29
Zone Number ( ) Commissioning
VAV damper actuator properly rigged and verified? ( opens and closes with demand )
Proper adjustments of zone side take off balancing damper?
Proper balancing of zone minimum position?
CFM =
Proper balancing of zone maximum position?
CFM =
Proper balancing of zone MaxHeatflow position? (If reheat is used)
CFM =
Verification of Reheat (If reheat is used)
Maximum Delta temperature of Reheat (If duct reheat is used)
Important configuration property set ?
-
Zone MAC:
-
PAN ID
-
Channel
-
RTC MAC:
-
Lockout:
-
RehtConf:
If reheat is used
-
AO2 OALK:
If reheat is used
-
BO5 OALK:
If reheat is used
-
Heat max:
-
Cool min:
-
Min Pos:
-
Max Pos:
-
MaxHTPos:
-
PIHT Wei:
Is this zone a master in heating?
-
PICL Wei:
Is this zone a master in heating?
Communication with RTU is active? ( Status LED & outdoor temperature display )
Bold items are critical for proper system operation
6) Things You Need to Know
6A) Single 24 Vac Zone Transformer vs. Multi 24 Vac Zone Transformers
It is possible to use a single 24 Vac transformer for each zone thermostat or you may use a single large
central 24 Vac transformer for many zone thermostats.
If using a single 24 Vac for each zone thermostat.
-
Use a 20 VA or more Class2 self protected transformer to power all components attached to the
zone thermostat.
-
Be sure to respect the polarity of all components in the circuit: analog VAV actuator, analog reheat,
etc…
-
Be sure that if a ground is required, the common side of the circuit is the one connected to earth (0
V ~ Com). Grounding is required only at one location to prevent ground loops.
If using a large central 24 Vac transformer for many zones.
-
If using Class1 unprotected transformer to power all components attached to the ZN thermostat.
Be sure that the installed fuse or circuit protection is sized according to the maximum installed
required current load. This is not necessarily the same as the maximum current available from the
transformer. Ex.: If a 100 VA transformer is installed and the maximum installed load is 45 VA for
all devices attached, then the fused value should be 2 amps maximum at 24 Vac.
-
Be sure to respect the polarity of all components in the circuit: All analog VAV actuator(s), all
analog reheat devices, etc…
-
Be sure that if grounded is required, the common side of the circuit is the one connected to earth (0
V ~ Com) Grounding is required only at one location to prevent ground loops.
