Roberts Gorden UHA[X][S] 125 Manuale Utente

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SECTION 6: V
ENTING
15
Vents and air intakes must be adequately 
supported so that the heater does not bear the 
weight of the pipes.
For vent termination See Page 17, Figure 9 through 
Page 20, Figure 14
.
6.3.1 Standard Vented Heaters 
 
         (Models UHA[X] 30 - 125)
The vent must be fitted with a low resistance 
terminal. See Page 17, Figure 9 through Page 17, 
Figure 10
.
 Standard vented heaters do not allow 
outdoor air intake for combustion air.
 
6.3.2 Separated Combustion Heaters 
 
         (Models UHA[X]S 30 - 125)
The heaters are designed to be installed as 
separated combustion heaters. The vent and air 
intake are run as separate pipes to the wall or roof 
terminals. See Page 19, Figure 12As an option, the 
vent and air intake are run as separate pipes to a 
concentric vent box and a concentric vent/air intake 
pipe penetrates the wall or roof. See Page 19, 
Figure 13
 
and Page 20, Figure 14.
For seperated combustion installation, the vent and 
air intake must be fitted with an individual and 
correctly sized sealed system and the vent and air 
intake must terminate at approved wall and roof 
terminals.
Seperated combustion units may not be common 
vented. See Page 14, Section 6
6.4 Unvented Operation
The heater must be vented when installed in 
residential buildings.
For unvented operation in commercial installations, 
sufficient ventilation must be provided in the amount 
of 4 cfm per 1000 Btu/h firing rate (United States); 3 
cfm per 1000 Btu/h firing rate (Canada).
 
WARNING: Combustion by-products contain a 
chemical known to the State of California to cause 
cancer and birth defects or other reproductive harm.
6.5 Horizontal Venting
Horizontally vented heaters must be individually 
vented.
Vent pipe must be sloped ¼" (.6 cm) for every 1' (.3 
m).  For vent lengths greater than 5' (1.5 m), 
condensation will form. Insulation is recommended 
and condensation drains may be desired.   
In noncombustible walls only, vent terminal 
 
(P/N 02537801-1P) may be used.
For 4'' (10 cm) vents in either combustible or 
noncombustible walls, use vent terminal (P/N 
90502100) or equivalent insulated vent terminal. 
Follow the manufacturer's instructions for proper 
installation.
Instead of an insulated vent terminal, a listed thimble 
(with 2" (5 cm) air gap) may be used with a 4" (10 
cm) vent cap (P/N 90502102).
In the State of Massachusetts, the following 
regulations apply to horizontally-vented heaters 
certified for installation in structures used in whole or 
in part for residential purposes (UHA 30-75 only) 
and where the side wall exhaust vent termination is 
less than seven (7) feet above finished grade in the 
area of the venting, including but not limited to decks 
and porches:
Installation of Carbon Monoxide Detectors: At the 
time of installation of the side wall horizontal vented 
gas fueled equipment, the installing plumber or 
gasfitter shall observe that a hard wired carbon 
monoxide detector with an alarm and battery back-
up is installed on the floor level where the gas 
equipment is to be installed. In addition, the 
installing plumber or gasfitter shall observe that a 
battery operated or hard wired carbon monoxide 
detector with an alarm is installed on each additional 
level of the dwelling, building or structure served by 
the side wall horizontal vented gas fueled 
equipment. It shall be the responsibility of the 
property owner to secure the services of qualified 
licensed professionals for the installation of hard 
wired carbon monoxide detectors 
•    In the event that the side wall horizontally 
vented gas fueled equipment is installed in a 
crawl space or an attic, the hard wired carbon 
monoxide detector with alarm and battery back-
up may be installed on the next adjacent floor 
level. 
WARNING
Carbon Monoxide Hazard
Heaters may be installed 
vented or unvented.
Vented heaters must be 
vented outdoors.
Unvented heaters must be 
installed in buildings with 
ventilation rates as per 
section 6.4.
Failure to follow these 
instructions can result in 
death or injury.