First Co HBQB User Manual
HBQB/MBQB SERIES FAN COIL UNIT
****** W ARNING ******
Unit must not be operated
during building construction
due to excessive airborne dust
and debris. The unit must not
be operated under any
circumstances without an air
filter in place.
****** W ARNING ******
Any devices such as fan
switches or thermostats that
have been furnished by the
factory for field installation
must be wired in strict accordance with the wiring diagram
that is supplied with the unit.
Failure to do so could result
in damage to components
and will void all warranties.
****** W ARNING ******
Extreme caution must be
taken that no internal damage
will result if screws or holes are
drilled into the cabinet.
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
**WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER**
Altering the product or replacing parts with non authorized factory part s voids all warranty or implied warranty
and may result in adverse operational performance and/or a possible hazardous safety condition to service
personnel and occupants. Company employees and/or contractors are not authorized to waive this warning.
Current Maintenance Program is available at www.firstco.com under "Product Information".
GENERAL
The manufacturer assumes no responsibility for equipment installed in
violation of any code requirement.
These instructions give information
relative to the installation of these fan
coil units only. For other related
equipment refer to the proper instructions.
Material in this shipment has been
inspected at the factory and released
to the transportation agency in good
condition. When received, a visual
inspection of all cartons should be
made immediately. Any evidence of
rough handling or apparent damage
should be noted on the delivery receipt and the material inspected in
the presence of the carrier’s representative. If damage is found, a claim
should be filed against the carrier
immediately.
Note: State of MA.-248 CMR code of the
state of MA. requires a pump timer (60
seconds on every 6 hours). See diagram.
FAN COIL UNIT
The installer must adhere strictly
to all local and national code requirements pertaining to the installation of
this equipment.
These units are designed to be
installed in either an upflow or horizontal position.
All fan coil units are U.L. listed for
installation with zero inches clearance to combustible materials. This
includes the unit cabinet, discharge
plenum and connecting ducts. Sufficient clearance must be provided at
the front of the unit to allow access to
electrical controls and removal of the
motor / blower assembly for servicing.
This clearance distance should be
approximately the same depth as the
fan coil unit.
HORIZONTAL
APPLICATION
The HBQB and MBQB fan coil units
are factory assembled for horizontal
left side down application without any
modification required. To convert to
horizontal right side down, remove
horizontal drain pan and A-coil assembly, flip horizontal drain pan over
to right side and reinstall horizontal
drain pan and A-coil into cabinet. Secure forward edge of horizontal drain
pan with angle bracket. The unit
should be leveled in such a way that
there is slope toward the condensate
drain nipple to assure positive drainage.
AIR DISTRIBUTION
DUCTS
All duct work must be installed in
accordance with National Fire Protection Association Codes 90A and 90B.
Ducts should be adequately insulated
to prevent condensation during the
cooling cycle and to minimize heat
loss during the heating cycle. All
return air must be filtered to prevent
dirt buildup on the coil surface. If there
is no ducted return, applicable installation codes may limit the unit to
installation only in a single story residence. In many cases it is acceptable to use ducting of the same size
as the fan coil connections. However,
unique arrangements or long duct
runs must be confirmed by a local
professional. The manufacturer will
not be responsible for misapplied
equipment.
ELECTRICAL
All wiring must comply with local
and national code requirements.
Units are provided with wiring diagrams and nameplate data to provide
information required for necessary
field wiring.
These units may be provided with a
Class 2 transformer for 24-volt control
circuits. Should any add-on equipment also have a Class 2 transformer
furnished, care must be taken to prevent interconnecting outputs of the
two transformers by using a thermostat with isolating contacts.
L3771D 02/09
INSTALLATION
****** WARNING ******
Do not touch any rotating
component with any object.
Damage to the equipment and
personal injury can occur.
****** WARNING ******
When connecting piping to
fan coil units, do not bend or
reposition the coil header tubing for alignment purposes.
This could cause a tubing fracture resulting in a water leak
when water pressure is applied to the system.
PRECAUTIONS
Installation of this fan coil should
only be performed by properly trained
personnel to ensure proper installation and the safety of the installer.
The following are some precautions to
be followed for typical installations.
