Crest Audio FBN0751, Service Manual

Page: 25 / 56

1
Service
(continued)
25
Service Manual
HWG Pump Anti-Seize Delay
If the boiler pump does not run for 24 hours, it will be turned
on briefly to prevent it from seizing. The length of time it
runs is determined by parameter
K8 .
Δ
T Set Point
The SMART TOUCH control includes a 0 - 10Vdc output for
controlling the speed of a variable speed boiler pump. The
speed is regulated in order to, among other things, maintain
a minimum delta T across the heat exchanger. This helps
reduce the electrical consumption of the boiler pump when
the boiler is firing at less than its maximum rate. This feature
is active only when a system supply sensor is installed. It is to
be used with primary/secondary piping systems only. This set
point can be adjusted by accessing parameter
K9 .
L: Service Notification
Service Notification in Months
When the boiler control determines that a scheduled service
is due based on the months of installation, the boiler display
will turn yellow and a new status screen will appear informing
the installer that maintenance is required. This parameter is
adjustable by the installer by accessing parameter
L1 .
Service Notification Running Hours
When the boiler control determines that a scheduled service is
due based on the hours of actual operation, the boiler display
will turn yellow and a new status screen will appear informing
the installer that maintenance is required. This parameter is
adjustable by the installer by accessing parameter
L2 .
Service Notification Cycles
When the boiler control determines that a scheduled service
is due based on the number of boiler cycles, the boiler display
will turn yellow and a new status screen will appear informing
the installer that maintenance is required. This parameter is
adjustable by the installer by accessing parameter
L3 .
Installer Name and Phone Number
When a Maintenance Reminder timer or counter has expired,
a Maintenance Reminder screen will appear on the display.
By programming the installer’s name and phone number,
this information will appear on the Maintenance Reminder
Screen at that time. This can be programmed by accessing
parameters
L4 and L5 . When selected, another menu will
appear with PHONE and NAME. Note that the phone
number is limited to 10 characters, and the name is limited
to 26 characters. Only 0 - 9, A - Z (CAPS only), &, (,), +,
and - are permitted.
K: Pumps
Boiler Pump Delay
The SH pump delay parameter sets the length of time the boiler
pump will run after a SH demand has been satisfied. This
parameter is adjustable by the installer by accessing parameter
K1 .
Boiler Pump Anti-Seize Time
If the boiler pump does not run for 24 hours, it will be turned
on briefly to prevent it from seizing. The length of time it runs
is determined by parameter
K2 .
Boiler Pump Mode
The SMART TOUCH control is able to control the boiler
pump in 3 different ways. The options are as follows:
1. ON with a call for heat, with a constant speed.
2. ON with a call for heat, with a variable speed
output.
3.
Always OFF (not connected).
The Boiler Pump Mode can be adjusted by accessing parameter
K3 .
System Pump Mode
The SMART TOUCH control is able to control the system
pump in 5 different ways. The options are as follows:
1. ON with a call for heat, with a constant speed.
2. ON with a call for heat, with a variable speed input.
3. Always ON, with a constant speed, except during
outdoor shutdown.
4. Always ON, with a variable speed input, except during
outdoor shutdown.
5. Always OFF (not connected).
For options 2 and 4, the speed of the system pump is controlled
by a separate control system. The pump speed is sent to the
0-10V pump speed input on the boiler. The System Pump
Mode can be adjusted by accessing parameter
K4 .
System Pump Delay
The system pump delay parameter sets the length of time the
system pump (if connected) will run after a SH demand has
been satisfied. This parameter is adjustable by the installer by
accessing parameter
K5 .
System Pump Anti-Seize Delay
If the boiler pump does not run for 24 hours, it will be turned
on briefly to prevent it from seizing. The length of time it runs
is determined by parameter
K6 .
HWG Pump Delay
The HWG pump delay parameter sets the length of time the
HWG pump (if connected) will run after a HWG demand has
been satisfied. This parameter is adjustable by the installer by
accessing parameter
K7 .