M-Series Technical Manual
89
Cambridge Air Solutions
REMOTE CONTROL STATION
COMPONENTS
Remote Control Station (RCS-S)
The Remote Control Station is a lockable
NEMA 1 enclosure (9" wide x 14" high x
5" deep) equipped with a three position key
lock selector switch (Summer Ventilation –
Off – Heating) and indicating lights for
blower operation (green), burner operation
(red), and reset (amber). An auxiliary
contact wired between terminals Z1 and Z2 is required to
control heater operation in the heating mode. This can be
accomplished by an Exhaust Fan Interlock, a Manual
Make-up Air Switch, an Operating Electronic Thermostat,
etc.
IMPORTANT
A number of the components listed below can be
combined to yield a custom Remote Control Station to
address a wide variety of applications.
Maxitrol Series 14 Remote Heat Adjustment
Dial (RA)
The adjustment dial on the
remote heat adjust (TD114)
is either mounted on the
exterior of the door of the
Remote Control Station or
mounted inside the Remote
Control Station for
tamperproof applications.
The remote heat adjustment control permits manual
adjustment of the discharge temperature from 55˚F to
90˚F. The override temperature selector dial, visible from
the top of the remote heat adjustment control, increases
the discharge temperature above the setting on the dial
face by the increment selected (10˚F to 40°F) when a
jumper or switch contact is provided across terminals 20
and 22.
Maxitrol 14 Space Temperature Override
The Maxitrol Series 14 with Space Thermostat control
system uses the Maxitrol Series 14 controls described
above along with an electronic space thermostat
switch contact to automatically increase the discharge
temperature.
Maxitrol Series 44 / Tamperproof
The Maxitrol Series 44 / Tamperproof controls
function identically to the Maxitrol Series 44
controls (see gas control system) except the space
temperature selector (T244A) is replaced with
two devices. The adjustable portion, the space
temperature selector (TD244A), is mounted inside
the Remote Control Station, and the non-
adjustable
(tamperproof) space sensor (TS244A) is mounted in the
space being heated.
Maxitrol Series 44 / Hazardous Area
The Maxitrol Series 44 / Hazardous Area is the same as the
Maxitrol Series 44 / Tamperproof, except the space sensor
(TS244A) is replaced by a space sensor with epoxy coated
circuitry (ES225A). The standard Remote Control Station
is not suitable for hazardous areas and would need to be
mounted outside of the hazardous area.
Operating Electronic Thermostat (OET)
The operating electronic thermostat is
wired between terminals Z1 and Z2 to
control heater ON/OFF operation in the
heating mode (see page 65).
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 Setback System (TSS)
The temperature setback system is a
combination seven-day programmable
timer with
independent programs for summer
ventilation/heating modes and integral
electronic thermostat with separate
selectable day/night setback temperatures
(see page 67). The thermostat contact is
wired between Z1 and Z2.
Clogged Filter Light (CF)
The clogged filter light is an alarm light mounted
in the Remote Control Station to indicate a clogged
filter condition. Includes an adjustable pressure switch
mounted in the make-up air heater control enclosure to
monitor the pressure drop across the filters.
