Panel Radiators
For Buderus Panel Radiator models:
- Model 21
- Model 22
- Towel Warmers
Design Manual
Panel Radiator
Design Manual
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Table of Contents
1
General Info
5
2
Safety
6
3 Product Description
7
4 Mounting Guidelines
15
5 Radiator Output Ratings
17
6 Radiator Selection Procedure
21
7 Piping Arrangements
22
8 Buderus NB Style Towel Racks
32
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
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Panel Radiator Design Manual | 12.2009
Applications manual
1.
General information
1.1.
This manual
This application manual is intended for engineers,
architects, contractors, and installers. It provides
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sizing information, and system layout assistance for
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Panel Radiator
Design Manual
1.2.
Standards, regulations and directives
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system corresponds to all current regulations and rules.
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piping accessories. It also provides rough in dimensions
and installation procedures.
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temperatures.
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radiator systems at reduced temperatures. When using a
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except on the coldest days of the year.
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and radiator selection. The design and radiator selection
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presented.
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
2.
Safety
2.1.
Layout of the instructions
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WARNING! RISK OF FATAL INJURY
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a product, which might cause serious injury
or death if appropriate care is not taken.
2.4.
Disposal
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— Dispose of defunct components through an
authorized agent in an environmentally
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WARNING! RISK OF INJURY/SYSTEM
DAMAGE
Indicates a potentially dangerous situation
that could cause minor or moderately
serious injuries and damage to property.
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USER NOTE
User tips for optimal use of equipment and
adjustment as well as other useful information.
2.2.
Please follow these instructions
Only use original Buderus spare parts.
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Buderus warranty.
2.3.
Tools, materials and accessories
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
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is a consistent, even heat throughout all panel units in the
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convection heat, the high performance hydronic steel
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Radiant Heat vs. Convection Heat:
3.
Product Description
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room, can cause drafty conditions, and in many cases
results in hot air collecting at the ceiling and cooler air at
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other heating systems.
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heating and design requirement. These space-saving
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and ideal for most existing color schemes. They can also
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a protective cover over it.
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left or right.
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Dimensions
Dry weight
Water volume
HxLxW
lbs
kg
gal
liters
12"x24"x2"
20
9
0.7
12"x36"x2"
1.0
12"x48"x2"
19
12"x59"x2"
50
23
1.6
6.3
12"x63"x2"
54
24
1.8
6.7
12"x71"x2"
60
27
2.0
7.6
20"x24"x2"
35
16
1.0
3.8
20"x36"x2"
52
24
1.5
5.8
20"x48"x2"
69
31
2.0
7.7
20"x59"x2"
85
39
2.5
9.4
20"x63"x2"
91
41
2.6
10.1
20"x71"x2"
102
47
3.0
11.4
24"x24"x2"
41
19
1.2
4.5
24"x36"x2"
62
28
1.7
6.7
24"x48"x2"
83
38
2.3
8.9
24"x59"x2"
102
46
2.9
10.9
24"x63"x2"
108
49
3.1
11.7
24"x71"x2"
122
56
3.4
13.2
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
Buderus Towel Warmers
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Dimensions
Dry weight
Water volume
HxLxW
lbs
kg
gal
liters
12"x16"x4"
7
1.7
12"x24"x4"
11
0.7
12"x36"x4"
1.0
12"x48"x4"
48
22
1.3
5.1
12"x63"x4"
63
28
1.8
6.7
12"x71"x4"
71
32
2.0
7.6
20"x16"x4"
27
12
0.7
2.6
20"x24"x4"
41
19
1.0
3.8
20"x36"x4"
62
28
1.5
5.8
20"x48"x4"
82
37
2.0
7.7
20"x59"x4"
101
46
2.5
9.4
20"x63"x4"
108
49
2.6
10.1
20"x71"x4"
121
121
3.0
11.4
24"x16"x4"
33
15
0.8
3.0
24"x24"x4"
49
22
1.2
4.5
24"x36"x4"
74
34
1.7
6.7
24"x48"x4"
98
45
2.3
8.9
24"x59"x4"
121
55
2.9
10.9
24"x63"x4"
129
59
3.1
11.7
24"x71"x4"
146
66
3.4
13.2
36"x16"x4"
48
22
1.1
4.2
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Radiator Accessories
Piping Connections
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and control of the radiators for different piping
arrangements.
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Mounting Brackets
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Rough in instructions and mounting guidelines are
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to the piping connection on the radiator. When diverter or
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on the valve.
