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Concept Plus Installation Manual rev-d 1
Installation
&
Piping Booklet

REV: D
CONCEPT

PLUS
- STEEL
P
ANEL
RADIA
T
O
RS

Distributed By:
QHT
QUINCY HYDRONIC TECHNOLOGIES, INC.
80 ROCHESTER AVE. SUITE #12
PORTSMOUTH, NH 03801
PHONE: 603-334-6400
FAX: 603-334-6401 2 3


TABLE OF CONTENTS


CONCEPT PLUS- STEEL



Section
Page
PANEL
RADIATORS


Table of Contents






3

General Information


1

4

Radiator Sizing



2

5

Correction Factors



2

6

Flow Rate and Pressure Drops

3

7-8

Rough-in Piping



4

9

Radiator Mounting



5

10

Correction Options


6

11

Suggested General Piping Layouts
7


Option 1: Series





12


Option 2: One Pipe Diverter Tee



13


Option 3: Parallel Reverse-Return



14


Option 4: Manifold




15 4
Outputs are based on 176º F mean water temperature and 68º F
room temperature.
1. GENERAL INFORMATION
Radiator
Model

Height
(in)

Length
(in)

Output (BTU)

Single
Panel
Double
Panel
B-12.16-Plus
12
16

1,880
B-12.24-Plus
12
24
2,546
B-12.32-Plus
12
32
3,395
B-12.40-Plus
12
40
4,243
B-12.48-Plus
12
48
5,092
B-12.56-Plus
12
56
5,941
B-12.64-Plus
12
64
6,790
B-20.16-Plus
20
16
1,610

2,505
B-20.20-Plus
20
20
2,011
3,129
B-20.24-Plus
20
24
2,412
3,754
B-20.28-Plus
20
28
2,815
4,382
B-20.32-Plus
20
32
3,218
5,006
B-20.36-Plus
20
36
3,620
5,634
B-20.40-Plus
20
40
4,023
6,259
B-20.44-Plus
20
44
4,425

6,883
B-20.48-Plus
20
48
7,511
B-24.16-Plus
24
16
2,938
B-24.20-Plus
24
20
3,672
B-24.24-Plus
24
24
4,406
B-24.36-Plus
24
36
6,610
B-24.40-Plus
24
40
7,344
B-24.48-Plus
24
48
8,815
B-24.64-Plus
24
64
11,750
B-24.71-Plus
24
71
13,221

4,828
B-36.24-Plus
36
24
5,953
B-36.20-Plus
36
20
4,953
RV-102 82 53 : 1/2 Female to 3/4 Male Adapter (2 are
included w / each radiator)
RV-101 68 64 : 1/2 B.S.P X 1/2 Copper Compression
RV-164 68 50 : 1/2 B.S.P X 1/2 PEX Compression
RV-101 58 13 : 1/2 Straight Isolating Valve
RV-101 58 14 : 1/2 Angle Isolating Valve
RV-101 59 33 : 1/2 Straight Diverter Valve
RV-101 59 34 : 1/2 Angle Diverter Valve
RV-101 13 65 : UNI XH Non-Electric Actuator Head
RV-8 RADSNAP: 8 white plastic snap-on pipe cover
Valves & Accessories

Single Panel
Height
(in)
Water
Content
(gal/ft)
Weight
(lbs/ft)
Water
Content
(gal/ft)
Weight
(lbs/ft)
12


0.31
14.51
20
0.42
16.76
0.42
20.76
24


0.49
25.33
Double Panel
Weight & Water Content
Note: The water weight can be calculated by
multiplying the water content (gal) by the
weight of water 8.3 (lbs/gal).
Vent
Drain
Thermostatic
Insert
Plug
Supply
Return
Concept Plus steel panel radiators are supplied in heights of 12, 20, & 24 inches and a variety of lengths and heat
outputs. All sizes are available in double panel and limited sizes are available in high output single panel. Below is a
list of sizes and outputs.
Each radiator has a manufacturers 5 year guarantee, from the date of install, against all defects caused by faulty
materials or workmanship during manufacturing. All radiators are tested to 174 psi at the factory and are suitable for
a working pressure up to 145 psi.
All radiators are manufactured with six 1/2 B.S.P. connections (2 side inlets, 2 side outlets, 1 bottom inlet and 1
bottom outlet). The picture below shows the location of the standard components which are factory installed in each
radiator (one 1/2 B.S.P. plug, one 1/2 B.S.P drain plug, one 1/2 B.S.P. air vent, and one thermostatic insert). In
addition to the standard equipment, the following connection and valve arrangements are available to be ordered
separately. 5
2. RADIATOR SIZING
Sizing:
After the heat load for the house is calculated the adequate size and number or radiators can be chosen. Using
the heat load for each room and the general information chart on the previous page find a radiator that will meet
the needed heat load. The radiators should be placed on outside walls where adequate space is available. If there is
not enough wall space in a room to accommodate the needed size then two smaller radiators should be chosen.

