York ARC 045, Installation Manual

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The scroll compressors and the fans only operate correctly if they rotate in the correct direction. All of
the motors and compressors in the unit are connected so that they rotate correctly.
If the compressors are not connected correctly and are rotating in the wrong direction:
• The compressor will not compress.
• Operating noise will be abnormal.
• Electricity consumption (A) will be low.
• They overheat.
1.16.2 Starting the gas heating, ARG/ARD
D A N G E R
• In order to prevent damage to the gas valves, the burner group should be disconnected form the gas
pipe system during the pressure test.
• Only an Authorised Technical Assistance Service for Johnson Controls Inc. with the appropriate
technical resources and adequately trained personnel may perform the start up tasks for gas heating
on the unit.
Prior checks
1. Check that the type of gas to be used is the same as that specified on the ticket situated to the left of
the gas section access panel.
2. Check that the covers for the gas outlets and the combustion air intake have been correctly installed.
See
General dimensions and accesses (models 045/060) , see on page 11 or General dimensions and
accesses (models 075/090) , see on page 12 .
3. Check that the combustion air intake is free of obstruction from dirt, snow, branches, dry leaves, residue
or other objects.
4. Make sure the the gas supply line complies with safety regulations, that it is able to supply an adequate
flow and pressure of gas, and that it has been purged of air. See
Gas. Insulation and/or duct protec‐
tion. , see on page 23 or Gas. Modification for service with LPG (Liquefied Petroleum Gas, propane
gas) , see on page 24 .
Lighting
The burner is equipped with an automatic lighting system.
D A N G E R
Do not try to start the burner manually.
Start up without the portable YKTOOL test device (accessory)
1. Connect the electrical supply to the unit.
2. Open the unit's gas supply valve.
3. Place the ambient thermostat in the maximum heat.
4. The burner group should light (it might take a few minutes depending on the mode established in the
thermostat)
Post start up checks
Once the entire control circuit is activated and the heating section is operating, the following checks
should be made:
1. Make sure there are no gas leaks either in the unit's pipes or in the supply pipes.
D A N G E R
Never use a flame to verify the absence of leaks in the installation joints. DANGER OF EXPLOSION.
1 Installation manual
1.16 Instructions for starting up the unit
30