Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Webinar Objectives:
1. Control objectives for hydronic systems
2. Review of hydronic fundamental
principals
3. System control and piping strategy for
condensing boilers
4. Introduction to NEW Vitodens 100
Application Guide
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Webinar Objectives:
1. Control objectives for hydronic systems
Review of hydronic fundamental principals
System control and piping strategy for
condensing boilers
Introduction to NEW Vitodens 100
Application Guide
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Objectives for Hydronic Systems
2. Minimize Energy Consumption:
Maximize boiler condensing efficiency
Minimize boiler on/off cycling
Minimize electrical consumption
1. Maximize Occupant Comfort:
Maintain a constant room air temperature
Vary temperatures as occupants desire.
3. Protect Equipment:
Prevent boiler short cycling
Prevent excessive temperature from damaging flooring, tubing, etc.
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il5
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
The Control Challenge
SolarGain
Internal gain:People, equipment lights
Infiltration and wind losses
1. Maintain a constant room temperature, with constantly changing conditions.
Objective:Constant temperature
Heat loss through building envelope
He
at in
put
He
at lo
ss
Heat loss
Outdoor airtemperaturechanges
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il6
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
The Control Challenge
2. Control a multiple function, multiple temperature system.
HeatExchanger
Pool or spaheating
HeatExchanger
Snowmelting High-temp RFHwood sub-floor
Fan coil
DHW
Low-temp RFHconcrete slab
70oF-110oF
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il7
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Webinar Objectives:
1. Overview of control objectives for
hydronic systems
2. Review of hydronic fundamental
principals
System control strategy and component
selection
Piping strategies for condensing boilers
Introduction to NEW Vitodens 100
Application Guide
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il8
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Understanding Hydronic Fundamentals
The Universal Hydronics Formula
Why is this formula important to understand?
Sizing pipes
Sizing pumps
Sizing Low loss headers, zone valve, air scoops, etc
Trouble shooting systems
Controlling heat transfer rates
GPM = BTU/hr ÷ (T x 500)
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il9
, 1
0/2
015
©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Understanding Hydronic Fundamentals
The Universal Hydronics Formula
WHERE:
GPM = Fluid flow rate in gallons per minute
BTU/hr = Heat Loss at design temperature of area being heated
T = Temperature drop across the piping circuit (Typically 10 - 20oF)
500 = 8.33 lb/gal x 60 min/hr x 1 (Specific heat or water - Btu/lb./oF)
GPM = BTU/hr ÷ (T x 500)
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
0,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Understanding Hydronic Fundamentals
The Universal Hydronics Formula
GPM = BTU/hr ÷ (T x 500)
Typical hydronic
system: 20oF
temperature drop
180oF
160oF
GPM = BTU/hr ÷ (20 x 500)
GPM = BTU/hr ÷ 10,000
90,000
BTU/hr
9 GPM
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
1,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Understanding Hydronic Fundamentals
The Universal Hydronics Formula
Controlling the Rate of Heat Output:
Control the flow
Control the water temperature
Rate
of
heat
output
Room thermostat
M
GPM = BTU/hr ÷ (T x 500)
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
2,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Understanding Hydronic Fundamentals
The Universal Hydronics Formula
Rate
of
heat
output
Flow Controls:
On-off (zone valves/pumps)
Balancing
Water temperature controls
Boiler outdoor reset
Mixing valves
Thermostatic
Motorized
Room thermostat
M
GPM = BTU/hr ÷ (T x 500)
Outside air sensor
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
3,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Outdoor Reset Control
Why use it?
2. Efficiency Eliminate overheating
Increases condensing in boiler
Longer boiler run times
Lower standby losses
1. Comfort Consistent, even space temperatures
Constant heat output to match the load
Keep up vs Catch up
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
4,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Outdoor Reset Control
How does it work?
Heat loss changes continuously
with outdoor temperature
Water temperature is varied based
on outside air temperature
Heat output of boiler (or mixing
device) now matches heat loss of
building
15
59
20
68
Outdoor temperatureBoiler
/ supply
wate
r te
mpera
ture
68 20
95 35Tem
p R
ange
20-6
0oC
/ 7
0-1
40
oF
Heating curves
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
5,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Outdoor Reset Control
Controls
03/05Foil 15
Low temp heating system, eg Radiant floor heating
Heating curve selection
Medium temp heating system, eg Cast iron radiation, Staple-up RFH
High temp heating system, eg Fin tube radiation, fan coils
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
6,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Webinar Objectives:
1. Overview of control objectives for
hydronic systems
2. Review of hydronic fundaments
principals
3. System control and piping strategy for
condensing boilers
Piping strategies for condensing boilers
Introduction to NEW Vitodens 100
Application Guide
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
7,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
Where do you start?
