Viessmann Vitocrossal 300 Series Service Instructions Manual page 79

Vitocrossal 300 CU3A 26 to 199 Service
Heating Circuit 1, 2 and 3
Coding in the factory setting
C5:20
C6:74
D3:14
D4:0
D5:0
D6:0
D7:0
D8:0
E1:1
E2:50
(continued)
Electronic minimum supply
temperature limit 68°F
(20°C)
Electronic maximum supply
temperature limit 165°F
(74°C)
Heating curve slope = 1.4
Heating curve shift = 0
The external heating program
changeover changes the
heating program to "Constant
operation with reduced room
temperature" or "Standby
mode"
Heating circuit pump stays in
control mode at signal
"External blocking"
Heating circuit pump stays
in control mode at signal
"External demand"
No heating program changeover
via extension EA1
DO NOT ADJUST
With remote control: No display
correction for the actual room
temperature
Possible change
C5:1 Minimum limit adjustable from 1°F
to to 260°F (-17°C to 127°C) (limited
C5:127 by boiler-specific parameters).
C6:10 Maximum limit adjustable
to from 50°F to 260°F (10°C to
C6:127 127°C) (limited by boiler-specific
parameters).
D3:2 Heating curve slope adjustable
to from 0.2 to 3.5 (see page 50).
D3:35
D4:–13 Heating curve shift adjustable from
to –13 to 40 (see page 50).
D4:40
D5:1 The external heating program
changeover changes to "Constant
operation with standard room
temperature" (subject to coding
address 3A, 3B and 3C).
D6:1 Heating circuit pump stops at signal
"External blocking" (subject to
coding addresses 3A, 3B and 3C).
D6:2 Heating circuit pump starts at signal
"External blocking" (subject to
coding addresses 3A, 3B and 3C).
D7:1 Heating circuit pump stops at signal
"External demand" (subject to
coding addresses 3A, 3B and 3C).
D7:2 Heating circuit pump starts at signal
"External demand" (subject to
coding addresses 3A, 3B and 3C).
D8:1 Heating program changeover
via input DE1 at extension EA1.
D8:2 Heating program changeover
via input DE2 at extension EA1.
D8:3 Heating program changeover
via input DE3 at extension EA1.
--
E2:0 Display correction –5 K
to to
E2:49 Display correction –0.1 K.
E2:51 Display correction +0.1 K
to to
E2:99 Display correction +4.9 K.
Coding 2
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79