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This document is an Installation & Operation Manual for Ducted Indoor Units, specifically models RPIH-(4.0-6.0)FSRE, which use R32/R410A refrigerants. It provides comprehensive information for the proper installation, operation, and maintenance of these air conditioning systems.
The RPIH-(4.0-6.0)FSRE ducted indoor units are designed exclusively to provide air conditioning to people in one or more rooms within the system's installation range. They are not intended for other purposes such as drying clothes, cooling food, or any other process requiring cooling or heating. The system offers three options for installation: high static pressure, standard static pressure (factory setting), and low static pressure, which can be adjusted via the remote control switch.
The manual details the components of the RPIH-(4.0-6.0)FSRE units, including the fan casing, fan, fan motor, heat exchanger, header, expansion valve, air filter, refrigerant gas pipe connection, refrigerant liquid pipe connection, electrical control box, air inlet, air outlet, drain pump, and drain pipe connection.
General dimensions for the unit are provided:
Refrigerant circuit specifications for R32 are outlined, emphasizing the need to consider a minimum floor area for installation if the total refrigerant charge is ≥1.84 kg. For charges below 1.84 kg, no additional minimum area requirements apply. The manual includes a table and graph to determine these minimum area requirements based on the refrigerant amount.
Pipe size selection for RPIH-(4.0-6.0)FSRE models:
Electrical wiring specifications include recommended cable sizes (0.75mm² for power source and transmitting cables, compliant with EN 60335-1), torque values for screws (M3.5: 1.2 N-m, M4: 1.0 to 1.3 N-m), and earth resistance (less than 1 megohm). Shielded twisted pair cables are recommended for control and remote control switch wiring to prevent electromagnetic noise, with total lengths less than 1000m for control cables and 500m for remote control switch cables.
The units are designed for optimal air distribution to achieve uniform room temperature. The static pressure setting, which influences fan performance, can be configured through the remote control switch. The manual provides fan performance curves for RPIH-4.0FSRE, RPIH-5.0FSRE, and RPIH-6.0FSRE models, illustrating external static pressure (Pa) versus air flow (m³/min) for high, standard, and low static pressure conditions. The "High H" speed is only available with the PC-ARFP(1)E remote control switch.
The manual specifies service and operation spaces required for maintenance, including:
Instructions for air filter servicing are provided, detailing both lower and lateral extraction methods. This includes turning fixing screws and pulling down or folding the air filter. The drain piping system includes a drain pump, and the manual outlines a procedure to check proper water flow by filling the drain pan with approximately 1.2 liters of water. It also emphasizes the importance of insulating drain pipes to prevent condensation and installing a drain trap near the indoor unit.
Safety information is prominently featured, with warnings and cautions regarding electrical work, refrigerant handling (R32 is flammable), installation location (avoiding flammable environments, oil presence, corrosive atmospheres, and strong electromagnetic radiation sources), and general handling. It is stressed that installation and maintenance should only be performed by qualified personnel.
General| Brand | Hitachi |
|---|---|
| Model | RPIH-4.0FSRE |
| Category | Air Conditioner |
| Language | English |