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Pipe size and style
Part #
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
Part no. 1016311
Straight Diverter Valve
w/ isolation valves for
panel radiators
Part no. 1016362
Straight Crossover
Valve w/ isolation
valves for panel
radiators
Part no. 3L602502
Pressure Bypass
Valve 3/4" male
thread for panel
radiators and towel
racks
Part no. 1016312
Angled Diverter
Valve w/ adjustable
bypass and isolation
valves for panel
radiators
Part no. 013G81013
Single Valve, angled
with adjustment
facing down for towel
racks; Head can be
replaced with
thermostatic head
#013G8250 or
Part no. 3L0143
Angled Return
Elbow with
isolation valve for
towel racks
Part no. 013G5002
Manual Adjuster
for panel padiators
and towel racks
Part no. 013G8250
Danfoss
Thermostatic Head
for panel radiators
Part no. 82911060
Drain Valve w/
hose bib for panel
radiators
Fig. 1
Valve/accessory dimensions in inches
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Part no. 80262170
Straight Valve
w/ isolation valves
for panel radiators
Part no. 013G8015
Single Valve, straight with adjustment at front for towel racks;
Head can be replaced with thermostatic head #013G8250
or #82721124
Part no. 80262172
Angled Valve w/
isolation valves for
panel radiators
Part no. 013G8014
Single Valve, angled with adjustment at the front for towel
racks; Head can be replaced with thermostatic head
#013G8250 or #82721124
Part no. 82721124
Buderus Thermostatic
Head for panel
radiators and towel
racks
Part no. 82721180
Buderus Thermostatic
Head w/ remote
sensor for panel
radiators and towel
racks - capillary 79"
(2000 mm)
Fig. 2 Valve/accessory dimensions in inches continued
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
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Floor Brackets
Part Number
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Flow Setter Valve:
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Fig. 3
Flow setter valve adjustment
Flow Balancing:
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Air Vent and Drain Plug
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Diverter Valves:
TO RADIATOR
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GLYHUWHUYDOYHVDUHDYDLODEOHIURP%XGHUXVIRU
XVHLQDRQHSLSHV\VWHP¿J6KXWRIIVDUHORFDWHGRQ
WKHVXSSO\DQGUHWXUQEUDQFKHVWRWKHUDGLDWRUDOORZLQJWR
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complete heating system.
FROM RADIATOR
ISOLATION
VALVES
ADJUSTABLE
BYPASS
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TO RADIATOR
FROM RADIATOR
Straight Valve
Radiator percentage of flow
50
45
40
ADJUSTABLE
BYPASS
35
ISOLATION
VALVES
30
2
1
3
Factory setting
Fig. 4
Straight and Angled Diverter Valves
Number of turns
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Angle Valve
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connect to the diverter valve.
Radiator percentage of flow
50
2.$OORZ´ÀRRUFOHDUDQFHEHORZWKHUDGLDWRUIRUWKH
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45
40
35
30
¾
1
1¼
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Factory setting
Number of turns
Fig. 5
Setting for Straight and Angled diverter valves
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
Thermostatic Sensor head:
Buderus
1
2
Buderus
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Temperature Control:
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the heat output of the panel. When using the thermostatic
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action of the control head. This thermostatic head is
required for individual temperature control at each
radiator. The asterics provides frost protection of the
panel itself provided the heating system is operational.
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DSSUR[LPDWHWHPSHUDWXUHV
Fig. 6
Thermostatic Sensor Head
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Dial
*
1
2
3
4
5
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Panel Radiator Design Manual | 12.2009
Applications manual
4.
Panel Radiator
Design Manual
Mounting Guidelines
Panel Radiator Installation
Model 21 and 22: Wall Mounting
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RWKHUVXSSRUWVRIVXI¿FLHQWVWUHQJWKIRUSDQHOUDGLDWRU
ZHLJKW5DGLDWRUVZLWKDOHQJWKRI" or less require 2
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OHDVW" in from either side for aesthetic reasons. The
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RIWKHEUDFNHW7KHUDGLDWRUZDOOFOHDUDQFHFDQEHVHWDW
"RU" depending on the orientation of the
plastic locating clips. Piping connections are located at
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RIWKHUDGLDWRU7KHSLSLQJZDOORIIVHWLV"RU"
IRUERWK0RGHODQGUDGLDWRUV)RUOHIWKDQG
radiators, measure these dimensions from the left side.
6HH)LJDQGIRUGHWDLOV
1RWH'RQRWDWWHPSWWRPRXQWUDGLDWRUVVROH\WRVKHHW
URFNRUVLPLODUPDWHULDO
5DGLDWRU&OHDUDQFH5HTXLUHPHQWV
&OHDUDQFHIRUULJKWKDQGUDGLDWRUV7DEOH
Clearance
dimensions
Floor
Side of
ÀRZVHWWHU
valve
Minimum
clearance
Reason
PP
- No diverter valves
PP
- Angled diverters
PP
- Straight diverters
PP
&URVVRYHUYDOYHV
PP
7KHUPRVWDWLF6HQVRU+HDG
Side opposing
WKHÀRZVHWWHU
valve
PP
Access to manual air
EOHHGHU
Top
PP
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details.
Model 21 and 22: Floor Mounting
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mount, radiator support, channel section and tightening
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clearance.
Fig. 7
Floor mounting bracket
| 15
Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
Stud
Finished wall
Minimum of
4"
Bracket
1⁹/₁₆"
or
2¹/₁₆"
Bracket
Minimum of
4"
Return
Supply
1 2
Panel Radiator
2½"
2"
TOP VIEW
Fig. 8
2⅝" from
finished
wall to
center of
tapings
1³/16"
Model 21 Panel Radiator Rough in Dimensions in inches for wall mounting
Stud
Finished wall
Minimum of
4"
Bracket
1⁹/₁₆"
or
2¹/₁₆"
Return
Supply
TOP VIEW
1 2
Panel Radiator
4"
Fig. 9
3⅜" from
finished
wall to
center of
tapings
Minimum
of 4"
Bracket
2"
1³/16"
Model 22 Panel Radiator Rough in Dimensions in inches for wall mounting
16 |
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Panel Radiator Design Manual | 12.2009
Applications manual
5.
Panel Radiator
Design Manual
Radiator Output Ratings
2XWSXWVGHSHQGRQSDQHOUDGLDWRUVL]HDYHUDJHZDWHU
temperature, and room temperature.
