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- Measure the negative pressure downstream of the gas unit.

Connect a flexible hose to the gas unit branch connection
(for sizes 063 and 073 the connection is located on the gas
pipe) and connect as electronic pressure gauge, or failing
this a U tube.

- Start the burner by modifying the thermostat's set point or by

using the "test mode" terninals on hte machines terminal
strip.

- Measure the downstream partial vaccum. It must be between

- (minus) 5 mm and  - (minus) 9 mm of water head.

- Check the supply pressure upstream of the gas unit once

more when it is operating to ensure the pressure has not
dropped.

Important note: In the event this measurement is correct,
do not adjust the gas unit setting. It has been set in the
factory.

When the measured partial vaccum is positive (above
atmospheric pressure) or zero
- Remove the paint mark on hte brass threaded plug with two

holes drilled in it, located on the gas unit, and unscrew it
(See Figure 6).

- To increase the partial vaccum turn the screw anti-clockwise.

- Measure the partial vaccum again while the burner is operat-

ing.

- When the adjustment is finished, seal the brass threaded

plug with paint.

It is highly recommended to check the combustion gases with
a flue gas analyser. The measured valves must be within the
following ranges:
-Carbon monoxide (CO) less than 50 PPM
-Oxygen (O2) greater than 1.5%
-Carbon dioxide (CO2) less than 11%

Note: If the correct setting cannot be obtained, contact the
Trane technicians.

Checking the correct operation of the burner
After having iginited the burner a few times, it is necessary to
check the proper operation of the burner safeties by following
the following procedure:

1. Close the main gas valve, and then simulate a demand for

heating. The burner must start, and then stop when the
quantity of gas contained in the pipe between the main
valve and the built-in gas unit has run out. To ensure this
takes place, following the drop in supply pressure, the
LPGS cut-out must open and stop all the gas supply chain
components (fans, gas valve, ignition controller). Any at-
tempt to ignite the system again must fail.

2. Open the main gas valve. The pressure switch LPGS should

automatically reset. The burner can now be put back into
operation.

3. Ignite the burner. Once it is burning, simulate a flame failure

by disconnecting a wire of the flame detection sensor (quick
connect). The ignition controller should immediately stop the
burner and close the gas valve.

4. Reconnect the sensor and re-ignite the burner. Once the

burner is ignited, simulate a high temperature failure by
disconnecting a wire from the sensor TC01. The gas
valve should close and stop the flaem, re-connect TC01.
The ignition sequence will be initiated. The burner
should re-light after about 45 seconds.

5. Once the burner is ignited, simulate overheating by dis-

connecting a wire from the sensor TC02. This stops all
the burner's elements (fan and gas valve should no
longer be energized). Reconnect the TC02 wire.

Adaption to available gases (See Table 3)
The gas-fired heating modules built into YK* units are avail-
able in different categories. The units are supplied ready to
operate using natural gases G20 (20 mbar) and G25 (25
mbar) or using gas  G31 (37 mbar).

The transition from G20 gas to G25 gas does not require
any action. The available power in G25 gas supply is re-
duced.

The transition from G20 to G31 gas requires the following
modifications.
- Change of the gas intake orifice in the burner's fan.
- Implementation of pressure limiter.

 The orfice and the limiter for

supply with gas G31 must be manufactured by Trane.

Start up
Operating check list before the start-up
-Unit is level, with sufficient clearance all round.
-Duct network is correctly dimensioned according to the

unit configuration, insulated and water tight.

-Condensate drainage line is correctly dimensioned,

equipped with trap and sloped.

-Filters are in position: correct size and quantity , clean.
-Wiring is correctly sized, and connected in accordance

with wiring diagrams.

- Power supply lines are protected by recommended fuses

and correctly earthed.

-Thermostat is correctly wired and positioned Unit is

checked for refrigerant charge and leaks.

-Indoor and outdoor fans rotate freely and are fixed on

shafts.

-Indoor fan rotation speed is set.
-Access panels and doors are replaced to prevent air enter-

ing and risks of injury.

-Checking of the gas heating section, in accordance with

above precedure.

 If any operating checks must

be performed with the unit operating, it is the
technicians responsibility to recognize any possible
hazards and proceed in a safe manner. Failure to do so
could result in severe personal injury or death due to
electrical shock or contact with moving parts.

