Reznor RECC Unit Installation Manual - Manual (Page 69)

Form I-MAPSIII&IV, P/N 222917R9, Page 69
2. Perform Air Balance Procedure on the Energy Recovery Supply Fan
a) On the MAPS ® unit, open the control panel door (see FIGURE 15, page 30).
On the wall next to the blower compartment, locate the pressure tap. Connect a
manometer at the pressure tap.
b) Energize the energy recovery supply blower circuit. If the energy recovery
module has an inlet damper, there will be a delay while the damper opens and
closes the damper end switch that energizes the supply blower.
c) Energize the MAPS ® blower system circuit.
d) On the manometer, check the pressure. If the measurement is between 0” and
-.50” w.c., the supply fan does not need to be adjusted. If the measurement is
not in that range, follow the instructions below:
1) De-energize the energy recovery module and the MAPS ® unit. (If the MAPS ®
unit has a gas heat section, turn off the gas.)
2) Loosen belt tension and remove the belt.
3) Loosen the set screw on the side of the pulley.
4) To increase the blower speed, turn the adjustable half of the pulley inward.
To decrease the blower speed, turn the adjustable half of the pulley
outward. One turn of the pulley will change the speed 8-10%.
5) Tighten the set screw on the flat portion of the pulley shaft.
6) Replace the belt and adjust the belt tension. (See Paragraph 6.6.1).
7) Energize the system and check the pressure reading. When the
measurement on the manometer is between 0” and -.50” w.c., the supply fan
is set. Disconnect the manometer and close the control panel door.
3. Perform Air Balance procedure on the Energy Recovery Exhaust Fan
The exhaust blower system operates as an independent air system and can be
adjusted using standard air balance procedures with no effect to the MAPS ® or
energy recovery supply air systems.
10.4 Checklist After
Startup:
Assumptions: All checks have been successfully performed and system is operating
properly. All panels and doors are secure. The area has been cleared of any excess
supplies, scraps, and debris.

Place "Literature/Parts Bag" containing Limited Warranty information, this booklet,
the operation/maintenance/service manual, control instructions, and any informa-
tion on optional controls in an accessible location.
 IMPORTANT: After at least 8 hours but no longer than a week of operation,
recheck the blower wheel including all set screws, the blower pulley, the motor pul-
ley, and belt tension. Make any required adjustments.
Setscrew torque for pulley (sheave) is 110 in-lb minimum to 130 in-lb maximum.
Setscrew torque for bearing hub with 1-3/8" to 1-3/4" shaft is 165 in-lbs. Socket
setscrew size is 5/16".
Check belt tension after the first 24 hours of operation at full load; see instructions
in Paragraph 6.6.1.