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of options. If none of them applies, use Figure 10 and
7DEOHWRGHWHUPLQHRXWSXWEDVHGRQLQGLYLGXDO
requirements.
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LQVWRFNUDGLDWRUVDWIRXUGLIIHUHQWZDWHUWHPSHUDWXUHV
8VHWKHKLJKWHPSHUDWXUHFROXPQLIUHVWULFWHGLQZDOO
VSDFH7RPD[LPL]HHI¿FLHQF\LQFRQGHQVLQJERLOHU
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2½
Radiator outputs in BTU/Hr:
Model 21: 2½"PPGHHS7DEOH
Output BTU/hr
Supply
194°F (90°C)
176°F (80°C)
158°F (70°C)
140°F (60°C)
Part Number
Delta T
36°F (20°C)
36°F (20°C)
18°F (10°C)
18°F (10°C)
12"x24"x2½"
1900
1000
12"x36"x2½"
2900
2000
12"x48"x2½"
1900
12"x59"x2½"
4700
3700
3200
2300
3-41259
12"x71"x2½"
5700
4500
4000
2900
3-41271
20"x24"x2½"
2800
2200
1900
1400
3-42024
20"x36"x2½"
4200
3300
2900
2100
3-42036
20"x48"x2½"
5600
4400
3900
2800
3-42048
20"x59"x2½"
7000
5500
4800
3500
3-42059
20"x71"x2½"
8400
6600
5800
4200
3-42071
24"x24"x2½"
3200
2500
2200
1600
3-42424
24"x36"x2½"
4900
3800
3400
2400
3-42436
24"x48"x2½"
6500
5100
4500
3200
3-42448
24"x59"x2½"
8100
6300
5600
4000
3-42459
24"x63"x2½"
8700
6800
6000
4300
24"x71"x2½"
9700
7600
6700
4800
3-42471
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| 17
Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
Model 22: 4"PPGHHS7DEOH
Output BTU/hr
Supply
194°F (90°C)
176°F (80°C)
158°F (70°C)
140°F (60°C)
Part Number
Delta T
36°F (20°C)
36°F (20°C)
18°F (10°C)
18°F (10°C)
12"x16"x4"
1100
12"x24"x4"
1900
1700
1200
12"x36"x4"
2900
12"x48"x4"
4900
3800
3400
2400
3-21248
12"x63"x4"
6500
5100
4500
3300
3-21263
12"x71"x4"
7300
5800
5100
3700
3-21271
20"x16"x4"
2500
2000
1700
1200
3-22016
20"x24"x4"
3700
2900
2600
1900
3-22024
20"x36"x4"
5600
4400
3900
2800
3-22036
20"x48"x4"
7500
5900
5200
3700
3-22048
20"x59"x4"
9300
7300
6400
4600
3-22059
20"x71"x4"
11200
8800
7800
5600
3-22071
24"x16"x4"
2900
2300
2000
1400
3-22416
24"x24"x4"
4300
3400
3000
2200
3-22424
24"x36"x4"
6500
5100
4500
3200
3-22436
24"x48"x4"
8700
6800
6000
4300
3-22448
24"x59"x4"
10800
8400
7400
5300
3-22459
24"x71"x4"
13000
10200
9000
6500
3-22471
36"x16"x4"
3500
2700
2400
1700
3-23616
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
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temperature and temperature drop through the radiator
on the radiator output.
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Note: The listed radiator output depends on the supply
temperature.
Example: Select the proper radiator to heat a porch
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radiator and the porch increases the radiator output. To
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Supply water temperature effect: The effect of different
supply temperatures on the output of panel radiators is
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Fig. 10
Performance Curves Model 22 Radiators
Conversion Factors
Table 9
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Conversion Factor
0.112
1.000
1.272
| 19
Panel Radiator Design Manual | 12.2009
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Panel Radiator
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already accounted for in the conversion factors listed in
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radiation for the different heights as a function of supply
temperature.
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Model 22:8VH´KLJKZLWKDERXWƒ)ƒ&¨7GURS
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Panel Radiator Design Manual | 12.2009
Applications manual
6.
Panel Radiator
Design Manual
Radiator Selection Procedure
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‡ Desired piping arrangement.
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selection.
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capacity to match the heat loss. Oversizing is not a
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temperature sensitive controls are used to cycle the heat
off once the desired room temperature is reached.
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comfort.
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over sizing radiation in main living areas as they are
generally maintained at uniform temperatures.
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a constant circulation system maintain a more uniform
room temperature and respond faster to temperature
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internal heat gain from appliances, lights, etc. compared
to a centrally located thermostat system.
| 21
Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
7.
Piping Arrangements
One-Pipe System Options
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involves selection of a piping system, pipe sizes, overall
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Figure 11 presents three different one-pipe
arrangements. In any one-pipe system, a single pipe
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sizing procedure is outlined.
Pipe size*
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½" copper
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1" copper
120,000
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210,000
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20,000
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temperature control. Do not exceed heat loads as listed
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Radiator
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each radiator provide very easy means for individual
temperature drop.
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This chapter discusses several piping arrangements,
important to size the main supply and return pipes for the
guidelines for system design, pipe size, pump selection
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Option 2: one-pipe system with diverter valves
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This equation is used extensively for accurate sizing of
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radiators.
