Features And Specifications; Board Specifications - Modine Manufacturing PTP Manual

FEATURES AND SPECIFICATIONS

MODINE BMS BOARD FOR GAS-FIRED UNIT
HEATERS
The Modine Building Management System (BMS) Board
installed in this unit provides an RS485 interface between the
unit heater and existing building networks that employ a BACnet
or Modbus protocol. The board works in conjunction with the
unit's ignition control module to manage and report the function
of the heater. A BMS network connection is not required
to operate the heater, but allows for expanded control and
monitoring ability.
FEATURES
The BMS Board is capable of the following features:
Energy Saver Function
The BMS Board is wired to a 10K NTC Type III inlet air sensor
that provides feedback of the air temperature at the unit's
installed height. When the unit is operating in this mode, the unit
will turn on the fan only when a call for heat is received, using
the warmer air at the unit to destratisfy the building space before
using the valve to further heat the space.
Input Monitoring
The BMS board receives statuses from the components on the
unit heater to make sure that operation of the unit is normal,
and communicates status over the network. If the board detects
statuses that indicate an issue with normal operation, alarm
codes will be sent over the network. In addition, the board's
"ALM" LED will illuminate on the BMS board.
Temperature Control Flexibility
The BMS board is designed to take room air feedback from a
traditional low voltage mechanical/programmable thermostat or
a 10K NTC Type III sensor (Modine FP48335).
Enhanced BMS Control
By employing BMS control over the provided RS485 connection,
the unit is capable of receiving commands such as Supervisor
On-Off functions, defining summer/winter functionality, and
changing space setpoints. The board will also send statuses for
components such as the fan and gas valve, and communicate
alarms over the network.

BOARD SPECIFICATIONS

Terminals
All terminals shall be slotted screw appropriate for 24-12ga wire.
Power
Class II Transformer secondary voltage supplied to the control
shall be 18.0 to 30.0 VAC, 50/60 Hz. Power requirements of the
control is 12.0 VA max at 24 VAC plus external loads.
ENVIRONMENTAL
Temperature
Operating: -22° to 176°F (-30° to +80°C)
Storage: -40° to 185°F (-40° to +85°C)
Humidity
Operating: 10% to 95%, non-condensing, -22° to 113 °F (-30° to
+45°C )
Storage: 10% to 95%, non-condensing
2
Vibration
No damage or misoperation from 5g sinusoidal acceleration, 10
to 150 Hz.
Mechanical Impact
No damage or misoperation from 3 foot-pound impact to
mounting enclosure when control is properly mounted.
Changing space setpoints. The board will also send statuses for
components such as the fan and gas valve, and communicate
alarms over the network.
BOARD SPECIFICATIONS
Dust/Environment Protection
The BMS Board is conformally coated.
RELIABILITY
Operating Life
12 year minimum design life based on the following duty cycles:
Heating 2500 hours, 15000 cycles per year
Cooling (Fan Only) 2500 hours, 7500 cycles per year
INPUTS/OUTPUTS:
ANALOG INPUTS (2 - 10KOhm NTC Type III Channel)
1. Return Air (This input shall be ignored when the dip switch is
in T-stat position)
2. Intake Air
ANALOG OUTPUTS (0)
None.
DIGITAL INPUTS (6 – 24VAC input)
3. Gin – Fan Call. This input shall be ignored when dip switch
SW4.7 is in on position.
4. W1 – Heating Call (Stage 1) (This input shall be ignored
when dip switch SW4.7 is in on position)
5. W2 – Heating Call (Stage 2) (This input shall be ignored
when dip switch SW4.7 is in on position)
6. Valve Status
7. Pressure Switch Status
8. High Limit / Flame Rollout Status
DIGITAL OUTPUT (3 – Normally Open, 24VAC switch)
1. G, Blower – 24VAC
2. H1 Gas Valve, Single-Stage or Low Stage – 24VAC
3. H2, Gas Valve, High Stage – 24VAC
CONFIGURING BOARD OPERATION
During unit installation, verify the BMS board is set up to operate
correctly with the room air temperature feedback method. Use
SW4.7 dipswitch to select desired operation.
6-520.3