General Information
12 RT-SVX36K-EN
Compressor Modules
(SCM & MCM - 1U49 standard on all units)
The compressor modules, (Single Circuit & Multiple
Circuit), upon receiving a request for mechanical cooling,
energizes the appropriate compressors and condenser
fans. It monitors the compressor operation through
feedback information it receives from various protection
devices.
Human Interface Module
(HI - 1U65 standard on all units)
The Human Interface module enables the operator to
adjust the operating parameters for the unit using it's 16
key keypad.The 2 line, 40 character LCD screen provides
status information for the various unit functions as well as
menus for the operator to set or modify the operating
parameters.
Heat Module
(1U50 used on heating units)
The Heat module, upon receiving a request for Heating,
energizes the appropriate heating stages or strokes the
Modulating Heating valve as required.
Modulating Dehumidification Module
MDM
(Optional 1U107 - used with Dehumidification
Control)
The MDM supports specific control inputs and outputs for
Modulating Dehumidification control including
Modulating Reheat and Cooling valve control as well as
the Reheat Pumpout Relay output.The Modulating
Dehumidification control Algorithm provides control
requests to the MDM to accomplish proper
Dehumidification control.
Table 1. RTM Resistance Input vs. Setpoint Temperatures
RTM cooling or heating
setpoint input used
as the source for
a ZONE temp setpoint (°F)
RTM cooling setpoint input
used as the source
for SUPPLY AIR temp
setpoint cooling (°F)
Resistance (Ohms) Max.
Tolerance 5%
40 40 1084
45 45 992
50 50 899
55 55 796
60 60 695
65 65 597
70 70 500
75 75 403
80 80 305
n/a 85 208
n/a 90 111
Table 2. RTM Resistance Value vs. System Operating Mode
Resistance applied to RTM MODE
input Terminals (Ohms)
Max. Tolerance 5%
Constant Volume/SZVAV Units
Fan Mode System Mode
2320 Auto Off
4870 Auto Cool
7680 Auto Auto
10770 On Off
13320 On Cool
16130 On Auto
19480 Auto Heat
27930 On Heat
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