Trane IntelliPak SCRF 25, Инструкция по установке, эксплуатации и обслуживанию

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SCXF-SVX01Q-EN 71
Table 41. RTM resistance value vs. system operating
mode
Resistance applied
to RTM mode input
terminals, ohms
CV Units
VAV
Units
Fan
mode
System
mode
System
mode
2320 auto off off
4870 auto cool
7680 auto auto auto
10,770
on off
13,320
on cool
16,130
on auto
19,480 auto heat
27,930
on heat
Note: Mode boundaries are 1000 to 40,000 ohms. Other
boundaries are equal to the midpoint between the
nominal mode resistance.
Compressor Module
(MCM - Standard on all units)
The Compressor module, 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—Standard on
all Units
The human interface (HI) module enables the operator
to adjust the operating parameters for the unit using its
16-key keypad on the human interface panel. The HI
panel provides a two line, 40 character, clear language
(English, Spanish, or French) LCD screen with unit
status information and menus to set or modify
operating parameters. It is mounted in the unit’s main
control panel and accessible through the unit’s control
panel door.
Remote Human Interface Module Option
The optional remote-mount human interface (RHI)
panel has all the functions of the unit-mounted version
except for service mode. To use a RHI, the unit must be
equipped with an optional interprocessor
communications bridge (IPCB). Model number digit 32
(=2) indicates if the ICPB was ordered with the unit. If
not, contact your local Trane representative to order an
ICPB kit for field installation. The RHI can be located up
to 1,000 feet (304.8 m) from the unit. A single RHI can
monitor and control up to four self-contained units if
each one contains an IPCB. The IPCB switches must be
set as SW1–off, SW2–off, and SW3–on.
Interprocessor Communications Board
(IPCB - Optional used with the Optional Remote Human
Interface)
The Interprocessor Communication Board expands
communications 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”.
Waterside Module—Standard on All
Water-cooled Units
The waterside module (WSM) controls all water valves
based on unit configuration. In addition, the WSM
monitors waterflow proving and the following
temperatures:
• Entering water
• Entering air low
• Mixed air
• Entering condenser water
• Refrigerant circuit 3:
– Saturated condenser
– Evaporator frost
• Refrigerant circuit 4:
– Condenser
– Evaporator
Cooling Tower Interlock
To interlock condenser pump/tower with cooling
operation, wire the cooling tower to an external 115
volt control power source, to ground, and to control
terminal block. Normally open/closed contacts are
provided.
Heat Module
The heat module is standard on all units with factory-
installed heat. It controls the unit heater to stage up
and down to bring the temperature in the controlled
space to within the applicable heating setpoint. Also, it
includes a freezestat, morning warm-up, and heating
outputs.
Ventilation Override Module (VOM)
Option
The ventilation override module can be field-
configured with up to five different override sequences
for ventilation override control purpose. When any one
of the module’s five binary inputs are activated, it will
initiate specified functions such as: space
pressurization, exhaust, purge, purge with duct
pressure control, and unit off.
Once the ventilation sequences are configured, they
can be changed unless they are locked using the HI.
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