Correction Factors:
The outputs in the general information chart are based on a mean temperature of 176º F and a room temperature
of 68º F. Since these temperatures will not fit every situation, correction factors can be used to find the effective
heat output of a radiator at different temperatures.

The effect heat output is calculated by simply multiplying the standard output (mean temp of 176º F and room
temp of 68º F) by the correction factor for the desired temperatures found in the chart on the next page.

Example:
A room with a heat load of 7,500BTU/H would need a B-20.48DBL with a standard output of 7,511BTU/H. For
a supply temperature of 185º F, a return temperature of 158º F and a room temperature of 72ºF the correction factor
is .90 so a larger radiator must be chosen. A B-24.48DBL has a standard output of 8,815BTU/H. The effective
output is calculated using the formula below.

Effective Output = Standard Output X Correction Factor

7,933BTU/H = 8,815BTU/H X .90

The effective output of 7,933BTU/H is more than adequate to fulfill the heat load of the room. If a B-24.48DBL
is too large to fit in the room then two B-20.28DBLs can be used instead. They each have a standard output of
4,382BTU/H for a total of 8,764BTU/H with a total effective output of 7,887BTU/H at the same .90 correction
factor. 6
Water Temperature

Supply (°F)
Return (°F)
50
54
59
64
68
72
75
194
185
1.40
1.35
1.28
1.21
1.17
1.12
1.08
194
176
1.34
1.29
1.22
1.15
1.11
1.07
1.02
194
167
1.28
1.23
1.17
1.10
1.06
1.01
0.97
194
158
1.22
1.18
1.11
1.04
1.00
0.96
0.91
185
176
1.28
1.23
1.17
1.10
1.06
1.01
0.97
185
167
1.22
1.18
1.11
1.04
1.00
0.96
0.91
185
158
1.17
1.12
1.06
0.99
0.95
0.90
0.86
185
149
1.11
1.07
1.00
0.94
0.89
0.85
0.81
176
167
1.17
1.12
1.06
0.99
0.95
0.90
0.86
176
158
1.11
1.07
1.00
0.94
0.89
0.85
0.81
176
149
1.06
1.01
0.95
0.88
0.84
0.80
0.76
176
140
1.00
0.96
0.89
0.83
0.79
0.75
0.71
167
158
1.06
1.01
0.95
0.88
0.84
0.80
0.76
167
149
1.00
0.96
0.89
0.83
0.79
0.75
0.71
167
140
0.95
0.90
0.84
0.78
0.74
0.70
0.66
167
131
0.89
0.85
0.79
0.73
0.69
0.65
0.61
158
149
0.95
0.90
0.84
0.78
0.74
0.70
0.66
158
140
0.89
0.85
0.79
0.73
0.69
0.65
0.61
158
131
0.84
0.80
0.74
0.68
0.64
0.60
0.56
158
122
0.79
0.75
0.69
0.63
0.59
0.55
0.52
149
140
0.84
0.80
0.74
0.68
0.64
0.60
0.56
149
131
0.79
0.75
0.69
0.63
0.59
0.55
0.52
149
122
0.74
0.70
0.64
0.58
0.54
0.51
0.47
149
113
0.69
0.65
0.59
0.53
0.50
0.46
0.42
140
131
0.74
0.70
0.64
0.58
0.54
0.51
0.47
140
122
0.69
0.65
0.59
0.53
0.50
0.46
0.42
140
113
0.64
0.60
0.54
0.49
0.45
0.42
0.38
140
104
0.59
0.55
0.50
0.44
0.41
0.37
0.34
131
122
0.64
0.60
0.54
0.49
0.45
0.42
0.38
131
113
0.59
0.55
0.50
0.44
0.41
0.37
0.34
131
104
0.54
0.51
0.45
0.40
0.36
0.33
0.30
131
95
0.50
0.46
0.41
0.35
0.32
0.29
0.26
122
113
0.54
0.51
0.45
0.40
0.36
0.33
0.30
122
104
0.50
0.46
0.41
0.35
0.32
0.29
0.26
122
95
0.45
0.42
0.36
0.31
0.28
0.25
0.22
122
86
0.41
0.37
0.32
0.27
0.24
0.21
0.18
Room Temperature (°F)

HEAT OUTPUT CORRECTION FACTORS
2. RADIATOR SIZING CONT. 7
3. FLOW RATE & PRESSURE DROP
Flow Rate:
When designing a steel panel radiator system the flow rates should be calculated by heating zone loop. Use the
heat load for each loop and the formula below to find the needed flow rate for each loop .

Flow Rate (gpm) = Heat Load (BTU/H)
500 x T (ºF)
*
*where T (ºF) is the difference between the supply and return temperature to the radiator
Example:
A heating loop with a 25,000BTU/H