McQuay RCS User Manual

IM-738 Page 19
Table 4: Controls, settings and functions (continued)
SYMBOL DESCRIPTION FUNCTION RESET LOCATION SETTING RANGE DIFFERENTIAL PART NO.
RAE Return air enthalpy
sensor
Used to compare return air
enthalpy to outside air enthalpy
(used with OAE).
N/A Economizer
section
N/A N/A N/A 049262202
RAT Return air
temperature sensor
Senses return air temperature. N/A Return air
section
N/A 3K ohms at
77°F (25°C)
N/A 060004705
SD1 Smoke detector,
supply air
Initiates unit shutdown if smoke
is detected.
Manual Discharge air
section
N/A N/A N/A 04925001
SD2 Smoke detector,
return air
Initiates unit shutdown if smoke
is detected.
Manual Return air
section
N/A N/A N/A 04925001
SPS1 Static Pressure
Sensor Duct # 1
Converts static pressure signals
to voltage signals.
N/A Main control
box
N/A 0—5” w.c.
(0—1245.4 Pa)
1—6 VDC out
N/A 049545005
SPS2 Static Pressure
Sensor Duct # 2
Converts static pressure signals
to voltage signals and sends
them to MicroTech II controller.
N/A Main control
box
N/A 0—5” w.c.
(0—1245.4 Pa)
1—6 VDC out
N/A 049545005
Static Pressure
Sensor: Building
(Space) Pressure
Converts static pressure signals
to voltage signals.
N/A Main control
box
N/A -025—0.25” w.c.
(-62.3—62.3 Pa)
1—5 VDC out
N/A 049545006
SV1, 2 Solenoid valve
(liquid line)
Closes liquid line for pumpdown. N/A Condenser
section
N/A N/A N/A See parts
catalog
SV5, 6 Solenoid valve
(hot gas bypass)
Closes hot gas bypass line for
pumpdown.
N/A Condenser
section
N/A N/A N/A 047931304
S1 System Switch Shuts off entire control circuit
(except crankcase heaters)
N/A Main control
box
N/A N/A N/A 001355000
S7 ON-OFF-AUTO
switch
Used to manually switch unit. N/A Main control
box
N/A N/A N/A

McQuay RCS Specifications

General

Brand	McQuay
Model	RCS
Category	Air Handlers
Language	English