Weil-McLain SVF 500 Setup guide

C
F
C
C
C
Models 500 / 600
Commercial Condensing
Gas-Fired Water Boilers
Advanced Manual
Manual Part Number 550-100-207/1023
!
WARNING
Installation and service of the boiler must be performed by a qualied installer or service technician.
Read all instructions, including this manual and all other information shipped with the boiler, before
installation or operation. Perform steps in the order given. Failure to comply can result in severe
personal injury, death or substantial property damage.

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .2
 
Safety Signals . . . . . . . . . . . . . . . . . . . . . . . . . .3
Please Read Before Proceeding . . . . . . . . . . . . . . . .3
Servicing a Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Boiler Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Boiler Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Commonwealth of Massachusetts . . . . . . . . . . . . . . . . . . . 4
Freeze Protection Fluids . . . . . . . . . . . . . . . . . . . . . . . . 4
Damage from Water Contact. . . . . . . . . . . . . . . . . . . . . . 4
Frozen Water Damage . . . . . . . . . . . . . . . . . . . . . . . . . 4
 
Multiple Boiler Installations. . . . . . . . . . . . . . . . . . . 5
Placing Multiple Boilers . . . . . . . . . . . . . . . . . . . . . . . . 5
Manifolded Combustion Air Option. . . . . . . . . . . . . . . . . . . 5
Easy-Fit™ Piping Installation . . . . . . . . . . . . . . . . . . . . . . 6
EXPRESS SETUP Requirements . . . . . . . . . . . . . . . .8
Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . 9
Control Priorities & Input/Outputs . . . . . . . . . . . . . . . . . . . 9
Boiler circulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Control operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Outdoor reset operation . . . . . . . . . . . . . . . . . . . . . . . 10
Remote target operation (0–10VDC input). . . . . . . . . . . . . . 10
Remote modulation operation (0–10VDC input) . . . . . . . . . . . 11
Variable Speed Boiler Pumping (0–10VDC output) . . . . . . . . . 11
EXPRESS SETUP Steps. . . . . . . . . . . . . . . . . . . . 13
EXPRESS SETUP Wizard . . . . . . . . . . . . . . . . . . .14
EXPRESS SETUP Single Boilers — Example A . . . . . . .19
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 20
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 20
EXPRESS SETUP Single Boilers — Example B . . . . . . .22
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 22
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 23
EXPRESS SETUP Multi-Boilers — Example A . . . . . . . . 25
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 25
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 26
EXPRESS SETUP Multi-Boilers — Example B. . . . . . . . 28
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 28
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 29
EXPRESS SETUP Multi-Boilers — Example C. . . . . . . . 32
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 33
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 33
EXPRESS SETUP Multi-Boilers — Example D. . . . . . . . 37
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 38
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 38
EXPRESS SETUP Multi-Boilers — Example E. . . . . . . . 41
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 41
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 42
EXPRESS SETUP Multi-Boilers — Example F . . . . . . . . 45
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Control Setting Notes . . . . . . . . . . . . . . . . . . . . . . . . 46
Circulators and Piping . . . . . . . . . . . . . . . . . . . . . . . . 46
 
Electrical – General . . . . . . . . . . . . . . . . . . . . . .51
Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . 51
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Terminal Connections . . . . . . . . . . . . . . . . . . . . . . . . 52
Wiring Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Wire Entrances. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Wire Routing in the Cabinet . . . . . . . . . . . . . . . . . . . . . 52
Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 54
Ladder Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Terminal Block Wiring . . . . . . . . . . . . . . . . . . . . . . . . 58
Zoning with the Control . . . . . . . . . . . . . . . . . . . . 66
 
Control Setup and Operation . . . . . . . . . . . . . . . . . 69
Control Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Multiple Boiler Operation . . . . . . . . . . . . . . . . . . .69
Control Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Essential Control Settings . . . . . . . . . . . . . . . . . . . . . . 71
Control Settings Menus . . . . . . . . . . . . . . . . . . . . . . . 72
Available Control Settings and System Presets. . . . . . . 73
NAVIGATION Menus . . . . . . . . . . . . . . . . . . . . . . 75
CONTRACTOR Menus. . . . . . . . . . . . . . . . . . . . . 77
Accessing Contractor Menus . . . . . . . . . . . . . . . . . . . . 77
Service Menu Section . . . . . . . . . . . . . . . . . . . . . . . . 77
BOILER SETTINGS Menus . . . . . . . . . . . . . . . . . . 78
Boiler Settings Menus Navigation . . . . . . . . . . . . . . . . . . 78
PUMP SETTINGS Menus . . . . . . . . . . . . . . . . . . . 79
NETWORK SETTINGS Menus. . . . . . . . . . . . . . . . . 80
ROTATION AND SEQUENCE . . . . . . . . . . . . . . . . . 81
SYSTEM SETTINGS Menus . . . . . . . . . . . . . . . . . . 83
System Settings Menus Navigation . . . . . . . . . . . . . . . . . 83
Boiler PRIORITY Menus . . . . . . . . . . . . . . . . . . . . 84
AUX Pump/Output . . . . . . . . . . . . . . . . . . . . . . . 88
Primary Valve Control . . . . . . . . . . . . . . . . . . . . . 89
DIAGNOSTICS Menu . . . . . . . . . . . . . . . . . . . . . 90
SERVICE Menus . . . . . . . . . . . . . . . . . . . . . . . . 92
SERVICE INFO . . . . . . . . . . . . . . . . . . . . . . . . . 92
Additional Instructions . . . . . . . . . . . . . . . . . . . .92
Abbreviation Description
AHD Additional Heat Demand
AMP Ampere or Amperage
ANSI American National Standards Institute
BMS Building Management System
BTUH British Thermal Unit per Hour
CAD Combustion Air Damper
CH Comfort Heat
CP Consumer Protection
CSA Canadian Standards Association
DHW Domestic Hot Water
LWCO Low Water Cut-O󰀨
MBH Thousands of Btuh
NFPA National Fire and Protection Agency
ODT Outdoor Temperature
P/T Pressure and Temperature
VAC Volts Alternating Current
VDC Volts Direct Current
WWSD Warm Weather Shut Down
Table 1 Common abbreviations
2550-100-207/1023
     
Contents
Abbreviations

3550-100-207/1023
     
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2
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8
This section is intended to provide safety information.
Section Contents
Safety Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Please Read Before Proceeding . . . . . . . . . . . . . . . . . . . . 3

The following dened terms are used throughout this
manual to bring attention to the presence of hazards
or other important information.
DANGER
!
Danger indicates the presence of hazards that
will result in severe personal injury, death, or
substantial property damage.
!
WARNING
Warning indicates the presence of hazards that
can result in severe personal injury, death, or
substantial property damage.
CAUTION
!
Caution indicates the presence of hazards that
will or can result in minor personal injury or
property damage.
NOTICE
Notice indicates additional information that may be
related to property damage, but is not related to
personal injury.
IMPORTANT
Important indicates additional information that is
important, but is not related to personal injury or
property damage.

