Ductwork Preparation - Thermador PH60GS Installation Instructions Manual

When connected to a GFCI-protected supply,
THERMADOR PROFESSIONAL
use in damp locations that are protected from outside
weather conditions and not subject to saturation with water
and other liquids, but can be subject to moderate degrees
of moisture (such as an outdoor covered patio or lanai
area). Refer to local codes, NEC/CEC, and or the Authority
Having Jurisdiction (AHJ) for additional information.
Check your local building codes for proper method of
installation. In the U.S., if there are no applicable local
codes, this unit should be installed in accordance with the
National Electric Code ANSI/NFPA No. 70, Current Issue.
In Canada, installation must be in accordance with the CAN
1- B149.1 and .2 - Installation Codes for Gas Burning
Appliances and/or local codes.
The appliance must be grounded. In the event of an
electrical short circuit, grounding reduces the risk of electric
shock by providing a wire that allows the electric current to
escape.
WARNING
The appliance must be grounded.
Electrical Data on the Data Rating Plate
Data, including the model and serial number, is located on
the product data rating plate inside the appliance, visible
after removal of the filter frame (see Figure 30 on page 20).

Ductwork Preparation

Discharge Direction
The hood can be mounted on a wall or suspended from a
cabinet. Both vertical and horizontal discharge are possible
with either mounting method.
Ducting Recommendations
Proper performance is dependent upon proper ducting.
Local building codes may require the use of make-up air
systems when using ducted ventilation systems greater
than specified cubic feet per minute (CFM) of air
movement. The specified CFM varies from locale to locale.
It is the responsibility of the owner and the installer to
determine if additional requirements and/or standards
apply to specific installations.
Installation Instructions
®
hoods are suitable for
DO NOT USE FLEXIBLE DUCT; it creates back pressure/
air turbulence and reduces performance. Always use metal
ductwork.
Always install a metal vent cover where the ductwork exits
the house. Hood must be vented to the outside of
building only.
COLD WEATHER installations should have an additional
backdraft damper installed to minimize backward cold air
flow and a nonmetallic thermal break to minimize
conduction of outside temperatures as part of the ductwork.
The damper should be on the cold air side of the thermal
break. The break should be as close as possible to where
the ducting enters the heated portion of the house.
MAKE-UP AIR: Local building codes may require the use
of make-up air systems when using ducted ventilation
systems greater than specified CFM of air movement. The
specified CFM varies from locale to locale. It is the
responsibility of the owner and the installer to determine if
additional requirements and/or standards apply to specific
installations.
For safety reasons, ducting should vent directly outdoors
(not into an attic, underneath the house, into the garage or
into any enclosed space). The unit cannot be used in
conjunction with a recirculation unit.
®
THERMADOR recommends not exceeding 50 ft
(15.24 m) equivalent length of duct.
NOTE: The 25 ft. Blower Connector Cable accessory
(EXTNCB2) will only work for distances up to 25 ft. DO
NOT use more than one Blower Connector Cable per
installation.
Keep duct runs as short and straight as possible. Elbows
and transitions fittings reduce air flow efficiency. Back to
back elbows and "S" turns give very poor delivery and are
not recommended.
A short straight length of duct at the inlet of a remote
blower gives the best delivery.
Hoods are supplied with a 10" (254 mm) round transition. A
locally supplied transition is required for other sizes.
Use Table 2 on page 9 to compute permissible lengths for
duct runs to outdoors.
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