System Balancing; Automatic Balancing Valves; Pre-Installation System Cleaning - Hussmann REACH-IN Installation & Operation Manual

Hussmann recommends using DOWFROST™ inhibited propylene glycol.
Pre-diluted solutions (35% inhibited propylene glycol) of DOWFROST™
are available from Dow. The ingredients in DOWFROST™ have been
approved by the FDA and are listed as chemically acceptable by USDA.
The Dow Chemical Company
Midland, MI 48674
1-800-447-4369
www.dow.com
Requirements on system fluid:
Pre-mixed 35% inhibited propylene glycol
Typical Fluid Properties
Solution Composition is 35% inhibited propylene glycol by weight
pH of Solution 8.0 – 10.0
Specific Gravity (at 60°F) 1.033
Viscosity (at 20°F) 14.2 cP
Boiling Point of Solution 217°F
Freezing Point of Solution 2°F
Refractive Index (at 72°F) 1.3733

SYSTEM BALANCING

Balancing may be required to provide adequate coolant flow to each
circuit in order to maintain the required waterflow. Balancing is
achieved through the setting of balance valves located throughout the
system piping.
The installation contractor must consult and be familiar with the
manufacturer's Material Safety Data Sheets (MSDS) before handling
any secondary fluid. The MSDS contains proper disposal and safety
methods.
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
Providing Information About Safety Messages in Collateral Mate

AUTOMATIC BALANCING VALVES

Case may be equipped with automatic balancing valves. The case will
maintain the correct flow rate. The cooling system pressure must be
between 5 to 30 psid for proper operation of the automatic balancing
A1 Explanation of Signal Words and Symbols
valves. Water flow data is provided in the MDS case data sheets,
Signal words and safety symbols that are used in a product's collateral materials or
including required flowrate, pressure drop, and heat of rejection.
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The
be used for this purpose.

PRE-INSTALLATION SYSTEM CLEANING

Dow recommends the new piping system be cleaned using a 1-2%
solution of trisodium phosphate (TSP), or equivalent cleaner and
distilled or deionized water to remove grease, mill scale, or other
residues from construction.
Repeat this process if necessary until the drained solution is clear
A1.2 Signal Words
and free from visible debris. The system should then be drained and
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI
may be explained in collateral materials. The following artwork may be used for this
flushed again using distilled or deionized water.
Hussmann only recommends distilled or deionized water for system
flushing with 2% TSP. Dry nitrogen can be used for the initial pressure
test, (60 to 75 psi), hold for three hours.
Use only distilled or de-ionized water for
flushing with 2 percent TSP. Use a pre-mixed
inhibited glycol solution. If the mixing is to be
done on site, use only distilled or de-ionized
A1.3 Other Highlighting Conventions
water. Do not use tap water.
The meaning of any other highlighting conventions used to differentiate safety mess
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials ma
collateral materials.
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Provided by IHS Markit under license with NEMA
No reproduction or networking permitted without license from IHS
2-8
Annex A
Safety Signs and Labels
(Informative)
This is the safety alert symbol. It is used
to potential physical injury hazards. Obe
messages that follow this symbol to avo
injury or death.
DANGER indicates a hazardous situation
avoided, will result in death or seriou
WARNING indicates a hazardous situatio
avoided, could result in death or seri
CAUTION indicates a hazardous situatio
avoided, could result in minor or mod
NOTICE is used to address practices no
physical injury.
Safety instructions (or equivalent) signs i
safety-related instructions or procedu
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Not for Resale, 02/16/2021 11:49:55 MST