HRW 007 to 012 - WESPER - #4

All HRW water source heat pumps are, in their standard version, equipped with a STORM electronic board which manages their operation and their safety devices.

Master/slaves control : the standard version of the STORM electronic board enables operation in master/slaves regulation mode for up to 10 water source heat pumps using a single RCL user remote control.

This configuration enables the installer to save on the purchase and wiring of equipment such as auxiliary relays and multi-wire cables between the various water source heat pumps. Only a bus cable with 2 twisted pairs is necessary between the master and slave units.

When a request for operation in cooling mode is received, the

fan-motor assembly is started up immediately and the compressor does not start until after an effective time delay of 180 seconds. The RCL remote control enables operation in cooling-only mode or in automatic cooling/heating mode with, at a given temperature set-point used as a switch-over point, a neutral switch-over range of +/-3 °C from cooling to heating mode. In cooling mode, the fan runs permanently and the 3 speed ventilation can be implemented in automatic or manual mode: HS, MS, or LS (when applied).

the fan-motor startup is controlled by the electronic board and the temperature of the ICT sensor; the reversal valve is activated before the compressor and the latter does not start until after an effective time delay of 180 seconds. The RCL remote control enables operation in heating-only mode or in automatic heating/cooling mode with, at a given temperature set-point used as a switch-over point, a neutral switch-over range of +/-3 °C from heating to cooling mode. In heating mode, the fan can operate either cyclically (the fan stops when the set temperature is reached) or permanently and the 3 speed ventilation can be implemented in automatic or manual mode: HS, MS, or LS (when applied).

Measurement of the room air temperature : the STORM card electronic regulation enables the selection of a room temperature measurement mode which uses an ambient temperature sensor (RCT) in the RCL remote control, or a return temperature sensor (RAT) located directly on the water source heat pump.

Anti-short cycle : after each compressor shut-down, a time delay of 180 seconds is introduced by the electronic board. This time delay constitutes an anti-short cycle device and therefore helps to protect the compressor.

The configuration of the STORM electronic board enables four different operating modes for water source heat pumps by selecting the following systems :

- Thermodynamic cooling and heating operation (RC);

- Thermodynamic cooling and heating operation or heating operation with an additional electric heater (SH);

- Thermodynamic cooling operation and electrical heating operation

- Thermodynamic cooling operation only (ST).

An RCL user remote control is supplied in the standard version,

in the electrical control box of the units.

It enables individually controlled operation or stand-alone regulation.

The RCL remote control is ergonomically designed and discreet. It comprises a digital display and essential functions such as :

- On/Off,

- Selection of operating mode,

- Room temperature display,

- Fan speed selection,

- Temperature set-point adjustment.

A keypad locking function is also available.

The RCL user remote control comprises a Display LED which shows the operating status of the water source heat pump (Lit : On -Unlit : Off), and it also enables an operational fault to be identified by flashing a specific code.