71
User Interface Display
Explanation
CH Settings
C H
S E T T I N G S
▲
B o o s t
F u n c t i o n
T e m p
1 0 ° F
T i m e
2 0 m i n
▼
Outdoor reset boost function increases CH set point by
increment (‘Temp’) if CH demand continues beyond pre-set
time limit (‘Time’).
CH set point will continue to increase until set point reaches
195°F / 91°C
Allowable Temperature Increment: 0..36 °F (0..20 °C)
Default Temperature increment: 18 °F (10 °C)
Allowable Time Delay: 1..120 minutes
Default Time Delay: 20 minutes
C H
S E T T I N G S
▲
M a x i m u m P o w e r
C H
M a x
1 0 0 %
▼
Maximum boiler power in CH mode limited by adjusting
‘Maximum Power CH’ setting. Boiler will not exceed this value
while operating in CH Mode.
Allowable Range: 1..100%
Default Setting: 100%
DHW Settings
D H W
S E T T I N G S
D H W m o d e
M O D E : 1
D H W
s t o r e w i t h
s e n s o r
▼
Two DHW modes are available
DHW Mode = 0 ‘No DHW
•
DHW Mode is disabled
•
The DHW thermostat input is ignored and the DHW
•
pump is not used.
• DHW Mode = 2 ‘DHW Store with Thermostat’
Boiler reacts to DHW demand when DHW thermostat
•
input closes.
Boiler modulates to meet DHW demand similar to CH
•
Mode except DHW set point is used. DHW set point set
in Settings’ submenu found in 'User Menu’.
Simultaneous CH & DHW demands handled using DHW
•
Priority Timing. See ‘DHW Maximum Priority Time’
setting below.
Note:
Outdoor reset function disabled while operating in DHW
•
Mode.
Typical when using a DHW indirect storage tank.
•
After DHW demand satisfi ed, boiler enters post purge
•
mode and DHW pump continues to run for 15 seconds.
APPENDIX A - CONTROL MODULE
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