!
WARNING
Adhere to all following guidelines and
instructions in this section. Failure to adhere to
these guidelines can result in severe personal
injury, death, or substantial property damage.
IMPORTANT
Any claims for damage or shortage in shipment
must be led immediately against the transportation
company by the consignee.
Servicing a Boiler
• To avoid electric shock, disconnect all electrical
supplies to the boiler before performing maintenance.
• To avoid severe burns, allow boiler to cool before
performing maintenance.
• This boiler contains ceramic ber and berglass
materials. Refer to the warnings and instructions in
the boiler manual (part number 550-100-273).
Boiler Operation
• Do not block ow of combustion or ventilation air
to boiler.
• Should overheating occur, or gas supply fail to
shut o󰀨, do not turn o󰀨 or disconnect electrical
supply to pump. Shut o󰀨 the gas supply at a
location external to the appliance.
(continued on the next page)

Safety

4550-100-207/1023
     
1
2
3
4
5
6
7
8
Boiler Water
• Since the heat exchanger is made of stainless
steel, the water chemistry must be checked. The
system pH must be in the range of 7.0 to 8.5.
Chemical treatment may be required. See the boiler
manual (part number 550-100-273) for details.
• Before connecting the boiler, thoroughly ush the
system to remove sediment. Install a strainer or other
sediment removal equipment if necessary. The high-
e󰀩ciency heat exchanger can be damaged by build-
up or corrosion due to sediment.
• Do not use petroleum-based cleaning or sealing
compounds in the boiler system. Gaskets and seals
in the system may be damaged, which can result in
substantial property damage.
• Continual fresh make-up water will reduce boiler
life. Mineral buildup in the heat exchanger reduces
heat transfer, overheats the stainless steel heat
exchanger, and causes failure. Addition of oxygen
carried in by make-up water can cause internal
corrosion. Leaks in the boiler or piping must be
repaired at once to prevent make-up water. Use
this boiler ONLY in a closed-loop system.
• Do not add cold water to a hot boiler. Thermal
shock can cause the heat exchanger to crack.
!
WARNING
Boiler Model, Altitude and Fuel Type are critical
settings. Failure to set these correctly can result
in severe personal injury, death, or substantial
property damage.
Commonwealth of Massachusetts
When the boiler is installed within the Commonwealth
of Massachusetts:
• This product must be installed by a licensed
plumber or gas tter.
• If antifreeze is used, a reduced pressure back-ow
preventer device shall be used.
See the boiler manual for sidewall vent air
installations.
Freeze Protection Fluids
NEVER use automotive or standard glycol antifreeze,
including glycol made for hydronic systems. Use only
freeze-protection uids recommended in boiler manual.
See the boiler manual for more information. Thoroughly
clean and ush any replacement boiler system that has
used glycol before installing the new SVF boiler.
Damage from Water Contact
DANGER
!
DO NOT attempt to operate any boiler if any
part of the boiler, burner, or controls has been
partially or fully sprayed with or submerged
under water. The boiler must either be replaced
or completely repaired and inspected. The boiler
and all components must be in good condition
and fully reliable before operation.
If these requirements are not met, operating
the boiler will cause re, explosion, and electrical
shock hazards, leading to serious injury, death,
or substantial property damage.
Saltwater damage: The immediate e󰀨ects of
saltwater damage are like those of freshwater,
with electrical components shorting out and the
removal of critical lubricants. However, salt and other
contaminants left behind can lead to long term issues
due to the conductive and corrosive nature of salt
residue. WM Technologies equipment contaminated
with saltwater or polluted water will no longer be
covered under warranty and should be replaced.
Electrical damage: If any electrical component or
wiring has, or is suspected to have come into contact
with water, replace the boiler.
Frozen Water Damage
Power outages, unattended residences or buildings,
boiler component failures, or other electrical system
failures in cold weather can result in frozen plumbing
and water damage in a matter of hours. Consult with
a boiler contractor or a home security agent to take
preventative actions, such as installing a security
system that operates during power outages, senses
low temperature, and initiates an e󰀨ective action.


5550-100-207/1023
     
1
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Section Contents
Multiple Boiler Installations. . . . . . . . . . . . . . . . . . . . . . . 5
EXPRESS SETUP Requirements . . . . . . . . . . . . . . . . . . . 8
EXPRESS SETUP Steps . . . . . . . . . . . . . . . . . . . . . . 13
EXPRESS SETUP Wizard . . . . . . . . . . . . . . . . . . . . . . 14
EXPRESS SETUP Single Boilers — Example A. . . . . . . . . . . 19
EXPRESS SETUP Single Boilers — Example B. . . . . . . . . . . 22
EXPRESS SETUP Multi-Boilers — Example A . . . . . . . . . . . 25
EXPRESS SETUP Multi-Boilers — Example B . . . . . . . . . . . 28
EXPRESS SETUP Multi-Boilers — Example C . . . . . . . . . . . 32
EXPRESS SETUP Multi-Boilers — Example D . . . . . . . . . . . 37
EXPRESS SETUP Multi-Boilers — Example E . . . . . . . . . . . 41
EXPRESS SETUP Multi-Boilers — Example F . . . . . . . . . . . 45

Placing Multiple Boilers
1. Locate multiple boilers with spacings shown in
Figure 1. Provide the indicated clearances around
boilers for access and servicing.
!
WARNING
If recommended dimensions are not possible,
provide at least the minimum clearances in the
boiler manual and follow local codes. Failure to
comply can result in severe personal injury, death,
or substantial property damage.
2. If the boiler room oor is uneven or there is a
danger of ooding, construct a boiler foundation.
Size the foundation to allow for clearance and
spacing dimensions shown in Figure 1.
3. Provide a minimum 24" walkway in front of the
boilers to ensure accessibility.
4. Uncrate, assemble, and mount boilers according
to instructions in the SVF 500/600 boiler manual.
5. Provide clearances needed for installation
of venting, air piping, gas piping, expansion
tank, primary circulator, and other accessories.
Clearances must comply with all applicable codes.
Figure 1 Side-by-side mounting of multiple SVF boilers
230166
0ʺ*
or
24ʺ**
0"*
24"**
24-7/8ʺ
0ʺ* or 24ʺ**
*Min allowable for service
**Recommended setup
Figure 2 Manifolded combustion air option
12" min
Grade or
snow line
Minimum 3 feet below any
vent termination within 10 feet
Air duct
230167
Air
Vent
Air
Vent
Air
Vent
Manifolded Combustion Air Option
1. Multiple SVF boilers can use a common
combustion air manifold.
a. Provide minimum clearance to adjacent vents
and grade/snow line as shown in Figure 2.
b. Provide minimum free area in duct (adjusted
for louver restriction) of 1 square inch per
2,000 Btuh total boiler input. See the following
steps. Also see information in Boiler Ratings
section of boiler manual.
c. If a combustion air damper is used, wire to
boilers to prevent operation, except after
damper has opened.
(continued on the next page)



