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Trane INTELLIPAK ™ ™ ™ ™ ™ Commercial Single-Zone Rooftop Air Conditioners with CV or VAV Control User Manual

Page 7

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7

Rooftop Module (RTM - 1U48 Standard on all units)
The Rooftop Module (RTM) responds to cooling, heating,
and ventilation requests by energizing the proper unit com-
ponents based on information received from other unit mod-
ules, sensors, remote panels, and customer supplied bi-
nary inputs. It initiates supply fan, exhaust fan, exhaust
damper, inlet guide vane positioning or variable frequency
drive output, and economizer operation based on that in-
formation.

RTM Resistance Input vs Setpoint Temperatures

RTM cooling or

RTM cooling

heating

setpoint input

setpoint input

used as the

Resistance

used as the

source for

(Ohms) Max.

source for a

SUPPLY AIR

Tolerance 5%

ZONE temp

temp setpoint

setpoint (

o

F)

cooling (

o

F)

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

RTM Resistance Value vs System Operating Mode

Resistance

applied to RTM

MODE input

Constant Volume Units

Terminals (Ohms)

Max. Tolerance

Fan

System

5%

Mode

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

Compressor Module (SCM & MCM - 1U49 standard on
all units)
The Compressor module, (Single Circuit & Multiple Circuit),
upon receiving a request for mechanical cooling, energizes
the appropriate compressors and condenser fans. It moni-
tors 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 key-
pad. 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, en-
ergizes the appropriate heating stages or strokes the Modu-
lating Heating valve as required.

Ventilation Override Module (VOM - Optional 1U51)
The Ventilation Override module initiates specified func-
tions such as; space pressurization, exhaust, purge, purge
with duct pressure control, and unit off when any one of the
five (5) binary inputs to the module are activated. The com-
pressors and condenser fans are disabled during the ven-
tilation operation. If more than one ventilation sequence is
activated, the one with the highest priority is initiated.

Interprocessor Communications Board (IPCB -
Optional 1U55 used with the Optional Remote Human
Interface)
The Interprocessor Communication Board expands commu-
nications from the rooftop unit UCM network to a Remote
Human Interface Panel. DIP switch settings on the IPCB
module for this application should be; Switches 1 and 2
"Off", Switch 3 "On".

Trane Communications Interface Module (TCI - Optional
1U54 used on units with Trane ICS

TM

)

The Trane Communication Interface module expands com-
munications from the unit UCM network to a Trane Tracer
100

TM

or a Tracer Summit

TM

system and allows external

setpoint adjustment and monitoring of status and diagnos-
tics. DIP Switch settings on the TCI
module for these applications should be:
Tracer 100 (Comm3): Switches 1, 2, and 3 are "Off";
Tracer Summit (Comm4): Switch 1 is "On", switches 2, and
3 are "Off"

Lontalk Communication Interface Module (LCI - Optional
1U54 - used on units with Trane ICS

TM

or 3rd party Build-

ing AutomationSystems)
The LonTalk Communication Interface module expands
communications from the unit UCM network to a Trane
Tracer Summit

TM

or a 3rd party building automation system,

utilizing LonTalk, and allows external setpoint and configu-
ration adjustment and monitoring of status and diagnostics.

Exhaust/Comparative Enthalpy Module (ECEM -
Optional 1U52 used on units with Statitrac and/or
comparative enthalpy options)
The Exhaust/Comparative Enthalpy module receives infor-
mation from the return air humidity sensor, the outside air
humidity sensor, and the return air temperature sensor to
utilize the lowest possible humidity level when considering
economizer operation. In addition, it receives space pres-
sure information which is used to maintain the space pres-
sure to within the setpoint controlband. Refer to the table
below for the Humidity vs Voltage input values.

General Information (Continued)