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heads on each radiator provide an easy means for
individual temperature control. The system
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10 for pipe sizing. It is important to size the main supply
and return pipes for the total heat load and volume to
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Option 3: Multiple one-pipe systems.
2SWLRQVDQGDERYHFDQEHLQVWDOOHGLQDPXOWLSOHORRS
IDVKLRQZKHUHVHYHUDORQHSLSHV\VWHPVDUHFRQQHFWHG
EHWZHHQDFRPPRQVXSSO\DQGUHWXUQPDQLIROG$VVXUH
DGHTXDWHÀRZLQDOOSLSLQJV\VWHPVZKHQXVLQJPRQRÀRZ
ORRSVDQGRUGLYHUWHUYDOYHORRSV,VRODWLRQDQGEDODQFLQJ
valves are recommended on each loop for service and
ÀRZFRQWURO
A properly sized pump operating on constant circulation
FDQVXSSO\ZDWHUWRDOOORRSV$VLQJOH*UXQGIRV83
RUHTXLYDOHQWFDQKDQGOHXSWRGLYHUWHUYDOYHORRSVXVH
D*UXQGIRV83RUHTXLYDOHQWIRUWRORRSV6L]H
WKHPDLQSLSLQJIRUWKHFRPELQHGÀRZLQDOOEUDQFKHV
IROORZLQJWKHJXLGHOLQHVLQ7DEOH5HIHUWRWKH3UHVVXUH
'URS&XUYHV)LJRQSDJHVIRU
HVWLPDWLQJWKHSUHVVXUHGURSWKURXJKHDFKUDGLDWRUZKHQ
XVLQJPRQRÀRZWHHV8VHWKH3UHVVXUH'URS'LDJUDPRQ
SDJHIRUDRQHSLSHV\VWHPZLWKGLYHUWHUYDOYHV8VH
WKHDSSUR[LPDWHÀRZUDWHWKURXJKWKHUDGLDWRUDQGÀRZ
setter valve setting to read off the pressure drop. Size the
FLUFXODWRUEDVHGRQWRWDOÀRZDQGRYHUDOOV\VWHPSUHVVXUH
drop. Thermostatic heads are required in this
arrangement for individual temperature control.
Ensure all supply and return piping is sized properly to
avoid restriction and noise.
Option 1: One-Pipe System with Venturi Tees or Monoflow Tees.
1 2
1 2
1 2
Option 2: One-Pipe System with Diverter Valves.
1 2
1 2
1 2
Option 3: Multiple One-Pipe System (Home Run).
1 2
1 2
1 2
Drawing not to scale
Fig. 11
One-Pipe System Options
| 23
Panel Radiator Design Manual | 12.2009
7HFKQLFDOVSHFL¿FDWLRQVDUHVXEMHFWWRFKDQJHZLWKRXWSULRUQRWLFH
Panel Radiator
Design Manual
Design procedure for One-Pipe System with
PRQRÀRZWHHVRUGLYHUWHUYDOYHV
Table 11
5RRP
1
Select
room
sequence
2
+HDWORDG
per room
'HWHUPLQHOLQHDUIRRWDJHRIZDOOVSDFHDYDLODEOHIRU
each radiator.
3
%78KU
&RPSXWHWKHUHTXLUHGKHDWORDGSHUIRRWIRUHDFK
room.
4
6HOHFWV\VWHPWHPSHUDWXUHGURS¨7 RUƒ)
ƒ&ƒ&ƒ&DQGPD[LPXPVXSSO\WHPSHUDWXUH
$YDLODEOH
ZDOOVSDFH
IW
5
Minimum
Required
+HDW/RDG
per linear
IW%78IW
ǻ7 BBBž)6XSSO\WHPSURRP
PD[VXSSO\WHPS
BBBBBBBž)
Total
heat load
%78IW
4 BBBBBBBBBB%78+U
6HOHFWUDGLDWRUKRRNXSVHTXHQFH
2. Determine individual heat loads.
&RPSXWHWKHWRWDOKHDWORDG4LQWKHORRSE\DGGLQJ
the individual heat loads.
'HWHUPLQHORRSÀRZUDWHIURPWRWDOKHDWORDG4DQG
VHOHFWHG¨7DV*30ORRS 4¨7
&RPSXWHWKHVXSSO\WHPSHUDWXUHIRUHDFKURRPEDVHG
on the supply temperature and heat load of the
SUHYLRXVURRPDQGWKHWRWDOORRSÀRZUDWH*30DV
New Supply Temp = Previous Supply Temp - (Q room)
/ 500 / GPM
:LWKWKHVXSSO\WHPSHUDWXUHFRPSXWHGLQ6WHSDQGWKH
OLQHDUKHDWORDGLQ6WHSUHIHUWR)LJXUHWR¿QGWKH
UHTXLUHGUDGLDWRUVL]HRUWDEOHVDQGIRUWKHWRWDO
individual radiator output if the any of the four examples
DSSOLHV8VHWKHVDPH¨7YDOXHLQUHDGLQJIURPWKH
FXUYHVLQ)LJXUHDVWKHVHOHFWHGYDOXHLQ6WHS,Q
FDVHPRUHWKDQRQHUDGLDWRULVWREHLQVWDOOHGLQDURRP
VL]HDOOUDGLDWRUVEDVHGRQWKHDERYHSURFHGXUH
6
7
8
9
Total loop
GPM
Supply
temp per
room
List
SRVVLEOH
radiator
Models
and sizes
Room 1
Room 2
5RRP
*30ORRS 4ǻ7 BBBB*30
BBBBž)
BBBBž)
BBBBž)
BBBBž)
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
([DPSOH2QH3LSH6\VWHP/D\RXW
'HVLJQDRQHSLSHV\VWHPIRUDVHFRQGÀRRUZLWK
LQGLYLGXDOURRPWHPSHUDWXUHFRQWURO
Table 12
Description
Heat Load
Window
Size
Hook-up
Sequence
Bathroom
[IWZLGH
¿UVW
Master Bedroom
9,000
[IWZLGH
second
Bedroom 2
[IWZLGH
third
Bedroom 3
[IWZLGH
fourth
Solution:
6WHS&RPSOHWHWKH5DGLDWRU6L]LQJ6KHHWWR¿QG
minimum size radiator.
