Trane UV-SVN02B-EN, Installation Operation & Maintenance, Page: 46 / 52

46 UV-SVN002-EN
Maintenance
Motor
The fan motor is a permanent split
capacitor type motor with 115V power
(Tables 7 and 8). If a replacement motor
is required, it should be ordered from
The Trane Company.
To replace the fan motor, complete the
following steps:
1. Turn off power to the unit and
remove the front cover.
2. Complete steps for return air grille
and filter removal.
3. Complete steps for removal of drain
pan if Face & Bypass option is
installed.
4. Complete steps for removal of fan
board.
5. Disconnect the motor ground wire
6. Using a 7/16” Allen wrench, loosen
the coupling on the fan shaft.
7. Loosen the screw on the motor clamp
until it allow the motor to be lifted off
the base. (
Figure 56 )
8. Lift the motor and pull forward until
fan shaft separates from the motor.
(
Figure 57 ).
9. Attach new motor to fan shaft and
reverse steps to complete instal-
lation.
Modulating Valves
The valve should be services by a
trained, experienced technician. For
detailed installation and removal steps,
refer to Pages 28 & 29 in this manual).
For general servicing or malfunction,
follow one of the appropriate steps:
1. If the valve is leaking, drain system
OR isolate valve from the system. DO
NOT remove valve body from
plumbing.
2. Check to see if the cartridge needs to
be replaced. If so, follow appropriate
steps explained for cartridge
assembly removal.
3. If the motor or other internal parts of
the actuator is damaged, replace the
entire actuator assembly.
NOTE: These hydronic valves are
designed and tested for silent opera-
tion. However, water noise may occur
as a result of high water velocity. Piping
noises may also occur in high tempera-
ture (over 212 F) systems with insuffi-
cient water pressure.
NOTE: Do not use petroleum-based or
mineral oil type boiler additives.
Compounds with a 50% water dilution
that can be used are diethylene glycol,
etheylene glycol and propylene glycol.
Preventive Maintenance
A comprehensive preventive mainte-
nance program should be established
for a unit ventilator system. The follow-
ing are several key elements:
• Inspect the filters monthly. .
• Inspect and clean the drain pans
every three months.
• Check the coils for ‘‘dirt’’ accumula-
tion every three to six months.
• Clean the coils at least once each
year.
• Inspect the unit ventilator insulation
every three months; thoroughly clean
as needed.
Figure 55: Loosening coupling on the
fan shaft.
Figure 56: Loosening the clamp of fan
motor.
Figure 57: Remove the fan motor by
lifting up and pulling forward.