Scg1200, Space Heating And Domestic Hot Water - Slant/Fin Caravan LDWO-1100-3-6 Application Manual

SCG-1200-D-06-04 CARAVAN CONTROL SYSTEM WIRING DIAGRAM
• Domestic hot water and space heating
• Up to 6 space heating modules
1 REFER TO FIG. C1 ON PG. 29 FOR WIRING AT
MODULES.
2
CONTACTS REFLECT CLOSED VALVE.
3
R AND W MAKE ON TEMP. RISE ABOVE SETPOINT.
4
CONTACT OPENS AT HIGH LIMIT SETTING.
5
RELAYS REFLECT DE-ENERGIZED MODE
6
REMOTE SENSOR (USE SHIELDED CABLE)
SEQUENCE OF OPERATIONS - SCG1200
Space heating and domestic hot water
When outdoor temperature falls below the setting of the system
enable temperature control, the space heating system is enabled.
The microprocessor control will energize the necessary modules to
maintain sufficient supply water temperature based upon outdoor air
temperature. As the outdoor temperature changes, the control
system will increase or decrease the number of operating modules
to meet the supply water temperature required by the outdoor
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ON SYSTEMS WITH MULTIPLE LOW WATER CUTOFFS AND/OR MANUAL RESET HIGH LIMITS,
REFER TO FIG. C2 AND C3 ON PG. 29 FOR PROPER WIRING. ON SYSTEMS WITH ONE
L.W.C.O. INSTALL A JUMPER BETWEEN TERMINALS 1 AND 3 ON THE L.W.C.O.
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ASSEMBLED 6" WIRE AND 1/4" FEMALE QUICK CONNECTORS ARE PROVIDED FOR
CONNECTION TO FIELD WIRING ON SC1200 AND EC1200 PANELS.
(WIRE NUTS BY CONTRACTOR)
temperature. The modules operate with automatic lead/lag, first on -
first off (FOFO), or lead/lag can be disabled to operate first on - last
off. When the outdoor temperature falls below the setting of the
outdoor DHW Changeover Thermostat, and domestic hot water
(DHW) is satisfied, and stage 6 is energized, the DHW valve opens,
allowing the domestic hot water modules to contribute to space
heating.
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