Step 2. Select control strategy and size piping and pump
using 7DEOH
5HVXOWV2XWSXWIW5DGLDWRU0RGHOV
%HGURRP6XSSO\7HPS ƒ)ƒ&%WXIW
´
0%HGURRP6XSSO\7HPS ƒ)ƒ&%WXIW
#22 x 12
%HGURRP6XSSO\7HPS ƒ)ƒ&%WXIW
´
%HGURRP6XSSO\7HPS ƒ)ƒ&%WXIW
´
8VH´3(;DQGGLYHUWHUYDOYHVRU´FRSSHUPDLQ
OLQHZLWK´[´[´PRQRÀRZWHHVZLWK
thermostatic heads on all radiators for individual room
FRQWURO3ODFHDWKHUPRVWDWLQWKHEDWKURRPRUPDVWHU
EHGURRPRUUXQFRQVWDQWFLUFXODWLRQ8VHD*UXQGIRV
83D7DFRRUHTXLYDOHQWSXPSZLWKD
EDODQFLQJYDOYHWRWKURWWOHWKHÀRZ1RLVHPD\RWKHUZLVH
develop in the diverter valves.
Table 13
1
Select
room
sequence
%DWKURRP
Master
%HGURRP
%HGURRP
2
%HGURRP
2
+HDWORDG
per room
9000
3
$YDLODEOH
ZDOOVSDFH
IW
2
2000
6WHS6HH7DEOH
6WHS$VVXPHWHPSHUDWXUHGURS¨7 ƒ)ƒ&
PD[LPXPVXSSO\WHPSHUDWXUH ƒ)ƒ&
6WHS$GGDOOKHDWORDGVIURPURZDQGHQWHULQ6WHS
6WHS&RPSXWHÀRZUDWHLQWKHRQHSLSHV\VWHPLQ
GPM.
4
7KHÀRZUDWHFDQQRWH[FHHG*30ZKHQ
XVLQJGLYHUWHUYDOYHV8VLQJDODUJHU¨7ORZHUV
the GPM.
6WHS+HUHZHPXVWFRPSXWHWKHVXSSO\WHPSHUDWXUH
IRUHDFKURRP6WDUWZLWKWKH¿UVWURRPDQG
FRPSXWHHDFKVXSSO\WHPSHUDWXUHVWHSE\VWHS
DVVKRZQKHUH
5
6XSSO\7HPS ƒ)ƒ&
6
6XSSO\7HPS [ ƒ)
ƒ&
7
6XSSO\7HPS [ ƒ)
ƒ&
8
6XSSO\7HPS [ ƒ)
ƒ&
6WHS1RZZLWKHDFKYDOXHFRPSXWHGLQVWHSVDQG
locate those values in Fig. 10. The output curve
ORFDWHGGLUHFWO\DERYHWKDWSRLQWLGHQWL¿HVWKH
PLQLPXPVL]HUDGLDWRUUHTXLUHG8VHWKHƒ)
ƒ&¨7FXUYHVLIGHVLJQLQJIRUDWRƒ)
WRƒ&WHPSHUDWXUHGURSXVHWKHƒ)ƒ&
¨7FXUYHVLIGHVLJQLQJIRUDƒ)ƒ&GURS
9
Minimum
required
heat
load per
linear foot
%78IW
Minimum
Required
+HDW/RDG
per linear
IW%78IW
Total
heat load
%78IW
Total loop
GPM
Supply
temp per
room
ǻ7 30ºF
6XSSO\WHPSHUDWXUHURRP
PD[VXSSO\WHPSHUDWXUH
180 ºF
4 %78+U
*30 4ǻ7 *30
ǻ7 4*30
3RVVLEOH
radiator
Models
and sizes
| 25
Panel Radiator Design Manual | 12.2009
7HFKQLFDOVSHFL¿FDWLRQVDUHVXEMHFWWRFKDQJHZLWKRXWSULRUQRWLFH
Panel Radiator
Design Manual
Two-Pipe System Options
)LJXUHLOOXVWUDWHVWZRFRPPRQWZRSLSHFRQ¿JXUDWLRQV
Option 4: Two-Pipe Direct Return System
1 2
1 2
1 2
Option 5: Two-Pipe Reverse Return System
1 2
1 2
1 2
Pressure Bypass Valve
Drawing not to scale
Fig. 12
Two-pipe System Options
%HQH¿WVRI7ZR3LSH6\VWHPV
Requirements for Two-Pipe System:
(DFKUDGLDWRULVVXSSOLHGZLWKWKHVDPH
WHPSHUDWXUHZDWHUPD[LPL]LQJUDGLDWRURXWSXW
‡7ZRPDLQGLVWULEXWLRQSLSHVDUHQHHGHGRQHIRU
the supply to the radiators and a second pipe for the
UHWXUQWRWKHERLOHU
1ROLPLWWRWKHQXPEHURIUDGLDWRUVRQDWZRSLSH
V\VWHPORRSWKHVXSSO\DQGUHWXUQPDLQVPXVWEHVL]HG
IRUPD[LPXPÀRZ)ROORZWKHJXLGHOLQHVLQ7DEOHIRU
VL]LQJWKHVXSSO\DQGUHWXUQUXQV8VH´FRSSHURU
3(;WXELQJWRFRQQHFWUDGLDWRUVWRPDLQUXQV
,QGLYLGXDOUDGLDWRUFRQWUROLVHDVLO\GRQHXVLQJ
WKHUPRVWDWLFVHQVRUKHDGV8VHFRQVWDQWFLUFXODWLRQZLWK
outdoor reset control for optimum system performance. A
FHQWUDOWKHUPRVWDWFDQEHXVHGIRURQRIIFRQWURO
KRZHYHUWKHUPRVWDWORFDWLRQJRYHUQVRYHUDOOV\VWHP
control and may override individual room control.
