Table of Contents
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CONTENTS
SAFETY HANDLING FOR R32
1. Caution for refrigerant leakage ................................................................................................................. 2
1-1. Refrigerant property ......................................................................................................................... 2
1-2. Confirm the Critical concentration and take countermeasure .......................................................... 2
2. Installation restrictions .............................................................................................................................. 3
2-1. Installing the outdoor unit or the Hydro unit outdoor ........................................................................ 3
2-2. Installing the Hydro unit or the HBC indoor ..................................................................................... 5
3. Installation flow chart ................................................................................................................................ 6
4. Installation chart annex ............................................................................................................................. 10
5. Regulatory requirements list for safety measures..................................................................................... 13
MEES18K085
SAFETY HANDLING FOR R32
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Table of Contents
Related Manuals for Mitsubishi Electric HYBRID CITY MULTI Series
Summary of Contents for Mitsubishi Electric HYBRID CITY MULTI Series
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Page 1: Table Of Contents
CONTENTS SAFETY HANDLING FOR R32 SAFETY HANDLING FOR R32 I.SAFETY HANDLING FOR R32 1. Caution for refrigerant leakage ......................... 2 1-1. Refrigerant property ......................... 2 1-2. Confirm the Critical concentration and take countermeasure ............2 2. Installation restrictions ..........................3 2-1. -
Page 2: I.safety Handling For R32
Outdoor units. e.g.Shorten the refrigerant piping as much as possible. Note 1. In principle, MITSUBISHI ELECTRIC requires proper piping design, installation and air-tight testing after installation to avoid leakage happening. In the area should earthquake happen, anti-vibration measures should be fully considered. -
Page 3: Installation Restrictions
2. Installation restrictions SAFETY HANDLING FOR R32 2. Installation restrictions Observe the following restrictions that apply to the installation of units. 2-1. Installing the outdoor unit or the Hydro unit outdoor Do not install the unit where combustible gas may leak. - If combustible gas accumulates around the unit, fire or explosion may result. - Page 4 2. Installation restrictions SAFETY HANDLING FOR R32 If the unit needs to be installed in a space where all four sides are blocked, confirm that one of these situations (A, B, or C) is satisfied. Secure sufficient installation space (minimum installation area: Amin). Install the unit in a space with an installation area of Amin or more, corresponding to the refrigerant amount (M).
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Page 5: Installing The Hydro Unit Or The Hbc Indoor
2. Installation restrictions SAFETY HANDLING FOR R32 2-2. Installing the Hydro unit or the HBC indoor When installing Hydro unit/HBC in machinery room or small room, take safety measures in accordance with the European Standard, based on the system refrigerant amount and the room volume as shown in the figure 2. (The installation restrictions can be simply found by using the flowchart.) Refrigerant concentration and required quantity of safety measures Figure 2... -
Page 6: Installation Flow Chart
3. Installation flow chart SAFETY HANDLING FOR R32 3. Installation flow chart Using the flowchart, make sure the installation restrictions that apply to R32 HVRF models are met. Even if "Installation OK" is reached in the flowchart, see "Installation chart annex". *This flow chart was created based on IEC60335-2-40 (ver. - Page 7 3. Installation flow chart SAFETY HANDLING FOR R32 Small room installation NEXT PAGE Hydro unit/HBC is installed in the space where Installation Installation the refrigerant concentration is not allowed not allowed less than 0.16 (kg/m when refrigerant <Refrigerant concentration leaks. determination>...
- Page 8 3. Installation flow chart SAFETY HANDLING FOR R32 Small room installation Air-circulation Installation Installation device required by applicable not allowed not allowed regulations is <Circulation installed. requirement> IEC/GG.10.2 ISO/part3-6.2 Hydro Hydro unit/HBC is installed unit/HBC is Hydro in the space where the installed in the space where unit/HBC is installed Installation...
- Page 9 3. Installation flow chart SAFETY HANDLING FOR R32 Small room installation Two safety Two safety measures: alarm measures: shut-off Installation Installation and ventilation required by valves and ventilation required not allowed not allowed applicable regulations, are by applicable regulations, are installed additionally.
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Page 10: Installation Chart Annex
4. Installation chart annex SAFETY HANDLING FOR R32 4. Installation chart annex <Installation example of safety measures> * The alarm shall warn audibly and visibly such as both a loud buzzer and flashing light. * Refer to the Installation manuals of the Hydro unit and of the HBC for installation instructions. (1) Machinery room installation (Continuous ventilation) (Continuously) (Continuously) - Page 11 4. Installation chart annex SAFETY HANDLING FOR R32 (7) Small room installation (Shut-off valves) (6) Small room installation (Shut-off valves + Ventilation) Unoccupied space not designated a machinery room Unoccupied space not designated a machinery room Supply Supply Shut-off Shut-off Shut-off Shut-off Shut-off...
- Page 12 4. Installation chart annex SAFETY HANDLING FOR R32 (12) Ceiling space installation (Circulation + Alarm + Ventilation) (13) Small room installation (Circulation + Shut-off valves + Ventilation) Supervised location Supervised location Supervised location Unoccupied space not designated a machinery room Supply Supply Unoccupied space not designated a machinery room...
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Page 13: Regulatory Requirements List For Safety Measures
5. Regulatory requirements list for safety measures SAFETY HANDLING FOR R32 See below for information on installing a safety device on the HVRF R32 system. 5. Regulatory requirements list for safety measures *The requirements listed below were established based on IEC60335-2-40 (ver. 6) and ISO5149 (2014). See the original standards for further information on selecting a safety device. - Page 14 5. Regulatory requirements list for safety measures SAFETY HANDLING FOR R32 <Regulatory requirements for refrigerant leakage detector> Alarm threshold shall be set to be activated before the refrigerant concentration reaches 25% of the LFL. The LFL shall be taken at WCF (Worst Case Formulation) as defined in ISO 817. <IEC/LL.1><ISO-3/9.4.2> Refrigerant detection system shall make output signal to activate the safety measures within 30 seconds at the refrigerant concentration of 25% of LFL or lower.
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