UTICA BOILERS UBSSC-050 Installation, Operation & Maintanance Manual page 69

User Interface Display
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
T i m e
C H S E T T I N G S
M a x i m u m P o w e r
M a x
D H W S E T T I N G S
D H W m o d e
D H W s t o r e
s e n s o r
APPENDIX A - CONTROL MODULE
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
0
1 0 ° F
2 0 m i n ▼
Allowable Temperature Increment: 0..36 °F (0..20 °C)
Default Temperature increment:
Allowable Time Delay: 1..120 minutes
Default Time Delay:
Maximum boiler power in CH mode limited by adjusting
'Maximum Power CH' setting. Boiler will not exceed this
▲
value while operating in CH Mode.
C H
Allowable Range: 1..100%
▼
1 0 0 %
Default Setting:
Two DHW modes are available
•
• DHW Mode = 2 'DHW Store with Thermostat'
M O D E : 1
w i t h
▼
Note:
•
•
•
69
Explanation
20 minutes
100%
DHW Mode = 0 'No DHW
• DHW Mode is disabled
• The DHW thermostat input is ignored and the DHW
pump is not used.
• 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.
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.
0 °F (10 °C)