Dover unified brands groen DH-20, Operator'S Manual

Page: 11 / 30

11 OM-DH(T) DOMESTIC & (CE) INTERNATIONAL
a. is connected from the valve outlet with no intervening valve and directed
downward to a safe point of discharge.
b. allows complete drainage of both the valve and the discharge line
c. is independently supported and securely anchored so as to avoid applied
stress on the valve.
d. is as short and straight as possible.
e. terminates freely to atmosphere where any discharge will be clearly
visible and is at no risk of freezing.
f. terminates with a plain end that is not threaded.
g. is constructed of a material suitable for exposure to temperatures of
375ºF or greater.
h. is, over its entire length, of a size equal to or greater than the valve
outlet.
Use only schedule 40 pipe for discharge. (Do not use schedule 80, extra strong
pipe or connections). DO NOT CAP, PLUG, OR OTHERWISE OBSTRUCT DISCHARGE
PIPE OUTLET!
9. See appropriate ASME Boiler and Pressure Vessel Code for additional
installation instructions.
CONVERSION
ALL CONVERSIONS MUST BE FOR APPROVED GAS IN THE COUNTRIES LISTED IN THIS MANUAL.
IMPORTANT: THIS APPLIANCE WAS FITTED AT THE FACTORY WITH GAS INJECTORS FOR
TYPE OF GAS SPECIFIED ON DATA PLATE. PRIOR TO INSTALLING EQUIPMENT,
OR WHEN CONVERTING TO ANOTHER GAS, VERIFY THAT THE INJECTOR SIZE
MARKING ON THE GAS INJECTOR MATCHES THE INFORMATION ON THE
DATA PLATE FOR THE TYPE OF GAS BEING USED.
See previous content for important information for gas conversion. Verify the
type of gas to be used. To change the type of gas used (e.g. G20 to G31, natural
gas to propane, or inverse) change the following:
1. Burner injectors. See instruction in this manual.
2. Gas valve spring. Install per instructions supplied with the spring package as
shown below.
3. Pilot orifice. The pilot orifice for correct gas must be used. See photo below.
a. Remove the gas line and the connector to the pilot.
b. Remove natural gas/G20 orifice from the pilot. It is marked BCR18.
c. Insert propane/G31 orifice marked BBR14.
d. Reconnect pilot gas line.
4. Data plate with correct rate and gas manifold pressure information.
OM-SM-DH-CE
OM/SM-DH-CE
1. is connected from the valve outlet with
no intervening valve and directed
downward to a safe point of discharge.
2. allows complete drainage of both the
valve and the discharge line
3. is independently supported and securely
anchored so as to avoid applied stress
on the valve.
4. is as short and straight as possible.
5. terminates freely to atmosphere where
any discharge will be clearly visible and
is at no risk of freezing.
6. terminates with a plain end that is not
threaded.
7. is constructed of a material suitable for
exposure to temperatures of 375º F or
greater.
8. is, over its entire length, of a size equal
to or greater than the valve outlet.
Use only schedule 40 pipe for discharge.
(Do not use schedule 80, extra strong pipe
or connections).
DO NOT CAP, PLUG, OR
OTHERWISE OBSTRUCT DISCHARGE
PIPE OUTLET!
I) See appropriate ASME Boiler and Pressure
Vessel Code for additional installation
instructions.
3.1 Conversion
See Paragraphs 1.8 and 1.9 for important
information for gas conversion. Verify the
type of gas to be used.
To change the type of gas used (e.g. G20 to
G31 or inverse) change the following:
a) Burner injectors. See instruction 3.15 on page 16.
b) Gas valve spring. Install per instructions supplied
with the spring package as shown below.
3. Insert G31 orifice marked BBR14.
4. Reconnect pilot gas line.
d) Data plate with correct rate and gas manifold
pressure information.
ALL CONVERSIONS MUST BE FOR
APPROVED GAS IN THE COUNTRIES LISTED
IN PARAGRAPH 1.9.
c) Pilot orifice. The pilot orifice for correct gas must
be used. See photo below.
1. Remove the gas line and the connector
to the pilot.
2. Remove G20 orifice from the pilot.
It is marked BCR18.
IMPORTANT
THIS APPLIANCE WAS FITTED AT THE
FACTORY WITH GAS INJECTORS FOR TYPE
OF GAS SPECIFIED ON DATA PLATE. PRIOR
TO INSTALLING EQUIPMENT, OR WHEN
CONVERTING TO ANOTHER GAS, VERIFY THAT
THE INJECTOR SIZE MARKING ON THE GAS
INJECTOR MATCHES THE INFORMATION ON
THE DATA PLATE FOR THE TYPE OF GAS
BEING USED.
