2.2.48. HRV Control Command Class, version 1

The Heat Recovery Ventilation (HRV) Control Command Class is introducing control of Heat Recovery Ventilation systems via the Z-Wave interface.

2.2.48.1. HRV Mode Set Command

This command is used to set the desired mode in the device.

Table 2.263 HRV Mode Set

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_MODE_SET (0x01)

Reserved

Mode

Mode (5 bits)

The mode identifier MAY be set to the following values:

Table 2.264 HRV Mode

Mode

Name

Description

0

Off

The HRV system is in the off state, frost protection can occur.

1

Demand / Automatic

The HRV system is controlled based on sensor input.

2

Schedule

The HRV system is controlled based on predefined input from the factory and/or user/installer.

3

Energy Savings Mode

The HRV system will be put into a reduced heat / ventilation mode.

4

Manual

The HRV system is in manual mode.

The command HRV Manual Control Set may be used to manually control the device.

All other values are reserved and MUST NOT be used by a sending node. Reserved values MUST be ignored by a receiving node.

Reserved

This field MUST be set to 0 by a sending node and MUST be ignored by a receiving node.

2.2.48.2. HRV Mode Get Command

This command is used to request the current mode from the device.

The HRV Mode Report Command MUST be returned in response to this command.

This command MUST NOT be issued via multicast addressing.

A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.

Table 2.265 HRV Mode Get

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_MODE_GET (0x02)

2.2.48.3. HRV Mode Report Command

The HRV Mode Report Command is used to report the mode from the device.

Table 2.266 HRV Mode Report Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_MODE_REPORT (0x03)

Reserved

Mode

Mode (8 bits)

Refer to description under the Section 2.2.48.1 HRV Mode Set command.

Reserved

This field MUST be set to 0 by a sending node and MUST be ignored by a receiving node.

2.2.48.4. HRV Bypass Set Command

This command is used to set the bypass mode when the ventilation system is set to manual mode. If the system is not in manual mode while receiving this command it MUST be ignored.

Table 2.267 HRV Bypass Set Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_BYPASS_SET (0x04)

Bypass

Bypass (8 bits)

The value MAY be 0x00 (close) or 0xFF (open).

Furthermore, the field MAY carry a percentage value between 1 to 99 (0x01 - 0x63). If the ventilation system supports modulated bypass, the percentage value will represent the aperture of the bypass. If the system does not support the full range of aperture steps, the values SHOULD be mapped linearly over the entire scale.

If ventilation system does support modulated bypass the values from 1 to 99 MUST be interpreted as fully open.

The value 254 (0xFE) MAY be used to set the bypass into automatic mode.

2.2.48.5. HRV Bypass Get Command

This command is used to request the current bypass setting.

The HRV Bypass Report Command MUST be returned in response to this command.

This command MUST NOT be issued via multicast addressing.

A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.

Table 2.268 HRV Bypass Get Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_BYPASS_GET (0x05)

2.2.48.6. HRV Bypass Report Command

This command is used to report the current bypass parameters.

Table 2.269 HRV Bypass Report Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_BYPASS_REPORT (0x06)

Bypass

Bypass (8 bits)

See description in Section 2.2.48.4 HRV Bypass Set command.

2.2.48.7. HRV Ventilation Rate Set Command

This command is used to set the ventilation rate when the ventilation system is set to manual mode. If the system is not in manual mode while receiving this command it MUST be ignored.

Table 2.270 HRV Ventilation Rate Set Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_VENTILATION_RATE_SET (0x07)

Ventilation Rate

Ventilation Rate (8 bits)

The value MAY be 0x00 (off) or 0xFF (on).

The field MAY carry a percentage value between 1 to 99 (0x01 - 0x63). A ventilation system MAY map the values 1..99 to less than 99 steps.

2.2.48.8. HRV Ventilation Rate Get Command

This command is used to request the current ventilation rate setting.

The HRV Ventilation Rate Report Command MUST be returned in response to this command.

This command MUST NOT be issued via multicast addressing.

A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.

Table 2.271 HRV Ventilation Rate Get Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_VENTILATION_RATE_GET (0x08)

2.2.48.9. HRV Ventilation Rate Report Command

This command is used to report the current ventilation rate setting.

Table 2.272 HRV Ventilation Rate Report Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_VENTILATION_RATE_SET (0x07)

Ventilation Rate

Ventilation Rate (8 bits)

See description under Section 2.2.48.7 HRV Ventilation Rate Set Command.

2.2.48.10. HRV Mode Supported Get Command

This command is used to request the supported modes from the device.

The HRV Mode Supported Report Command MUST be returned in response to this command.

This command MUST NOT be issued via multicast addressing.

A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.

Table 2.273 HRV Mode Supported Get Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_MODE_SUPPORTED_GET (0x0A)

2.2.48.11. HRV Mode Supported Report Command

This command is used to report the supported modes from the device.

Table 2.274 HRV Mode Supported Report Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_HRV_CONTROL (0x39)

Command = HRV_CONTROL_MODE_SUPPORTED_REPORT (0x0B)

Reserved

Manual Control Supported

Bit Mask 1

…

Bit Mask N

Reserved

This field MUST be set to 0 by a sending node and MUST be ignored by a receiving node.

Manual Control Supported (3 bits)

The manual control supported bits describes the supported manual control modes of the ventilation system. The mode is supported if the bit is 1. If the bit is 0, the mode is not supported.

The bits are mapped to the following controls:

Table 2.275 HRV Manual Control Support

Bit

Name

0

Bypass Open / Close

1

Bypass Auto

2

Modulated Bypass

3

Ventilation Rate

E.g. a ventilation system supporting only open and close would report Manual Control Supported = 0x01.

Bit Mask (N bytes)

The Bit Mask fields describe the supported modes by the device.

  • Bit 0 in Bit Mask 1 field indicates if Mode = 0 (Off) is supported.

  • Bit 1 in Bit Mask 1 field indicates if Mode = 1 (Demand / Automatic) is supported.

  • …

If the Mode is supported the bit MUST be set to 1. If the Mode is not supported the bit MUST be set to 0. It is only necessary to send the Bit Mask fields from 1 and up to the one indicating the last supported mode. The number of Bit Mask fields transmitted MUST be determined from the length field in the frame.

All available modes are given in Section 2.2.48.1 HRV Mode Set.