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!
Model 62
Vacuum Breaker
Hoffman Specialty
Installation & Maintenance
Instructions
HS-902(C)
CAUTION
• Before using this product read and understand instructions.
• Save these instructions for future reference.
• Turn off steam or water before servicing.
• To prevent serious burns, wear heat resistant gloves when handling hot equipment.
Failure to follow this caution could result in property damage or personal injury.
OPERATION
As system pressure falls sufficiently below atmospheric pressure to
compress the spring, the vacuum breaker will open, allowing air to
enter the system. The vacuum breaker is factory set to open at
approximately 2 inches Hg vacuum. It is adjustable from 1/4” to 20”
(8 - 508 mm) Hg vacuum.
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Temperature
Regulator
Hot Water
Converter
Y
Strainer
F & T
Trap
F & T
Trap
Y Strainer
Y Strainer
Steam
Supply
Cold
Water Supply
Drain
Vacuum Breaker
Thermo
Bulb
Storage Tank
Water Heater
F & T
Trap
Temperature
Regulator
Y
Strainer
Vacuum Breaker
Temperature
Regulator
Vacuum
Breaker
Tankless
Water Heater
Y
Strainer
F & T
Trap
INSTALLATION –
STEP 1 - Determine Where to Install the Vacuum Breaker
TYPICAL PIPING DIAGRAMS
The Model 62 vacuum breaker can be installed
vertically or horizontally. However, installing the
vacuum breaker horizontally results in fouling of
the seating surface, which prevents tight sealing.
The life of the o-ring may be increased by
installing the vacuum breaker in a standpipe
where temperatures are lower.
Adjusting the Set Point
To increase the vacuum breaker set point,
increase the spr
ing tension. To decrease the
vacuum breaker set point, decrease the spring
tension.
Hot Water Converter
Storage Tank Water Heater
2
Tankless Water Heater
INSTALLATION COMPLETE
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MAINTENANCE
!
F
B
E
D
G
C
A
SCHEDULE:
• Initially and every 6 months thereafter.
• Replace vacuum breaker every 15 years.
More frequent replacement of the vacuum breaker
is required when used on w
locales where significant water treatment is
required, or where more frequent cleaning is
necessary.
ater systems in
PROCEDURE:
CAUTION
• Turn off steam or water before servicing
vacuum breaker.
• To prevent serious burns, wear heat resistant
gloves when handling hot equipment.
Failure to follow this caution could cause
personal injury.
1. Inspect for leaks. Stop all leaks by tightening or
replacing O-Ring, as necessary.
O-Ring Replacement (Part Number 601313)
1. Make sure the steam, air or water supply is turned off
and pressure is relieved. On steam systems, allow
unit sufficient time to cool.
2. Remove complete vacuum breaker from system.
3. Pull cover (A) from base (B), this is a snap in place
cover that can be removed by hand.
4. Measure and note distance from end of stem (C) to
top locknut (D). Remove locknuts (D) and (G),
spring (E), and stem (C) from base (B).
5. Remove O-Ring (F) from stem (C) and discard.
Clean all parts, apply silicone lubricant to new O-Ring
and push into the shoulder of the stem, Make sure
the O-Ring is flat with the end of the stem.
6. Reassemble all parts. Tighten locknuts (D) and (G) to
the same distance as measured in step 4 (above).
Push on the stem several times to make sure it is free
to move in its guide and snap cover in place on base.
7. Reinstall on system and check for leaks.
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ITT
8200 N. Austin Ave.
Morton Grove, IL 60053
tel: 847-966-3700
fax: 847-966-9052
www
.hoffmanspecialty.com
Printed in U.S.A. 9-06 510320
©2006 ITT Corporation
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