51
TEMPMASTER
FORM TPM3-EG1 (518)
Purge
Note:
All cooling and heating modes are disabled during smoke purge.
Purge shall be used to displace the air inside the space with fresh outside air. When this
sequence is started, the following shall occur:
1. Start the supply fan if not already on. (
Note:
With VAV units, the fan speed shall be
controlled to maintain the active duct pressure setpoint.)
2. Start the return and exhaust fans if not already on.
3. Set the VFD to 100%.
4. Set the OA damper position to 100% and the exhaust damper to 100%.
Pressurization
Pressurization shall be used to pressurize the building or space in order to force the air
inside the space through the walls to adjacent spaces or outside the building envelope.
When this sequence is started, the following shall occur:
1. Start the supply fan if not already on. (
Note:
With VAV units, the fan speed shall be
controlled to maintain the active duct pressure setpoint.)
2. Stop the return and exhaust fans if on.
3. Set exhaust/return fan VFD to 0%.
4. Set the OA damper to 100% and the exhaust damper to 0%.
Evacuation
Evacuation shall be used to evacuate (negatively pressurize) the building or space in or-
der to draw air through the walls from adjacent spaces or outside the building envelope.
When this sequence is started, the following shall occur:
1. Stop the supply fan if on.
2. Start the return and exhaust fans if not already on.
3. Set the exhaust/return fan VFD to 100%.
4. Set the OA damper to 0% and the exhaust damper to 100%.
SPECIFIC SEQUENCES
(See Installation, Operation, and Maintenance manual (Form
TPM3-NOM1) for further detail)
Variable Air Volume (VAV) Mode
Occupied Cooling –
In the occupied cooling mode, the unit controller monitors the RAT
and compares it to the RAT cooling setpoint. The RAT cooling setpoint is entered into the
unit controller through the setpoint key, cooling subsection of the user interface. If the RAT
is equal to or greater than the RAT cooling setpoint plus 0.5°F, the unit controller will place
the unit in the occupied cooling mode. The unit will remain in the occupied cooling mode
until the RAT is equal to or less than the RAT cooling setpoint minus 0.5°F.