Install Instructions

37
Tech.Doc - 03/21 - Subject to change. © Belimo Aircontrols (USA), Inc.
Exhaust Fan
(Operates only in Free Cooling and Integrated Cooling.)
Note:
In theory, if Exh Fan On Pos/Low Exh Fan Pos for damper % is set
very low, then Exhaust Fan could also run in other modes (Ventilation,
Mechanical, DCV).
• Control of the exhaust fan is damper position dependent. Damper
setpoint for enable/disable of the exhaust fan is Indoor Fan Speed
dependent (High Speed Damper Setpoint = Exh Fan On Pos; Low
Speed Damper Setpoint = Low Exh Fan Pos).
• IF Damper Pos is 10% greater than Exh Fan On Pos/ Low Exh Fan
Pos
OR Damper Pos is 100% open
THEN Exhaust Fan will be energized.
• IF Damper Pos is 10% less than Exh Fan On Pos/ Low Exh Fan Pos
OR Damper Pos is less than 5% open
THEN Exhaust Fan will be de-energized.
Example: If Exh Fan On Pos is set at 45%, when damper opens to 55%,
exhaust fan will turn on. When damper closes to 35%, exhaust fan will
turn off.
Service and Comissioning
Manual Override 1 & 2
These menus are available after Setup has been complete. This is
selected in Level 2 menu of Service and Commissioning. This supports
the commissioning phase allowing all connected RTU components
(except for the room thermostat) to be tested by manually commanding
them through the keypad interface.
To prevent RTU safety lockout and
possible equipment damage, ensure the RTU indoor fan is running!
Return to Automatic will occur automatically between 1...8 hours
(adjustable) unless Return to Automatic is selected.
Note:
Damper will move at high speed.
Note:
Compressors, exhaust fan
1
and indoor 2 speed fan
1
minimum
on or minimum off time does NOT apply in this test state. They will be
turned on and off immediately based on the entered command. Also,
exhaust fan
1
will not be turned on automatically based on damper
position in this mode, but it can be manually commanded.
Damper Scaling
If there was a mechanical failure or adjustment that prevented proper
damper scaling from virgin to automatic, it can be rescaled. “Damper
scaling starts in 10 secs” and will countdown to 0. A message will scroll
saying “Damper scaling for better operation if obstruction is present
rescale damper in commissioning menu”. (For detailed instructions on
this – please see the section “Service and Commissioning” below. This
will open damper to 100% (re-scale control signal if needed). (Note:
failure to identify obstructions or improper setup of damper assembly
may result in an improper scaling and operation of the damper.)
Once scaling is complete, a message will appear saying “Damper scaling
successful”. The ZIP will then show “maximum at 80° = 100%” That
message will show maximum rotation of the damper. This process
ensures the damper is always operating and displayed from 0...100%.
Forced Modes
During commissioning, it is required to bring the ZIP and the connected
actuator in a particular position. For this operation, the following forced
modes are available:
• Free cooling
• Integrated cooling
• Mechanical cooling
• DCV 1
• Unoccupied
The timeout for the active forced mode can be defi ned in “Manual
Overrride2 Forced Modes”. After the defi ned time in hours, the forced
mode will automatically reset, and the ZIP will operate in “automatic
mode”.
Sensor calibration
It is possible to calibrate all sensors directly connected to the ZIP. The
calibration must be performed manually with an external accurate
reference value and is a one-point calibration. The commissioning
engineer must confi rm the calibrated value. The origin value is always
stored for reference. The sensor calibration is located in the ”Service and
Commissioning” menu.
End of Sequences
1
Only available with Energy Module Option. If no Energy Module exists associated menu
options will not be displayed.
2
Subject to Compressor Protection Strategies as noted earlier.
3
The following modes listed below take display priority on the ZIP MMI when co-existing with
this mode.
4
This could possibly happen if W1/O/B and Y1 are energized together calling for heating and
cooling at the same time (provided that RTU is not confi gured as a Heat Pump.) An alarm will
be generated.
5
Minimum on/off times must be observed before compressor will be commanded.
6
“G” must be energized to run test.
7
Sensor calibration only available with fi rmware V02.01.1003
ZIP Economizer
Method of Operation