‡$SUHVVXUHDFWXDWHGE\SDVVYDOYH3DUW1R
/IRUD´'DQIRVVYDOYHFRQQHFWHGEHWZHHQ
supply and return mains is necessary on constant
FLUFXODWLRQV\VWHPVZLWKWKHUPRVWDWLFDOO\FRQWUROOHG
UDGLDWRUVWRSUHYHQWGHDGKHDGLQJWKHSXPS7KLVE\SDVV
valve is not needed on thermostat controlled systems if
WKHUDGLDWRUVDUHQRWHTXLSSHGZLWKWKHUPRVWDWLFVHQVRU
heads.
26 |
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Design Procedure for Two-Pipe System
1. Determine individual heat loads.
Table 14
1
Select
room
sequence
2
+HDWORDG
per room
3
%78KU
4
$YDLODEOH
ZDOOVSDFH
IW
5
Minimum
Required
+HDW/RDG
per linear
IW%78IW
2. Select desired overall temperature drop of systems
¨7LHƒ)ƒ&ƒ)ƒ&RUƒ)ƒ&
&RPSXWHORRSÀRZUDWH*30IURP
*30 4¨7
8VH)LJXUHRUWKH&RQYHUVLRQ)DFWRUVLQ7DEOHWR
GHWHUPLQHRXWSXWRIUDGLDWRUPRGHOVLQFDVHRIORZHU
supply temperatures.
8VHWKH3UHVVXUH'URS&KDUWRQSDJHVDVD
JXLGHWRVHWWKHÀRZVHWWHUYDOYHIRUHDFKUDGLDWRUWR
HQVXUHSURSHUÀRZWKURXJKHDFKUDGLDWRU$GMXVWÀRZ
VHWWHUYDOYHVDVQHHGHGEDVHGRQV\VWHP
SHUIRUPDQFH&ORVHGRZQWKHÀRZVHWWHURQ³KRW´
UDGLDWRUVE\GLDOLQJLQDORZHUVHWWLQJRQWKHDGMXVWPHQW
ULQJRUDGMXVWWKHÀRZVHWWHUWRDKLJKHUVHWWLQJIRU
³FRRO´UDGLDWRUV
6L]HSLSLQJEDVHGRQV\VWHPÀRZUDWHVL]HFLUFXODWRU
EDVHGRQÀRZUDWHDQGRYHUDOOV\VWHPSUHVVXUHGURS
6
7
8
9
Total
heat load
%78IW
Total loop
GPM
Supply
temp per
room
List
SRVVLEOH
radiator
Models
and sizes
Room 1
Room 2
5RRP
5RRP
ǻ7 BBBž)6XSSO\WHPSURRP PD[VXSSO\
WHPS BBBBBBBž)
4 BBBBBBBBBB%78+U
*30ORRS 4[ǻ7 BBBBBB*30
BBBBž)
BBBBž)
BBBBž)
BBBBž)
| 27
Panel Radiator Design Manual | 12.2009
7HFKQLFDOVSHFL¿FDWLRQVDUHVXEMHFWWRFKDQJHZLWKRXWSULRUQRWLFH
Panel Radiator
Design Manual
Example 2: Two-pipe System Lay-out
'HVLJQDQGVHOHFWDWZRSLSHSDQHOUDGLDWRUV\VWHPZLWK
WKHIROORZLQJUHTXLUHPHQWV
7DEOH5DGLDWRU2SWLRQ'HWHUPLQDWLRQ&KDUW7ZR3LSH
System
Table 16
Table 15
Description
Heat Load
Window
Size
Required
BTU/ft
Walk-in closet
2,000
none
Bathroom
[IWZLGH
Bedroom 1
[IWZLGH
Bedroom 2
10,000
[IWZLGH
Master Bedroom
12,000
[IWZLGH
7RWDO/RDG%WXKU
6\VWHP3DUDPHWHUV
0D[LPXP6XSSO\7HPSHUDWXUHƒ)ƒ&
7KHUPRVWDWLQPDVWHUEHGURRPIRU212))FRQWURO
Description
Heat
Load
BTU/
ft
Walk-in
closet
2000
Bathroom
Bedroom
1
Bedroom
2
Master
Bedroom
Selected
Models
No. and
length of
radiators
Flowsetter
valve
1
1x #22
[
[IW
2x #22
[
[IW
10000
2x #22
[
[IW
12000
2x #22
[
[IW
7-N
Solution: Two-Pipe System Lay-out
,IVXI¿FLHQWVSDFHLVDYDLODEOHIRUUDGLDWRUVVHOHFW
UDGLDWRUVEDVHGRQUHTXLUHGKHDWRXWSXWDQGGHVLUHG
VW\OH6HOHFWUDGLDWRUVIURP7DEOHVVLQFHWKH
system temperature is similar to those listed.
