IBC VFC 15-150, Инструкция по установке и эксплуатации

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4-3
MAINTENANCE
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS
4.1.12 Boiler Treatment
•
Check consistency of any boiler treatment used (e.g. Furnox™), for
appropriate mixture. Chemical inhibitors are consumed over time, lowering
their density.
•
Verify proper operation after servicing.
4.1.13 Relief Valve - Maintenance and Testing
The relief valve manufacturer requires that under normal operating conditions
a “try lever test” must be performed every two months. Under severe service
conditions, or if corrosion and/or deposits are noticed within the valve body,
testing must be performed more often. A “try lever test” must also be performed
at the end of any non-service period.
Test at or near maximum operating pressure by holding the test lever fully open
for at least 5 seconds to flush the valve seat free of sediment and debris. Then
release the lever and permit the valve to snap shut.
If the lever does not activate, or there is not evidence of discharge, discontinue
use of equipment immediately and contact a licensed contractor or qualified
service personnel.
If the relief valve does not completely seal, and fluid continues to leak from the
discharge pipe - perform the test again to try and flush any debris that may be
lodged in the valve. If repeated tries fail to stop the leakage, contact a licensed
contractor or qualified service personnel to replace the valve.
While performing a “try lever test”, a quantity of heat transfer fluid will be
discharged from the piping system and the system pressure will drop. This fluid
must be replaced. It is highly recommended that a system pressurization unit,
such as an Axiom Industries model MF200 be employed to refill and pressurize
your system. Capture the discharged fluid in a container and recycle it by
returning it to the system feeder unit. This is particularly important when your
system contains treatment chemicals or glycol solutions. If the system employs
plain water, the boiler auto fill valve must be turned on in order to recharge the
lost fluid.
CAUTION
Installers should inquire of
local water purveyors as to
the suitability of their supply
for use in hydronic heating
systems. If water quality is
questionable, a local water
treatment expert must
be consulted for testing,
assessment and, if required,
treatment. Alternatively, water
or hydronic fluid of known
quality can be brought to the
site.
CAUTION
Before testing the relief valve,
make certain the discharge
pipe is properly connected to
the valve outlet and arranged to
contain and safely dispose of
equipment discharge.
WARNING
Do not use automotive-type
ethylene or other types of
automotive glycol antifreeze,
or undiluted antifreeze of
any kind. This may result in
severe boiler damage. It is the
responsibility of the Installer to
ensure that glycol solutions are
formulated to inhibit corrosion
in hydronic heating systems
of mixed materials. Improper
mixtures and chemical
additives may cause damage
to ferrous and non-ferrous
components as well as non-
metallic, wetted components,
normally found in hydronic
systems. Ethylene glycol is
toxic, and may be prohibited
for use by codes applicable
to your installation location.
For environmental and toxicity
reasons, IBC recommends
only using non-toxic propylene
glycol.