AAON RSMV ASM01686 - Overview; RSMV Overview

5
RSMV Technical Guide
OVERVIEW
RSMV Overview
RSMV Features & Application
The ASM01686 Refrigerant System Module for VFD Compressors
(RSMV) monitors and controls one refrigeration circuit of the HVAC
unit. The module is designed for R410-A refrigerant.
The RSMV is connected to the VCCX2 Controller or other AAON
Unit Controller. Up to 4 RSMV’s can be connected, depending on
the size of the system. There are 2 E-BUS Expansion Ports which
allow the use of communicating sensors and E-BUS Modules.
The RSMV provides 4 analog inputs, 3 binary inputs, 3 relays, and
4 analog outputs. See Figures 2 & 3, pages 8 & 9 for wiring.
The RSMV Module provides the following:
• Modulates the Compressors to satisfy the Suction Coil
(Saturated) Temperature. The Suction Coil (Saturated)
Temperature Setpoint is reset by the VCCX2 Controller
to maintain the Supply Air Temperature during Cooling
Mode. During Dehumidication Mode, it controls the
Compressors to the Suction (Saturation) Temperature
Setpoint.
• Modulates the Condenser Fan to maintain the Head
Pressure Setpoint.
• Modulates the Expansion Valves to maintain the
Superheat Setpoint.
• Provides alarms and safeties for the compressor and
condenser operation.
• Provides a 2 x 8 LCD character display and 4 buttons that
allow for status of system operation, system setpoints,
system congurations, sensors, and alarms, and to change
the module’s address, if necessary.