Individual Component Descriptions - Cambridge Engineering S Series Technical Manual

INDIVIDUAL COMPONENT DESCRIPTIONS

REMOTE CONTROL STATIONS
REMOTE CONTROL STATION - SECURITY
(RCS-S)
The RCS-S is a lockable NEMA 1 enclo-
sure (9"W x 14"H x 5"D) equipped with a
three position key-lock selector switch
(Summer Ventilation - Off - Heating); an
Operating Electronic Thermostat (OET);
and indicating lights for blower operation
(green), burner operation (red), and reset (amber).
The operator can control the heater from this panel
provided the heater mounted disconnect is in the
"ON" position and the service switches are in the
"REMOTE" position. The OET utilizes an encapsulat-
ed thermistor to sense space temperature. The adjust-
able differential is set by the selection of the ON and
OFF temperatures. See instructions for the OET. (page
33).
TEMPERATURE SETBACK SYSTEM
(TSS)
The TSS is a lockable NEMA 1 enclosure
(9"W x 14"H x 5"D) equipped with a three
position selector switch (Summer
Ventilation - Off - Heating); a combination
seven day programmable timer and ther-
mostat; an override timer; and indicating
lights for blower operation (green), burner operation
(red), and reset (amber).
The operator can control the heater from this panel
provided the heater mounted disconnect is in the
"ON" position and the service switches are in the
"REMOTE" position. The TSS utilizes an encapsulated
thermistor to sense space temperature. The adjustable
differential is set by the selection of the ON and OFF
temperatures. This control can accommodate separate-
ly programmed schedules for both the ventilation and
heating modes. See the operating and programming
instructions for the TSS Controller (page 35).
S-Series Technical Manual
REMOTE CONTROL STATION
COMPONENTS
CLOGGED FILTER LIGHT (CF)
The clogged filter light is an alarm light mounted in
the remote control station to indicate a clogged fil-
ter condition. Includes an adjustable pressure switch
mounted in the electrical control enclosure to monitor
the pressure drop across the filters.
EXHAUST FAN INTERLOCK (EFI)
An exhaust fan interlock is used to interlock the make-
up air heater as a slave to an exhaust fan. Terminals
are provided in the remote control station for wiring of
dry contacts (by others).
MANUAL MAKE-UP AIR SWITCH (MMS)
A manual make-up air toggle switch is used to manu-
ally turn the heater on and off. It is either mounted on
the exterior of the door of the remote control station or
mounted inside for tamperproof applications.
NON-ADJUSTABLE THERMOSTAT (TTP)
The non-adjustable thermostat is a fixed temperature,
solid state, epoxy sealed thermostat with a specified
temperature setpoint, either: 41°F, 50°F, 55°F, 60°F, or
65°F. It is wired between terminals Z1 and Z2.
TEMPERATURE AVERAGING SYSTEM
(TAS-2)
The TAS-2 option is used in conjunc-
tion with the RCS-S or TSS to average
the space temperature between two dis-
tant points within a facility. It consists
of four thermistors which are wired in
a series/parallel combination in order to
simulate a single thermistor response.
67 Cambridge Engineering, Inc.