6550-100-207/1023
     
1
2
3
4
5
6
7
8

Manifolded Combustion Air Option, cont.
!
WARNING
ONLY air piping can be combined. DO NOT use
combined vent piping as ue gas leakage and
boiler component damage can occur. Failure
to comply can result in severe personal injury,
death, or substantial property damage.
2. Calculate the required cross sectional area of the
combined combustion air duct for area in square
inches:
MINIMUM DUCT AREA
= TOTAL MBH INPUT DIVIDED BY 2
a. Example: A multiple boiler system with three
SVF 500 boilers has a total input of 3 x 500 =
1500 MBH (1,500,000 Btuh). The required duct
cross sectional area would be:
MINIMUM DUCT AREA
= 1500 DIVIDED BY 2
= 750 sq. inches
Easy-Fit™ Piping Installation
1. Main header and Easy-Fit manifold pipe sizing.
a. Size system piping as required for the ow.
b. Install tees on the system piping for Easy-Fit
manifolds as shown in Figure 3 or Figure 4.
Size manifolds to handle total connected boiler
output as shown.
2. Provide connections in main header for Easy-Fit
manifolds as close as possible to the midpoint of
multiple boilers.
a. Use tees for four or less boilers, as in Figure 3.
b. Use either tees (Figure 3) or crosses (Figure 4)
for ve or more boilers.
3. Manifold placement:
a. To alternate spacing for supply and return lines
to boilers, reverse the short-end and long-end
of the manifolds as shown in Figure 3 and
Figure 4 on page 6.
b. The return manifold must be on the return side
of the main. The supply manifold must be on
the supply side of the main. Drawings in this
manual show ow in system main from right to
left. For system owing left to right, reverse the
locations of the manifolds accordingly.
Figure 3 Single-sided Easy-Fit header connection
230168
Weil-McLain
™
Easy-Fit
Manifold
Weil-McLain
™
Easy-Fit
Manifold
2-4 boilers:
1 manifold
5-8 boilers:
2 manifolds
2-4 boilers:
1 manifold
5-8 boilers:
2 manifolds
Tee
(by others)
Couplings
(by others)
Cap
(by others)
8 pipe diameters max
MainMain
short
end
long
end
short
end
long
end
(or as close as practical)
Figure 4 Double-sided Easy-Fit header connection
230169
8 pipe
diameters max
(or as close
as practical)
Main Main
short
end
long
end
short
end
long
end
Caps (by others)
Caps (by others)
Cross/bushing
(by others)
Cross/bushing
(by others)
Weil-McLain
™
Easy-Fit
Manifold
Weil-McLain
™
Easy-Fit
Manifold
4. Maximum connected load per manifold:
a. 3-inch manifold = 1400 MBH
b. 4-inch manifold = 2900 MBH
IMPORTANT
It is recommended to pipe to boilers such that the
rst boiler connection o the return manifold is piped
to the furthest connection on the supply manifold
from the main header. See Figure 5, page 7 for
examples.
5. Connect from Easy-Fit manifold branches to
boiler supply and return connections using copper
or steel pipe, sized for the required ow rate.

Figure 5 Piping schematic - typical piping for multiple SVF boilers using Weil-McLain Easy-Fit manifolds. Adjust boiler
connections as required for other boiler models.
21
2
20
Boiler
In
Boiler
Out
18
22
Long
end
Long
end
Do not exceed
8 pipe diameters
apart
230170
7
211
12
10
8
16 9 13 19 19
4
5
3
17
111
21
2
20
Boiler
In
Boiler
Out
18
22
1
ReturnSupply
6
21
2
20
Boiler
In
Boiler
Out
18
22
21
2
20
Boiler
In
Boiler
Out
18
22
22 22 22 22
2
15
2
3
15 15 15
2 2 2
3 3 3
Legend – Figure 5
1. Flow/check or spring check valve
2. Isolation valves
3. Strainer (recommended on each boiler on return
line) (Not shown)
4. Easy-Fit Manifold (supply) — layout and size per
page 6
5. Easy-Fit Manifold (return) — layout and size per
page 6
6. Primary circulator
7. Expansion tank (diaphragm type)
8. System air eliminator
9. System automatic air vent
10. Pressure reducing valve
11. Check valve or back ow preventer, as required by
applicable codes
12. Cold water supply
13. Supply water temperature control (when used)
14. Water ow switch (when used) — locate a ow
switch in each boiler loop if individual protection is
required (Not shown)
15. Boiler circulator
16. System supply
17. System return
18. Boiler P/T gauge, installed per the SVF 500/600
boiler manual
19. Install system supply and return sensors to lines as
shown, at least 6 pipe diameters (but no more than 3
feet) from boiler connection tees
20. Boiler drain valves
21. Relief valve and discharge piping, installed per the
SVF 500/600 boiler manual
22. Unions (recommended)
7550-100-207/1023
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Easy-Fit™Piping Installation, continued
6. Install an isolation valve on the supply and return
of each boiler as shown in the piping diagrams in
this manual. Some local codes may require the
use of individual water level controls and limits on
each boiler because isolation valves are installed.
7. Install main system air eliminator and primary
circulator in supply piping as shown in piping
diagrams. Place expansion tank on suction side
of system circulator as shown.
8. Install system accessories as shown in the gures.
9. Piping recommendation illustrations are as shown.
If desired, other primary/secondary piping
arrangements can be used:
a. Figure 3 and Figure 4 show details of Easy-Fit
manifolds.
b. Figure 5 is a schematic piping drawing showing
the locations of typical boiler piping and system
piping, including limits and other devices often
required by local codes.
c. Figure 13, page 25 and Figure 14, page 28
are three dimensional piping drawings of typical
multiple boiler installation.
d. Figure 15, page 32 shows recommend piping
when an isolation heat exchanger is needed.

8550-100-207/1023
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8
Control Features
Advanced interface and troubleshooting via
Bluetooth®communication.
Color touch-screen display for ease of operation
monitoring and troubleshooting.
Easy conguration with WIZARD step-by-step
setup including on-screen help.
The control can communicate to existing Unity™
controls in a multi-boiler network.
Three (3) programmable priority assignments for
up to four (4) heat inputs.
Preset operating parameters for typical heating
systems, including target temperatures, reset
curves and circulator assignments.
Integral outdoor reset option, with reset curves
matched to the system type selected.
ModBus communications for external
communication and monitoring.
0-10VDC input modulation or remote target
input.
Up to four (4) congurable outputs, including one
(1) internal boiler circulator output.
Additional heat demand operation to call a
second heat source to help supply the energy
required for heating.
Advanced PI response to anticipate system
needs.
Flue temperature modier to target temperature.
Modulation based on ue sensor, Boiler out,
DHW Flow sensor and DHW sensors.
Dual temperature sensors on boiler outlet, DHW
outlet and ue, providing redundant protection.
Boiler is shipped with an outdoor sensor.
Blower speed modulation to control boiler ring
rate.
Alarm relay on error/fault for use with an audible
safety.
Blower calibration – allows ne tuning of blower
control to reach purge speeds faster, reducing
time to heat delivery.
Temperature units – Select between using °F or
°C.
Manual Reset High Temperature Limits – Set
High Limit temperature safety value.
Daylight Saving Time – Select whether your
boiler will obey Daylight Savings Time for your
region.
Figure 6 Control sequence of operation
Display
status text
Control action
(Also see Figure 23, page 71)
POWER
UP
• Check the boiler model listed on the power-up screen.
If it is not correct, turn o the boiler. See page78 for
instructions to change setting.
• When power is turned on, the screen lists sensors that
are detected. If any sensor is not listed, make sure it is
connected correctly. Turn o power and restart.
Standby
• Standby - no calls for heat.
• Toggles through no dots, 1 dot, 2 dots, then 3 dots while in
standby (wrench symbol will show instead if maintenance
is needed).
Blower
ON
• Call for heat detected.
• Display on with BLUE banner (space heating) or PURPLE
banner (DHW).
• Start min/max timers if more than one system is calling -
highest priority starts rst.
• Start circulators for this priority setup based upon settings.
• Calculate target temp — If sensor temp is below target
temp, begin ring sequence.
• Blower to ignition speed for prepurge.
Ignition
• Aer prepurge times out, begin ignition cycle.
• Activate gas valve and ignition spark.
• Continue ignition spark for ignition period.
• Turn o spark and use electrode to check for ame signal.
Space
Heating
• Flame detected.
• Release boiler to modulation.
• NOTE: If ame is not detected, the gas valve is turned o,
blower turns on (postpurge), and control starts cycle again.
Aer 5 failures, the control waits 60 minutes, then tries
again.
• If priority timer times out, switch to next priority and start
priority timer.
• If demand satised, go to postpurge.
DHW
Heating
• Flame detected.
• Release boiler to modulation.
• NOTE: If ame is not detected, the gas valve is turned o,
blower turns on (postpurge), and control starts cycle again.
Aer 5 failures, the control waits 60 minutes, then tries
again.
• If priority timer times out, switch to next priority and start
priority timer.
• If demand satised, go to postpurge.
Blower
OFF
• Demand satised (temperature reaches target temperature
or limit setting).
• Gas valve o.
• Blower to ignition speed for postpurge.
• Return to standby aer purge.
Maintenance
• Display banner turns BLUE, toggling between graphic
screen and maintenance screen (occurs if maintenance
schedule timer times out).
• Will show during standby only.
• Boiler operates as normal.
Error/fault
• Display banner turns RED due to error or limit event.
WWSD
• Warm weather shut down - the boiler will not be allowed
to re on space heating if the outdoor temperature is
greater than the WWSD setting.
• DHW operation is not aected by WWSD.


