pipe that extends from the furnace vent connection (top right of unit) to the exterior of the building. Johnson Controls Unitary Products... -
Page 18: Start-Up And Adjustments
Be sure proper ventilation is available to dilute and carry away any vented gas. The furnace must be isolated from the gas supply piping system by closing the equipment shut-off valve during any pressure testing of the gas supply system. Johnson Controls Unitary Products... - Page 19 Repeat steps 2 - 5 until correct input is achieved. Be sure to relight any gas appliances that were turned off at the start of this input check. Johnson Controls Unitary Products...
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Page 20: Gas Rate (Cu Ft/Hr)
Size of Test Dial Seconds For Seconds For 1 Revolution 1 Revolution 1 Cu Ft 2 Cu Ft 5 Cu Ft 1 Cu Ft 2 Cu Ft 5 Cu Ft 1800 1636 1500 1385 1286 1200 1125 1059 1000 Johnson Controls Unitary Products... -
Page 21: Gas Valve
Refer to Figure 26 for connection details. in operation, check for gas leakage around the gas valve pressure port for leakage using an approved non-corrosive gas leak detec- tion fluid, or other non-flammable leak detection methods. Johnson Controls Unitary Products... -
Page 22: Reading Gas Pressure
Increase the blower speed to decrease the temperature rise; decrease the blower speed to increase the rise. TWIN PARK PARK Blower Off HI COOL Delay Timer (In seconds) HEAT EAC-H XFMR FIGURE 28: Furnace Control Board Johnson Controls Unitary Products... -
Page 23: Blower Performance Cfm - Any Position (Without Filter) - Bottom Return
1425 1427 1403 1335 1324 1280 1236 1176 1103 996 40.4 40.4 39.7 37.8 37.5 36.2 35.0 33.3 31.2 28.2 NOTES: 1. Airflow expressed in standard cubic feet per minute (CFM). 2. Motor voltage at 115 V. Johnson Controls Unitary Products... -
Page 24: Blower Performance Cfm - Any Position (Without Filter) - Left Side Return
1. Airflow expressed in standard cubic feet per minute (CFM). 2. Return air is through side opposite motor (left side). 3. Motor voltage at 115 V. 4. Airflow through across motor side (right side) may be slightly less than the data shown above. Johnson Controls Unitary Products... -
Page 25: Safety Controls
Never adjust pressure switch to allow furnace operation. When the room temperature falls below the setting of the room thermostat, the thermostat energizes the furnace control board. Johnson Controls Unitary Products... -
Page 26: Replacement Parts List
3. Customer Service contact information. a. Click on the “Brand Links” button b. Click on the “Customer Service” button • You can contact us by mail. Just send a written request to: Johnson Controls Unitary Products Consumer Relations 5005 York Drive Norman, OK 73069... -
Page 27: Wiring Diagram
435335-XIM-B-0210 SECTION XI: WIRING DIAGRAM FIGURE 29: Wiring Diagram Johnson Controls Unitary Products... - Page 28 NOTES Subject to change without notice. Published in U.S.A. 435335-XIM-B-0210 Copyright © 2010 by Johnson Controls, Inc. All rights reserved. Supersedes: 435335-XIM-A-0209 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...
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