© 2017 PoolPak LLC. All rights reserved. MPK Series - Installation, Operation and Maintenance | 37
PoolPak
®
MPK Series IOM
Remote Exhaust Fan Status (9)
The CPCS monitors a contact closure signal from a BAS or remote exhaust fan starter. This allows the control system
to adjust the amount of air exhausted by the unit if a remote exhaust fan is providing supplemental exhaust. This field
wiring should be 2 conductor, 16-20 AWG, shielded, twisted pair.
Contact factory for any remote exhaust fan application.
Summer Ventilation Mode (SE/SEP Only) (10)
The CPCS monitors a contact closure to activate the Summer Vent Mode function. This mode is identical to smoke
purge, but it does not generate and alarm. The purpose of this mode is to accommodate a facility’s desire to draw
lots of air through the open windows and wall louvers in the summer.
Event Mode Interlock (11)
The CPCS monitors a contact closure to activate the Event Mode function. During Event Mode, the minimum damper
position is raised to a value higher than the minimum damper setpoint. This can be used to temporarily allow dilution
of the space air during extremely high pool usage or a large number of spectators. The higher minimum damper
setpoint is configured separately in the setup menu.
Purge Mode Input (SEP ONLY)(12)
The CPCS can receive a contact closure from a remote mounted switch or from a BAS. This input must be connected
to dry (voltage free) contacts only. When activated, the controller will shut down the compressors. During purge
mode operation, the CPCS will attempt to maintain space temperature with the auxiliary heating system. If the
supply air temperature drops to 40°F, purge mode is automatically terminated to provide freeze protection. Purge
mode commands sent to the CPCS through the LonWorks, Modbus, or BACnet interface take precedence over the
purge mode input.
Occupied Mode Input (13)
The CPCS can receive a contact closure from a Building Automation System (BAS) or from a time clock to override
the occupancy schedule stored in the controller’s memory. This input must be connected to dry (voltage free) contacts
only. If the schedule is currently requesting unoccupied operation, activating this input will force the controller into
occupied mode. Although this input overrides the CPCS internal schedule, it will not override commands sent to the
controller via the LonWorks, Modbus, or BACnet interfaces.
Fire Trip Input (14)
The CPCS can receive a contact closure from a building fire and smoke control system. This input must be connected
to dry (voltage free) contacts only. When this input is activated, the CPCS will shut down the compressors and all
unitmounted fans, and will close the outside air and exhaust air dampers. The RIU will display an alarm message
indicating that fire trip mode has been activated. Using the CPCS configuration menu, it is possible to set this input
to be active on open or active on close.
Smoke Purge Input (SE/SEP Only) (15)
The CPCS can receive a contact closure from a building fire and smoke control system. This input must be connected
to dry (voltage free) contacts only. When this input is activated, the CPCS will disable the supply fans and enable
exhaust and purge fans while closing outside air and recirculation dampers to 0%. The compressors will be disabled
during this mode, and the RIU will display an alarm message indicating that smoke purge mode has been activated.
Using the CPCS configuration menu, it is possible to set this input to be active on open or active on close.
Auxiliary Chilled Water Control Valve (16)
The CPCS provides a signal to control a proportional 3-way valve for an auxiliary air cooling system. Terminal block
T12.1-3 provides the analog signal for control of a chilled water valve.
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