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Figure 108. Main gas regulator and inlet pressure tap
locations
Tap location for outlet
pressure from main gas regulator
Main gas regulator
Figure 109. Manifold pressure tap location — ultra
modulating
Tap location
for manifold
pressure
RT-SVX072D-EN
Tap location for
Pilot gas
inlet pressure
regulator
Figure 110. Air damper location — ultra modulating
Final Unit Checkout
After completing all of the checkout and start-up
procedures outlined in the previous sections (i.e., operating
the unit in each of its Modes through all available stages of
cooling and heating), perform these final checks before
leaving the unit:
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
Important: HIGH VOLTAGE IS PRESENT AT TERMINAL
BLOCK OR UNIT DISCONNECT SWITCH.
☐ Close the disconnect switch or circuit protector switch
that provides the supply power to the unit terminal block
(2XD1 on 20-75T units / 1XD1 on 90-130T units)or the
unit mounted disconnect switch (2QB1 on 20-75T units
/ 1QB1 on 90-130T units).
☐ Turn the 115 volt control circuit switch (1S1) to the "On"
position.
☐ Turn the 115 volt control circuit switch (1S20) to the
"On" position. (90-130T units only)
Unit Start-up
Air damper
125
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