Bard QTEC Q24A1D Series, Руководство по установке

Страница: 30 / 41

Manual 2100-523
Page
30 of 41
6. Some service requires the need to remove the unit
from the wall including replacement of the indoor
coil and/or the outdoor coil. Also servicing the
outdoor fan motor or fan blade will require
removing the unit from the wall if the unit is
installed at a height that is not easily accessible
from the outside of the building.
In order to remove the unit from the wall the
following procedure must be used:
a. Turn off power to the unit at the remote
location. Some units may have more than one
power supply.
b. Disconnect field wiring at unit terminal block
and remove from unit.
c. Disconnect condensate drain.
d. Remove the lower skirting around the unit.
e. Remove wall mounting brackets from wall on
each side of the unit.
f. If unit is attached to duct work, remove upper
cabinet extension by removing the top center
screw only from the cabinet side panel.
g. Remove screws that attach the duct work to
the unit flanges.
This unit is equipped with four rollers
mounted to the base. For ease of pulling unit
out from the wall, you may want to remove
the bottom service door which requires
removal of the return air panel, and grip the
front flange of the base pan then pull straight
out.
7. Annual maintenance is required to make sure that
all of the systems are functioning properly.
a. Check to make sure that the drains are not
obstructed in any way.
b. Remove any debris in the condenser section of
the unit.
c. Inspect and clean mist eliminator as described
below.
d. Inspect and wash outdoor coil as necessary.
MIST ELIMINATOR SERVICE
A mist eliminator is supplied with the wall sleeve. The
mist eliminator is constructed of an aluminum frame
and mesh. The mist eliminator is located in the top
section of the wall sleeve and can be removed from the
inside of the building without removing the unit from
the wall. This requires that the ventilation package must
be removed.
It is recommended that the mist eliminator be inspected
annually and serviced as required. The mist eliminator
can be inspected from the outside of the building by
looking through the outdoor grille. The mist eliminator
can be serviced from the outside by using a vacuum
cleaner. The outdoor grille must be removed. Use the
vacuum to remove dirt and debris from the surface of the
mist eliminator. If additional cleaning is required, the
mist eliminator will have to be removed from the sleeve.
The ventilation package will have to be removed to gain
access to the mist eliminator. If the blank off plate
option is used, it is not necessary to service the mist
eliminator. The steps necessary to remove each of the
vent options are listed on the following pages.
The mist eliminator can be cleaned by washing with
soap and water. The excess water should be shaken off
the mist eliminator before it is reinstalled.
VENT OPTIONS
BAROMETRIC FRESH AIR DAMPER (Standard)
Before starting, make sure the power has been turned
off. The return air grille panel must be removed. The
fresh air damper assembly can be seen on the back of the
unit. See Figure 21.
1. The fresh air damper is attached to the back of the
unit with one screw on either side of the
assembly. Both of the screws must be removed.
2. Once the mounting screws are removed, tilt the
assembly down and lift it out.
The mist eliminator can be seen through the opening.
The mist eliminator must be raised up and the bottom
can be pulled toward the front of the unit.
ECONOMIZER OR COMMERCIAL ROOM
VENTILATOR (Option)
Before starting, make sure the power has been turned
off. The return air grille panel must be removed. The
economizer (EIFM) or commercial room ventilator
(CRV) can be seen after the panel has been removed.
The CRV or EIFM must be removed to gain access to
the mist eliminator.
1. The two mounting screws in the front of the
EIFM or CRV must be removed.
2. The power connectors for the CRV (located on
the right side of the unit) must be disconnected.
Squeeze the tabs on the sides of the connector and
pull straight out. Unplug both of the connectors.
3. Slide the EIFM or CRV straight out of the unit.