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268894-UIM-A-0407

Unitary Products Group

19

Multi-story or common venting systems are permitted and must be
installed in accordance with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 and / or the CSA B149.1, Natural Gas and Propane Installa-
tion Codes, local codes, and the manufacturer's instructions. 
Vent connectors serving Category I furnaces shall not be connected
into any portion of mechanical draft systems operating under positive
pressure.

Horizontal portions of the venting system shall be supported to prevent
sagging using hangers or perforated straps and must slope upwards
not less than 1/4" per foot (0.635 cm/m) from the furnace to the vent ter-
minal.
It is recommended that you follow the venting safety procedure below.
This procedure is designed to detect an inadequate ventilation system
that can cause the appliances in the area to operate improperly causing
unsafe levels of Carbon Monoxide or an unsafe condition to occur.

SECTION VIII: SAFETY CONTROLS

CONTROL CIRCUIT FUSE

A 3-amp fuse is provided on the control circuit board to protect the 24-
volt transformer from overload caused by control circuit wiring errors.
This is an ATO 3, automotive type fuse and is located on the control
board.

BLOWER DOOR SAFETY SWITCH

This unit is equipped with an electrical interlock switch mounted in the
blower compartment. This switch interrupts all power at the unit when
the panel covering the blower compartment is removed.

Electrical supply to this unit is dependent upon the panel that covers the
blower compartment being in place and properly positioned.

ROLLOUT SWITCH CONTROLS

These controls are mounted on the burner assembly. If the temperature
around the burners exceed the set point, the ignition control and the
gas valve are de-energized. The operation of this control indicates a
malfunction in the combustion air blower, heat exchanger or a blocked
vent pipe connection. Corrective action is required. These are manual
reset controls that must be reset before operation can continue.

PRESSURE SWITCHES

This furnace is supplied with a pressure switch which monitors the flow
through the combustion air/vent piping system. This switch de-ener-
gizes the ignition control module and the gas valve if any of the follow-
ing conditions are present. Refer to Figure 26 for tubing connections.

1.

Blockage of vent piping or terminal.

2.

Failure of combustion air blower motor.

LIMIT CONTROLS

There is a high temperature limit control located on the furnace vesti-
bule panel near the gas valve. This is an automatic reset control that
provides over temperature protection due to reduced airflow. This may
be caused by:

1.

Dirty filter.

2.

If the indoor fan motor should fail.

3.

Too many supply or return registers closed or blocked off.

The control module will lockout if the limit trips five (5) consecutive
times. Control will reset and try again after one 1 hour.

CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon
monoxide poisoning or death.
The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances
connected to the venting system are not in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the

CSA B149.1, Natural Gas and Propane Installation Code and these instructions. Determine that there is not blockage or restriction, leak-
age, corrosion and other deficiencies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the vent-

ing system are located and other spaces of the building.

4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bath-

room exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating contin-

uously.

7. Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the

flame of a match or candle.

8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel

Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Code.

9. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return

doors, windows, exhaust fans, fireplace dampers and any other gas-fired burning appliance to their previous conditions of use.

Main power to the unit must still be interrupted at the main power
disconnect switch before any service or repair work is to be done to
the unit. Do not rely upon the interlock switch as a main power dis-
connect.
Blower and burner must never be operated without the blower
panel in place.

 FIGURE 26:  

Pressure Switch Tubing Routing

Содержание GY8S*DH

Страница 1: ...OF SECTIONS SAFETY 1 DUCTWORK 4 FILTERS 8 GAS PIPING 8 ELECTRICAL POWER 9 TWINNING AND STAGING 12 VENT SYSTEM 14 SAFETY CONTROLS 19 START UP AND ADJUSTMENTS 20 WIRING DIAGRAM 27 LIST OF FIGURES Combus...

Страница 2: ...s from combustible materials as listed under Clearances to Combustibles in Table 1 Provide clearances for servicing ensuring that service access is allowed for both the burners and blower These models...

Страница 3: ...other cleaning tools 2 Soap powders bleaches waxes or other cleaning com pounds plastic items or containers gasoline kerosene ciga rette lighter fluid dry cleaning fluids or other volatile fluid 3 Pai...

Страница 4: ...connec tors are designed to be connected to the rectangular duct under the floor and sealed Refer to the instructions supplied with the duct con nector for proper installation Refer to the separate a...

Страница 5: ...in Residential and Modular Home duct designs IMPORTANT If the supply air duct is being connected to the furnace without the use of an accessory duct connector then a transition duct must be installed...

Страница 6: ...ld be sealed to prevent air leakage The sheet metal should be cross hatched to eliminate any popping of the sheet metal when the indoor fan is energized On all installations without a coil a removable...