Содержание YKD063C

Страница 1: ...ventional units Refer to the TEST MODES and START UP PROCEDURES before attempting to operate or perform maintenance on this unit Models 50 Hz YK D H 063C YK D H 073C YK D H 089C INSTALLATION OPERATION MAINTENANCE Customer Property Contains wiring service and operation information Please retain Packaged Gas Electric YK 063 YK 089 YK IOM 1 Since the manufacturer has a policy of continuous product im...

Страница 2: ...the factory is designed to use natural gas only Do not connect gas piping to the unit until a line pressure test has been completed Pressure in excess of 34 8 mbar 14 inches water column 1 2 PSIG will damage to the gas valve resulting in an unsafe condition All power legs to the electrical components may not be broken by contactors See the wiring diagram on the unit control box cover Note Warnings...

Страница 3: ...ry component Replaces thermostat provides operator controls and the zone temperature sensor for the UCP A complete line of ZSMs is available with various combinations of features A zone sensor module or a CTI is required for each system UEM Unitary Economizer Module standard component on economizer accessory This module provides the hardware necessary to connect the economizer accessory to the UCP...

Страница 4: ...box cover must be closed Failure to ensure that the evaporator access panel and control box cover is in place could result in severe personal injury or death TEST MODE PROCEDURE Operating the unit from the roof using the test mode The Unitary Control Processor UCP has a red indicator light in the lower left corner When power is applied to the unit the light will glow if the UCP is functioning corr...

Страница 5: ...its With Optional Accessory With Heat Pump Note Steps for optional accessories and modes not present in unit will be skipped The unit can be left in this step for up to one hour If allowed to remain in any test step for more than one hour the test mode will terminate and control will revert to the zone sensor To terminate the test mode remove the resistance and cycle the unit power at the unit dis...

Страница 6: ...86 DOWNFLOW UNIT SI mm TOP VIEW SHOWING DUCT OPENINGS IN THE BASE UNITS mm A B C D E F G YK 063 089 895 386 572 329 83 86 1013 DIMENSIONAL DATA Unit Dimensions SI mm UNITS A B C D E F G H J YK 063 089 889 1259 2211 1062 151 155 211 60 48 Downflow and or Horizontal Figure 1 063 089 Ton Downflow 063 089Ton Horizontal ...

Страница 7: ...4 1170 356 365 556 438 551 464 1076 25 46 919 2073 1178 Dimensions when round ductwork is used Figure 2 Table 3 Field Fabricated Duct Dimensions SI mm UNIT A B C D E F G H J K YK 063 089 1048 38 905 429 1124 575 1124 581 457 457 Curb Dimensions SI mm ...

Страница 8: ...vertical condenser discharge They can be located either at ground level or on a roof in accordance with local and national codes Since these units are designed exclusively for outdoor operation additional flue venting systems are not required Each unit contains an operating charge of Refrigerant as shipped Select a location that will permit unobstructed airflow into the condenser coil and away fro...

Страница 9: ...o a horizontal unit provide a flexible water tight connection to prevent noise trans mission from the unit to the ducts The flexible connec tion must be indoors and molded out of heavy canvas Note Do not draw the canvas taut between the solid ducts See Figure 1 for duct connections Figure 4 Do not use reducing fittings in the drain lines The condensate drain must be Made of 3 4 pipe size Pitched 2...

Страница 10: ...he burner fan then switches into high speed and the heating capacity is raised to maximum When the temperature of the zone has reached the setpoint the UCP de engerizes the relays K5 K6 H and IGN the burner then stops If the indoor fan is set to auto operation it will stop 90 seconds after the burner has stopped in order to recover as much heat as possible from the exchanger To reset the ignition ...

Страница 11: ...11 Figure 5 Figure 6 Detail of the Gas Section ...

Страница 12: ... burning simulate a flame failure by disconnecting a wire of the flame detection sensor quick connect The ignition controller should immediately stop the burner and close the gas valve 4 Reconnect the sensor and re ignite the burner Once the burner is ignited simulate a high temperature failure by disconnecting a wire from the sensor TC01 The gas valve should close and stop the flaem re connect TC...

