First Co HBQB User Manual

HBQB/MBQB SERIES FAN COIL UNIT

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

**WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER**

Altering the product or replacing parts with non authorized factory parts 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 re-

includes the unit cabinet, discharge

to prevent condensation during the

plenum and connecting ducts. Suffi-

cooling cycle and to minimize heat

sponsibility for equipment installed in

cient clearance must be provided at

loss during the heating cycle. All

violation of any code requirement.

the front of the unit to allow access to

return air must be filtered to prevent

Theseinstructionsgiveinformation

electrical controls and removal of the

dirtbuilduponthecoilsurface. Ifthere

relative to the installation of these fan

motor/blowerassemblyforservicing.

is no ducted return, applicable instal-

coil units only. For other related

This clearance distance should be

lation codes may limit the unit to

equipment refer to the proper instruc-

installation only in a single story resi-

tions.

dence. In many cases it is accept-

Material in this shipment has been

****** WARNING ******

able to use ducting of the same size

inspected at the factory and released

Unit must not be operated

as the fan coil connections. However,

to the transportation agency in good

during building construction

unique arrangements or long duct

condition. When received, a visual

due to excessive airborne dust

runs must be confirmed by a local

professional. The manufacturer will

inspection of all cartons should be

and debris. The unit must not

not be responsible for misapplied

made immediately. Any evidence of

be operated under any

equipment.

rough handling or apparent damage

circumstances without an air

should be noted on the delivery re-

filter in place.

ELECTRICAL

ceipt and the material inspected in

All wiring must comply with local

the presence of the carrier’s repre-

approximately the same depth as the

and national code requirements.

sentative. If damage is found, a claim

Units are provided with wiring dia-

should be filed against the carrier

fan coil unit.

grams and nameplate data to provide

immediately.

HORIZONTAL

information required for necessary

Note:StateofMA.-248CMRcodeofthe

field wiring.

state of MA. requires a pump timer (60

APPLICATION

Theseunitsmaybeprovidedwitha

seconds on every 6 hours). See dia-

The HBQB and MBQB fan coil units

Class2 transformerfor 24-voltcontrol

gram.

are factory assembled for horizontal

circuits. Should any add-on equip-

FAN COIL UNIT

left side down application without any

ment also have a Class 2 transformer

modification required. To convert to

furnished, care must be taken to pre-

The installer must adhere strictly

horizontal right side down, remove

vent interconnecting outputs of the

horizontal drain pan and A-coil as-

two transformers by using a thermo-

to all local and national code require-

ments pertaining to the installation of

sembly, flip horizontal drain pan over

stat with isolating contacts.

to right side and reinstall horizontal

this equipment.

drain pan and A-coil into cabinet. Se-

cure forward edge of horizontal drain

****** WARNING ******

****** WARNING ******

pan with angle bracket. The unit

Any devices such as fan

Extreme caution must be

should be leveled in such a way that

switches or thermostats that

taken that no internal damage

there is slope toward the condensate

have been furnished by the

willresultifscrewsorholesare

drain nipple to assure positive drain-

factory for field installation

drilled into the cabinet.

age.

must be wired in strict accor-

AIR DISTRIBUTION

dance with the wiring diagram

These units are designed to be

DUCTS

that is supplied with the unit.

installed in either an upflow or horizon-

All duct work must be installed in

Failure to do so could result

tal position.

accordance with National Fire Protec-

in damage to components

All fan coil units are U.L. listed for

tion Association Codes 90A and 90B.

and will void all warranties.

installation with zero inches clear-

Ducts should be adequately insulated

ance to combustible materials. This

L3771D

02/09

INSTALLATION

PRECAUTIONS

Installation of this fan coil should only be performed by properly trained personnel to ensure proper installation and the safety of the installer. Thefollowingaresomeprecautionsto 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.

****** WARNING ******

Do not touch any rotating component with any object. Damage to the equipment and personal injury can occur.

•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 panunderthefancoilmayberequired 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 directflameintothesolderjoint.

•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

****** 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.

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.

Allpipingbetweenthewaterheater 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