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Page 22 

                 

Installer’s Guide

  Does the unit run and operate as described in the section on 

Sequence of Operation in response to the room thermostat?

 Are the condenser fan and indoor blower operating correctly  

  with proper rotation and without undue noise?

 Is the compressor operating correctly and has the system been  

  checked with a charging chart?

 Has the voltage and running current been checked to deter 

  mine if it is within limits?

 Has the thermostat been checked for calibration and the air    

discharge grilles adjusted to balance the system?

 Has the ductwork been checked for air leaks and 

 condensation?

 Has the furnace manifold pressure been checked and 

  adjusted if necessary?

 Has the heating air temperature rise been checked?

 Has the unit been checked for tubing and sheet metal rattles?   

  Are there any other unusual noises to be checked?

 Are all covers and panels in place and properly fastened?

 Has the owner been instructed on the proper operation and 

  maintenance of the unit? Be sure to leave this manual with the  
 owner.

Final Installation Checklist

Starting the Unit in the Cooling Mode

To start the unit in the cooling mode, set the thermostat system switch 
to COOL and move the thermostat COOL indicator to a setting below 
room temperature.  The condenser (outdoor) fan motor compressor 
and evaporator (indoor) fan motor will operate automatically.

NOTE:  See the section on “Sequence of Operation” for a de-
scription of the cooling operating sequence.

Operating Pressures

After the unit has operated in the cooling mode for a short period of 
time, install pressure gauges on the gauge ports of the discharge 
and suction line valves.  Check the suction and discharge pressures 
and compare them to the normal operating pressures provided in 
the unit’s 

SERVICE FACTS.

NOTE:  Do not use the pressures from the unit's SERVICE FACTS 
to determine the unit refrigerant charge.  The correct charge is 
shown on the unit nameplate.  To charge the system accurately, 
weigh in the charge according to the unit nameplate.

Voltage

With the compressor operating, check the line voltage at the unit.  
The voltage should be within the range shown on the unit name-
plate.  If low voltage is encountered, check the size and length of 
the supply line from the main disconnect to the unit.  The line may 
be undersized for the length of the run.

Cooling Shut Down

Set the system mode to OFF or adjust the cooling setpoint to above 
room temperature.

Heating Cycle

These units are equipped with a solid-state ignition control that lights 
the burners each time the thermostat calls for heat.  The burners 
are extinguished during the OFF cycle.

The gas heating section of the unit can be started using the follow-
ing procedure:

  1. Be sure the thermostat is at its lowest setting and the power to 

the unit is off.

 

a. Turn the main shutoff valve on the gas supply line ON.

 

b.  Turn or switch the manual valve on the combination gas valve 

ON position.

  2. Be sure the burner compartment access panel is in place.
 

a. Turn on the electrical power to the unit.

 

b.  Turn the thermostat to the highest setting in the heating cycle. 

 

  3. As the thermostat calls for heat, the system cycles as follows:
 

a. The combustion blower is energized.

 

b. The pressure switch is closed.

 

c.  The gas valve opens and the ignitor lights the burner.

 

d. Cycle the thermostat on and off a few times to check out the 

control system and burner operation characteristics.

  4. With the burners operating, check the manifold pressure with 

a manometer.  Do not exceed recommended pressures.

  5.  Adjust the unit to obtain an air temperature rise within the range 

that is specified on the unit nameplate.

  

NOTE:  For manifold pressures and orifice sizes for gas with 
other BTU ratings, contact the local gas utility.  Manifold pressure 
should be 1.8  (low) to 3.5 (high)  inches water column  (+0.1).  
Input must 

not exceed the value shown on the unit nameplate.

  6.  Set the heat anticipator of the thermostat to equal the amperage 

draw of the gas valve, approximately 0.7.

  7. Set the thermostat at the desired temperature setting and the 

unit will function automatically.

Starting the Unit in the Gas Heating Mode

  1. Check to make sure all grilles and registers are open and all 

unit access doors are closed before start-up.

  2. Purge the gas supply line of air by opening the union ahead of 

the unit.  When the odor of gas is detected, retighten the union 
and wait five (5) minutes before proceeding.

  3. Set the wall thermostat to its lowest position and place the fan 

switch in the AUTO or ON position.

  4. Open the main gas valve(s) and turn on the unit power supply.

  5. Reset the heating temperature lever on the room thermostat 

at the highest value above room temperature. The combustion 
blower motor should energize. The main burners should light 
within 20-25 seconds. Initial start may be delayed somewhat if 
the unit has not been purged and air is trapped in the gas line.

   NOTE:  Blue smoke produced by the heat exchanger during the 

initial burner firing is caused by a thin film of oil on the surface 
of the heat exchanger. This oil will burn off quickly.

Содержание 4YCY4042C

Страница 1: ...out the evaporator fan or coil access panels in place Reinstall the access panels after performing maintenance proceedures on the fan Operating the unit without the access panels properly installed ma...

