Slant/Fin SC-9 - Manual

INSTALLATION AND OPERATING INSTRUCTIONS
SC-9 Controller
MODULAR BOILER CONTROLLER SERIES
SC-9 Applications
• Space heat systems with outdoor reset
• Constant temperature setpoint control
• Any of these in combination with domestic
hot water heating
If your system is different than the above, call the Slant/Fin
technical services group at 800-873-4346 to
determine if the control can accommodate it.
Controller Packing List
1- SC-9 Modular controller P/N 435081
1- Outdoor sensor with enclosure P/N 339070
2- Universal sensors P/N 339071
1- Used as supply water sensor
1- Used as return water sensor
The SC-9 is a microprocessor control which will sequence up to
nine heating stages based on outdoor air temperature and supply
water temperature. Designed to handle a Caravan gas-fired,
oil-fired or dual fuel-fired hot water heating plant for space heating
or “Setpoint” operation, or either in combination with domestic
water heating. A large easy to read display provides current
system temperatures and operating status. The control has outputs
for a primary pump and either a combustion air damper or alarm.
ADDITIONAL FUNCTIONS INCLUDE:
Primary pump output. Pump exercising. Pump purging. Boiler
demand for space heating loads. Set point demands for set point
loads. Test sequence to ensure proper component operation. CSA
C US certified. Setback input for energy savings.
SPACE HEATING OPERATION: When the outdoor air tempera-
ture drops below a preset value, the heating system is energized.
The SC-9 Controller determines the number of stages required to
meet the space heating needs and fires them. During operation,
the Controller scans system temperatures, adding or deleting
stages as necessary to satisfy heating load.
CONTENTS
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
a) Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
b) Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
c) View of Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
d) System Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Select System Type . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
A. Space heating only with outdoor reset . . . . . . . .13
a) Dip switch settings . . . . . . . . . . . . . . . . . . . . . . .13
b) Functions and defaults . . . . . . . . . . . . . . . . . . . .15
c) Adjusting the settings . . . . . . . . . . . . . . . . . . . . .15
B. Space heating only w/setpoint control . . . . . . . . .18
a) Dip switch settings . . . . . . . . . . . . . . . . . . . . . . . . .18
b) Functions and defaults . . . . . . . . . . . . . . . . . . . . . .18
c) Adjusting the settings . . . . . . . . . . . . . . . . . . . . . . .18
C. Space heating w/DHW w/outdoor reset . . . . . . . .19
a) Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . .19
D. Space heating w/DHW w/setpoint control . . . . . . .20
a) Dip switch settings . . . . . . . . . . . . . . . . . . . . . . . . .20
b) Functions and defaults . . . . . . . . . . . . . . . . . . . . . .21
c) Adjusting the settings . . . . . . . . . . . . . . . . . . . . . . .21
Detailed Information for Adv Mode of
Adv / Installer Dip Switch . . . . . . . . . . . . . . . . . . . . . . . . .22
Viewing the Performance . . . . . . . . . . . . . . . . . . . . . . . . .27
Useful Hints and Reloading Factory Defaults . . . . . . . .28
Testing the control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Factory Default Listings . . . . . . . . . . . . . . . . . . . . . . . . . .32
SETPOINT OPERATION:
The SC-9 adds and deletes stages to minimize the difference
between the desired Setpoint temperature and the actual meas-
ured Supply Water Temperature.
DOMESTIC WATER HEATING:
When configured for “DHW” (Service Water Heating), the control
holds stage #9 out of the Lead/Lag firing sequencing until all other
active stages are energized. Only when the heating load reaches
a maximum will the Stage #9 relay energize. At the same time, a
motorized valve opens allowing the DHW modules to contribute to
space heating. If water temperature in the DHW modules falls
below a pre-set value, the motorized valve will close, retaining
module capacity for domestic water heating.
Printed in U.S.A. 1206 PUBLICATION SC9-40
Part No. 435083000