3.2 Jacket Vacuum
When the kettle is cold, a positive reading or a
reading around zero on the pressure vacuum
gauge indicates an excess of air in the jacket. Air
in the jacket slows down kettle heating.
To remove air:
a) Light the unit. (Paragraph 2.5.1 )
b) When the pressure/vacuum gauge reaches
a positive pressure reading of 5 PSI, release
air and steam by lifting the lever on the
safety valve for about one second. Repeat
this a few times. Then let the lever snap
back to the closed position.
See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.
WARNING
AVOID EXPOSURE TO
STEAM BLOWING
OUT OF THE SAFETY
VALVE.
3.3 Jacket Filling
(TURN OFF GAS AND ELECTRICITY MAINS)
The jacket has been charged at the factory with
the proper amount of treated, distilled water. You
may need to restore jacket water to its proper
level, either because it was lost as steam during
venting or by draining.
OM-SM-DH-CE
OM/SM-DH-CE
1. is connected from the valve outlet with
no intervening valve and directed
downward to a safe point of discharge.
2. allows complete drainage of both the
valve and the discharge line
3. is independently supported and securely
anchored so as to avoid applied stress
on the valve.
4. is as short and straight as possible.
5. terminates freely to atmosphere where
any discharge will be clearly visible and
is at no risk of freezing.
6. terminates with a plain end that is not
threaded.
7. is constructed of a material suitable for
exposure to temperatures of 375º F or
greater.
8. is, over its entire length, of a size equal
to or greater than the valve outlet.
Use only schedule 40 pipe for discharge.
(Do not use schedule 80, extra strong pipe
or connections).
DO NOT CAP, PLUG, OR
OTHERWISE OBSTRUCT DISCHARGE
PIPE OUTLET!
I) See appropriate ASME Boiler and Pressure
Vessel Code for additional installation
instructions.
3.1 Conversion
See Paragraphs 1.8 and 1.9 for important
information for gas conversion. Verify the
type of gas to be used.
To change the type of gas used (e.g. G20 to
G31 or inverse) change the following:
a) Burner injectors. See instruction 3.15 on page 16.
b) Gas valve spring. Install per instructions supplied
with the spring package as shown below.
3. Insert G31 orifice marked BBR14.
4. Reconnect pilot gas line.
d) Data plate with correct rate and gas manifold
pressure information.
ALL CONVERSIONS MUST BE FOR
APPROVED GAS IN THE COUNTRIES LISTED
IN PARAGRAPH 1.9.
c) Pilot orifice. The pilot orifice for correct gas must
be used. See photo below.
1. Remove the gas line and the connector
to the pilot.
2. Remove G20 orifice from the pilot.
It is marked BCR18.
IMPORTANT
THIS APPLIANCE WAS FITTED AT THE
FACTORY WITH GAS INJECTORS FOR TYPE
OF GAS SPECIFIED ON DATA PLATE. PRIOR
TO INSTALLING EQUIPMENT, OR WHEN
CONVERTING TO ANOTHER GAS, VERIFY THAT
THE INJECTOR SIZE MARKING ON THE GAS
INJECTOR MATCHES THE INFORMATION ON
THE DATA PLATE FOR THE TYPE OF GAS
BEING USED.
3.2 Jacket Vacuum
When the kettle is cold, a positive reading or a
reading around zero on the pressure vacuum
gauge indicates an excess of air in the jacket. Air
in the jacket slows down kettle heating.
To remove air:
a) Light the unit. (Paragraph 2.5.1 )
b) When the pressure/vacuum gauge reaches
a positive pressure reading of 5 PSI, release
air and steam by lifting the lever on the
safety valve for about one second. Repeat
this a few times. Then let the lever snap
back to the closed position.
See detailed Instructions on Page 11 pertaining
to Safety Valve installation and operation.
WARNING
AVOID EXPOSURE TO
STEAM BLOWING
OUT OF THE SAFETY
VALVE.
3.3 Jacket Filling
(TURN OFF GAS AND ELECTRICITY MAINS)
The jacket has been charged at the factory with
the proper amount of treated, distilled water. You
may need to restore jacket water to its proper
level, either because it was lost as steam during
venting or by draining.
Pilot
Gas Inlet Tube Connector
Natural Gas/G20 Orifice
BCR18
Propane/G31 Orifice
BCR14
JACKET VACUUM
WARNING: AVOID EXPOSURE TO STEAM BLOWING OUT OF THE SAFETY VALVE.
When the kettle is cold, a positive reading or a reading around zero on the
pressure vacuum gauge indicates an excess of air in the jacket. Air in the jacket
slows down kettle heating.
To remove air:
1. Light the unit.
2. When the pressure/vacuum gauge reaches a positive pressure reading of 5
PSI, release air and steam by lifting the lever on the safety valve for about
one second. Repeat this a few times. Then let the lever snap back to the
closed position.
