© 2017 PoolPak LLC. All rights reserved. MPK Series - Installation, Operation and Maintenance | 15
PoolPak
®
MPK Series IOM
CPCS Control Functions
Overview
The PoolPak is controlled by the CommandPak Control System (CPCS), a microprocessor-based system that
incorporates all of the functions necessary to maintain correct natatorium temperature and humidity and control
pool water temperature. The CPCS is designed to work with the PoolPak dehumidification system to provide an
environment that is both comfortable and cost effective. It controls unwanted humidity in the pool enclosure and
helps to prevent unsightly condensation from forming on surfaces.
The PoolPak controls automatically operate the heating, dehumidification, and heat recovery systems in response
to the greatest requirements while adjusting unit outputs to maintain building conditions. The PoolPak® controls are
capable of providing full heating capacity to either air or water and of providing proportional control of heating
and dehumidification by loading stages of compressor capacity as necessary. As building requirements are
satisfied, the compressor unloads.
All PoolPak operating and logic controls are factory mounted and wired. The control sequences are designed
specifically to control swimming pool environmental conditions. The following is a brief description of the control
functions available with the CPCS System. For more detail or for finding this information in the controller, see the
MPK Installation and Operation Manual (IOM).
Air Flow Monitoring and Control
The best way to control building pressure is by measuring and controlling airflow rates. The PoolPak system employs
factory mounted VFD or EC motors on the supply fan array, exhaust fan, and purge fans to modulate airflow. The
controller receives feedback from fan inlet measuring stations and the outdoor air measuring station to continuously
monitor the outside air, exhaust air, purge air, and supply air flows. These components and CPCS controller logic
provide active airflow monitoring and control.
By tracking the airflow rate of the exhaust fan and outdoor air intake, a consistent building pressure can be
maintained. See Figure 2-3 for reference. The CPCS controller takes the outside air flow measurement and controls
the speed of the exhaust fan. This control maintains a constant return air flow/supply air flow differential whether the
system is operating at the minimum outdoor airflow rate or maximum outdoor airflow rate (ie. economizer mode).
To determine the desired air flow rates, the controller must be programmed with setpoints for the desired supply air
flow, the desired return air flow, the minimum outdoor air flow, and minimum mixed air temperature allowed. During
minimum outdoor air ventilation, the controller controls the outside air and recirculation air dampers to maintain the
minimum ventilation air requirement. During economizer mode, the controller modulates the outside air flow and
exhaust air flow to maintain space conditions.
To Next Page
Loading...