Страница 2: ...per service equipment is required Failure to use proper service tools may result in equipment damage or personal injury SERVICE Use only R 410A Refrigerant and approved POE compres sor oil IMPORTANT W...

Страница 3: ...work to Roof Frame 16 Attaching Horizontal Ductwork to Unit 16 Condensate Drain Piping 16 Gas Piping Installation 16 Pipe Delivery Schedule natural gas only 17 Gas Pressure Set up Precautions 17 Gas S...

Страница 4: ...Guide Step 2 Determine Unit Clearances Figure 1 4YCZ6036 1 of 3 Figures 1 through 6 show the unit critical dimensions NOTE The view labeled Bottom Side represents the Base as viewed looking up from u...

Страница 5: ...Page 5 Installer s Guide Figure 2 4YCZ6036 2 of 3...

Страница 6: ...Page 6 Installer s Guide Figure 3 4YCZ6036 3 of 3...

Страница 7: ...Page 7 Installer s Guide Figure 4 4YCZ6048 through 4YCZ6060 1 of 3 NOTE The view labeled Bottom Side represents the Base as viewed looking up from underneath the unit...

Страница 8: ...Page 8 Installer s Guide Figure 5 4YCZ6048 through 4YCZ6060 2 of 3...

Страница 9: ...Page 9 Installer s Guide Figure 6 4YCZ6048 through 4YCZ6060 3 of 3...

Страница 10: ...to the Installation section for instruction on converting the supply and return airflow covers to down airflow 3 The field assembled Roof Mounting Curb BAYCURB050A or BAYCURB051A or a field fabricate...

Страница 11: ...clearance to combustible mate rial shall be maintained on air outlet duct Rooftop Installation Curb Mounting Convert Horizontal Airflow to Down Airflow The factory ships the unit for horizontal airfl...

Страница 12: ...abs or flanges Failure to observe these warnings may result in equipment damage 1 Before preparing the unit for lifting check the unit dimension drawings for center of gravity for lifting safety Figur...

Страница 13: ...roof top applications using field fabricated ducts and sleeper rails rather than a curb or frame use the following procedure 1 Locate and secure the sleeper rails to the roof Three 3 sleeper rails are...

Страница 14: ...ible for the unauthorized use of this drawing and expressly disclaims any liability for damages resulting from such unauthorized use Gasket Seal Spreader Bars Base of unit rest on top of curb rails Dr...

Страница 15: ...rizontal Airflow Application with Frame Supply Air Return Air Roof Flashing Channel Iron Center Support Center Sup port required on all Frame Applications Angle Iron Frame Roof Flashing Return Air Ang...

Страница 16: ...ise and vibration transmission Elbows with turning vanes or splitters are recommended to minimize air noise and resistance The first elbow in the ductwork leaving the unit should be no closer than two...

Страница 17: ...making the gas pipe connection give serious consideration to providing the clearance necessary to remove the accesspanelsontheunit e g economizerandfilteraccesspanels NOTE In the absence of local cod...

Страница 18: ...chonthegasvalveinletboss connect the gas piping to the unit Check the completed piping for leaks using a soap and water solution or the equivalent 6 After installation of the gas pipe in the unit the...

Страница 19: ...ns Models that require 49 orifices for altitudes from 7000 8000 orifices must be changed to 50 HIGH ALTITUDE DERATE CHART NAT Altitude In Feet Inputs shown are with factory orifices 3 5 WC High Fire 1...

Страница 20: ...tioning systems been checked at the service ports for charge and leak tested if necessary Does the condenser fan and indoor blower turn free without rub bing and are they tight on the shafts Has the i...

Страница 21: ...Page 21 Installer s Guide Figure 22 4YCZ6 Field Wiring Diagram NOTE For economizer wiring instructions see the Installer s Guide that came with your economizer...

Страница 22: ...ating Cycle Theseunitsareequippedwithasolid stateignitioncontrolthatlights the burners each time the thermostat calls for heat The burners are extinguished during the OFF cycle The gas heating section...

Страница 23: ...nd postpurge The indoor blower motor will continue to operate at the current speed for 60 or 90 seconds after the flames are extinguished Sequence of Operation Safety Sequences This product is equippe...

Страница 24: ...stible materials gasoline or other flammable vapors or liquids near the unit WARNING Someoftheperiodicmaintenancefunctionsofthe4YCZ6unitcan beperformedbytheowner thisincludesreplacingthedisposable or...

Страница 25: ...Hood and Combustion Blower Cleaning Manifold Pressure Check and Adjust 1 Connect a manometer to the pressure tap at the outlet side of the unit s gas valve remove the Control Heat access panel Read th...

Страница 26: ...3 Flashes Pressure switch problem detected Fast Flash Rate Not used 4 Flashes High Limit switch protection device open Steady ON Normal No Call for Heat 5 Flashes Flame sensed and gas valve not energi...

Страница 27: ...Page 27 Installer s Guide...

Страница 28: ...ide Trane 6200 Troup Highway Tyler TX 75707 9010 The manufacturer has a policy of continuous product and product data improvement and it reserves the right to change design and specification without n...

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