Viessmann GC1 Installation, Start-Up And Service Instructions

24
5712 717 v1.0
Vitotronic 100, KW10B Installation, Start-up and Service
DHW priority
By default, S7.1 is set to the off position. When there is a
DHW call, both the DHW pump and space heating pump
operate at the same time. When S7.1 is turned to the ON
position, the space heating pump will be turned off during a
DHW call to allow boiler output to be dedicated to the DHW
tank.
DHW pump post purge timer
By default, there is no DHW pump post purge. If S7.2
is turned ON, the post purge will be enabled, allowing
the the DHW pump to continue running after the DHW
call has finished. The extra pump operation time helps to
remove excess heat from the boiler to prevent unwanted
tripping of the mechanical limits.
DHW pump post purge timer delay
S7.3 in the OFF position - 120 seconds
S7.3 in the ON position - 60 seconds
DHW priority override timer (Fixed at one hour)
The DHW priority override timer is intended to prevent the
continuous operation of the DHW pump in an effort to satisfy
DHW loads. When S7.4 is turned ON, if there is a DHW call
for more than an hour, the space heating pump will allow
to operate, allowing space heating to function. The override
timer can only be reset by satisfying the DHWW demand at
the current set point or reducing the set point.
DHW boiler temperature function
When there is a DHW call and S7.5 is in the OFF position,
the DHW pump will turn ON immediately. Turning S7.5
to the ON position, will delay the operation of the DHW
pump until the boiler is 18
o
F (10
o
C) hotter than the
current tank temperature.
Minimum boiler water temperature protection
When S7.6 is in the OFF position, a minimum boiler
water temperature will not be maintained. If a minimum
boiler water temperature is required of the boiler, S7.6
must be turned on.
Minimum boiler water temperature selection
S7.7 in the OFF position - 113
o
F (45
o
C)
S7.7 in the ON position - 131
o
F (55
o
C)
DIP switch Position
1
Position
2
Position
3
Position
4
Position
5
Position
6
Position
7
S7
DHW priority
ON - Enabled
OFF - Disabled
DHW pump
post-purge
timer
ON - Enabled
OFF - Disabled
DHW pump
post-purge
timer delay
ON - 60 sec.
OFF - 120 sec.
DHW priority
override
timer (fixed
at 1 hour)
ON - Enabled
OFF - Disabled
DHW boiler
temperature
function
(delay DHW
pump until
warm enough)
ON - DHW
+ 10
o
C
for pump
to turn on
OFF - DHW
pump
turns on
immediately
Electronic
minimum
boiler water
temperature
ON -
131
o
F
(55
o
C)
OFF -
41
o
F
(15
o
C)
Minimum
temperature
selection
ON -
131
o
F
(55
o
C)
OFF -
113
o
F
(45
o
C)
DIP switches
Switches (continued)
Start-up

Viessmann GC1 Specifications

General

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English