Maintenance; Service Maintenance - Trane 4YCC4024E1060A Installation And Operation Manual

Maintenance

Service Maintenance

Service maintenance should be performed by qualified
service personnel.
C C o o o o l l i i n n g g S S e e a a s s o o n n
To keep the unit operating safely and efficiently, the
manufacturer recommends that a qualified service
technician check the entire system at least once each
year or more often if needed. The service technician
should examine these areas of the unit:
• filters (for cleaning or replacement)
• motors and drive system components
• economizer gaskets (for possible replacement)
• safety controls (for mechanical cleaning)
• electrical components and wiring (for possible
replacement and connection tightness)
• condensate drain (for proper sealing and cleaning)
• unit duct connections (to see that they are
physically sound and sealed to the unit casing)
• unit mounting support (for structural integrity)
• the unit (for obvious unit deterioration)
H H e e a a t t i i n n g g S S e e a a s s o o n n
Complete the following unit inspections and service
routines described at the beginning of each heating
season.
• Visually inspect the unit to ensure that the airflow
required for combustion and condenser coil is not
obstructed from the unit.
• Inspect the control panel wiring to verify that all
electrical connections are tight and that the wire
insulation is intact.
• Check the operation of the gas ignition system as
follows: Turn off the gas supply with the unit
operating to verify that the gas valve closes and
that a re-ignition cycle is initiated by the unit.
• Visually inspect the inside of the burners and the
burner ports for deposit buildup and corrosion.
Wipe and brush the inside of the burner and the
burner ports and then clean with a dry cloth. If the
deposit buildup or corrosion is excessive, replace
the burners.
F F l l u u e e H H o o o o d d a a n n d d C C o o m m b b u u s s t t i i o o n n B B l l o o w w e e r r C C l l e e a a n n i i n n g g
N N o o t t e e : : Never use combustible cleaning fluids on any
part of the furnace.
Before each heating season, the flue should be
inspected for signs of flaking rust and soot deposits.
D D i i r r t t y y f f l l u u e e s s s s h h o o u u l l d d b b e e c c l l e e a a n n e e d d b b y y q q u u a a l l i i f f i i e e d d s s e e r r v v i i c c e e
p p e e r r s s o o n n n n e e l l O O N N L L Y Y using the following procedure:
1. Turn the comfort control to O O F F F F . Turn the main
18-EB40D1-1E-EN
power disconnect O O F F F F . Turn the manual gas valve
O O F F F F .
2. Remove the flue hood and the CONTROL/HEAT
access panel.
3. Remove the combustion blower assembly from the
flue box. Remove the flue box and the flue
restrictors.
4. Remove all wires from the gas valve while carefully
noting their locations.
5. Disconnect the gas supply line from the valve.
6. Remove the manifold retaining screws and pull the
burner-manifold assembly from the heat
exchanger.
7. Remove the inlet turbulators being careful not to
break or damage them.
8. Wipe the flue box and flue baffles clean with a
clean, dry cloth.
9. Replace all gaskets with new ones.
10. Replace all damaged or broken turbulators with
new ones.
11. Reassemble the unit by reversing Steps 2 through 7
above. Take care that all gaskets seat properly.
12. Check all wires for correct installation by referring
to the unit's electrical wiring diagram in the
SERVICE FACTS.
13. Leak test all gas line connections with a soap and
water solution or the equivalent.
14. Re-install the CONTROL/HEAT access panels and
the flue hood.
15. Visually inspect the unit to ensure that the airflow
opening for combustion is not obstructed.
16. Follow "Unit Startup," p. 24
in service.
I I n n d d o o o o r r F F a a n n M M o o t t o o r r ( ( I I D D M M ) ) S S p p e e e e d d T T a a p p S S e e t t t t i i n n g g
The 208/230 units are factory set to medium speed.
208/230 Volt Motor Tap Settings ()
High speed setting: On the IGN board:
1. Connect the "RD" wire to the "PARK" terminal.
2. Connect the (IDM) PR wire to the "BLOWER LOAD"
terminal.
Low speed setting: On the IGN board:
1. Connect the "RD" wire to the "BLOWER LOAD"
terminal.
2. Connect the (IDM) PR wire to the "PARK" terminal.
U U n n i i t t S S t t a a r r t t u u p p
to place the unit back
27