9550-100-207/1023
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8
Sequence of operation
Figure 6, page 8 is a summary of the operating
sequence for the control.
• The statuses shown appear in the display as the
control cycles the boiler.
• The display banner will be red if a problem has
been detected.
Control Priorities & Input/Outputs
For heating installations with multiple systems, the
control uses PRIORITIES to determine the order of
operation of the systems.
• The control’s MAX and MIN time settings
determine the maximum and minimum times a
system will be operated before being turned o󰀨 to
allow another system to operate.
• A typical example is DHW priority — heat demand
from the DHW system is given preference over
space heating, if set to use Priority 1.
• The MAX ON TIME setting controls the maximum
time a priority will be allowed to run before
switching to a lower priority’s call for heat.
• The MIN ON TIME setting controls the minimum
time a priority will be operated before switching to
a higher priority’s call for heat, or the next lower
priority.
• Each PRIORITY has its own set of operating
parameters.
• The control prompts the user to select the system
type (nned tube baseboard, DHW, etc.) and is
factory programmed with parameters suited to each
of these system types.
• The user can also choose CUSTOM to create a
system type.
• The 120VAC power output to the boiler circulator
is provided by the boiler’s control board.
• The control provides up to three (3) priorities for
single boiler applications and up to four priorities for
network boiler applications. The order of operation
is:
• Single boilers: PRIORITY 1, PRIORITY 2,
PRIORITY 3.
• Network boilers: LOCAL PRIORITY 1,
NETWORK PRIORITY 1, NETWORK
PRIORITY 2, LOCAL PRIORITY 2.
• For each boiler in a network, this provides up to
two (2) local priorities, used for heating systems
piped directly to the boiler, such as DHW tanks.
• Network priorities are used for heating systems
connected in the primary heating loop and supplied
by the boiler network.
• Each boiler has up to four (4) input/output pairs
(INPUT/OUTPUT 1, 2, 3 and 4).
• Control setup prompts the user to assign each of
these I/O pairs to a PRIORITY. The control then
knows which system (priority) to operate when the
input receives a call for heat. On a call for heat
to an input, the control closes the corresponding
output (120VAC) and begins controlling the boilers
according to the setup for the assigned priority.
• When multiple inputs are set up on the same
priority, they will run at the same time if the priority
and inputs are active.
Boiler circulator
• The boiler circulator must be supplied by others.
• The 120VAC Output for the boiler circulator is
located on the terminal strip located in the Control
Panel. For each of the priorities, the control can be
setup to run the boiler pump or to leave it o󰀨. It is
recommended to set Boiler Circulator to OFF for
directly piped DHW systems with its own circulator.
!
WARNING
The boiler circulator must be installed and
connected. Flow through the boiler must be
provided during all times of operation. Failure to
do so can result in severe personal injury, death
or substantial property damage.
Control operation
The control responds to signals from:
• Room thermostats.
• DHW aquastats (if used).
• Temperature sensors Boiler Out, Boiler In, ue
temperature and when used, outdoor temperature.
• It is required to install System Supply and Return
sensors for proper design operation.
• The control automatically adjusts blower speed to
match boiler output to heating demand.
• The control provides up to four (4) inputs and four
outputs (for circulators or auxiliary devices) plus a
fth (5) boiler circulator output based on selected
boiler model.
• Outdoor reset are recommended to be used in all
application.
• The outdoor temperature is used for supply
temperature reset operation and for the warm
weather shutdown (WWSD) option.
• See "Outdoor reset operation" on page 10 for
complete explanation of outdoor reset settings.
• System presets:
The control provides presets by system type for
complete list, see Table 12, page 74.

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OUTDOOR TEMP FOR MIN TARGET
1. OUTDOOR TEMP FOR MIN TARGET means
the outdoor temperature at which the target
temperature reaches its minimum (Min Target
Temp).
2. In the examples of Figure 7, this occurs at 70°F
(the factory default).
OUTDOOR TEMP FOR MAX TARGET
1. OUTDOOR TEMP FOR MAX TARGET means
the outdoor temperature at which the target
temperature reaches its maximum value (Max
Target Temp).
2. In the examples of Figure 7, this occurs at 0°F
outdoor (the factory default setting).
3. OUTDOOR TEMP FOR MAX TARGET should
equal the Outdoor Temp (outdoor design
temperature) for the installation’s location.
Outdoor reset operation
1. Set desired temperatures for space heating
zones.
2. For an explanation of the target temperatures and
associated outdoor temperatures, see Figure 7.
3. The temperature settings discussed below are
accessed in the priority menu for the applicable
system. For detailed explanations of the priority
menus, see Figure 34, page 84.
MAX TARGET TEMP
Set Max Target Temp to the required supply water
temperature for the system at design maximum heat
loss (typically 180°F for nned tube baseboard on
new installations).
MIN TARGET TEMP
1. Min Target Temp should equal the desire
minimum supply water temperature for the
system.
2. The Min Temp is the setpoint whenever the ODT
temp is above the ODT For Min Target and below
the WWSD temps.
NOTICE
Setting this value below the Outdoor Temp for Min
Target may reduce the performance of the heating
system at warmer outdoor temperatures.
3. This could be set as low as 60°F, which would
supply “zero heat” when outdoor temperature is
70°F, because supply water temperature would
close to room temperature. See examples in
Figure 7.
Figure 7 Outdoor reset operation
Figure 8 Remote target operation
Remote target operation (0–10VDC input)
1. This function allows a remote analog input to
regulate the supply temperature for control
operation/modulation. This can be done for any
priority.
2. The settings discussed below are accessed in
the Priority menu for the applicable system. For
detailed explanations of the Priority menus, see
Figure 34, page 84.


