Roberts Gorden Combat UHD-Series, Installation, Operation & Service Manual

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UHD S
TANDARD
D
UCT
F
URNACE
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
12 of 57
SECTION 7: VENTING
7.1 Ventin g
This heater m u st be vented in accordance w ith the
r u les contained in this man u al and w ith the follo w ing
national codes and any state, provincial or local
codes
w hich may apply: United States: Refer to
NFPA 54/ANSI Z223.1 - latest revision, National
F
u el Gas Code; Canada: Refer to CSA B149.1
Nat u ral Gas and Propane Installation Code.
Any portion of vent pipe passing thro u gh a
comb u stible w all m u st have a listed thimble to
conform w ith the above codes.
The bottom of the vent or air intake terminal shall not
be located less than 1' (.3 m) above grade level.
The vent shall not terminate less than 7' (2.1 m)
above grade
w here located adjacent to p u blic
w alk w ays.
V ent terminal m u st be installed at a height s u fficient
to prevent blockage by sno w and b u ilding materials
protected from degradation by fl u e gasses.
V ent terminal m u st be beyond any comb u stible
overhang.
Sec u re all joints w ith corrosion resistant #8 x 3/8"
sheet metal scre w s.
For single w all venting, press u re sensitive al u min u m
tape or silicone sealant m u st be u sed to seal all
joints.
Al u min u m tape shall have a minim u m temperat u re
rating of 400° F (204° C) and meet SMACNA AFTS-
100-73 standards. High temperat
u re silicone sealant
m u st have a minim u m temperat u re rating of 480° F
(250° C).
7.1.1 United States Re q uirements
V ent m u st terminate at least 3' (.9 m) above any
forced air inlet located w ithin 10' (3.1 m).
V ent m u st terminate at least 4' (1.2 m) belo w ,
4' (1.2 m) horizontally from, or 1' (.3 m) above any
door, operable
w indo w , or gravity air inlet into any
b u ilding.
NFPA 54/ANSI Z223.1 - latest revision, National
F
u el Gas Code specifies a 4' (1.2 m) horizontal vent
terminal clearance from gas and electric meters,
reg
u lators and relief eq u ipment.
7.1.2 Canadian Re q uirements
The vent shall not terminate w ithin 6' (1.8 m) of a
mechanical air s u pply inlet to any b u ilding.
The vent shall not terminate w ithin 3' (.9 m) of a
w indo w or door that can be opened in any b u ilding,
any non-mechanical air s u pply inlet to any b u ilding,
or of the comb u stion air inlet of any other appliance.
7.2 Vent Installation
Maintain clearances to comb u stibles at all times for
safety. Clearances are the req u ired distances that
comb u stible objects m u st be a w ay from the heater
to prevent serio u s fire hazard. See Page 7, Section
4 . For vented u nits, the vent m u st terminate o u tside
of the b u ilding.
V ents m u st be f u lly sealed and correctly sized for
the model. If the vent passes thro u gh a w all or
ceiling of comb u stible material, it m u st be enclosed
by a listed thimble and be separated from the
thimble by at least a 2" (5 cm) air gap.
For separated comb u stion models, vents and air
intakes m u st be a f u lly sealed system and correctly
sized for the model. V ent sho u ld be assembled as
detailed on Page 13, Figure 7 through Page 17,
Figure 12 .
The joints bet w een the vent terminal and the roof or
w all m u st be properly sealed.
Vents and air intakes must be ade q uately
supported so that the heater does not bear the
wei
g ht of the pipes.
For vent termination See Page 13, Figure 7 through
Page 17, Figure 12 .
7.2.1 Standard Vented Heaters
(Models UHD[T][X][R] 150 - 250 and Models
UHD[X][R] 300 - 400)
The vent m u st be fitted w ith a lo w resistance
terminal. See Page 13, Figure 7 through Page 15,
Figure 9 . Standard vented heaters do not allo w
o u tdoor air intake for comb u stion air.
7.2.2 Separated Combustion Heaters
(Models UHD[T][X]S[R] 150 - 250 and Models
UHD[X]S[R] 300 - 400)
The heaters are designed to be installed as
separated comb
u stion heaters. The vent and air
intake are r u n as separate pipes to the w all or roof
WARNING
Carbon Monoxide Hazard
Heaters must be vented
outdoors.
Heaters must be installed
according to the
installation manual.
Failure to follow these
instructions can result in
death or injury.