Specifications

2008 Residential Appendices RA3-25
Appendix RA3 – Residential Field Verification and Diagnostic Test Protocols
RA3.4 Procedures for Verifying the Presence of a Charge Indicator Display or High
Energy Efficiency Ratio Equipment
RA3.4.1 Purpose and Scope
The purpose of these procedures is to verify that residential space cooling systems and heat pumps have
the required components to achieve the energy efficiency claimed in the compliance documents. The
procedures only apply when a Charge Indicator Display (CID) is specified for split system equipment or
an EER higher than the default is claimed. For dwelling units with multiple systems, the procedures shall
be applied to each system separately.
The installer shall certify to the builder, building official and HERS rater that he/she has installed all the
correct components.
The reference method algorithms adjust (improve) the efficiency of air conditioners and heat pumps when
field verification indicates the specified components are installed. Table RA3.4-1 summarizes the
algorithms that are affected.
Table RA3.4-1 – SUMMARY OF FIELD VERIFICATION
Field Verification Check
Description Standard Design Value
Proposed Design
Default
Value Procedure
Presence of a CID
F
CID
takes on a value
of 0.96 when the
system has a verified
CID or has been
diagnostically tested
for the correct
refrigerant charge.
Otherwise, F
CID
has a
value of 0.90.
Split systems are
assumed to have
refrigerant charge
testing or a CID, when
required by Package D.
No CID or
refrigerant
charge
testing.
Section
RA3.4.2
Presence of a matched High
Efficiency Compressor Unit,
Evaporator Coil, Refrigerant
Metering Device, and
(where specified) Air
Handling Unit and/or Time
Delay Relay.
The EER is the
Energy Efficiency
Ratio at 95 F outdoors
specified according to
ARI procedures for
the matched
combination
Systems are assumed
to have the default EER
based on SEER,
Default
EER
Sections
RA3.4.3
and
RA3.4.4
RA3.4.2 CID Verification Procedure
The procedure shall consist of visual verification that the CID is installed on the system.
RA3.4.3 Time Delay Relay Verification Procedure
Whe
n a high EER system specification includes a time delay relay, the installation of the time delay relay
shall be verified.
The procedure shall be:
1) Turn the thermostat down until the compressor and indoor fan are both running.
2) Turn the thermostat up so the compressor stops running.
3) Verify that the indoor fan continues to run for at least 30 seconds.