Installation instructions – Reznor R6GI Option - Installation - Motorized Fresh Air Damper - Light Commercial User Manual
Page 2
FORM# NEI35OM06
SUPERSEDES 05-25-12
JUNE 5, 2012
Fresh Air Damper Position Adjustment
Slide damper position for ventilation of building contaminants and people occupancy can be adjusted to the proper CFM
requirements using the following guidelines. Consult your State or local codes as required.
1.
Disconnect main power to the unit.
2.
Set the thermostat Fan switch to “ON” or place a jumper across “R” and “G” at the unit low voltage terminal strip.
3.
Restore power to the unit. Blower should energize and run continuously while the motorized damper moves to the
open position.
Calculate the appropriate mixed air temperature per the following equation:
* (Return Air Temp. x % of Return Air) + (Outside Air Temp. x % of Outside Air) = Mixed Air Temperature
Example:
Assume local code requires 10% outdoor air during occupied conditions, (200 CFM of total unit CFM = 2,000) outdoor air is
50 Deg. F, and return air is 75 Deg. F.
Under these conditions, what is the mixed air temperature in the supply duct?
* (50 Deg. F x 0.1) + (75 Deg. F x 0.9) = 5.0 Deg. F + 67.5 Deg. F = 72.5 Deg. F
Ad just the slide damper po si tion un til the mixed sup ply air tem per a ture reaches the cal cu lated value.
Note: It will be nec es sary to re move the in take hood so the sec ond slide damper can be re moved, if the full
amount of out side air is re quired.
4.
Once damper adjustments are completed, turn off power to the outdoor unit. Motorized damper will move to closed
position.
5.
Remove jumper across “R” & “G” or return thermostat fan switch back to “AUTO” if desired.
6.
Restore power back to unit.
0-35% MOTORIZED FRESH AIR DAMPER
# 547840
FOR USE ON PACKAGE EQUIPMENT MODELS
R6G(D,F,I) / R8GD / P6SD / Q6SD 024-060
INSTALLATION
INSTRUCTIONS