Return-To-Return Installation - NuTone GSEH3K Installation Instructions Manual

5. TYPICAL INSTALLATIONS
5.5 R - -R
ETURN TO ETURN
(Connection to a Forced Air System)
5.5.1 C S
RAWL PACE
• Simplify the installation by using the
existing ductwork.
• Non-visible ducts.
• The HEPA Filtration model GSFH1K has
no connection to outside, so all parts
encircled are not required.
CAUTION
When the ambient temperature for the unit
location is below freezing (32°F - 0°C), the unit
must run continuously to prevent condensation.
I
NSTALLATION CONSIDERATIONS:
• Installing the unit near an exterior wall will
shorten the length of the insulated ducts
(not necessary for HEPA Filtration model
GSFH1K).
• If a HEPA Filtration Fresh Air & Heat
Recovery Ventilation model GSHH3K is installed, a water drain must be close to collect the run-off.
• To avoid the cross-contamination and achieve highest efficiencies, the furnace / air handler blower must always be ON (or
the efficiency will be affected).
• The HEPA Filtration Fresh Air Ventilation model GSVH1K needs to be ON all the time, since it doesn't have motorized
dampers. If this unit is OFF, then the furnace / air handler will draw cold outdoor air inside.
• All ducts must be insulated.
• For the HEPA Filtration, Fresh Air & Heat Recovery Ventilation (GSHH3K) and the HEPA Filtration, Fresh Air & Energy
Recovery Ventilation (GSEH3K) models only, if the ambient temperature around the unit drops below freezing (32°F - 0°C),
go to Section 6.11 (Low Temperature Applications) for instructions on drain line protection (GSHH3K only) and other cold
environment installation details.
5.5.2 A
TTIC
• Simplify the installation by using the
existing ductwork.
• Non-visible ducts.
• The HEPA Filtration model GSFH1K has
no connection to outside, so all parts
encircled are not required.
CAUTION
When the ambient temperature for the unit
location is below freezing (32°F - 0°C), the unit
must run continuously to prevent condensation.
INSTALLATION CONSIDERATIONS:
• If a HEPA Filtration Fresh Air & Heat
Recovery Ventilation model GSHH3K is
installed, a water drain must be close to
collect the run-off.
• All ducts must be insulated.
• For the HEPA Filtration, Fresh Air & Heat Recovery Ventilation (GSHH3K) and the HEPA Filtration, Fresh Air & Energy
Recovery Ventilation (GSEH3K) models only, if the ambient temperature around the unit drops below freezing (32°F - 0°C),
go to Section 6.11 (Low Temperature Applications) for instructions on drain line protection (GSHH3K only) and other cold
environment installation details.
(CONT'D)
I
NSTALLATION
VH0043
Drain required only for the GSHH3K.
VH0051
Drain required only for the GSHH3K.
- 13 -
GSVH1K, GSHH3K and GSEH3K
that use fresh outside air.