11550-100-207/1023
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1
2
3
4
5
6
7
8
3. See Figure 8 for an explanation of target
temperature vs voltage when using remote target
operation.
4. In the priority menu for the applicable system,
select 0-10V for the TARGET ADJUST setting.
5. In the same priority menu, select the VOLTS FOR
MIN TARGET and VOLTS FOR MAX TARGET
values. VOLTS FOR MIN TARGET sets the
voltage value for the desired minimum supply
temperature. VOLTS FOR MAX TARGET sets the
voltage value for the desired maximum supply
temperature.
Remote modulation operation (0–10VDC
input)
1. To use 0-10VDC for remote modulation, go to
Contractor Menu -> System Settings -> select
the appropriate priority. Select Input 2 from
System Setting menu, then change Input 2’s
source to 0-10V. The priority that is assigned to
Input 2 cannot be used by any other Input. Only
applicable for Single boilers. Network cannot use
0-10V remote modulation.
2. The boiler comes on at 0.9VDC and turns o󰀨 at
0.6VDC. 1 VDC = 10% input. 10VDC = 100%
input. These voltage settings are adjustable.
Variable Speed Boiler Pumping (0–10VDC
output)
1. Control Setup – Variable Speed Boiler Pump.
a. 0-10VDC Output functionality allows for control
of a variable speed boiler pump.
b. Connect the output to 0-10VDC input of the
pump. See page 64 for more details.
c. From the Contractor menu, navigate to
Diagnostics -> Manual Test Mode. See Figure
9, page 11. With FORCE RATE highlighted,
select <EDIT> then use the arrows to force to
<HIGH> and press <SAVE>.
d. Adjust the desired voltage to the desired delta T
on the boiler and <SAVE AS MAX VOLTS>,
Change the Pump Volts setting to AUTO to edit
FORCE RATE again. Repeat for each FORCE
RATE speed. Ignition speed rate sets voltage
delivered to the pump when the burner is not
active.
2. Operation – Variable Speed Boiler Pump. See
page 79 for more details.
a. VARIABLE SPEED MAX RATE VOLTS is
desired voltage delivered to the pump when at
high re.
b. VARIABLE SPEED MAX RATE VOLTS is
desired voltage delivered to the pump when at
low re.
c. VOLTS WHEN BURNER OFF is desired
voltage delivered to the pump when the burner
is not active.
d. When the burner is active, the voltage output
scales based on the boiler rate and the
constrains of VARIABLE SPEED MIN/MAX
RATE VOLTS.
Figure 9 Manual test mode screen
MANUAL TEST MODE
STATUS: RUNNING
INPUTS: 1
MODULATION: SYS SUPPLY
BOILER OUT: 165-F
BOILER IN: 138-F
SYSTEM SUPPLY: 154-F
SYSTEM RETURN: 112-F
FLUE: 165-F
OUTDOOR TEMP: OPEN
BLOWER SIGNAL: 43%
BLOWER SPEED: 3976 RPM
FLAME SIGNAL: 3.2
FORCE RATE: HIGH
PUMP VOLTS: 10.0
EDIT
SAVE AS
MAX VOLTS EDIT

12 550-100-207/1023
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4
5
6
7
8
SVF 500
Minimum
Water
Pressure GPM
100% Rate
Temp Rise
(°F)
Boiler Head
Loss (Feet
w.c.)
10 PSI
48 20 7.5
38 25 4.7
32 30* 3.5
27 35 2.8
24 40*** 2.3
21** 45*** 2.1
SVF 600
Minimum
Water
Pressure GPM
100% Rate
Temp Rise
(°F)
Boiler Head
Loss (Feet
w.c.)
10 PSI
57 20 11.9
46 25 6.8
38 30* 4.7
33 35 3.6
29 40*** 3.0
25** 45*** 2.5
* Suggest design ow rate (30°F temp, rise, water only)
** Minimum Flow Rates (GPM):
SVF 500: High Fire = 21, Low Fire = 4
SVF 600: High Fire = 25, Low Fire = 4
***Temp Rises above 35°F are not recommended in high temp.
systems; larger Boiler Out on/o󰀨 Di󰀨's maybe required for
proper operation
Notice: Boilers are designed to reduce ring rate when
di󰀨erential temperature reaches 50°F. When using boiler in a
modulating ow, the minimum allowable water ow rate during
low re operation is 4 GPM. The variable speed pump must
control ow between minimum and full rate in accordance with
ring rate. See Faults and Action Items in boiler Manual, page
122.
Sch 40 Pipe
Diameter
Maximum
Flow Rate
GPM
SCH 40 Pipe
Diameter
Maximum
Flow Rate
GPM
2 45 5 500
3 140 6 800
4 290 8 1650
Figure 10 Pressure drop versus ow rate for SVF boilers
0
5
10
15
20
25
30
35
40
0 10 20 30 40 50 60 70 80 90
P
r
e
s
s
u
r
e
D
r
o
p
(
f
t
)
Flow (gpm)
SVF 500/600: Pressure Drop vs. Flow
Pressure Drop (ft)
230080
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
Mechanical
• Install boiler(s) per the SVF 500/600 boiler manual and
all applicable codes, including vent/air piping and water
piping.
• See suggested piping in this manual and boiler manual.
• As shown in the suggested piping examples, DHW tanks
can be either piped directly o󰀨 of individual boilers or as
a separate zone in the heating system.
• See page 25 for additional information on multiple
boiler installation options.

Electrical
• For details, see the Field Wiring section.
BOILER POWER SUPPLY
• Connect 120 VAC power to boiler as directed on the boiler
wiring diagram (on boiler and on page 54).
INPUTS & OUTPUTS
• Each boiler provides four input/output pairs. Input circuits
are 24 VAC. DO NOT apply voltage. Use dry contacts only.
Outputs are 120 VAC, 2.2-amps max (use relays if loads
exceed 2.2 amps or if outputs must be 24 VAC or must be
isolated contacts).
• The input/outputs can be used with zone thermostats and
zone circulators or zone valves (requires isolation relays
unless valves are 120 VAC), providing up to four zones per
boiler on a multiple system.
• If required, the AUX PUMP/OUTPUT feature can turn any
of the input/outputs into a customized output with many
operation types. This should be used for system pumps
which operate independently from a heat demand or when
multiple inputs should activate a common output. Setup
can be done through the WIZARD or manually in System
Settings, Input menu.
SENSORS
• Connect an outdoor sensor, system supply sensor and
system return sensor to at least one of the boilers in a
multiple boiler system.
• Preferably, connect outdoor, system supply and system
return sensors to more than one boiler to provide
redundancy. If one of the sensors fails, the master boiler
control automatically looks for an available sensor.
MULTIPLE BOILER COMM CABLES
• For multiple boilers, connect boiler-to-boiler
communication cables as directed in Section N,
page 65.
ADDITIONAL INFORMATION
• For ow switch or CAD interlock wiring, see Section J,
page 62.
• For external limit connections, see Section F, page 60.
• For low water cut-o󰀨 connections, see Section G,
page 61.
• For 0–10 VDC inputs, see Section K, page 62 and
Section L, page 63.
• For 0–10 VDC outputs, see Section M, page 64.
ZONING METHODS
• See wiring and control setup information for typical
zoning applications beginning on page 66.
• See example systems beginning on page 19.

POWER ON
IMPORTANT
Follow all instructions in the boiler manual, including all
start-up inspections and nal checks.
• Turn OFF the manual gas cock at the boiler to prevent gas
ow during setup.
• Turn the boiler ON.
• Follow the prompts on the screen to reach the BOILER
SETTINGS initial start-up screen.
• See Figure 23, page 71 for navigation information.
Note that the screen sequence changes after initial
setup, as shown.

Wizard
• Select the START WIZARD option when prompted. See
page 14.
• Use on-screen help as needed. For additional information,
see details in this manual.
DO NOT select SKIP WIZARD unless the control is to be
congured manually.

