Slant/Fin SC-3 - Manual

INSTALLATION AND OPERATING INSTRUCTIONS
SC-3 Controller
MODULAR BOILER CONTROLLER SERIES
FOR GAS-FIRED, OIL FIRED AND DUAL FUEL HOT WATER HEATING PLANTS
SC-3 Applications
• Space Heat Systems With Outdoor Reset
• Constant Temperature Setpoint Control
If your system is different than the above, call the Slant/Fin
technical services group at 800-873-4346 to
determine the proper control.
Controller Packing List
1- SC-3 Modular Controller P/N 435081
1- Outdoor sensor with enclosure P/N 339070
1- Universal sensor P/N 339071
The SC-3 is a microprocessor control which will sequence up to
three 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. A large easy to read display
provides current system temperatures and operating status.
ADDITIONAL FUNCTIONS INCLUDE:
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-3 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
a) Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
b) Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
c) View of Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
d) System Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Select System Type . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
A. Space Heating Only with Outdoor Reset . . . . . . .12
a) Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . .12
b) Functions and Defaults . . . . . . . . . . . . . . . . . . . .13
c) Adjusting the Settings . . . . . . . . . . . . . . . . . . . . .13
B. Space Heating Only w/Setpoint Control . . . . . . . .17
a) Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . .17
b) Functions and Defaults . . . . . . . . . . . . . . . . . . . . . .18
c) Adjusting the Settings . . . . . . . . . . . . . . . . . . . . . . .20
Viewing the Performance . . . . . . . . . . . . . . . . . . . . . . . . .22
Useful Hints and Reloading Factory Defaults . . . . . . . .23
Testing the Contol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Factory Default Listings . . . . . . . . . . . . . . . . . . . . . . . . . .28
SETPOINT OPERATION:
The SC-3 adds and deletes stages to minimize the difference
between the desired Setpoint temperature and the actual
measured Supply Water Temperature.
Dual-Fuel
* Not available in Canada
Printed in U.S.A. 605 PUBLICATION SC-3-40
Part No. 435083000