Designs, materials, weights and performance ratings
are approximate and subject to change without notice.
Visit
armstrong
international.com for up-to-date information.
Armstrong
International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Tel. (269) 279-3602 Fax. (269) 279-3130
Page 8 of 44
Precautions
WARNING! The design of the Digital-Flo
®
electrical system is NOT suitable for installation
in interior spaces classified as “hazardous locations”, i.e., spaces containing explosive
and combustible vapors or dusts, as defined in the National Electrical Code, NEC.
WARNING! Always use appropriate lockout-tagout procedures when turning off and
disconnecting power sources during installation, service, and repair. Failure to follow
safety precautions may result in property damage, shock causing personal injury, or even
electrocution and death.
WARNING! Always use appropriate personal protective equipment (PPE) when working
with high-voltage electricity.
WARNING! Water conducts electricity. DO NOT stand in water or touch wet surfaces while
working with “live” electrical equipment.
WARNING! The factory-supplied, pressure relief valve is a required safety device.
• DO NOT remove the relief valve from the heater
• DO NOT plug the open end of the relief valve
• DO NOT install any valve(s) or restrictions in the pressure relief valve, drain line
CAUTION! The requirements of all applicable local and regional equipment installation
codes supersede the installation instructions in this manual. Governing codes must be
followed. In the absence of these codes, installation shall conform to these instructions
and the guidelines contained in the latest edition of the National Electrical Code (NEC),
NFPA 70.
CAUTION! For long & satisfactory service, Armstrong recommends the facility use, or
install, effective electrical surge and lightning protection to protect this equipment.
Water Treatment Requirements:
The end user shall be responsible for providing effective water treatment systems suitable to the application. The
heater design does not incorporate a water quality control system.
Since the Digital-Flo
®
design incorporates a steam-to-water, shell & tube type, heat exchanger, minimizing scaling and
deposit formation on heat exchange surfaces is critical to maintaining satisfactory operation. Therefore, consistent
control of system water quality could be a very important factor in maintaining the water heating performance of
the Digital-Flo
®
. Under certain conditions (e.g., water with a high dissolved mineral content or high discharge water
temperatures), scale build-up in the heater and associated plumbing may be rapid & excessive causing heater
performance to deteriorate to a noticeable level. Periodic cleaning and descaling may be required under these conditions.
Only designated, qualified and competent personnel shall conduct product installation in
accordance with these instructions.
Содержание Digital-Flo DF41540
Страница 45: ...Notes...
