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• This air handler is certified for installation in
residential and light commercial applications
and approved for the following configurations:
−
Vertical: Upflow with bottom or side (left or
right side) return
−
Horizontal (upflow with bottom return)
• All models are designed for indoor installation
only.
• These instructions are intended as a general
guide only and do not supersede national or
local codes. Compliance with all local, state, or
national codes pertaining to this type of
equipment should be determined prior to
installation.
• Read this entire manual, as well as the
instructions supplied in separate equipment,
before starting installation.
• It is recommended that a trained and qualified
professional who has attended a Rinnai
installation training class complete your
installation.
• Installation of the blower section, field wiring,
warm air ducts, etc. must conform to the
requirements of the National Electrical Code,
ANSI/NFPA No. 70 (latest edition) in the United
States, and any state laws, and local
ordinances (including plumbing or wastewater
codes). Local authorities having jurisdiction
should be consulted before installation begins.
Such applicable regulations or requirements
take precedence over the general instructions
in this manual.
• Install the conditioned air plenum, ducts and air
filters (not provided) in accordance with NFPA
90B Standard for the Installation of Warm Air
Heating and Air-Conditioning Systems (latest
edition). The blower section is provided with
flanges for the connection of the plenum and
ducts. Air filters must be listed as Class 2
furnace air filters. The blower section is shipped
from the factory completely assembled.
• For ease in installation, it is best to make any
necessary coil configuration changes before
connecting the air handler to the coil.
• Do not remove the cabinet knockouts until it
has been determined which knockouts need to
be removed for the installation.
• Select the final installation position that best
suits the site conditions. Consider required
clearances, space, and routing requirements for
refrigerant line, condensate disposal, filters,
ductwork, wiring, and accessibility for service.
Refer to the rating plate on the blower section
for specific information.
20
•
When the unit is installed in a humid space
and used in cooling applications, excessive
sweating may occur on outside of unit. To
prevent excessive sweating wrap unit with
1 in. (25 mm) fiberglass insulation. All
openings should be sealed to prevent air
leakage that could cause condensate to
form inside the cabinet.
•
If installed in an unconditioned space,
sealant should be applied around the
electrical wires, refrigerant tubing, and
condensate lines where they enter the
cabinet.
•
Electrical wires should be sealed on the
inside where they exit the conduit opening.
Sealant is required to prevent air leakage
and condensate from forming inside the
blower, control box, and on the electrical
controls.
•
The air handler and its complementing
cooling coil must be installed in such a way
as to allow free access to the air handler/
control compartment.
•
The air handler and its complementing
cooling coil must be installed with a 3/4 in.
(19 mm) drop in the horizontal position
towards the drain pan to ensure proper
condensate drainage. The air handler and
coil should also be tilted 1/2 in. (13 mm)
from back to front toward the drain line.
IMPORTANT
The Clean Air Act of 1990 bans the
intentional venting of refrigerant (CFC's and
HFC's) as of July 1, 1992. Approved
methods of reclaiming must be followed.
Fines and/or incarceration may be levied for
non-compliance.
WARNING
• Do not install this air handler if it is
damaged.
• Do not install this air handler if any part
or all of the unit has been under water.
Explosion Hazard:
• Keep flammable materials and vapors,
such as gasoline, away from this unit.
• Failure to follow these instructions can
result in death, explosion or fire.
Hydronic Air Handler Installation and Operation Manual
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