Bunn Coffee Maker C500 Installation Manual
RP/IS-A-C400/C500
Reduced Pressure
Zone Assemblies
Reduced Pressure
Detector Assemblies
Sizes: 21⁄2" – 10" (65 – 250mm)
• Installation
• Service
• Repair Kits
• Maintenance
For other repair kits and service parts,
send for Ames Repair Parts Price List,
PL-A-RP-BPD.
For technical assistance, contact your
local Ames representative.
IMPORTANT: Inquire with governing
authorities for local installation requirements.
NOTE: For Australia and New Zealand, line
strainers should be installed between the
upstream shutoff valve and the inlet of the
backflow preventer.
Colt
™
Series C400, C500
It’s important that this device be tested
periodically in compliance with local codes,
but at least once per year or more as service
conditions warrant. If installed on a fire
sprinkler system, all mechanical checks,
such as alarm checks and backflow
preventers, should be flow tested and
inspected internally in accordance with NFPA
13 and NFPA 25.
C400 OSY
Installation Note: Due to shipping, storage,
and general handling, the Victaulic Coupling
for the shutoff valves may have loosened
and should be retightened during installation.
Limited Warranty: Ames Fire & Waterworks (the “Company”) warrants each product to be free from defects in material and
workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within
the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH
RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY
SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty,
and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost
profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs
resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water
conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by
any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation
of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you
specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to
determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT
BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
www.amesfirewater.com
A Division of Watts Water Technologies, Inc.
2
Guidelines
1. Most field problems occur because dirt and debris present
in the system at the time of installation becomes trapped in
the #1 check. The system should be flushed before the
valve is installed. If the system is not flushed until after the
valve is installed, remove both check modules from the
valve and open the inlet shutoff to allow water to flow for a
sufficient time to flush debris from the water line. If debris in
the water system continues to cause fouling, a strainer can
be installed upstream of the backflow assembly.
2. The Series C400 and C500 may be installed in either
horizontal, “N” pattern, or “Z” pattern position as long as the
backflow assembly is installed in accordance with the direction of the flow arrow on the assembly and the local water
authority approves the installation.
3. The assembly should be installed with adequate clearance
around the valve to allow for inspection, testing and servicing.
12" (300mm) should be the minimum clearance between the
lower portion of the assembly and the floor or grade. The
valve should be protected from freezing.
4. Installing a backflow preventer in a pit or vault is not
recommended.
5. Normal discharge and nuisance spitting are accommodated
by the use of an Ames air gap fitting and a fabricated indirect
waste line. Floor drains of the same size must be provided in
case of excessive discharge.
6. The C400 and C500 backflow preventer should be tested by
a certified tester at the time of installation.
Note: Assembly body should not be painted.
Horizontal Installation
Basic Installation Instructions
Relief Valve Discharge Rates
2
1
⁄2" – 10" (65-250mm) C400 and C500
lpm gpm
1330 350
1140 300
950 250
760 200
570 150
380 100
190 50
00
0 20 40 60 80 psi
0 138 276 413 551 kPa
Rate of Flow
Pressure
3
Prior to servicing any Ames valve, it is mandatory to
shut down the water system by closing both the inlet
and outlet shutoff valves. After shutoff valves are closed,
open test cock #2, #3 and #4 to relieve pressure within
the backflow assembly.
1. After #3 test cock has been opened to relieve pressure,
remove #3 test cock from housing. (Figure A)
2. Insert a #3 screwdriver through the hole on the top of the
cover sleeve and using both hands rotate the cover sleeve
approximately
1
/4-turn clockwise and 1/4-turn counter-clockwise to break the sleeve O-ring seals. Using the screwdriver,
slowly slide the cover sleeve to the downstream side of the
housing. (Figure B)
3. Remove the stainless steel check retainer from the housing.
(Figure B)
4. Remove the #1 check module (Figure C) by inserting two
flat blade screwdrivers into the slots on either side of the
check module and gently pry the check module toward
the open zone.
5. Remove #2 check module with the same instructions as
in #4 above. For servicing 6" (150mm) checks see 8" – 10"
(200 – 250mm) instructions on p.4.
6. To clean or inspect either check module, insert a #3 screwdriver through the downstream side of the check module
as shown in Figures D and E. When the screwdriver is in
place, remove the E-clip (Figure F) and pin connecting the
structural members and the check clapper will open with
no tension.
7. Thoroughly clean the seating area. The sealing disc may be
removed, if necessary, by removing the screws connecting
the keeper plate to the clapper. The sealing disc may be
reversed and reinstalled if the elastomer is cut or damaged.
8. Wash check module and O-ring and inspect for any
damage. If damaged, reinstall new parts.
9. After thorough cleaning, lubricate O-ring w/FDA approved
lubricant, replace pin and E-clip in structural members,
remove screw driver, reinstall check modules and
assemble housing in reverse order of these instructions.
Figure D
Figure E
Figure F
Figure A
Figure B
Figure C
Figure D
Figure E
Figure F
#1 Check Diagrams
#2 Check Diagrams
Maintenance Instructions 21/2" – 6" (65 – 150mm)
Instructions
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