First Co FRR User Manual

RR / RM / RS

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

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

Altering the product or replacing p arts 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".

NOTE: Read the entire installation instruction manual before starting the installation.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other
conditions which may cause personal injury or property damage. Consult a qualified licensed installer, service agency, or
your distributor for information or assistance. The qualified licensed installer or service agency must use factory-authorized
kits or accessories when servicing this product. Refer to the individual instructions packaged with kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult
local building codes and National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety-alert symbol . When you see this symbol on the unit and in instruc­tions manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert
symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which would
result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.

WARNING: Before installing or servicing unit, always turn off all power to unit. There may be more than

one disconnect switch. T urn off accessory heater power if applicable. Electrical shock can cause personal
injury or death.

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L2760 06/08

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 air handlers 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.
In keeping with its policy of continuous progress and product improvement, the manufacturer reserves the right to discontinue
or change without notice any or all specifications or designs without incurring obligations.

INTRODUCTION

Model nomenclature for the air handlers described in this installation instruction are as follows:

RR - Furred-in, single unit designed for concealed applications along room walls or corners.
RM- Furred-in master component to be coupled through risers to corresponding slave unit.
RS - Furred-in slave component coupled to master, but with all independent controls and valving.

The air handler units are designed for vertical, “stacked”, applications with nominal air capacities of 300 through 1200 CFM.
Models incorporate a positive slope metal or plastic removable drain pan with 3/4” copper drain coupling. Optional
equipment includes, multiple coil combinations in three, four and five row water coils, multiple supply grille and riser
position combinations, fresh air inlets and multiple combinations of valve packages. T wo pipe heating and cooling, two pipe
with auxillary electric heat, four pipe heating and cooling and four pipe with auxillary electric heat are available with manual
or automatic changeover controls with two types of thermostat options.

INSTALLATION

The licensed installer must adhere strictly to all local and national code requirements pertaining to the installation of this
equipment.
All air handling units are agency listed for installation with zero inches clearance to combustible materials. This includes the unit
cabinet, supply grilles or connecting ducts if installed.
All maintenance or servicing is accomplished through the return air grille opening where access is provided to all electrical and
plumbing connections.

Installation Precautions

While awaiting installation, always protect units from adverse weather conditions, theft or vandalism at the jobsite.
No wiring or other work should be attempted without first ensuring that the air handler 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.
Units must be installed level to ensure proper drainage and operation.
Be sure that the drain pan is free from foreign construction 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.

WARNING: Never use the risers to lift the units. Risers are fitted loosely within expansion guides and attached

to coil feed pipes which can be damaged.

CAUTION: When securing drywall or other wall treatments to this cabinet take care to avoid penetration into the
coil, manifolding or electrical wiring by fasteners which could cause flooding or an electrical shock hazzard.

PROCEDURE 1 – CHECK EQUIPMENT

Unpack unit and move to final location. Remove packaging taking care not to damage unit. Inspect air handler unit for
damage prior to installation. File a claim with shipping company if shipment is damaged. Carefully inspect blower for rough
handling that can cause misalignment or shaft damage. Check to make sure the valve packages have not been damaged
during shipment. Check ID tags for riser tier, floor and room numbers then ensure proper placement before proceeding with

the installation.Blow out risers if protective caps are missing and cover again with tape or foil.

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PROCEDURE 2 – INST ALL AIR HANDLER

CAUTION: Extreme caution must be taken that no internal damage will result if screws or holes are drilled

into the cabinet. Failure to follow this CAUTION could result in product or property damage and minor
personal injury.

CAUTION: The unit should be leveled in such a way that there is slope toward the condensate drain pan

nipple to assure positive drainage. This is taken care of if the unit is level and plumb.

Set Units in Place

Begin on the lowest floor and progress upward floor by floor to the top. Remove bottom protective caps and top caps from
unit below. T ip unit over riser chase hole in the building floor. As the unit is righted, align the risers with the unit below . If

required, then install isolator pads, field supplied, beneath the four corners of the cabinet now .

3” Flares

Level side to side
Front to back

Attach Unit Risers.

Each riser has a 3” flared opening at the top to acommodate the riser of the unit on the next floor. An insertion of 2” is
normal. Bottoming would create a form of preloading which is undesirable. If, due to building characteristics, an extension is
required to mate to the previous unit, or the next, then install it now . Level unit to ensure proper condensate drainage. Make
plumb in 2 directions and then anchor to the building using lag screws or bolts.
After all units in a vertical column are anchored make unit to unit riser connections. First, center each riser on the cabinet
opening. Get as vertical a placement as the riser chase will allow. A minimum insertion depth of 1” is required into each flare
of previous unit riser. Now solder to seal union using silfos or appropriate high temperature alloy.

WARNING: Do not use soft, low temperature solders like 50-50, 60-40 or 85-15. With copper expansion

and contraction this type of bond will fail.

Anchor Risers as Required.

Risers are not to be rigidly attached to each air handler cabinet. They need to be free to expand and contract as temperatures
vary within the pipe and riser chase. They do, however, need to be fastened to the building at strategic points along the
column length. Building code will describe frequency and type. Reference ASME B31.9 or similar .
The units are designed to allow movement of +/- 1” (2” total) under normal circumstances. Expansion loops will be required
in each riser if the calculated movement is in excess of 2”. Expansion loops are described and formulated by the ASHRAE
HVAC Systems and Equipment handbook and copper.org

NOTE: Expansion loop design and placement is a function of and best prescribed by consulting and design engi-

neers.

Perform Hydrostatic Testing.

After all solder joints are made and all risers appropriately anchored perform hydrostatic testing for leaks.
Vent all individual coils while checking for signs of leakage within each cabinet using the manual header vents provided.
Once testing is complete, continue to insulate all unions just brazed so that insulation is now covering all riser surfaces. If
required by fire code seal riser chase openings using correct fire rated materials now .

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