• Always use proper tools and equipment.
• No wiring or other work should be
attempted without first ensuring that
the fan coil is completely disconnected from the power source and
locked out. Always verify that a good
ground connection exists prior to energizing any power sources.
• Always review the nameplate on
each unit for proper voltage and control configurations. This information
is determined from the components
and wiring of the unit and may vary
from unit to unit.
• When soldering or brazing to the
unit, it is recommended to have a fire
extinguisher readily available. When
soldering close to valve packages or
other components, heat shields or
wet rags are required to prevent damage.
• When the fan coil unit is in operation components are rotating at high
speeds.
• Units must be installed level to
ensure proper drainage and operation.
• Check unit prior to operation to
ensure that the condensate water will
drain toward the drain connection. An
overflow drain or an auxiliary drain
pan under the fan coil may be required
as a back up to a clogged primary
drain.
• Be sure that the drain pan is free
from foreign material prior to start up.
• Check filter media installation to
ensure that it is installed correctly.
Use the directional arrows or other
information on the filter to determine
the proper flow direction.
• Ensure that the air distribution system does not exceed the external
static rating of the unit.
COOLING COIL PIPING
The HBQB and MBQB fan coil
units are supplied with a direct expansion refrigerant coil. The suction and
liquid refrigerant lines must be sized
in accordance with the outdoor unit
manufacturer’s recommendations.
Condensate drain lines must be
installed with adequate slope away
from the unit to assure positive drainage. Since the drain pan is located on
the suction side of the blower, a
negative pressure exists at the drain
pan and a minimum trap of 1-1/2
inches must be provided in the drain
line to assure proper drainage.
NOTE: If a Condensate Overflow
Shut-off Switch, that is designed to
be installed in the drain line, is used
in place of a secondary drain line, then
the cut-off switch should be located
in the primary drain line between the
fan coil unit and the P-trap.
HOT WATER COIL
PIPING PRECAUTIONS
• Flush all field piping prior to connection to remove all debris.
• Use wet cotton rags to cool valve
bodies when soldering.
• Open all valves (midway for hand
valves, manually open on motorized
valves) prior to soldering.
• When soldering to bronze or brass,
heat the piping while in the socket/
cup and begin introducing the solder
when the flux boils rapidly.
Avoid direct flame into the solder joint.
• Heat can only be applied to the cup
of the valve body for a minimal time
before damage occurs (even with the
use of wet rags.
• Avoid rapid quenching of solder
joints as this will produce joints of
inferior quality.
• Connect all piping per accepted
industry standards and observe all
regulations governing installation of
piping systems. When all connections are complete the system must
be pressure tested. Repair any solder joint leaks and gently tighten any
leaking valve packing nuts and piping
accessories as required. Hydronic
systems are not designed to hold
pressurized air and should only be
tested with water.
HOT WATER COIL PIPING
Figure 1 illustrates a typical piping
schematic for an Aqua Therm System.
The hot water coil connections are
3/4 inch nominal (7/8” OD) copper
except the 60HBQB or MBQB is 1
inch nominal (1-1/8” OD). The hot
water supply to the fan coil should be
on the right when facing the fan coil
upright and from the front.
****** WARNING ******
An expansion tank may be
required if a back-flow
preventer is installed in the
system.
All piping between the water heater
and fan coil unit should be copper and
should not exceed 200 feet of total
piping. It is recommended that 3/4”
nominal (7/8” OD) piping should be
used on 18 to 48HBQB or MBQB
units and 1” nominal (1-1/8” OD) on
60HBQB or MBQB units to prevent
excessive head pressure losses.
(Consult the factory for other piping
applications.)
It is also recommended that all
piping be adequately insulated to prevent freezing when piping is run in an
unconditioned space.
Solder Connections - All copper
joints in the water lines must be made
with low temperature - non lead
solder.
"T" Connections (at the water
heater) Water lines to and from the fan coil
unit must be taken from the horizontal
connection of the "T" fittings in the
vertical hot and cold water supply
lines at the water heater. This ensures that any air in the system will be
purged each time water is used in the
dwelling. (See figure 1)
Isolation Valves - Two valves are
recommended to be installed within
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