HRW 007 to 012 - WESPER - #3

The refrigerant circuit also comprises an HP pressure switch with manual reset (range 28-20 bar) and an LP pressure switch with an automatic reset function (range 1.4-2.4 bar). Two Shrader valves (HP & LP) are available for pressure measurement on the refrigerant circuit or on the front side of models 007 to 012.

The water/refrigerant heat exchanger is of the brazed stainless steel plate type, for increased efficiency. The anti-freeze safety of the heat exchanger is provided by a water pipe sensor located on the water outlet of the unit monitored by the electronic board. Maximum service pressure on the water side (27.5 bar) and on the refrigerant side (28 bar). The heat exchangers are particularly well adapted to the operation of reversible heat exchangers which have high thermal transfer rates for a low water flow-rate.

The air/refrigerant coil is made up of aluminium fins which are mechanically crimped onto copper tubes. The geometry of the coil and of the fin profile have been carefully designed to provide maximum efficiency in the operation of the units.

The cycle reversal valve is designed to be normally energised in heating mode. This logic enables the heat pump to continue to operate in cooling mode if this valve fails.

The liquid receiver enables the charge of HFC 407C refrigerant to be optimised, particularly in cooling mode, in order to maintain a high COP value.

A Bi-Flow expansion valve ensures and enables a wide operating range with water inlet temperatures which can vary between 13 °C and 45 °C at the minimum or maximum flow-rate.

The fan compartment contains the fan-motor assembly, the air/ refrigerant coil and the condensate drain pan. The ventilation section is completely isolated from fan compartment by a thermally and acoustically insulated partition wall.

Wide removable panels provide access to the various internal components. The condensate drain pan has an anti-corrosion treatment and comprises a float-type safety device to prevent accidental overflow of the pan.

All the units up to model 72 are equipped with a 3 speed direct-drive fan motor with ipsothermal protection against overheating during operation. The motor ipsothermal protection fault is displayed in the form of a coded signal on the LED of the RCL remote control.

The 3 fan speeds can be controlled either manually or automatically by the electronic management board of the unit. The fan-motor assembly is mounted on an independent chassis which is isolated from the casing by anti-vibration mounts.

Belt type drive with variable pitch pulley is supplied on models 096 and 120.

In the standard configuration, the fan blows straight in line with the air intake. The perpendicular blowing option is available on all units by switching the side panels and the fan-motor assembly.

In order to facilitate installation on site, a suspension kit consisting of rubber blocks and washers is supplied with the units (except for

models 096 and 120).

- Wired main disconnect switch to be installed on the casing (for

models 019 to 120 only),

- Electric heater at discharge side,

- General alarms fault report,

- Electrical connection kit (for models 007 to 012 only),

- Compressor jacket (for models 007 to 012 only),

- Motorized water valve (for models 019 to 120 only),

- Return plenum (for models 007 to 012 only).

The new generation of HRW model reversible water source heat

pumps is the fruit of our considerable product experience and our awareness of the market, all combined with a technology based on the energy efficiency of machines, in order to provide a market offer for units with the highest performance in terms of COP.

The HRW horizontal units are designed for installation in specifically designed false ceilings or in technical rooms, and are available with a range of nominal cooling capacity ratings of between 1.9 and 30.0 kW, with 13 models based on 5 different case sizes.

To enable a much wider operating range and operation using a water source in an application with a dry cooler, the standard HRW units are designed to operate in a water source temperature range of between 13 and 45 °C.

The casing is made of galvanised sheet steel. To facilitate access to the main components, wide removable panels provide access to the compressor, the fan and the electronic control box.

The condensate drain pan has anti-corrosion treatment consisting of oven-baked epoxy paint.

The inside of the casing, on the fan compartment side, is coated with closed cell polyurethane foam thermal-acoustic insulation; this lagging is 15 mm thick and is classified Ml. On the compressor compartment side, the thermal-acoustic insulation consists of Isofeutre felt, 15 mm thick (except on models 096 and 120).

All units are factory equipped with a G2-M3 disposable air filter, 20 or 25 mm thick, according to the models. Optionally, the units can be fitted with G2-M1, G3-M3 or G3-M1 filter. The filter can be removed/installed from the side of the units without plenum and from the side or from the bottom of the units equipped with plenum, without having to remove the optional return duct.

The water source outlet and return connectors are located on the outside of the unit, on the compressor compartment side. They are female gas type tapped fittings, 01/2", 3/4", or 1"1/4 (male), according to the models. The condensate evacuation connection is of the flexible type with an outside diameter of 16 mm for models 007 to 012, and of the smooth tube type, with an outside diameter of 19 mm for models 019 to 072, 22 mm for models 096 and 120.

The electrical cabinet is located inside the compressor compartment.

A wide access panel is provided to facilitate the maintenance operations. Optionally, the models HRW 07 to 12 can be equipped with an electrical connection kit on front side and with a power on indicating light, avoiding thus acceding to the electrical box for electrical connections and inspection of power on presence.

The electrical power supply required for models HRW 007, 009, 012, 019 & 024 is 230 V / 1 Ph / 50 Hz, whereas models HRW 030 to 120 require 400 V / 3 Ph / 50 Hz + neutral. The compressors are factory equipped with an internal thermal protection with an automatic reset function.

The refrigerant circuit comprises a scroll or rotary type hermetic compressor, a cycle reversal valve, a water/refrigerant heat exchanger, a liquid receiver, a bi-flow thermostatic expansion valve and a finned coil.