Lennox Baltic BCK 020, Installation Operating & Maintenance Manual

Page: 99 / 110

Page 98 - IOM / ROOFTOP BALTIC Series - 0
8
03 - E
MAINTENANCE PLAN
TA
S
K
Clean or replace filters: Disposable, or met
al frame.
V
isual check of the oil level
Position check of the compressor crankcase heater
.
Belt tension check. Centrifugal fan bearings check Check absorbed
Amp
s
Check Smoke detector Check Climatic control, set-point
s and
variables Check clock settings Check the position and tightness of refrigeration component
s
Check
Airflow rate safety switch (if fitted).
Check freeze protection on HWC Check three way valve on HWC Check economiser actuator operation Check refrigeration 4way valve Check tightness of all electrical connec- tions
OPERA
TING MODE
Replace filters with new ones if disposable. V
acuum clean or
blow the dirt. W
ash and dry carefully
. +Replace media if
necessary Blocked filter will reduced the performance of the unit. THE UNIT
MUST
NOT
OPERA
TE WITHOUT
FIL
TERS
V
isually check the oil level through the sight glass on the side of
the compressor casing Check the heating resist
ance is fitted properly and tight around
the compressor body
.
Check belt tension (Info in IOM) Replace belt if necessary
.
Isolate unit from the main power supply; Push the fan wheel manually and check for abnormal noises. Bearings are lubricated for life but may need replacement af
ter 10000 hours
Check absorbed
Amp
s on all three phases; comp
are with the
nominal value given in the electrical wiring diagram. S
tart the unit.
T
rigger the smoke detector by moving a magnet
around the detector head. Reset unit and control. Refer to the commissioning sheet; Check all set point
s are set
according to this document. Check the time and date of the control Check systematically all connections and fixings on the refrigeration circuit. Check for oil traces, eventually a leak test should be conducted. Check operating pressures correspond to the ones indicated on the commissioning sheet Shut down supply fan.
The fault must be detected within 5
seconds. Increase room set-point 10°C above the actual room temperature. Check operation of the piston. It must move away from the valve head. Reset the control. Check all fixings and transmission. S
top the unit using the
control.
The fresh air damper must closes. S
tart the unit the
fresh air damper should open With the unit running in cooling mode increase the room set- point temperature by 10°C.
The unit should switch to heat pump
mode. Reset the control. Power down the unit and check and tighten all screws, terminal and electric connections, t
aking a p
articular attention to the
power lines and low volt
age control wires
6
YEARL
Y
E
S
T
IM
A
T
E
D
MONTHL
Y
QUARTERL
Y
M
O
N
T
H
LY
B
4
T
IM
E
WINTER
(mn)
0
20
0
2
0
2
0
10
0
10
∆
15
∆
5
∆
15
05 ∆
30
0
∆
5
∆
5
∆
5
∆
5
∆
30
Table 1
6