1. What are the system water temperature requirements?
Low, medium or high temp emitters
Multiple function, multiple temp systems
DHW heating requirements
2. What are the boilers requirements
High mass / Low mass construction
Minimum / Maximum flow rates
Maximizing condensing efficiency
3. What are the zoning requirements?
Areas experiencing solar gain or internal heat gains
Areas with different use patterns
Night or weekend temperature setback
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
8,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
1. Typical hydronic emitters water temperature requirements
Low temperature emitters:
High mass radiant floor
ie: concrete floors 80 - 120 oF
Snowmelting systems 80 - 120 oF
Medium temperature emitters:
Cast iron radiators 100 - 140 oF
Low mass radiant floor
ie: wood joist floors 100 -150 oF
High temperature emitters:
Finned tube baseboard 140 - 190 oF
Air heat fancoils 140 - 180 oF
Pool/spa heat exchangers 160 - 180 oF
DHW production 150 - 190 oF
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il1
9,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Temperature
How do you maximize the efficiency of condensing boiler?
140oF
120oF
80
82
84
86
88
90
92
94
96
16014012010080
130oF Dew Point of Natural Gas
Condensingmode
Non-Condensingmode
Bo
iler
effic
ien
cy %
Boiler return water temp oF
98
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
0,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Construction
Vitodens 100 / 200 series:
Low mass HX construction
Low water content
Minimum and Maximum flow rate requirements
Higher friction loss through heat exchanger
Maximum boiler temperature limitations (= 167oF or 176oF)
Vitocrossal 300, CU3A series:
High mass HX construction
High water content
No Minimum flow rate requirements
Lower friction loss through heat exchanger
Maximum boiler temperature limitations (= 194oF)
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
1,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Piping
Vitodens 100 / 200 series:
To avoid short cycling, flow must be maintained
Dedicated boiler pump usually required
Primary-secondary piping usually required
Closely spaced tees or
Low loss header
Vitocrossal 300, CU3A series:
Not flow sensitive
Dedicated boiler pump not required
Primary secondary not required
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
2,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Piping
Primary-Secondary
piping
Piping directly to
system
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
3,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Hydraulic separation with Primary-Secondary Piping
Option 1:
Closely spaced TeesOption 2:
Low Loss Header
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
4,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Hydraulic separation with Primary-Secondary Piping
This pump only has to
over come the friction
loss of the boiler and
primary loop piping
This pump only has to
over come the friction loss
of the heat emitters and
secondary loop piping
Primary
Loop
Secondary
Loop
Happy boiler:
Always gets the flow it needs
Less likely to short cycle
Not affected by on/off zones
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
5,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
2. Boiler requirements – Low Loss Header operation
PrimarySecondary
Primary flow higher
than secondary flow
PrimarySecondary
Mixing occurs within the hydraulic separator.
Secondary flow higher
than primary flow
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
6,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
3. Zoning requirements
Multiple zone pumps
Higher electrical consumption
Flow balance with speed control
Thermostatically controlled zone pumps
Multizonecontrol
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
7,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
3. Zoning requirements
Single pump, multiple zone valves
Lower electrical consumption
Individual loop control for RFH
With single speed pump use pressure
bypass valve to balance flow
Pressure bypass valve
Thermostatically controlled zone valves
M M M
Multizonecontrol
Single speed pump
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
8,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
3. Zoning requirements
Single pump, multiple zone valves
Lower electrical consumption
Individual loop control for RFH
Variable speed pump to balance flow
Variable speed pump
Thermostatically controlled zone valves
M M M
Multizonecontrol
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il2
9,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Control Strategy And Component Selection
Time to start designing!
1. System water temperature requirements
Separate heating circuits by temperature
Use mixing valves to satisfy lower
temperatures
2. Boilers requirements
Size boiler to match heating load
Pick piping strategy to meet boiler
construction
3. What are the zoning requirements?
Add zone controls to meet zoning demands
of building
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
0,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Webinar Objectives:
1. Overview of control objectives for
hydronic systems
2. Review of hydronic fundaments
principals
3. System control and piping strategy for
condensing boilers
4. Introduction to NEW Vitodens 100
Application Guide
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
1,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide
First module for Vitodens 100 introduced in
November 2015
Installer / Designer assistance for:
Component selection
Hydronic piping layouts
Wiring diagrams
Control Programing / coding
Design tips
Future modules – Vitodens 200, Vitodens 222-F
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
2,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Boiler Nomenclature
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
3,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Recommended Product Application
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
4,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Component Index
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
5,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Piping Layouts
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
6,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Wiring Layouts
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
7,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Set-up and Programming
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
8,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Application # 1
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il3
9,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Application # 2
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
0,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Application # 3
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
1,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Application # 4
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
2,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Application # 5
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
3,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide – Application # 6
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
5,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide Phase 2 – Vitodens 200 piping
Motorized
mixing
valve
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
6,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide Phase 2 – Vitodens 200 piping
Motorized
mixing
valves
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
7,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
Applications and Piping Strategies for Condensing Boilers
Application Guide Phase 2 – Vitodens 200 piping
Ap
plic
atio
ns a
nd
Pip
ing
Str
atig
ies
Fo
il4
8,
10
/20
15 ©
Vie
ssm
an
n M
an
ufa
ctu
rin
g
For More Information…
1. Contact your local Viessmann Sales Representative
2. Download literature and technical manuals by going to
the ProLogin section of the Viessmann website:
http://www.viessmann.ca/en/Residential/Downloads/Ma
nuals.html
3. Get more training at one of our in-depth 1 or 2-day
Academy seminars. Go to the Academy section of the
Viessmann website for the full schedule of all our in-
house training.