See detailed Instructions in this section pertaining to Safety Valve installation
and operation.
JACKET FILLING
WARNING: TURN OFF GAS AND ELECTRICITY MAINS
OM-SM-DH-CE
11
OM/SM-DH-CE
Test the operation of the safety valve on a
regular basis.
The minimum required pressure margin for this
type of valve is 10% of the safety relief valve set
pressure, but not less than five PSI.
UNDER NO
CIRCUMSTANCES SHOULD THIS MARGIN
BE LESS THAN 5 PSI. Failure to maintain this
operating margin may result in water leakage
past the seat and accumulation of deposits on
the seating surface. Excessive deposits may
prevent the valve from operating properly, and a
dangerous pressure build-up and equipment
rupture may result.
Maintenance and Testing
CAUTION
BEFORE TESTING, MAKE CERTAIN
DISCHARGE PIPE IS PROPERLY
CONNECTED TO VALVE OUTLET AND
ARRANGED TO CONTAIN AND SAFELY
DISPOSE OF BOILER DISCHARGE (SEE
“INSTALLATION INSTRUCTIONS”).
Under normal operating conditions a “try lever
test” must be performed every two months.
Under severe service conditions, or if corrosion
and/or deposits are noticed within the valve
body, testing must be performed more often. A
“try lever test” must also be performed at the end
of any non-service period.
Test at or near maximum operating pressure by
holding the test lever fully open for at least 5
seconds to flush the valve seat free of sediment
and debris. Then release lever and permit the
valve to snap shut.
If lift lever does not activate, or there is no
evidence of discharge, discontinue use of
equipment immediately and contact a licensed
contractor or qualified service personnel.
Neither Conbraco Industries, Inc. nor its agents
assume any liability for valves improperly
installed or maintained.
This quality Conbraco safety relief valve, along
with proper installation, use, and maintenance,
will provide many years of reliable service and
protection against excessive pressure build-up of
water/steam. Use of this valve for any other
purpose or media places all responsibility upon
the user. Before installing valve or operating
equipment to which it is installed, read
instructions carefully. Always wear proper safety
equipment.
INSTALLATION OF SAFETY VALVE (STEAM)
a) Installation must be performed by qualified
service personnel only.
b) The BTU/hr or lb/hr rating of this valve must
equal or exceed that of the equipment to
which it is attached.
c)
DO NOT use this valve on a coal or wood
boiler having an uncontrolled heat input.
d) Ensure that all connections, including the
valve inlet, are clean and free from any
foreign material.
e) Use pipe compound sparingly, or tape, on
external threads only.
f)
DO NOT USE A PIPE WRENCH! Use
proper type and size wrench on wrench pads
only.
g) This valve must be mounted in a vertical,
upright position directly to a clean, tapped
opening in the top of the boiler or equipment.
Under no circumstances should there be a
flow restriction or valve of any type between
the safety relief valve and the pressure
vessel
h) WARNING! During operation, this valve
may discharge large amounts of steam
and/or hot water. To reduce the potential for
bodily injury and property damage, a
discharge line
MUST be installed that:
The jacket has been charged at the factory with the proper amount of treated,
distilled water. You may need to restore jacket water to its proper level, either
because it was lost as steam during venting or by draining.
The procedure for adding water follows:
1. If you are replacing water lost as steam, use distilled water. If you are
replacing treated water that ran out of the jacket, prepare more treated
water as directed below.
2. Allow the kettle to cool completely. Using the proper size spanner, remove
the pipe plug from above the globe valve.
3. Open the globe valve and pour distilled or treated water into the pipe plug
orifice. Hold the safety valve open while you pour to let air escape from the
jacket.
4. Air introduced to the jacket during the filling operation must be removed to
obtain efficient heating. See Jacket Vacuum.
See detailed Instructions in this section pertaining to Safety Valve installation
and operation.
WATER TREATMENT PROCEDURE
WARNING: READ AND FOLLOW WATER TREATMENT COMPOUND LABEL PRECAUTIONS TO AVOID
INJURY.
1. Fill the mixing container with the measured amount of water required. (See
Table). Use distilled water only.
Model Kettle Capacity Jacket Capacity
DH-20 20 Gal (75.7 L) 1.75 Gal (6.6 L)
DH-40 40 Gal (151.4 L) 1.88 Gal (7.1 L)
DH-60 60 Gal (227.1 L) 3.0 Gal (11.3 L)
DH-80 80 Gal (302.8 L) 3.0 Gal (11.3 L)
2. Hang a strip of pH test paper on the rim of the container, with about 1” of the
strip below the surface of the water.
3. Measure the water treatment compound you will be using. (One way to do
this is to add the compound to the water from a small measuring cup).