Trane Precedent TSC060, Установка, эксплуатация и обслуживание

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35
T_C-IOM-2A
Monthly Maintenance
Before completing the following checks,
turn the unit OFF and lock the main power
disconnect switch open.
HAZARDOUS VOLTAGE!
DISCONNECT ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE SERVICING.
Failure to disconnect power before
servicing can cause severe personal injury
or death.
Filters
[ ] Inspect the return air filters. Clean or re-
place them if necessary. Refer to the
unit Service Facts for filter information.
Cooling Season
[ ] Check the unit’s drain pans and con-
densate piping to ensure that there
are no blockages.
[ ] Inspect the evaporator and condenser
coils for dirt, bent fins, etc. If the coils
appear dirty, clean them according to
the instructions described in “Coil
Cleaning” later in this section.
[ ] Manually rotate the condenser fan(s) to
ensure free movement and check mo-
tor bearings for wear. Verify that all of
the fan mounting hardware is tight.
[ ] Inspect the F/A-R/A damper hinges
and pins to ensure that all moving
parts are securely mounted. Keep the
blades clean as necessary.
[ ] Verify that all damper linkages move
freely; lubricate with white grease, if
necessary.
[ ] Check supply fan motor bearings; re-
pair or replace the motor as neces-
sary.
[ ] Check the fan shaft bearings for wear.
Replace the bearings as necessary.
[ ] Check the supply fan belt. If the belt is
frayed or worn, replace it. Refer to the
“Fan Belt Adjustment” section for belt
replacement and adjustments.
Maintenance
[ ] Verify that all wire terminal connections
are tight.
[ ] Remove any corrosion present on the
exterior surfaces of the unit and repaint
these areas.
[ ] Generally inspect the unit for unusual
conditions (e.g., loose access panels,
leaking piping connections, etc.)
[ ] Make sure that all retaining screws are
reinstalled in the unit access panels
once these checks are complete.
[ ] With the unit running, check and record
the: ambient temperature; compres-
sor suction and discharge pressures
(each circuit); superheat (each circuit);
Record this data on an “operator’s main-
tenance log” like the one shown in Table
7. If the operating pressures indicate a
refrigerant shortage, measure the system
superheat. For guidelines, refer to the
“Compressor Start-Up” section.
Note:
Do Not release refrigerant to the
atmosphere! If adding or removing
refrigerant is required, the service
technician must comply with all federal,
state and local laws.
Heating Season
[ ] Inspect the unit’s air filters. If neces-
sary, clean or replace them.
[ ] Check supply fan motor bearings; re-
pair or replace the motor as neces-
sary.
[ ] Inspect both the main unit control panel
and heat section control box for loose
electrical components and terminal
connections, as well as damaged wire
insulation. Make any necessary re-
pairs.
[ ] Verify that the electric heat system op-
erates properly.
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 pres-
sure 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 below. Be
sure to follow these instructions as
closely as possible to avoid damaging
the coils.
To clean refrigerant coils, use a soft brush
and a sprayer (either a garden pump-up
type or a high-pressure sprayer). A high-
quality detergent is also required; sug-
gested brands include “SPREX A.C.”,
“OAKITE 161”, “OAKITE 166” and
“COILOX”. If the detergent selected is
strongly alkaline (ph value exceeds 8.5),
add an inhibitor.
1. Remove enough panels from the unit
to gain access to the coil.
2. Protect all electrical devices such as
motors and controllers from any over
spray.
3. Straighten any bent coil fins with a fin
comb.
4. Mix the detergent with water according
to the manufacturer’s instructions. If de-
sired, heat the solution to 150
o
F
(65.6
o
C) maximum to improve its
cleansing capability.