Finish setup
• Some additional control settings may need to be changed,
depending on the application.
• See explanation of control operation and settings,
beginning on page 69.

Start-up
• Apply the boiler manual instructions to verify the
installation and to start up the boiler, using combustion test
instruments as directed.
!
WARNING
The Wizard must be used when using the EXPRESS Setup procedure to ensure that all required
settings are made. All instructions in the SVF 500/600 boiler manual must be followed completely.
Failure to comply can result in severe personal injury, death, or substantial property damage.

14 550-100-207/1023
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
The Wizard is available on the initial setup of the
boiler. It can however be accessed later.
If the Wizard is accidentally by-passed, follow
navigation sequences shown on page 77. Select
<RESET FACTORY DEFAULTS> on the Boiler
Settings menu. Select <RESTART Wizard> and
follow screen directions. Boiler setup must then be
started over from the beginning.
The Wizard leads through a step-by-step setup
procedure designed for the application chosen.
Context-sensitive help is available to explain the
purpose of key setup items.
MENU
Item
PURPOSE
BOILER
SETTINGS
WIZARD
SCREEN
• This screen appears on initial start-up.
• Perform the WIZARD steps for every boiler.
•ALTITUDE and FUEL TYPE are critical parameters. They must
be entered correctly for each boiler before proceeding.
• Enter the WWSD temperature – This sets the outside
temperature below which Space heating systems will be
disabled. WWSD must also be selected during system setup to
enable it.
• Manual Reset High Temperature Limit acts as a temperature
safety. Exceeding this temperature control will enter lockout and
require a manual reset to continue.
PUMP
SETTINGS
• 0-10V PUMP OUTPUT enables and disables using the
0-10 VDC output for use with variable speed pump control. All
options can be set later by using the Manual Test Mode Force
Rate to adjust and save the desired voltage output for each
setting. See Manual Test Mode section on page 79 for further
details.
• VARIABLE SPEED MAX RATE VOLTS sets the output
voltage of the 0-10 VDC output when the boiler is operating at
maximum rate.
• VARIABLE SPEED MIN RATE VOLTS sets the output
voltage of the 0-10 VDC output when the boiler is operating at
minimum rate.
• VOLTS WHEN BURNER OFF sets the output voltage of
the 0-10 VDC output when the boiler has a call for heat, but
does not need to re its burner. The pump also runs at this
voltage when the boiler is in Standby, Pre-pump, Pre-purge and
Post-purge/Post-pump states. It will transition to mirroring rate
based on Variable Speed Max/Min Rate Volts constraints and
the actual blower speed when in Ignition Speed state and all
burner-active states.
USE/SKIP
WIZARD
SCREEN
• SELECT USE WIZARD.
•DO NOT select SKIP WIZARD. Selecting SKIP WIZARD will
take the screen to the USER MENU. All setup would then have
to be done manually.
(continued on the next page)
BOILER SETTINGS
EDIT
FUEL TYPE: NATURAL GAS
ALTITUDE:0-2000 FEET
TEMPERATURE UNITS: °F
WWSD TEMP: OFF
MANUAL RESET HIGH TEMP LIMIT: 70°F
DATE/TIME
HELP
FOR DETAILS ON ANY SELECTED LINE,
PRESS THE HELP BUTTON.
PUMP SETTINGS
0-10V PUMP OUTPUT: ENABLED
VARIABLE SPEED MAX RATE VOLTS: 10.0
VARIABLE SPEED MIN RATE VOLTS: 1.0
VOLTS WHEN BURNER OFF: 10.0
EDIT
USE/SKIP WIZARD
THE WIZARD IS A SERIES OF SCREENS THAT WILL
LEAD YOU THROUGH SETTING UP THE BOILER STEP
BY STEP. USING THE WIZARD WILL HELP KEEP YOU
FROM SKIPPING STEPS DURING INSTALLATION.
USE WIZARD
SKIP WIZARD
(RECOMMENDED)
Screens shown on this page are typical only.
Actual screens depend on control settings chosen.

15550-100-207/1023
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MENU
Item
PURPOSE
INPUT/
OUTPUT
WIZARD
SCREEN
• Each boiler provides four input/output pairs. Each pair can be
setup to function as a call for heat with output or to perform as an
auxiliary function, such as operating a system pump.
• After the WIZARD screens are completed for INPUT 1, the
WIZARD starts over with INPUT/OUTPUT 2, then to INPUT/
OUTPUT 3 after 2 is completed, followed by INPUT/OUTPUT 4.
• Select HEAT/DHW DEMAND if the input/output is connected to
a heating or DHW zone or system. The input could be a zone
thermostat or end switch. The output could be 120 VAC to a
circulator (2.2 amps or less) or isolation relay.
• Select AUX PUMP/OUTPUT, use this screen to set when a
AUX PUMP/OUTPUT is activated. For detailed explanation,
see page 88 if the input is to be used for a system pump,
combustion air damper interlock, etc.
• To operate a system pump, setup the input as AUX PUMP/
OUTPUT. Connect the corresponding output to the system
pump or pump relay (if pump load exceeds 2.2 amps). When
the ACTIVATE OUTPUT # screen appears, select the setting
applicable to your application.
• Select PRIMARY VALVE CONTROL if the system uses bypass
or isolation valves. For detailed explanation, see Figure 38,
page 89, or on-screen in the WIZARD HELP menu for each
option. This option is only available for Master/Shadow boilers.
• Select NOT USED if the input/output is not needed.
HELP
BYPASS VALVE (NO)
BYPASS VALVE (NC)
ISOLATION VALVE (NO)
ISOLATION VALVE (NC)
ACTIVATE OUTPUT– 2:
WIZARD
WIZARD
ALWAYS ON
EXTERNAL SWITCH
OUTDOOR BELOW WWSD
ANY INPUT
INPUTS PRIORITY SETTING
SYSTEM DAMPER
LOCAL DAMPER
ACTIVATE OUTPUT – 2:
HELP
WIZARD
WHERE
HELP
HEAT DEMAND
AUX/PUMP OUTPUT
PRIMARY VALVE CONTROL
NOT USED
NOTE: ATTACH A THERMOSTAT OR DEMAND
REQUESTING DEVICE TO THIS INPUT AND/OR
A CIRCULATOR PUMP TO THE OUTPUT
WHAT IS THE USE OF INPUT/OUTPUT – 2?

