Addison UHA 150, Инструкция по установке, эксплуатации и обслуживанию

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SECTION 7: V
ENTING
13 of 49
Maximum Vent Len g ths Table
7.7 Vent Material
Vent material may b e single w all 26 ga. (minim u m)
galvanized steel or eq u al thickness stainless steel.
Completely seal all joints, refer to Page 11, Section
7.2 .
If penetrating a com bu sti b le w all or roof, a listed
thim b le w ith 2" (5 cm) clearance m u st b e u sed.
Where local codes permit, a single section of type
B-1 vent material may
b e u sed at the roof or w all
penetration instead of a thim b le. Ens u re vent
man u fact u rer's clearance from vent material is
maintained. Seal ann u lar space of the type B-1 vent
as w ell as all joints in the remaining vent.
7. 8 Replacin g an Existin g Heater in a Ventin g
System
When replacing an existing heater in a venting
system, the venting system may not
b e properly
sized to vent the ne w heater. The follo w ing steps
m u st b e follo w ed w ith each appliance connected to
the venting system placed in operation, w hile any
other appliances connected to the venting system
are not in operation.
1. Seal any u n u sed openings in the venting
system.
2. Inspect the venting system for proper size and
horizontal pitch, as req u ired b y the NFPA 54/
ANSI Z223.1 - latest revision, National F u el
Gas Code (US) or Standard CSA B149.1
Nat
u ral Gas and Propane Installation Code
(Canada) and these instr u ctions. Determine
that there is no b lockage or restriction, leakage,
corrosion and other deficiencies w hich co u ld
ca u se an u nsafe condition.
3. Close all bu ilding doors and w indo w s and all
doors b et w een the space in w hich the
appliance(s) connected to the venting system
are located and other spaces of the
bu ilding.
T u rn on clothes dryers and any exha u st fans,
s u ch as range hoods and b athroom exha u sts
so that they shall operate at maxim u m speed.
Do not operate a s u mmer exha u st fan. Close
fireplace dampers.
4. Follo w the lighting instr u ctions. Place the
appliance b eing inspected in operation. Adj u st
thermostat so that the appliance w ill operate
contin u o u sly.
5. For any appliance having a draft hood, test for
draft hood appliance spillage at the draft hood
relief opening after five min
u tes of main bu rner
operation. Use the flame of a match or candle.
6. After it has b een determined that each
appliance connected to the venting system
properly vents
w hen tested as o u tlined a b ove,
ret u rn doors, w indo w s, exha u st fans, fireplace
dampers and any other gas- bu rning appliances
to their previo u s conditions of u se.
7. If improper venting is o b served d u ring any of
the a b ove tests, the venting system m u st b e
corrected b y a contractor q u alified in the
installation and service of gas-fired eq u ipment
or yo u r local gas s u pplier. If the venting m u st b e
resized, u se appropriate ta b les in (US)
Appendix G of NFPA 54/ANSI Z223.1 - latest
revision, National F
u el Gas Code (US) or
Standard CSA B149.1 Nat u ral Gas and
Propane Installation Code (Canada) to
determine minim
u m size. All vent corrections
m u st b e in accordance w ith the appropriate
local codes and the NFPA 54/ANSI Z223.1 -
latest revision, National F
u el Gas Code (US) or
Standard CSA B149.1 Nat u ral Gas and
Propane Installation Code (Canada).
Fi g ure 6: Vent and Roof Detail
Model UHA[X][S]
150 - 400
# of Elbows
40 ft (12.2 m) 1
35 ft (10.7 m) 2
30 ft (9.1 m) 3
25 ft (7.6 m) 4
20 ft (6.1 m) 5