Страница 7: ...T OF FURNACE 1 MAX BETWEEN ROD BACK OF FURNACE SUPPORT BRACKET FIGURE 4 Dimensions FRONT LEFT SIDE RIGHT SIDE FRONT FRONT BOTTOM IMAGE TOP IMAGE A B 40 3 4 20 31 1 8 5 3 4 2 1 2 28 1 2 1 1 8 7 3 8 A C...

Страница 8: ...d in the duct system using an external duct filter box attached to the furnace plenum Any branch duct rectan gular or round duct attached to the plenum must attach to the vertical plenum above the fil...

Страница 9: ...the body of the gas valve will damage the valve causing improper oper ation and or the valve to leak LoNOx furnaces requiring propane LP gas must have the LoNOx screens removed prior to installation...

Страница 10: ...field supplied thermostat by following the instructions that come with the thermostat With the thermostat set in the OFF position and the main electrical source disconnected connect the thermostat wi...

Страница 11: ...24 Volt Common Optional w Batteries BN11C01124 DP11C40124 PSC FURNACE CONTROL SINGLE STAGE AIR CONDITIONING BN11C00124 BP11C50124 PP11C70224 THERMOSTAT THERMOSTAT THERMOSTAT Single Stage A C w Single...

Страница 12: ...11 If furnace staging is desired with two single stage furnaces on a com mon duct where the gas burner on the first furnace operates on W1 and the gas burner on the second furnace operates on W2 then...

Страница 13: ...winning func tion of this board ensures that both blowers turn on and off simulta neously and operate on the same blower speed Even when only one furnace is supplying heat both furnace blowers must ru...

Страница 14: ...ceeding 45 degrees A vent system having not more than one 60 degree offset is permitted The vent system must be attached to the flue collar with a minimum of two 2 mechanical fasteners such as screws...

Страница 15: ...provided by the manufacturer of the power vent This unit may be horizontally vented using 4 10 2 cm diameter pipe with a minimum length of 4 5 feet 1 37 m and a maximum length of 34 5 feet 10 82 m wit...

Страница 16: ...pwards 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 four 4 ft 1 22 m FAN ASSISTED COMBUSTION...

Страница 17: ...4 An 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...

Страница 18: ...d Ambient Combustion Air GABLE VENT GAS VENT SOFFIT VENT VENTILATED ATTIC TOP ABOVE INSULATION OPTIONAL INLET a OUTLET AIR a VENTILATED CRAWL SPACE GAS WATER HEATER VENTILATED ATTIC TOP ABOVE INSULATI...

Страница 19: ...reset control that provides over temperature protection due to reduced airflow This may be caused by 1 Dirty filter 2 If the indoor fan motor should fail 3 Too many supply or return registers closed o...

Страница 20: ...gth 2 pieces of 1 8 0 3 cm tubing that are 4 10 0 cm in length a 1 8 0 3 cm tee and a 1 8 0 3 cm adapter to connect the U tube manometer or the digital pressure measur ing equipment to the gas valve p...

Страница 21: ...at the gas meter times a barometric pressure and temperature correction factor of 0 960 times 3600 then divided by the time it took to measure 0 10 m3 of gas from the gas meter For Propane LP Gas mul...

Страница 22: ...E The regulated outlet pressures both low and high have been calibrated at the factory Additional pressure adjustment should not be necessary If adjustment is necessary set to the following specifica...

Страница 23: ...are as follows LED will turn on for 1 4 second and off for 1 4 second This pattern will be repeated the number of times equal to the code For example six on flashes equals a number 6 fault code All fl...

Страница 24: ...ide heat for the house NOTE If a flame is detected the control flashes the LED for 1 8 of a second and then enters a flame stabilization period DIAGNOSTIC FAULT CODE STORAGE AND RETRIEVAL The control...

Страница 25: ...1493 1430 1373 1304 1199 1089 967 816 699 44 2 42 3 40 5 38 9 36 9 33 9 30 8 27 4 23 1 19 8 100 1200 B 29 3 34 0 B High 1710 1650 1580 1510 1420 1330 1260 1160 1090 930 48 4 46 7 44 7 42 8 40 2 37 7 3...

Страница 26: ...lowing example Example For a 60 000 BTUH 38 06 kW furnace operating on high speed blower it is found that total system static is 0 58 w c To deter mine the system airflow complete the following steps...

Страница 27: ...268894 UIM A 0407 Unitary Products Group 27 SECTION X WIRING DIAGRAM FIGURE 30 Wiring Diagram 268834...

Страница 28: ...o change without notice Printed in U S A 268894 UIM A 0407 Copyright by York International Corp 2007 All rights reserved Supersedes 167253 UIM C 0706 Unitary 5005 Norman Product York OK Group Drive 73...

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