Tyco Fire Product CB800 Installation Instructions Manual

Grinnell Mechanical Products

Marking

Fine Setting Scale

Display Display

Model CB800
Circuit Balancing Valve

Installation
Instructions

GRINNELL CB800 Circuit Balancing
Valves are designed for installation in
hot water heating and chilled water
air conditioning systems and serve to
achieve a hydronic balance between
the various circuits of the system.

These installation instructions are
designed for the Grooved, Flanged,
Threaded, and Soldered type Circuit
Balancing Valves.

General Instructions

Always read and understand the in­structions. Never remove any piping
component without verifying that the
system is depressurized and drained.

It is the designer’s responsibility to se­lect products suitable for the intend­ed service and to ensure that pressure
ratings and performance data are not
exceeded.

It is recommended that the valve be
installed in the return line.

Install the valve with the flow in the
same direction as the arrow cast in
the body.

Valve must be installed with a mini­mum of 3D (3 x nominal pipe diam­eter) of straight pipe in the upstream
side.

Valve may be installed in the vertical
or horizontal position, with the hand­wheel up, down or on the side.

Presetting:

The required preset value can be ob­tained by referencing the flow chart
for the appropriate size of valve. (See
reference documents on www.grin­nell.com) Following the steps below,
adjust the basic and fine adjustment
scale on the handwheel to match the
selected presetting.

Step 1. The preset value of the valve
is adjusted with the handwheel (See
Figure 1 or 2).

Step 2. Turn the handwheel so that
the arrow on the sliding indicator
matches the basic adjustment value.

Sliding
Indicator

Basic Setting Scale
(Longitudinal Scale)

One complete turn of the handwheel
adjusts the indicator one full position.

The fine setting is displayed in the
scale under the handwheel and in­dicates 1/10th of a turn of the
handwheel.

Step 3. With the valve open to the
preset value, use a small screwdriver
and gently pry the cover plug out of
the hand-wheel. Using a 3 mm Allen
key for the 1/2 to 2 inch, 4 mm Allen
key for the 2-1/2 to 6 inch, or a 10 mm
screwdriver for the 8 to 12 inch, insert
the tool into the screw (see Figure 1 or

2) and turn clockwise until tight. This
will lock the hand-wheel so that the
valve can not be opened beyond the
preset value. The hand-wheel may still
be turned to the closed position. Re­place the cover plug.

Repositioning the
Handwheel

Depending on the position of the valve
in the system, it may be desirable to
move the 1/2 inch to 6 inch handwheel
and adjustment scales to make it eas­ier to read.

Step 1. Ensure the valve is closed
and the adjustment scale is set at 0.

Step 2. Use a small screwdriver and
gently pry the cover plug out of the
hand-wheel.

Step 3. Use a 12 mm socket for the
1/2 inch to 2 inch handwheel and
6 mm Allen key for the 2-1/2 inch to 6
inch handwheel to remove the Allen
screw (See Figure 1).

Worldwide

Contacts

(Peripheral Scale)

Handwheel

Screw

Hole For
Sealing Wire

1/2 inch to 6 inch

handwheel Presetting and rePositioning

Cover Plug

Hole For
Sealing Wire

Figure 1

1/10th of a turn

handwheel Presetting

www.grinnell.com

Allen Wrench

complete turns

Lead

seal

8 inch to 12 inch

and rePositioning

Cover

plug

Figure 2

Handwheel

Handwheel

Page 1 of 2 AUGUST 2012 G988

Page 2 of 2 G988

Guide

Step 4. Gently pull the handwheel up
and remove it from the valve spindle.

Step 5. Reposition the handwheel
so that the adjustment scale is visible
and slide the handwheel down on the
spindle.

Step 6. Replace the screw and
tighten.

Step 7. Replace the cover plug.

Protecting the Setting

A sealing wire may be threaded
through the hole in the handwheel
(See Figure 2 or 3) and the lead seal
to be fixed to prevent tampering of the
setting.

Locking the Handwheel

Locking 1/2 Inch to 6 Inch
Handwheel

The hand wheel can be locked in any
position. Slide the enclosed clip into
the cut-out in the hand wheel between
the guides (See Figure 3), making sure
it locates into the sliding indicator. At­tach the lead seal wire through the
hole in the clip then through the hole in
the side of the hand wheel. Ensure the
sealing wire is fitted tightly, then crimp
the seal.

Reference
Documents

For more details, refer to the Instruc­tion Handbook IH-4500 and Technical
Data Sheet G450.

Lead

Clip

Protecting and locking

Locking 8 Inch to 14 Inch
Handwheel

The handwheel can be locked in any
position (1/10th of a turn) by removing
the existing cover plug and replacing
it with a special one. The sealing wire
is fitted through the hole in the hand­wheel and a Lead Seal is fitted (See
Figure 2).

NOTICE

For presetting and fine adjustment
of the flow volume, use the Grinnell
Model MC2 flow computing hand held
Differential Measuring Computer.

Copyright © 2012 Tyco Fire Products, LP. All rights reserved.

Figure 3

the handwheel

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