Final System Setup; Heating Season; Coil Cleaning - Trane RRU150F N Series Installation, Operation And Maintenance Manual

Final System Setup

After completing all of the pre-start and startup
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:

Program all user set points in the System Set Points
screen via the ROD.

Configure optional accessories in the System Setup
screen via the ROD.

Return the unit to normal operation by releasing all
overrides.

Set Date and Time via the Setup (Home Screen) via
the ROD.

Inspect the unit for misplaced tools, hardware, and
debris.

Verify that all exterior panels including the control
panel doors and condenser grilles are secured in
place.

Close the main disconnect switch or circuit protector
switch that provides the supply power to the unit's
terminal block or the unit mounted disconnect switch.

Verify that all overrides have been released.

Heating Season

The flame sensing rod must be positioned as shown in
Figure 16 so that the Electronic Control will detect a proper
flame.
Both the spark and flame rods are current carrying
conductors and, along with their connecting wires, must
be kept free of contact with conductive metal parts of the
burner. Rod insulators and wire insulators should be
clean, dry and free of cracks.
Both the spark and flame rods are made from heat
resistant alloys and can be expected to have a long service
life. They should be routinely inspected, however, for
corrosion or loss of metal.
Should replacement or service be required, valve
manufacturer's instructions must be followed as outlined
in their information sheet.
Outlet pressure settings must be checked while the gas is
flowing.
To adjust outlet pressure, remove the seal cap for access
to the adjusting screw. Turning the screw clockwise will
increase outlet pressure, counter clockwise will decrease
outlet pressure.
The S87 is a low voltage, solid state, direct spark ignition
control module for gas-fired equipment. UL-Listed models
are only available with a pre-purge timer. The S87 controls
the gas valve, monitors the main burner flame and
generates a high voltage for spark ignition.
RRU-SVX02F-EN
Indirect Gas-Fired Heating Start-Up
The S87K uses separate electrodes for spark ignition and
flame sensing. Use with any gas control designed for DSI
application that is rated at 2.0 A or less. Includes a
30-second (minimum) delay for use with system pre-
purge.
For operation characteristics, maintenance, and service
procedures, refer to manufacturer's literature provided
with burner, or contact your Honeywell dealer.
Figure 16. Carriage assembly

Coil Cleaning

Regular coil maintenance, including annual cleaning,
enhances the unit's operating efficiency by minimizing:
compressor head pressure and amperage draw;
evaporator water carryover; fan brake horsepower, due to
increase static pressure losses; airflow reduction.
At least once each year, or more often if the unit is located
in a "dirty" environment, clean the evaporator and
condenser coils using the instructions outlined. Be sure to
follow these instructions as closely as possible to avoid
damaging the coils.
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