,IWKHUDGLDWRUVPXVWEHVL]HGIRUWKHDYDLODEOHZLQGRZ
space, determine the minimum needed model radiator
EDVHGRQWKHUHTXLUHG%WXIWIRUHDFKURRPIURP)LJXUH
ZLWKDƒ)ƒ&VXSSO\WHPSHUDWXUH8VHWKH
VDPHVXSSO\WHPSHUDWXUHIRUHDFKUDGLDWRULQDWZRSLSH
system.
6HOHFWDQRYHUDOOWHPSHUDWXUHGURSRIƒ)ƒ&
&RPSXWHV\VWHPÀRZUDWHDV*30 4¨7 *30
&RPELQHDOOLQIRUPDWLRQLQWDEXODUIRUPDVVKRZQLQ
7DEOH
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Panel Radiator Design Manual | 12.2009
Applications manual
Balancing the system
,QLWLDOVHWWLQJVRIÀRZVHWWHUYDOYHVZLOOKHOSWR
HQVXUHSURSHUÀRZWKURXJKDOOUDGLDWRUV
Keep in mind that this is only a starting point
and that the system may require further
DGMXVWPHQWEDVHGRQWKHKHDWLQJ
characteristics of the structure.
3URFHGXUHIRUVHWWLQJWKHÀRZVHWWHUYDOYHV
,GHQWLI\WKHODUJHVWUDGLDWRU,QWKHDERYHH[DPSOHLW
ZRXOGEHWKHPDVWHUEHGURRPUDGLDWRU7KHVHWWLQJIRU
WKLVUDGLDWRUVKRXOGEH³1´7KLVUDGLDWRUZLOOKDYHWKH
KLJKHVWSUHVVXUHGURSDQGUHTXLUHVWKDWWKHÀRZVHWWHU
YDOYHEHIXOO\RSHQ
8VLQJWKH3UHVVXUH'URS&KDUWRQSDJH¿QGWKH
RXWSXWIRUWKLVUDGLDWRUDWVHOHFWHG¨7DWWKHERWWRPRI
WKHFKDUW%DVHGRQEWXKUDWDƒ)¨7WKHÀRZ
UDWHIRUWKLVUDGLDWRULV*30)ROORZWKH*30
line vertically until you intersect the N setting. Reading
DFURVVWRWKHOHIW\RXZLOOVHHWKDWWKHSUHVVXUHGURSIRU
WKLVUDGLDWRULVDSSUR[LPDWHO\LQ:&RUIWKG
'UDZDKRUL]RQWDOOLQHDFURVVWKHGLDJUDPDWLQ
:&
Panel Radiator
Design Manual
Piping Lay-out Suggestions:
)RUVPDOOV\VWHPVXVHRQHSLSHV\VWHPZLWK
PRQRÀRZWHHVRUGLYHUWHUYDOYHV
%WX¶VSHUORRS
%WXKUZLWK³FRSSHU
%WXKUZLWK³3(;
Increasing the overall temperature drop in the system
IURPƒ)ƒ&WRƒ)ƒ&RUƒ)ƒ&
SHUPLWVPRUHUDGLDWLRQSHUORRS6HH7DEOH
2YHUVL]HUDGLDWRUVE\DWWKHHQGRIDRQH
SLSHORRS$OZD\VLQVWDOODEDODQFLQJYDOYHLQHDFK
ORRSWRUHJXODWHWKHÀRZUDWHWRHOLPLQDWHSRVVLEOHÀRZ
noise.
0D[LPXPÀRZUDWHIRUGLYHUWHUYDOYHV*30
0D[LPXPÀRZUDWHSHUUDGLDWRU*30
)RUODUJHUV\VWHPVXVHWZRSLSHUHYHUVHUHWXUQRU
PXOWLSOHRQHSLSHV\VWHPVZLWKFRPPRQVXSSO\DQG
UHWXUQPDQLIROGV5HIHUWR7DEOHIRUSLSHVL]LQJ
3XPS6HOHFWLRQ
ORRSV*UXQGIRV837DFRRUHTXLYDOHQW
ORRSV*UXQGIRVRUHTXLYDOHQW
8VHSUHVVXUHE\SDVVYDOYHRQWZRSLSHV\VWHPVWR
prevent deadheading the pump.
6HOHFWWKHQH[WUDGLDWRU,GHQWLI\LWVEWXKURXWSXWORFDWH
WKLV¿JXUHDWWKHERWWRPRIWKHFKDUWDV\RXGLGIRUWKH Radiator Selection & System Start-up Suggestions:
¿UVWUDGLDWRU$WWKHFRUUHVSRQGLQJÀRZUDWHPRYH
vertically on chart until you intersect the horizontal line 6L]HUDGLDWRUVEDVHGRQKHDWORDGORFDWLRQDYDLODEOH
space, desired style and system operating
WKDW\RXGUHZLQGLFDWLQJ´:&)LQGWKHDSSURSULDWH
temperatures.
