Carrier BWMAAN000050, Installation, Operation And Maintenance Manual

Page: 65 / 72

65
User Interface Display
Explanation
Boiler Con
fi guration
B O I L E R C O N F I G ▲
P u m p M o d e M O D E : 0
C H o r C H & D H W
▼
Two pump modes are available:
1.
Pump Mode = 0 ‘CH or CH&DHW’
• In this mode either the CH or DHW pump terminal is
energized depending on the type of demand (CH or DHW).
• CH and DHW pumps are never energized at the same time.
• In the case of a simultaneous call for both CH and DHW,
the energized pump depends on whether the boiler is
currently supplying the CH or DHW demand. Refer to DHW
Priority settings below.
• This is typical of a hydronic system design with separate CH
and DHW Pumps.
2.
Pump Mode = 4 ‘System Pump’
• In this mode only one external system pump is installed in
the hydronic system. This pump will energize independent
of the type of demand (CH or DHW).
• Connect this pump to the CH/System Pump electrical
terminal block. See page 56 for diagram.
• The DHW pump terminal does not function.
• This is typical of a hydronic system design which utilizes
zone valves for all CH zones and an DHW indirect tank.
Note:
• Pump Mode selection depends on electrical and
hydronic system design. Please refer to sections 5
and 8 for recommended hydronic piping and electrical
confi gurations.
• Internal heat exchanger pump is energized anytime
demand exists regardless of Pump Mode setting or type
of demand (CH or DHW).
B O I L E R C O N F I G ▲
S E R V I C E R E M I N D E R
S t a t u s O n
R e m i n d e r 3 6 5 d a y s
'Service Reminder’ feature allows the installer to enable or
disable a service reminder notifi cation on the User Interface at a
predefi ned interval .
Service reminder does not affect operation of boiler in any way.
It is only a reminder to End User that routine preventative
maintenance is required by qualifi ed service technician.
Allowed Range: 1 to 999 days
APPENDIX A - CONTROL MODULE