Remote Modulation Operation (0-10Vdc Input); Variable Speed Boiler Pumping (0-10Vdc Output) - Weil-McLain SVF 500 Advanced Manual

Commercial condensing gas-fired water boilers
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svf
series
500/600
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 off 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
550-100-207/1023
advanced manual
1
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 fire.
b VARIABLE SPEED MAX RATE VOLTS is
desired voltage delivered to the pump when at
low fire.
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:
MODULATION:
SYS SUPPLY
BOILER OUT:
165-F
BOILER IN:
138-F
SYSTEM SUPPLY:
154-F
SYSTEM RETURN:
112-F
FLUE:
165-F
SAVE AS
MAX VOLTS
setup
OUTDOOR TEMP:
OPEN
1
BLOWER SIGNAL:
43%
BLOWER SPEED:
3976 RPM
FLAME SIGNAL:
FORCE RATE:
HIGH
PUMP VOLTS:
10.0
EDIT
EDIT
1
2
3
4
3.2
5
6
7
8
11

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