A.O. Smith VB/VW 1500, 2000, Инструкция по эксплуатации

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The Discharge Pipe:
• Should not be smaller in size than the outlet pipe size of the
valve, or have any reducing couplings or other restrictions.
• Should not be plugged or blocked.
• Should not be exposed to freezing temperatures.
• Should be of material listed for hot water distribution.
• Should be installed so as to allow complete drainage of both
the relief valve and the discharge pipe.
• Must terminate a maximum of six inches above a floor drain
or external to building. In cold climates, it is recommended that
discharge pipe be terminated at an adequate drain inside building.
• Should not have any valve or other obstruction between the
relief valve and the drain.
Once the boiler is installed and filled with water and the system is
pressurized, manually test the operation of the pressure relief valve.
See the maintenance section of this manual for instructions.
Your local code authority may have other specific safety relief
valve requirements not covered below. If any pressure relief valve
is re placed, the replace ment valve must com ply with the current
version of the ASME Boiler and Pressure Vessel Code, Section
IV (“HEATING BOILERS”).
VW HOT WATER SUPPLY BOILERS, are shipped with a 125 psi
(860kPa) pressure relief valve that must be in stalled in the water
out let as near to the boil er as possi ble.
This ASME-rated valve has a discharge capacity that exceeds maximum
boiler input rating and a pres sure rating that does not exceed maxi-
mum working pres sure shown on boiler rating plate. In addition, a CSA
design-certified and ASME-rated tempera ture and pressure (T&P) relief
valve must be installed on each and every water storage tank in hot
water supply system. The T&P relief valve must comply with appli cable
construction provisions of Standard for Relief Valves for Hot Water
Supply Systems, ANSI Z21.22 or CSA 4.4. T&P re lief valve must be
of automatic reset type and not embody a single-use type fusible plug,
cartridge or linkage.
T&P relief valve should have a temperature rating of 210°F (99°C),
a pressure rating not exceeding lowest rated working pressure of
any system compo nent, and a discharge capacity exceeding total
input of water boilers supply ing water to storage tank.
Locate the T&P relief valve (a) in the top of the tank, or (b) in the side of
the tank on a centerline within the upper 6 inches (152mm) of the top
of the tank, see Figures 13 and 14. The tapping should be threaded in
accordance with the current edition of the Standard for Pipe Threads,
General Purpose (inch), ANSI/A SME B1.20.1. The location of, or in-
tended location for, the T&P relief valve should be readily accessible for
servicing or replacement.
VB HOT WATER HEATING BOILERS,
are shipped with a 50 psi
(345kPa) pressure relief valve. This relief valve must be in stalled
in the water outlet as near to the boiler as possi ble.
GENERAL
REQUIRED ABILITY
INSTALLATION OR SERVICE OF THIS BOILER REQUIRES
ABILITY EQUIVALENT TO THAT OF A LICENSED TRADES MAN
IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING,
GAS SUPPLY, AND ELECTRICAL WORK ARE RE QUIRED.
LOCATION
When installing the boiler, consideration must be given to proper
location. The location selected should provide ade quate air supply
and be as centralized with the piping system as possible.
This boiler is intended for Indoor Installation only, and should not
be installed where freezing temperatures or any moisture could
damage the external components of the boiler.
REPLACING EXISTING COMMON VENTED BOILER
At the time of removal of an existing boiler, the following steps
should be followed with each appliance remaining connected to
the common venting system placed in operation, while the other
appliances remaining connected to the common venting system
are not in operation.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion and other deficiencies which
could cause an unsafe condition.