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Description

Bell & Gossett Series CRS Coalescing Removal Separators are designed to eliminate entrained air and separate debris 

associated with start-up and maintenance of any hydronic system. The design incorporates an optional removable end 

cover for coalescing medium access, and an optional air vent to automatically release air from the separator.

The design and construction conforms to ASME Section VIII, Div.1. This product is intended for hot and chilled water 

systems.

Installation

A.  PRE-INSTALLATION

1. Visually inspect Series CRS separator and check 

for damage prior to installation.

Separator 

Temperature 

Max Working Pressure

CRS

-20°F (-29°C) to 450°F (232°C) 

125 PSI (862 kPa)

Operational Limits

WARNING: Explosion or Rupture Hazard. A relief valve must be installed to prevent pressure in excess of local 

code requirement or maximum working pressure designated in the Product Manual, whichever is less. Do not 

expose Series CRS Coalescing Removal Separator to freezing temperatures or temperatures in excess of 450°F. 

Failure to properly size the Product or follow these instructions may result in excessive strain on the system 

and may lead to Product failure, serious or fatal personal injury, leakage, and/or property damage.

WARNING: Read carefully the product installation, operating and maintenance instructions. Failure to follow 

the instructions and warnings in the manual may result in serious or fatal injury and/or property damage, and 

will void the product warranty. This product must be installed by a qualified professional. Follow all applicable 

local and state codes and regulations, in the absence of such codes, follow the current editions of the National 

Plumbing Code and National Electric Code, as applicable.

WARNING: : This product, like most products under pressure, may over time corrode, weaken and burst or 

explode, causing serious or fatal personal injury, leaking or flooding and/or property damage. To minimize risk, 

a licensed professional must install and periodically inspect and service the Product. A drip pan connected to 

an adequate drain must be installed if leaking or flooding could cause property damage. Do not locate in an 

area where leaking could cause property damage.

WARNING: If the separator is damaged, 

it must be replaced. Failure to follow this 

instruction may result in serious personal 

injury or death and property 

damage.

2. In order to protect the Series CRS separator 

from shipping damage, some components are 

shipped unattached and in a protective box. These 

components are to be added to the Series CRS 

separator on site. See Figure 1.

fig. 1

Summary of Contents for CRS Series

Page 1: ...Y IS INVOLVED FAILURE TO FOLLOW THE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD Safety Message Level DANGER WARNING CAUTION ELECTRICAL HAZARD NOTICE Indication A hazardous situation which if not avoided will result in death or serious injury A hazardous situation which if not avoided will result in death or serious injury A hazardous situation which if not avoided will result in major or minor inju...

Page 2: ...al injury leakage and or property damage WARNING Read carefully the product installation operating and maintenance instructions Failure to follow the instructions and warnings in the manual may result in serious or fatal injury and or property damage and will void the product warranty This product must be installed by a qualified professional Follow all applicable local and state codes and regulat...

Page 3: ...N Installation and maintenance must be performed by a qualified professional Service should not be performed on any component in an active hydronic loop Before attempting to make any required adjust ments properly isolate and drain the branch loops that require service and allow the valves to reach a safe handling temperature and zero pressure condition Use proper safety equipment including gloves...

Page 4: ...ntinuous air removal In case the piping arrangement does not permit the installation of a single separator on the main additional separators should be installed on each loop or zone In this event only one expansion tank is required for the system Even with a No 98 air vent installed on the separator it is recommended that additional Bell Gossett air vents be installed on high points in the system ...

Page 5: ...rnal leakage or corrosion If found the tank must be replaced Failure to follow these instructions may result in serious personal injury or death and property damage 1 The system water contains air bubbles entrained air and dirt particles 2 Large air bubbles quickly rise to the top of the vessel and into the vent Micro bubbles coalesce and form larger bubbles Entrained air is pulled out of solution...

Page 6: ... medium and reinstall in the Series CRS separator Replace the cover head gasket with a new one and reinstall the cover making sure that the flange bolts are tightened The bolts should be torqued incrementally to 30 60 and then to 100 of the appropriate value shown on the table on the next page The bolts should be torqued in the sequential order of the appropriate pattern shown in Figure 4 WARNING ...

Page 7: ...valve and the component to dry Note If the component or valve appears to have been damaged replace it 3 Starting with the second thread of the NPT male component apply a 360 bead of Loctite 567 thread sealant lubricant as shown below Follow Loctite handling precautions as noted on the product labeling 4 If Loctite 567 is unavailable recommends RectorSeal No 5 pipe thread sealant for all non glycol...

Page 8: ...r maximum pressure resistance allow the Loctite 567 or RectorSeal No 5 thread sealant to cure for 24 hours PTFE tape typically does not require curing to achieve maximum pressure resistance Loctite and Loctite 567 are registered trademarks of Henkel AG Co RectorSeal No 5 is a registered trademark of RectorSeal Corporation NOTICE Over application of torque may cause damage to the Separator or acces...

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