ÀRZVHWWLQJ,IWKHYDOXHLVEHWZHHQWZRVHWWLQJVVD\
DQGWKHQVLPSO\VHWWKHYDOYHEHWZHHQDQG
2. Use of thermostatic sensor heads increases comfort,
HOLPLQDWHVSUREOHPVZLWKRYHUVL]LQJWKHUDGLDWLRQDQG
5HSHDWVWHSIRUUHPDLQLQJUDGLDWRUV
provides individual room control.
8VHJXLGHOLQHVLQ7DEOHWRVL]HPDLQSLSLQJ,QWKLV
FDVHXVH´FRSSHUPDLQVZLWK´FRSSHURU3(; %DODQFHWKHV\VWHPWRHQVXUHSURSHUKHDWRXWSXWIURP
HDFKUDGLDWRUXVLQJWKHÀRZVHWWHUYDOYHRQHDFK
WRIURPHDFKUDGLDWRU,QVWDOODWKHUPRVWDWLQPDVWHU
radiator. Shut off thermostatic heads one at a time and
EHGURRP6L]HFLUFXODWRUEDVHGRQWRWDOÀRZUDWHDQG
PRQLWRUV\VWHPUHVSRQVH0DNHQHFHVVDU\
LQVWDOOEDODQFLQJYDOYHIRUÀRZFRQWURO
DGMXVWPHQWV
5HWLJKWHQFRPSUHVVLRQ¿WWLQJVVOLJKWO\DIWHULQLWLDO
start-up.
| 29
Panel Radiator Design Manual | 12.2009
7HFKQLFDOVSHFL¿FDWLRQVDUHVXEMHFWWRFKDQJHZLWKRXWSULRUQRWLFH
Panel Radiator
Design Manual
Pressure drop curves:
Settings on flowsetter
1
2 3
4
5
6
7
N
Pressure Drop in Inches H 0
²
200
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
0.05
0.08 0.1
0.2
0.3 0.4 0.5 0.6 0.7 0.9 1
GPM
BTU/Hr
500
1,000
2,000
5,000
10,000
750
1,500
3,000
7,500
15,000
1,000
2,000
4,000
10,000
20,000
BTU/Hr
BTU/Hr
2
3
∆T = 20°F (10°C)
∆T = 30°F (15°C)
∆T = 40°F (20°C)
Fig. 13
30 |
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
35
45
% Radiator Flow
50
40
30
3
∆p Head in Feet
2
1
0.50
0.75
1.0
1.5
2.0
Circuit Flow - GPM
2.5
3.0
4.0
Fig. 14
| 31
Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
8.
Buderus NB Style Towel Racks
7KH1REOHVVHVW\OHWRZHOUDFNVDUHDWWUDFWLYHO\GHVLJQHG
ZLWKDYHUWLFDOIUDPHRIWZRURXQGSLSHVFRQQHFWHG
KRUL]RQWDOO\ZLWK´FXUYHGURXQGVWHHOWXELQJSUHFLVLRQ
ZHOGHGLQWKHLQWHULRU7ZRò´137IHPDOHWDSLQJVDUH
DYDLODEOHRQWKHERWWRPRIWKHWRZHOUDFNIRUWKHVXSSO\
and return. An air vent is already installed on the top right
RIWKH1%WRZHOUDFN7KH1%KDVDQDGMXVWDEOHRIIVHWRI
´DQG´IURPWKHZDOO
$OOWRZHOUDFNVFRPHLQDPXOWLOD\HUHGSRZGHUFRDW
HQDPHOZKLWH¿QLVKWKDWLVGXUDEOHHDV\WRFOHDQDQG
ideal for most existing color schemes. Supply and return
SLSHVDUHUHYHUVLEOH2SHQLQJVLQWKHWRZHOUDFNDUH
SURYLGHGWRKDQJWRZHOV&RPSOHWHZDOOPRXQWLQJ
KDUGZDUHDQGDPDQXDODLUYHQWLVVXSSOLHGZLWKHDFK
WRZHOUDFN
NB Style towel rack stock sizes
Table 17
Model #
Dimensions
KHLJKW[
ZLGWK
BTU @
ž)
Approx.
Ship Wt.
Part NO.
1%WRZHO
UDFN
[
2,000
OEV
1%
1%WRZHO
UDFN
[
OEV
1%
1%WRZHO
UDFN
[
OEV
1%
,WHPFDQEHVKLSSHGYLD836
)RUSLSLQJDFFHVVRULHVDYDLODEOHWKURXJK%XGHUXVIRUD
FOHDQ¿QLVKLQVWDOODWLRQVHH)LJXUHVDQG
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Panel Radiator Design Manual | 12.2009
Applications manual
Panel Radiator
Design Manual
Width - 24"
Finished
Wall
Bleeder
(installed)
2"
Recommended Bracket
locations
16"
Recommended bracket
spacing
32" Towel Rack - 25"
47" Towel Rack - 41"
72" Towel Rack - 65"
Recommended Bracket
location
Top view
Adjustable
from
3" to 4"
21½"
center to center
½"
Taping
½"
Taping
Recommended minimum
floor clearance 6"
Fig. 15 Buderus NB Style Towel Warmers
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Panel Radiator Design Manual | 12.2009
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Panel Radiator
Design Manual
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Panel Radiator Design Manual | 12.2009
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