16 550-100-207/1023
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
Screens shown on these pages are typical only.
Actual screens depend on control settings chosen.
MENU
Item
PURPOSE
PRIORITY
SELECTION
WIZARD
SCREEN
• For multiple boiler applications, the control provides up to four
priorities, as listed on this screen. Preference is given to these
priorities in the order shown (Priority 1 through 4).
• Select which priority will be operated by this input/output.
• All boilers can operate on demand from Network priorities.
NETWORK PRIORITIES:
• Any input on any boiler can be assigned to a network priority
(NETWORK PRIORITY 1 or NETWORK PRIORITY 2).
• The WIZARD will only allow settings to a Network Priority on
the Master Boiler. It will skip setting up a Network Priority on all
shadow boilers.
• All boilers on the network will re to meet network demands.
• The Network Priority Not Assigned screen only appears when a
Network Priority is not setup on the Master.
LOCAL PRIORITIES:
• Any boiler can use its input/outputs to operate up to two local
priorities (LOCAL PRIORITY 1 and LOCAL PRIORITY 2). This
applies only for heating loops directly piped to the boiler.
• Local demands are only satised by the boiler to which the
input is wired. Local heating loops must be directly piped to the
boiler. Single boilers use Local 1, Local 2 and Local 3 in place
of network calls
SYSTEM
TYPE
WIZARD
SCREEN
• Use this screen to select the System type for this priority.
• The control will automatically set operating parameters to suit
the system type chosen.
• For factory default settings, see Table 10, Table 11, and
Table 12 on pages 73 and 74.
• Operating parameters can be customized in the next screen.
• Select CUSTOM to manually congure the operating settings
for the system and bypass WWSD setting for this priority.
•NETWORK PRIORITY 1 or 2– This screen will not show on
a shadow boiler if the input/output is assigned to a network
priority. The screen will only appear on the Master boiler, where
the priority must be congured.
(continued on the next page)
WIZARD
PRIORITY 1 – LOCAL 1
PRIORITY 2 – NETWORK 1
PRIORITY 3 – NETWORK 2
PRIORITY 4 – LOCAL 2
WHAT PRIORITY IS INPUT/OUTPUT-2?
HELP
WIZARD
YES
NO
HELP
NETWORK PRIORITY 1
HAS NOT BEEN ASSIGNED TO AN INPUT YET.
WILL NETWORK PRIORITY 1 BE USED?
NOTE: NETWORK PRIORITIES CAN USE ALL BOILERS IN THE
NETWORK TO SATISFY HEAT DEMAND CALLS.
WIZARD
FAN COIL
FINNED TUBE BASEBOARD
CAST IRON BASEBOARD
CAST IRON RADIATOR
RADIANT – SLAB ON GRADE
RADIANT – THIN SLAB
WHAT SYSTEM TYPE IS PIPED TO OUTPUT 2?
–
HELP

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MENU
Item
PURPOSE
PRIORITY
SETTINGS
WIZARD
SCREEN
•SYSTEM TYPE – Read only (assigned in previous step).
•TARGET MOD SENSOR – Read only for network boilers,
adjustable for single boilers – Shows which sensor reading is
used for modulation. Boiler sensor is default for local priorities.
System sensor is default for network priorities.
•TARGET ADJUST – Select how target temperature is calculated:
NONE (No reset, xed target temp = MAX TARGET TEMP)
ODT (Outdoor reset operation; default setting). Target temperature
is calculated from the outdoor reset curve. MAX TARGET TEMP
is target temperature when outside temperature equals Outdoor
temp for MAX target. MIN TARGET TEMP is target temperature
when outside temperature equals Outdoor temp for MIN target.
At outdoor temperatures in between, target temperature is scaled
proportionally.
0–10V (Target temperature based on input from remote source).
MAX TARGET TEMP is target temperature at VOLTAGE
FOR MAX TARGET value. MIN TARGET TEMP is target
temperature at VOLTAGE FOR MIN TARGET value. For voltage
values between max and min, target temperature is scaled
proportionally.
•MAX TARGET TEMP – Set MAX TARGET TEMP to the required
supply water temperature for the system at design maximum heat
loss (typically 180°F for nned tube baseboard on new installations).
•MIN TARGET TEMP – MIN TARGET TEMP should equal the
desired minimum supply water temperature for the system. This
line will not show if TARGET ADJUST is selected as NONE.
•OD RESET MAX – means the outdoor temperature at which the
target temperature reaches its minimum (MIN TARGET TEMP).
(Does not appear if 0–10V is selected for TARGET ADJUST).
•OD RESET MIN – means the outdoor temperature at which the
target temperature reaches its maximum value (MAX TARGET
TEMP). (Does not appear if 0–10V is selected for Target Adjust).
•VOLTAGE FOR MAX TARGET – Appears if 0–10V is selected for
Target Adjust. Set the voltage at which Supply Max temp is required.
•VOLTAGE FOR MIN TARGET– Appears if 0–10V is selected
for Target Adjust. Set the voltage at which MIN TARGET TEMP
temperature is required. For voltages between Min and Max, the
target temperature will be adjusted on a linear curve.
•BOOST TIME – Every time the call for heat surpasses this
duration of time the target temp will boost up 10°F. It will cap o󰀨 at
Supply Max. Only active if a reset curve via Target Adjust setting
is being used.
•RUN BOILER PUMP – Selects whether the Boiler Pump is turned
on while running on this call for heat. This setting is YES for
network priorities and is not adjustable.
•RUN AUX PUMP/ OUT – Selects whether Inputs/Outputs in the
system congured as AUX PUMP/OUTPUT are turned on while
running on this call for heat.
•MAX ON TIME / MIN ON TIME – Maximum or minimum time
the network will run on this priority if it is being asked to run on
another network priority. MAX shows for Network Priority 1, MIN
shows for Network Priority 2. This line ONLY shows on the Master
boiler Wizard. It does not appear on Shadow boilers.
WIZARD
EDIT
MODULATION SENSOR: SYSTEM SUPPLY
TARGET ADJUST: OUTDOOR TEMP
MAX TARGET TEMP: 180°F
MIN TARGET TEMP: 140°F
OUTDOOR TEMP FOR MAX TARGET: 0°F
OUTDOOR TEMP FOR MIN TARGET: 70°F
HELP
SYSTEM TYPE: FAN COIL

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
Screens shown on these pages are typical only.
Actual screens depend on control settings chosen.
MENU
Item
PURPOSE
PRIORITY
TIMERS
WIZARD
SCREEN
• The timings set on this screen prevent the boiler from
operating too long on one demand if another demand is
present. They also prevent short cycling on a demand.
• L1 and L2 are times for local priorities.
•NET MIN ON TIME and NET MAX ON TIME are the
maximum and minimum times this boiler will dedicate to a
call from a network demand.
• Net Min and Max are replaced by L2, and L2 Min is
replaced by L3 Min for a Single boiler.
SEQUENCE
TYPE
WIZARD
SCREEN
• Use this screen to set how boilers are sequenced and how
usage is rotated between boilers on the network.
• For a complete explanation of Sequencing and Rotation,
see pages 81-82.
• Sequencing means the way in which boiler ring rate is
controlled as boilers are turned on and o󰀨 by the Master
boiler.
• With the default settings, SMART SEQUENCING®
maximizes e󰀩ciency when adding boilers to the network.
It runs more boilers to satisfy the demand. Boilers added
start at the user-set Base Rate Low.
• With the default settings, PARALLEL SEQUENCING
balances e󰀩ciency and number of boilers running. Each
boiler modulates up to the user-set Base Rate High before
adding another boiler.
• With the default settings, SERIES SEQUENCING
minimizes the number of boilers running. Each boiler
modulates to its Max Rate before adding another boiler.
• Rotation means how and how often the boiler ring order is
changed.
•LEAD BOILER ROTATE options are based on how long
a boiler has operated. Select either OFF, BY BOILER
ID, TOTAL HOURS or INCREMENTAL HOURS. See
detailed explanation of options on page 81.
• Use the ROTATE FREQUENCY setting to control how
often the rotation sequence is changed.
•FORCE LEAD ROTATE – If set to YES, then when the
frequency timer expires and the new order is calculated,
this forces the new boiler order to take e󰀨ect while a heat
demand is currently active.
MAINTENANCE
WIZARD
SCREEN
• Use this screen to enter relevant data about the Contractor
(installer) and boiler.
STARTUP
SCREEN
• This screen summarizes what external sensors are on the
boiler, how many boilers are on the network, and the ID of
the boiler.
WIZARD
EDIT
L1 MAX ON TIME: 60 MINUTES
NET MIN ON TIME: 15 MINUTES
MAX ON TIME: 30 MINUTES
L2 MIN ON TIME: 15 MINUTES
HELP
WIZARD
EDIT
SEQUENCE TYPE: SMART
BASE RATE HIGH: AUTO
BASE RATE LOW: 20%
LEAD BOILER ROTATE: TOTAL HOURS
ROTATE FREQUENCY: 7 DAYS
FORCE LEAD ROTATE: YES
HELP
BOILER SEQUENCING
WIZARD
EDIT
INSTALLER NAME:
PHONE: ###-###-####
MODEL: SVF 500
LEAD BOILER ROTATE: TOTAL HOURS
ROTATE FREQUENCY: 7 DAYS
LAST MAINTENANCE PERFORMED: 4/21/23
INTERVAL SET: 12 MONTHS
LAST CALIBRATION: 4/21/23 1:18PM
HELP
STARTUP SCREEN
BOILER MODEL
SVF 500
BOILER ID:
BOILERS ON NETWORK:
SYSTEM SENSORS:
OUTDOOR:
MASTER-1
4
ATTACHED
ATTACHED