Страница 13: ...Conditioner 50 Hz EEC Voyager G20 41 4 92 49 1 91 70 6 90 77 4 91 G25 35 0 92 38 3 89 59 4 88 60 3 90 G31 37 7 92 48 6 90 57 3 88 78 2 92 YK 063CD X YK 073CD X YK 073DD X YK 085CD X YK 089CD X YK 100CD X YK 100BD X YK 125CD X YK 155BD X YK 175CD X YK 200BD X YK 250BD X Gas Module Heating Capacity kW PCI Output ...

Страница 14: ...e Gas Flow 15 C 1013 mbar m3 h 4 7 5 3 8 3 8 2 Heat Rate kW 38 0 43 0 67 4 67 0 Reduce Rate Gas Flow 15 C 1013 mbar m3 h 4 5 4 9 7 8 7 9 Heat Rate kW 36 5 40 0 63 4 64 0 Natural Gas G31 30 37ou 50 mbar 88 00 MJ m3 15 C 1013 Injector diameter mm 5 40 6 67 7 37 8 50 Heating Capacity kW 37 7 48 6 57 3 78 2 Minimum Gas Pressure Trip out mbar 20 0 20 0 20 0 20 0 Normal Rate Gas Flow 15 C 1013 mbar m3 h...

Страница 15: ...ediment that may be deposited in the line 4 Before connecting the piping circuit to the unit bleed the air from the supply line Then cap or plug the line and test the pressure at the tapped shut off cock The pressure reading should not exceed 34 8 mbar 14 inches water column 5 Connect the gas piping to the unit Check the completed piping for leaks using a soap and water solution or equivalent Figu...

Страница 16: ...n the unit c Add the total accessory static pressure drop from Step 1b to the design external static pressure The sum of these two values is the total system external static pressure 2 Use the table s in the Service Facts to find the external static pressure in inches water column that most closely approximates total system external static pressure Then locate the appropriate airflow rate in cfm f...

Страница 17: ... diagram for location Figure 10 Typical Field Wiring Diagram Control Wiring Note Some models have a 24 volt transformer with an integral circuit breaker If the breaker trips open unit disconnect before attempting to reset breaker Models with a 50VA transformer do not have this circuit breaker Remove compressor access panel and control box panel to access transformer Reset by pressing in on the bla...

Страница 18: ... no longer R W Y G B etc they are now 1 2 3 4 5 etc Connections should be made using 1 to 1 2 to 2 3 to 3 4 to 4 and so on See example below Zone Sensor Module Low Voltage Terminal Strip ZSM LTB 1 1 2 2 3 3 4 4 5 5 Zone Temperature Sensor Terminal Strip Terminal Terminal I D 1 ZTEMP 2 SIGNAL COMMON 3 CSP 4 MODE 5 HSP 6 LED COMMON 7 HEAT LED 8 COOL LED 9 SYS ON LED 10 SERVICE LED ...

Страница 19: ...19 Figure 11A Zone Sensor Interconnecting Diagram ...

Страница 20: ...20 Figure 11B Conventional Thermostat Interconnections ...

Страница 21: ...tics checks which include identifying the equipment components of its system and the configuring of itself to that system It also checks itself to be sure it is function ing correctly On units with the optional economizer the damper is driven open for 15 20 seconds and then fully closed The UCP system indicator LED is turned to ON within one second of start up if operation is correct Starting the ...

Страница 22: ...ture rise noted is outside of the specified limits adjust the fan motor rpm to cause the temperature rise of the heat exchanger to fall within the required range Open and lock unit disconnect switch before continuing installation Failure to do so could result in severe personal injury or death due to electrical shock or contact with moving parts Do not operate the unit without the evaporator fan a...

Страница 23: ...e Facts to deter mine the unit refrigerant charge The correct charge is shown on the unit nameplate To charge the system accurately use superheat charging or weigh the charge Voltage With the compressor operating check the line voltage at the unit The voltage should be within the range shown on the unit nameplate If low voltage is encountered check the size and length of the supply line from the m...

Страница 24: ... duct connections to ensure they are physically sound and sealed to the unit casing 9 Inspect the unit mounting support to see that it is sound 10 Inspect the unit to ensure there is no obvious deterioration Final Installation Checklist Does unit run and operate as described in the Sequence of Operation in the unit Service Facts Is the condenser fan and indoor blower operating correctly with prope...

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