Greenheck Vari-Flow Air Management System(476251) - Manual (Page 16)

16 Vari-Flow Air Management System
B. Setpoint
The Setpoint menu allows the user to view and adjust temperature related
parameters.
T
HIS SCREEN DISPLAYS THE CURRENT SET POINTS FOR THE
T
EMPERATURE
I
NTERLOCK
FEATURE
.
The user can use the default exhaust fan temperature set points or configure them
using the system optimization process. This option satisfies IMC 507.2.1.1
(Fan(s) must automatically activate when cooking operations occur.)
• Temp On Set Point: The temperature at which the fan(s) automatically turn on
based on the temperature of the associated hood. The default is 115°F and is
adjustable.
• Temp Off Set Point: The temperature at which the fan(s) automatically turn
off based on the temperature of the associated hood. It must also satisfy the
requirement of the Minimum Off Delay Set Point. The default is 90°F and is
adjustable.
• Off Delay Set Point: The amount of time the temperature must remain
below the Minimum Off Set point before the fan(s) will turn off. The default is
10 minutes and is adjustable.
Temperature Interlock
Enable: ON
Temp On: 115.0°F
Temp Off: 90.0°F
Delay Off: 600s
T
HIS SCREEN DISPLAYS EXHAUST FAN SETUP
.
Low Temp: Temperature that the fan will start to increase in speed from the low
speed set point.
High Temp: Temperature that the fan will be at the high speed set point.
Low Speed: Minimum speed of the fan.
High Speed: Maximum speed of the fan.
Depending on the number of exhaust fans, other exhaust fan setup pages will appear.
Exhaust Fan 1 Setup
Temp Speed
Low: 90.0°F 50.0%
High: 115.0°F 100.0%
CFM: XXXX
T
HIS SCREEN DISPLAYS THE SUPPLY FAN SETUP
.
Design Max Speed: Design airflow of the supply fan.
Min: Minimum speed of the supply fan.
Max: Maximum speed of the supply fan.
Min Tempering: Minimum speed of the supply fan when it is tempering.
Depending on the number of supply fans, other supply fan setup pages will appear.
Supply Fan 1 Setup
Design MaxSpd CFM:XXX
Min: 50.0%
Max: 100.0%
Min Tempering: 66.0%
T
HESE PARAMETERS DICTATE THE AMOUNT TIME THE THAT THE FAN RUNS AT FULL
SPEED WHEN THE “FAN 100%” BUTTON IS PRESSED .
Override
Duration: 10m
T
HIS SCREEN DISPLAYS THE SETTING FOR THE
E
XHAUST
F
ANS IN THE EVENT OF A FIRE
.
Once the fire inspection has been completed, this should not be changed.
Factory Settings
Smoke Fire Stat
Exhaust Fans: 100%
T HIS SCREEN DISPLAYS THE HIGH TEMPERATURE ALARM SETTINGS .
When enabled and the temperature reaches the Temp On set point the shunt trip
output will become active, forcing the electric equipment off. If there is an electric
gas valve and it is wired into the VAV system it will also turn that off. Once the
temperature is below the Temp Off set point the shunt trip output and gas valve
will return to normal state.
Remember that the shunt trip breaker will have to be manually reset as well as the
electric gas valve.
High Temperature Alm
Enable: Off
Temp On: 210.0°F
Temp Off: 205.0°F
®