Figure 11 Piping schematic - typical piping for single SVF boilers. Adjust boiler connections as required for other boiler
models.
Legend – Figure 5
1. Flow/check or spring check valve.
2. Isolation valves.
3. Strainer (recommended on each boiler on return line)
(Not shown)
4. Unions as needed for service.
5. Indirect tank circulator.
6. Zone circulator.
7. Expansion tank (diaphragm type).
8. System air eliminator.
9. System automatic air vent.
12. Cold water supply.
13. Supply water temperature control (when used).
14. Water ow switch (when used) — locate a ow switch
in each boiler loop if individual protection is required.
15. Boiler circulator.
18. Boiler P/T gauge, installed per the SVF 500/600
boiler manual.
19. Install system supply and return sensors to lines as
shown, at least 6 pipe diameters (but no more than
3 feet) from boiler connection tees.
20. Drain valves.
21. Relief valve and discharge piping, installed per the
SVF 500/600 boiler manual.
22. Indirect Tank.
23. Indirect tank relieve valve.
SPACE HEATING Zones
20
20
Additional zonesAdditional
zones
2
2
2
2
1
1
2
2
2
2
1
1
2
2
2
2
1
1
8
8
9
9
7
7
12
12
2
2
2
2
6
6
6
6
6
6
SUPPLY
RETURN
BASEBOARD
BOILER
DHW
LEGEND
Do not exceed
8 pipe diameters apart
19
19
19
19
20
20
1
1
2
2
2
2
2
2
20
20
2
2
5
5
20
20
1
1
4
4
4
4
14
14
2
2
2
2
20
20
23
23
PIPING
230171
FS
21
21
Boiler
In
Boiler
Out
4
4
18
18
15
15
4
4
22
22
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2
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8
Purpose
• Space heating with multiple zones.
• Zoning with circulators using control outputs to
operate zone circulators (4 zones if space heating
only; or 3 space heating zones plus DHW).
• DHW piped directly to the boiler.
• DHW priority — space heating is disabled during
call for heat from water heater.

Multi-zone  (Circulators with & without circulator relays) |  (Direct-piped)

CONTROL SETTINGS
(in order of WIZARD sequences)
BOLD ITALIC - value must be set or veried
D — default acceptable; change if desired
BOILER SETTINGS
BOILER MODEL Verify model number is correct
WWSD TEMP Default (70°F) or as required
HIGH ALTITUDE Set to closest altitude if over 2,000 feet
INPUT/OUTPUT 1 (Assign to PRIORITY 1) *
WHAT IS THE USE OF INPUT/
OUTPUT 1? HEAT/DHW DEMAND
WHAT PRIORITY IS INPUT #1? Select PRIORITY 1
WHAT SYSTEM TYPE IS INPUT/
OUTPUT 1? DHW (D)
TARGET MODULATION SENSOR BOILER OUT (D)
TARGET ADJUST NONE (D)
MAX TARGET TEMP D
RUN 120V BOILER PUMP? Yes (D)
RUN AUX PUMP/OUTPUT? D (not applicable)
INPUT/OUTPUT 2 (Assign to PRIORITY 2)
WHAT IS THE USE OF INPUT/
OUTPUT 2? HEAT/DHW DEMAND
WHAT PRIORITY IS INPUT #2? PRIORITY 2
WHAT SYSTEM TYPE IS INPUT/
OUTPUT 2? Select correct system type
TARGET MODULATION SENSOR System Supply
TARGET ADJUST ODT (D)
MAX TARGET TEMP D
MIN TARGET TEMP D
OUTDOOR TEMP FOR MIN
TARGET D
OUTDOOR TEMP FOR MAX
TARGET D
TARGET BOOST TIME D
RUN 120V BOILER PUMP? YES (D)
RUN AUX PUMP/OUTPUT? D (not applicable)
INPUT/OUTPUT 3 (Assign to PRIORITY 2)
If PRIORITY 2 is assigned, no further steps are required. If PRIORITY 3 is
assigned, repeat the steps from INPUT/OUTPUT 2, above.
INPUT/OUTPUT 4 (Assign to PRIORITY 2)
If PRIORITY 2 is assigned, no further steps are required. If PRIORITY 3 is
assigned, repeat the steps from INPUT/OUTPUT 2, above.
PRIORITY SWITCH TIMES:
P1 MAX ON TIME D
P2 MAX ON TIME D
P2 MIN ON TIME D
P3 MIN ON TIME D (not applicable)
Finish the WIZARD
ENTER TIME, DATE, AND MAINTENANCE INFORMATION AS PROMPTED.
* If DHW is not used, provide a fourth space heating zone by setting up INPUT/
OUTPUT 1 exactly the same as INPUT/OUTPUT 2. Assign INPUT/OUTPUT 1 to
PRIORITY 2. Wire the fourth zone thermostat to J17 – 1&2 and its circulator to
T2 – 4, 5, 6.
Table 2 Control settings, Example A single boilers
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8
Control Setting Notes
NOTICE
Verify that the correct system type is selected on
the control and that operating temperature settings
are suitable for the system. System and structural
damage can occur if temperatures are too high.
• See the table at right for settings.
• The sequence in the table follows the WIZARD.
• If not using the WIZARD, follow instructions
elsewhere in this manual to enter the settings
manually.
Circulators and Piping
!
WARNING
Provide an external relay and external power to
any circulator if its load rating exceeds 2.2 amps
FLA, 3.6 amps locked rotor, or 16.4 amps in rush.
Failure to comply can result in severe personal
injury, death, or substantial property damage.
!
WARNING
Use primary/secondary piping. Incorrect setup or
piping can result in severe personal injury, death,
or substantial property damage.
• Piping must be primary/secondary as shown.
• DHW circulator must be selected to handle the
pressure drop through the water heater and piping.
DHW circulator supplied by installer.
• For some large indirect water heaters, the
required ow rate may require piping the water
heater di󰀨erently.
• The control settings in table at right provide DHW
priority — space heating will be discontinued during
a call for DHW.
• Zone circulators supplied by installer. For alternate
zone wiring using a zone controller, see page 66.
• Boiler circulator must be supplied by installer.
• Follow all instructions in this manual for piping
boiler and system.
